/* ===================================
   DESIGN SYSTEM & VARIABLES
   =================================== */
:root {
    /* Colors */
    --color-primary: #6366f1;
    --color-primary-dark: #4f46e5;
    --color-primary-light: #818cf8;
    --color-secondary: #8b5cf6;
    --color-success: #10b981;
    --color-danger: #ef4444;
    --color-warning: #f59e0b;
    --color-info: #3b82f6;
    
    /* Neutrals */
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-400: #9ca3af;
    --color-gray-500: #6b7280;
    --color-gray-600: #4b5563;
    --color-gray-700: #374151;
    --color-gray-800: #1f2937;
    --color-gray-900: #111827;
    
    /* Semantic Colors */
    --color-bg: #ffffff;
    --color-bg-secondary: #f9fafb;
    --color-bg-tertiary: #f3f4f6;
    --color-text: #111827;
    --color-text-secondary: #6b7280;
    --color-text-tertiary: #9ca3af;
    --color-border: #e5e7eb;
    --color-border-light: #f3f4f6;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===================================
   RESET & BASE STYLES
   =================================== */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

a {
    color: inherit;
    text-decoration: none;
    transition: color var(--transition-fast);
}

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input, textarea {
    font-family: inherit;
}

/* ===================================
   LANDING PAGE STYLES
   =================================== */

/* Navigation */
.landing-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border-light);
    z-index: 1000;
    padding: 1rem 0;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    width: 32px;
    height: 32px;
    color: var(--color-primary);
}

.logo-text {
    font-size: var(--font-size-xl);
    font-weight: 700;
    color: var(--color-text);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 2rem;
}

.nav-links a {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition-fast);
}

.nav-links a:hover {
    color: var(--color-primary);
}

/* Hero Section */
.hero {
    padding: 8rem 2rem 6rem;
    text-align: center;
    background: linear-gradient(135deg, #f9fafb 0%, #ffffff 100%);
}

.hero-content {
    max-width: 800px;
    margin: 0 auto;
}

.hero-title {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
    color: var(--color-text);
}

.hero-subtitle {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    margin-bottom: 2.5rem;
    line-height: 1.6;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-bottom: 2rem;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-full);
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.hero-badge svg {
    width: 16px;
    height: 16px;
    color: var(--color-success);
}

/* Buttons */
.btn-primary, .btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--font-size-sm);
    transition: all var(--transition-base);
}

.btn-primary {
    background: var(--color-primary);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    background: var(--color-primary-dark);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background: var(--color-bg-secondary);
    border-color: var(--color-gray-300);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: var(--font-size-base);
}

/* Sections */
.section-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 5rem 2rem;
}

.section-title {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    text-align: center;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.section-subtitle {
    font-size: var(--font-size-lg);
    text-align: center;
    color: var(--color-text-secondary);
    margin-bottom: 3rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

/* Features Section */
.features {
    background: var(--color-bg);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.feature-card {
    padding: 2rem;
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.feature-card:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.feature-icon svg {
    width: 24px;
    height: 24px;
    color: white;
}

.feature-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

.feature-card p {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* About Section */
.about {
    background: var(--color-bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.about-text p {
    margin-bottom: 1rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 2rem;
}

.stat {
    text-align: center;
}

.stat-value {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

/* Visual Card */
.visual-card {
    background: white;
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
    overflow: hidden;
}

.visual-header {
    padding: 1rem;
    background: var(--color-gray-50);
    border-bottom: 1px solid var(--color-border);
}

.visual-dots {
    display: flex;
    gap: 0.5rem;
}

.visual-dots span {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--color-gray-300);
}

.visual-content {
    padding: 2rem;
}

.visual-balance {
    text-align: center;
    margin-bottom: 2rem;
}

.visual-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.visual-amount {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--color-text);
}

.visual-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    padding: 1.5rem;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
}

.visual-stat {
    text-align: center;
}

.visual-stat-label {
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
    margin-bottom: 0.25rem;
    text-transform: uppercase;
}

