/* ============================================
   One Step A Day - DSE智能學習助手
   "Academic Ascension" Design System
   ============================================ */

/* === CSS Variables === */
:root {
    /* Colors - Deep Navy & Sophisticated Grays */
    --color-navy-deep: #0A1628;
    --color-navy-dark: #162B4D;
    --color-charcoal: #1A1A1A;
    --color-gray-dark: #333333;
    --color-gray-mid: #666666;
    --color-gray-light: #999999;
    --color-gray-lighter: #CCCCCC;
    --color-gray-bg: #F8F9FA;
    --color-white: #FFFFFF;

    /* Brand Gradients */
    --gradient-primary: linear-gradient(135deg, #9C27B0 0%, #0066CC 100%);
    --gradient-secondary: linear-gradient(135deg, #0066CC 0%, #00BCD4 100%);
    --gradient-success: linear-gradient(135deg, #4CAF50 0%, #8BC34A 100%);
    --gradient-accent: linear-gradient(135deg, #FF9800 0%, #FFC107 100%);
    --gradient-hero: linear-gradient(135deg, #667EEA 0%, #764BA2 50%, #F093FB 100%);
    --gradient-bg: radial-gradient(ellipse at top, rgba(156, 39, 176, 0.15), transparent 50%),
        radial-gradient(ellipse at bottom, rgba(0, 102, 204, 0.1), transparent 50%);

    /* Accent Colors */
    --color-purple: #9C27B0;
    --color-blue: #0066CC;
    --color-cyan: #00BCD4;
    --color-green: #4CAF50;
    --color-orange: #FF9800;

    /* Typography */
    --font-serif: 'Noto Serif TC', serif;
    --font-sans: 'Noto Sans TC', sans-serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-2xl: 4rem;
    --spacing-3xl: 6rem;

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-xl: 32px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.16);
    --shadow-xl: 0 16px 64px rgba(0, 0, 0, 0.24);

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-base: 0.3s ease;
    --transition-slow: 0.5s ease;
}

/* === Reset & Base === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    color: var(--color-charcoal);
    background: var(--color-white);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* === Background Elements === */
.background-gradient {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-bg);
    z-index: -2;
    pointer-events: none;
}

.background-grid {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(0, 0, 0, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(0, 0, 0, 0.02) 1px, transparent 1px);
    background-size: 64px 64px;
    z-index: -1;
    pointer-events: none;
}

.floating-shapes {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    overflow: hidden;
    z-index: -1;
    pointer-events: none;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.05;
    animation: float 20s infinite ease-in-out;
}

.shape-1 {
    width: 400px;
    height: 400px;
    background: var(--gradient-primary);
    top: 10%;
    left: -100px;
    animation-delay: 0s;
}

.shape-2 {
    width: 300px;
    height: 300px;
    background: var(--gradient-secondary);
    top: 50%;
    right: -80px;
    animation-delay: 5s;
}

.shape-3 {
    width: 500px;
    height: 500px;
    background: var(--gradient-accent);
    bottom: -150px;
    left: 30%;
    animation-delay: 10s;
}

@keyframes float {

    0%,
    100% {
        transform: translate(0, 0) rotate(0deg);
    }

    25% {
        transform: translate(30px, -30px) rotate(5deg);
    }

    50% {
        transform: translate(-20px, -50px) rotate(-5deg);
    }

    75% {
        transform: translate(40px, -20px) rotate(3deg);
    }
}

/* === Navigation === */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
    z-index: 1000;
    transition: all var(--transition-base);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-family: var(--font-serif);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-charcoal);
}

.logo-icon {
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
    align-items: center;
}

.nav-link {
    text-decoration: none;
    color: var(--color-gray-dark);
    font-weight: 500;
    font-size: 0.95rem;
    transition: color var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--color-purple);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 2px;
    background: var(--gradient-primary);
    transform: scaleX(0);
    transition: transform var(--transition-base);
}

.nav-link:hover::after {
    transform: scaleX(1);
}

.nav-cta {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--gradient-primary);
    color: var(--color-white) !important;
    border-radius: var(--radius-sm);
    font-weight: 600;
}

.nav-cta::after {
    display: none;
}

.nav-cta:hover {
    color: var(--color-white) !important;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* === Hero Section === */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding: calc(80px + var(--spacing-3xl)) var(--spacing-lg) var(--spacing-3xl);
    position: relative;
}

.hero-container {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.hero-content {
    animation: fadeInUp 0.8s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(156, 39, 176, 0.1);
    border: 1px solid rgba(156, 39, 176, 0.2);
    border-radius: 100px;
    color: var(--color-purple);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-lg);
}

.badge-icon {
    font-size: 1.1rem;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: 4rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
}

.title-line {
    display: block;
}

.title-gradient {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.25rem;
    color: var(--color-gray-mid);
    line-height: 1.8;
    margin-bottom: var(--spacing-xl);
    font-weight: 400;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-xl);
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-sans);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    position: relative;
    overflow: hidden;
}

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

.btn-primary:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-lg);
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.2) 0%, transparent 100%);
    opacity: 0;
    transition: opacity var(--transition-base);
}

.btn-primary:hover::before {
    opacity: 1;
}

.btn-secondary {
    background: var(--color-white);
    color: var(--color-charcoal);
    border: 2px solid var(--color-gray-lighter);
    box-shadow: var(--shadow-sm);
}

.btn-secondary:hover {
    border-color: var(--color-purple);
    color: var(--color-purple);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-2xl);
    font-size: 1.1rem;
}

.btn-icon {
    font-size: 1.2rem;
    transition: transform var(--transition-base);
}

.btn:hover .btn-icon {
    transform: translateX(4px);
}

/* === Hero Stats === */
.hero-stats {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-number {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.85rem;
    color: var(--color-gray-mid);
    font-weight: 500;
}

.stat-divider {
    width: 1px;
    height: 40px;
    background: var(--color-gray-lighter);
}

/* === Phone Mockup === */
.hero-visual {
    display: flex;
    justify-content: center;
    align-items: center;
    animation: fadeIn 1s ease-out 0.3s both;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.phone-mockup {
    position: relative;
    animation: floatPhone 6s ease-in-out infinite;
}

@keyframes floatPhone {

    0%,
    100% {
        transform: translateY(0px) rotate(0deg);
    }

    50% {
        transform: translateY(-20px) rotate(2deg);
    }
}

.phone-frame {
    width: 300px;
    height: 600px;
    background: linear-gradient(145deg, #2c2c2c, #1a1a1a);
    border-radius: 40px;
    padding: 12px;
    box-shadow:
        0 20px 60px rgba(0, 0, 0, 0.3),
        0 0 0 1px rgba(255, 255, 255, 0.1) inset;
    position: relative;
}

.phone-frame::before {
    content: '';
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 100px;
    height: 25px;
    background: #1a1a1a;
    border-radius: 0 0 20px 20px;
    z-index: 10;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: var(--color-white);
    border-radius: 32px;
    overflow: hidden;
    position: relative;
}

.screen-content {
    width: 100%;
    height: 100%;
    padding: var(--spacing-md);
}

.app-preview {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-charcoal