.visual-stat-value {
    font-size: var(--font-size-xl);
    font-weight: 600;
}

.visual-stat.income .visual-stat-value {
    color: var(--color-success);
}

.visual-stat.expense .visual-stat-value {
    color: var(--color-danger);
}

/* Audience Section */
.who-its-for {
    background: var(--color-bg);
}

.audience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.audience-card {
    text-align: center;
    padding: 2rem;
}

.audience-emoji {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.audience-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

.audience-card p {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Philosophy Section */
.philosophy {
    background: var(--color-bg-secondary);
}

.philosophy-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}

.philosophy-quote {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    font-style: italic;
    color: var(--color-text);
    margin: 2rem 0;
    padding: 2rem;
    background: white;
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-md);
    text-align: left;
}

.philosophy-principles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
    text-align: left;
}

.principle h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.principle p {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* CTA Section */
.cta-section {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    padding: 5rem 2rem;
    text-align: center;
}

.cta-content h2 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: white;
    margin-bottom: 1rem;
}

.cta-content p {
    font-size: var(--font-size-xl);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
}

.cta-content .btn-primary {
    background: white;
    color: var(--color-primary);
}

.cta-content .btn-primary:hover {
    background: var(--color-gray-100);
}

/* Footer */
.footer {
    background: var(--color-gray-900);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: 4rem;
    margin-bottom: 2rem;
}

.footer-brand .logo-icon {
    color: white;
}

.footer-tagline {
    margin-top: 1rem;
    color: var(--color-gray-400);
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.footer-column h4 {
    font-size: var(--font-size-sm);
    font-weight: 600;
    margin-bottom: 1rem;
    color: white;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.footer-column a {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--color-gray-400);
    font-size: var(--font-size-sm);
}

.footer-column a:hover {
    color: white;
}

.footer-bottom {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 2rem 1rem;
    border-top: 1px solid var(--color-gray-800);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-bottom p {
    color: var(--color-gray-400);
    font-size: var(--font-size-sm);
}

.footer-badges {
    display: flex;
    gap: 1rem;
}

.badge {
    font-size: var(--font-size-xs);
    padding: 0.25rem 0.75rem;
    background: var(--color-gray-800);
    border-radius: var(--radius-full);
    color: var(--color-gray-400);
}

/* ===================================
   APP PAGE STYLES
   =================================== */

.app-page {
    display: flex;
    min-height: 100vh;
    background: var(--color-bg-secondary);
}

/* Sidebar */
.sidebar {
    width: 260px;
    background: white;
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    position: fixed;
    left: 0;
    top: 0;
    bottom: 0;
    z-index: 100;
}

.sidebar-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.sidebar-nav {
    flex: 1;
    padding: 1rem 0;
    overflow-y: auto;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1.5rem;
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: all var(--transition-fast);
}

.nav-item svg {
    width: 20px;
    height: 20px;
}

.nav-item:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text);
}

.nav-item.active {
    background: var(--color-primary);
    color: white;
    position: relative;
}

.nav-item.active::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: var(--color-primary-dark);
}

.sidebar-footer {
    padding: 1rem 0;
    border-top: 1px solid var(--color-border);
}

/* Main Content */
.main-content {
    flex: 1;
    margin-left: 260px;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Topbar */
.topbar {
    background: white;
    border-bottom: 1px solid var(--color-border);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.menu-toggle {
    display: none;
    width: 40px;
    height: 40px;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
}

.menu-toggle:hover {
    background: var(--color-bg-secondary);
}

.menu-toggle svg {
    width: 24px;
    height: 24px;
}

.page-title {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text);
}

.topbar-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.privacy-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--color-success);
    color: white;
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
}

.privacy-badge svg {
    width: 16px;
    height: 16px;
}

/* Dashboard Container */
.dashboard-container {
    flex: 1;
    padding: 2rem;
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
}

/* Balance Card */
.balance-card {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: var(--radius-xl);
    padding: 2rem;
    color: white;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-lg);
}

.balance-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.balance-header h2 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    opacity: 0.9;
}

.balance-info svg {
    width: 20px;
    height: 20px;
    opacity: 0.7;
}

.balance-amount {
    font-size: var(--font-size-5xl);
    font-weight: 700;
    margin-bottom: 2rem;
}

.balance-stats {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 2rem;
    background: rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.stat-icon {
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-icon svg {
    width: 24px;
    height: 24px;
}

.stat-label {
    font-size: var(--font-size-sm);
    opacity: 0.9;
    margin-bottom: 0.25rem;
}

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
}

.stat-divider {
    width: 1px;
    background: rgba(255, 255, 255, 0.2);
}

/* Dashboard Grid */
.dashboard-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: 2rem;
}

/* Card */
.card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--color-border);
    overflow: hidden;
}

.card-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
}

.card-actions {
    display: flex;
    gap: 0.5rem;
}

.icon-btn {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    transition: all var(--transition-fast);
}

.icon-btn:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text);
}

.icon-btn svg {
    width: 18px;
    height: 18px;
}

.card-body {
    padding: 1.5rem;
}

/* Transaction List */
.transaction-list {
    list-style: none;
    max-height: 500px;
    overflow-y: auto;
}

.transaction-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-bottom: 0.5rem;
    background: var(--color-bg-secondary);
    position: relative;
    transition: all var(--transition-fast);
}

.transaction-list li:hover {
    background: var(--color-bg-tertiary);
}

.transaction-list li.plus {
    border-left: 4px solid var(--color-success);
}

.transaction-list li.minus {
    border-left: 4px solid var(--color-danger);
}

.transaction-list li span {
    font-weight: 600;
}

.transaction-list li.plus span {
    color: var(--color-success);
}

.transaction-list li.minus span {
    color: var(--color-danger);
}

.delete-btn {
    position: absolute;
    left: -12px;
    top: 50%;
    transform: translateY(-50%);
    width: 24px;
    height: 24px;
    background: var(--color-danger);
    color: white;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: var(--font-size-xs);
    opacity: 0;
    transition: opacity var(--transition-fast);
}

.transaction-list li:hover .delete-btn {
    opacity: 1;
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 1rem !important;
    text-align: center;
    background: transparent !important;
    border: 2px dashed var(--color-border) !important;
}

.empty-state svg {
    width: 48px;
    height: 48px;
    color: var(--color-text-tertiary);
    margin-bottom: 1rem;
}

.empty-state p {
    color: var(--color-text-secondary);
    max-width: 300px;
}

/* Transaction Form */
.transaction-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.form-group label {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text);
}

.form-input {
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.amount-input-wrapper {
    position: relative;
}

.currency-symbol {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-secondary);
    font-weight: 600;
}

.amount-input {
    padding-left: 2.5rem;
}

.form-hint {
    display: flex;
    align-items: flex-start;
    gap: 0.5rem;
    padding: 0.75rem;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    font-size: var(--font-size-xs);
    color: var(--color-text-secondary);
}

.form-hint svg {
    width: 16px;
    height: 16px;
    flex-shrink: 0;
    margin-top: 2px;
}

.form-actions {
    display: flex;
    gap: 1rem;
}

.btn-submit {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.875rem 1.5rem;
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: var(--font-size-base);
    transition: all var(--transition-base);
}

.btn-submit:hover {
    background: var(--color-primary-dark);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn-submit svg {
    width: 20px;
    height: 20px;
}

/* App Footer */
.app-footer {
    background: white;
    border-top: 1px solid var(--color-border);
    padding: 1.5rem 2rem;
    margin-top: auto;
}

.app-footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.app-footer-content p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.footer-links-inline {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: var(--font-size-sm);
}

.footer-links-inline a {
    color: var(--color-text-secondary);
}

.footer-links-inline a:hover {
    color: var(--color-primary);
}

.footer-links-inline span {
    color: var(--color-border);
}

/* ===================================
   RESPONSIVE DESIGN
   =================================== */

@media (max-width: 1024px) {
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .about-content {
        grid-template-columns: 1fr;
    }
    
    .footer-container {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}

@media (max-width: 768px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform var(--transition-base);
    }
    
    .sidebar.active {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
    }
    
    .menu-toggle {
        display: flex;
    }
    
    .nav-links {
        gap: 1rem;
    }
    
    .nav-links a:not(.btn-primary) {
        display: none;
    }
    
    .hero {
        padding: 6rem 1.5rem 4rem;
    }
    
    .hero-title {
        font-size: var(--font-size-3xl);
    }
    
    .hero-subtitle {
        font-size: var(--font-size-lg);
    }
    
    .hero-cta {
        flex-direction: column;
    }
    
    .section-container {
        padding: 3rem 1.5rem;
    }
    
    .section-title {
        font-size: var(--font-size-3xl);
    }
    
    .features-grid {
        grid-template-columns: 1fr;
    }
    
    .balance-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .stat-divider {
        display: none;
    }
    
    .dashboard-container {
        padding: 1rem;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .footer-badges {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .app-footer-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .balance-amount {
        font-size: var(--font-size-4xl);
    }
    
    .stat-value {
        font-size: var(--font-size-xl);
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .audience-grid {
        grid-template-columns: 1fr;
    }
    
    .philosophy-principles {
        grid-template-columns: 1fr;
    }
}

/* ===================================
   PAGE-SPECIFIC STYLES
   =================================== */

/* Transactions Page Styles */
.transactions-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.summary-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.summary-card:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-md);
}

.summary-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.income-summary .summary-icon {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-success);
}

.expense-summary .summary-icon {
    background: rgba(239, 68, 68, 0.1);
    color: var(--color-danger);
}

.balance-summary .summary-icon {
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-primary);
}

.summary-icon svg {
    width: 24px;
    height: 24px;
}

.summary-content {
    flex: 1;
}

.summary-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin-bottom: 0.25rem;
}

.summary-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: 0.25rem;
}

.income-summary .summary-value {
    color: var(--color-success);
}

.expense-summary .summary-value {
    color: var(--color-danger);
}

.balance-summary .summary-value {
    color: var(--color-primary);
}

.summary-count {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}

.transactions-filters {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.filter-left {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
    flex: 1;
}

.search-box {
    position: relative;
    flex: 1;
    max-width: 300px;
}

.search-box svg {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    color: var(--color-text-tertiary);
}

.search-box input {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 3rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    transition: all var(--transition-fast);
}

.search-box input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.filter-dropdown {
    min-width: 150px;
}

.filter-select {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    background: white;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.filter-select:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.filter-right {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.transactions-list-container {
    margin-bottom: 2rem;
}

.transactions-list {
    max-height: 600px;
    overflow-y: auto;
}

.transaction-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    border-radius: var(--radius-md);
    margin-bottom: 0.75rem;
    background: var(--color-bg-secondary);
    transition: all var(--transition-fast);
    position: relative;
}

.transaction-item:hover {
    background: var(--color-bg-tertiary);
}

.transaction-item.income {
    border-left: 4px solid var(--color-success);
}

.transaction-item.expense {
    border-left: 4px solid var(--color-danger);
}

.transaction-info {
    flex: 1;
}

.transaction-description {
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.25rem;
}

.transaction-date {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}

.transaction-amount {
    font-weight: 700;
    font-size: var(--font-size-lg);
}

.income-amount {
    color: var(--color-success);
}

.expense-amount {
    color: var(--color-danger);
}

.transaction-delete {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    background: var(--color-danger);
    color: white;
    opacity: 0;
    transition: opacity var(--transition-fast);
    cursor: pointer;
}

.transaction-delete svg {
    width: 16px;
    height: 16px;
}

.transaction-item:hover .transaction-delete {
    opacity: 1;
}

.empty-state-container {
    text-align: center;
    padding: 4rem 2rem;
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    background: white;
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
}

.empty-state svg {
    width: 64px;
    height: 64px;
    color: var(--color-text-tertiary);
    margin-bottom: 1.5rem;
}

.empty-state h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.75rem;
}

.empty-state p {
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}

.modal {
    background: white;
    border-radius: var(--radius-xl);
    width: 90%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: var(--shadow-xl);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem;
    border-bottom: 1px solid var(--color-border);
}

.modal-header h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--color-text);
}

.modal-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text);
}

.modal-close svg {
    width: 20px;
    height: 20px;
}

.modal-body {
    padding: 1.5rem;
}

/* Export Page Styles */
.export-overview {
    margin-bottom: 2rem;
}

.overview-header {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.overview-icon {
    width: 64px;
    height: 64px;
    background: var(--color-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.overview-icon svg {
    width: 32px;
    height: 32px;
    color: white;
}

.overview-header h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.overview-header p {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.data-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.stat-card {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1.5rem;
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
}

.stat-icon {
    width: 48px;
    height: 48px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.stat-icon svg {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
}

.stat-info {
    flex: 1;
}

.stat-value {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.25rem;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.export-options {
    margin-bottom: 2rem;
}

.format-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}

.format-card {
    padding: 2rem;
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.format-card:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.format-header {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.format-icon {
    width: 48px;
    height: 48px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.format-icon svg {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
}

.format-header h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.format-header p {
    color: var(--color-text-secondary);
    line-height: 1.6;
    font-size: var(--font-size-sm);
}

.export-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.export-history {
    margin-bottom: 2rem;
}

.history-list {
    max-height: 300px;
    overflow-y: auto;
}

.history-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    border-bottom: 1px solid var(--color-border-light);
}

.history-item:last-child {
    border-bottom: none;
}

.history-info {
    flex: 1;
}

.history-format {
    font-size: var(--font-size-sm);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.25rem;
}

.history-date {
    font-size: var(--font-size-xs);
    color: var(--color-text-tertiary);
}

.history-size {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
}

.empty-history {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem;
    text-align: center;
}

.empty-history svg {
    width: 48px;
    height: 48px;
    color: var(--color-text-tertiary);
    margin-bottom: 1rem;
}

.empty-history p {
    color: var(--color-text-secondary);
}

.data-preview {
    margin-bottom: 2rem;
}

.preview-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.preview-container {
    max-height: 400px;
    overflow-y: auto;
}

.preview-code {
    background: var(--color-gray-900);
    color: var(--color-gray-100);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: var(--font-size-sm);
    line-height: 1.6;
    white-space: pre-wrap;
    word-break: break-all;
}

.import-section {
    margin-bottom: 2rem;
}

.upload-zone {
    border: 2px dashed var(--color-border);
    border-radius: var(--radius-lg);
    padding: 3rem;
    text-align: center;
    transition: all var(--transition-base);
    cursor: pointer;
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--color-primary);
    background: var(--color-bg-secondary);
}

.upload-icon {
    width: 64px;
    height: 64px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.upload-icon svg {
    width: 32px;
    height: 32px;
    color: var(--color-primary);
}

.upload-zone h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

.upload-zone p {
    color: var(--color-text-secondary);
    margin-bottom: 1.5rem;
}

/* Privacy Page Styles */
.privacy-content {
    max-width: 800px;
    margin: 0 auto;
}

.privacy-header {
    text-align: center;
    margin-bottom: 3rem;
}

.privacy-icon {
    width: 80px;
    height: 80px;
    background: var(--color-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
}

.privacy-icon svg {
    width: 40px;
    height: 40px;
    color: white;
}

.privacy-header h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 1rem;
}

.privacy-header p {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.privacy-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.privacy-card {
    padding: 2rem;
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-base);
}

.privacy-card:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.privacy-card-icon {
    width: 48px;
    height: 48px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.privacy-card-icon svg {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
}

.privacy-card h3 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

.privacy-card p {
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.privacy-details {
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    margin-bottom: 3rem;
}

.privacy-details h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--color-text);
}

.detail-section {
    margin-bottom: 2rem;
}

.detail-section:last-child {
    margin-bottom: 0;
}

.detail-section h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.detail-section p {
    color: var(--color-text-secondary);
    margin-bottom: 1rem;
    line-height: 1.6;
}

.detail-section ul {
    list-style: none;
    padding: 0;
}

.detail-section li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.detail-section li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--color-primary);
    font-weight: bold;
}

.privacy-cta {
    text-align: center;
    padding: 3rem 2rem;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
}

.privacy-cta h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.privacy-cta p {
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
}

/* Help Page Styles */
.help-content {
    max-width: 900px;
    margin: 0 auto;
}

.help-header {
    text-align: center;
    margin-bottom: 3rem;
}

.help-icon {
    width: 80px;
    height: 80px;
    background: var(--color-primary);
    border-radius: var(--radius-xl);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 2rem;
}

.help-icon svg {
    width: 40px;
    height: 40px;
    color: white;
}

.help-header h2 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 1rem;
}

.help-header p {
    font-size: var(--font-size-lg);
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.help-search {
    margin-bottom: 3rem;
}

.search-input-wrapper {
    position: relative;
    max-width: 500px;
    margin: 0 auto;
}

.search-input-wrapper svg {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    width: 20px;
    height: 20px;
    color: var(--color-text-tertiary);
}

.search-input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    font-size: var(--font-size-base);
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.help-categories {
    margin-bottom: 3rem;
}

.category-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.category-card {
    padding: 2rem;
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    text-align: center;
    transition: all var(--transition-base);
    cursor: pointer;
}

.category-card:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-lg);
    transform: translateY(-2px);
}

.category-icon {
    width: 48px;
    height: 48px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 1.5rem;
}

.category-icon svg {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
}

.category-card h3 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

.category-card p {
    color: var(--color-text-secondary);
    line-height: 1.6;
    font-size: var(--font-size-sm);
}

.faq-section {
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 2rem;
    margin-bottom: 3rem;
}

.faq-section h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: 2rem;
    color: var(--color-text);
}

.faq-item {
    border-bottom: 1px solid var(--color-border-light);
    padding: 1.5rem 0;
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.faq-question h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--color-text);
    flex: 1;
}

.faq-question svg {
    width: 20px;
    height: 20px;
    color: var(--color-text-secondary);
    transition: transform var(--transition-fast);
}

.faq-item.active .faq-question svg {
    transform: rotate(180deg);
}

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height var(--transition-base);
}

.faq-item.active .faq-answer {
    max-height: 500px;
}

.faq-answer p {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 1rem;
}

.faq-answer ol, .faq-answer ul {
    margin-left: 1.5rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

.faq-answer li {
    margin-bottom: 0.5rem;
}

.help-contact {
    text-align: center;
    padding: 3rem 2rem;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
}

.help-contact h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--color-text);
}

.help-contact p {
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.contact-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.contact-actions .btn-primary,
.contact-actions .btn-secondary {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.contact-actions svg {
    width: 20px;
    height: 20px;
}

/* About Page Styles */
.about-page-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-hero {
    text-align: center;
    margin-bottom: 4rem;
}

.about-hero-text h2 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--color-text);
    line-height: 1.2;
}

.about-hero-text p {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.about-hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    max-width: 600px;
    margin: 0 auto;
}

.stat-item {
    text-align: center;
}

.stat-number {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.about-sections {
    display: flex;
    flex-direction: column;
    gap: 3rem;
}

.about-section {
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 2.5rem;
}

.about-section h3 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--color-text);
}

.about-section p {
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 1.5rem;
}

.about-section p:last-child {
    margin-bottom: 0;
}

.essentials-list {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 2rem;
}

.essential-item {
    display: flex;
    gap: 1.5rem;
    align-items: flex-start;
}

.essential-icon {
    width: 48px;
    height: 48px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.essential-icon svg {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
}

.essential-item h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.essential-item p {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

.design-principles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.principle-card {
    padding: 1.5rem;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
}

.principle-card h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

.principle-card p {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

.privacy-features {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    margin-top: 2rem;
}

.privacy-feature {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
}

.privacy-feature svg {
    width: 24px;
    height: 24px;
    color: var(--color-primary);
    flex-shrink: 0;
}

.privacy-feature span {
    color: var(--color-text);
    font-weight: 500;
}

.target-audience {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.audience-card {
    text-align: center;
    padding: 2rem 1.5rem;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-lg);
}

.audience-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.audience-card h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

.audience-card p {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

.roadmap {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 2rem;
}

.roadmap-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
}

.roadmap-icon {
    font-size: 1.5rem;
    width: 40px;
    height: 40px;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.roadmap-item h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--color-text);
}

.roadmap-item p {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

.roadmap-note {
    font-style: italic;
    color: var(--color-text-secondary);
    margin-top: 1rem;
    text-align: center;
}

.philosophy-quote {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    font-style: italic;
    color: var(--color-text);
    margin: 2rem 0;
    padding: 2rem;
    background: var(--color-bg-secondary);
    border-left: 4px solid var(--color-primary);
    border-radius: var(--radius-md);
    text-align: left;
}

.philosophy-values {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.value-item {
    text-align: center;
}

.value-item h4 {
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-primary);
}

.value-item p {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

.tech-stack {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.tech-item {
    padding: 1.5rem;
    background: var(--color-bg-secondary);
    border-radius: var(--radius-md);
}

.tech-item h4 {
    font-size: var(--font-size-lg);
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--color-text);
}

.tech-item p {
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin: 0;
}

.about-cta {
    text-align: center;
    padding: 3rem 2rem;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border-radius: var(--radius-lg);
    margin-top: 3rem;
}

.about-cta h3 {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    margin-bottom: 1rem;
    color: white;
}

.about-cta p {
    font-size: var(--font-size-lg);
    color: rgba(255, 255, 255, 0.9);
    margin-bottom: 2rem;
    line-height: 1.6;
}

.cta-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

.about-cta .btn-primary {
    background: white;
    color: var(--color-primary);
}

.about-cta .btn-primary:hover {
    background: var(--color-gray-100);
}

.about-cta .btn-secondary {
    background: transparent;
    color: white;
    border: 1px solid white;
}

.about-cta .btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* ===================================
   ANIMATIONS
   =================================== */

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.feature-card,
.audience-card,
.principle,
.privacy-card,
.category-card,
.about-section {
    animation: fadeIn 0.6s ease-out;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--color-bg-secondary);
}

::-webkit-scrollbar-thumb {
    background: var(--color-gray-300);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--color-gray-400);
}

/* Footer Creator Credit */
.footer-creator {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--color-gray-800);
    text-align: center;
}

.creator-info {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.creator-name {
    font-size: var(--font-size-sm);
    color: var(--color-gray-400);
    font-weight: 500;
}

.social-links {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.social-link {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 36px;
    height: 36px;
    border-radius: var(--radius-md);
    background: var(--color-gray-800);
    color: var(--color-gray-400);
    transition: all var(--transition-fast);
    text-decoration: none;
}

.social-link:hover {
    background: var(--color-primary);
    color: white;
    transform: translateY(-2px);
}

.social-link svg {
    width: 18px;
    height: 18px;
}

.contact-info {
    font-size: var(--font-size-xs);
    color: var(--color-gray-500);
    margin-top: 0.5rem;
}

.contact-info a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
}

.contact-info a:hover {
    color: var(--color-primary-light);
}

/* App footer specific styles */
.app-footer .footer-creator {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
}

.app-footer .creator-info {
    flex-direction: row;
    justify-content: space-between;
    align-items: center;
}

.app-footer .social-links {
    gap: 0.75rem;
}

.app-footer .social-link {
    width: 32px;
    height: 32px;
}

.app-footer .social-link svg {
    width: 16px;
    height: 16px;
}

.app-footer .contact-info {
    margin-top: 0;
    margin-left: 1rem;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .app-footer .creator-info {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    
    .app-footer .contact-info {
        margin-left: 0;
    }
}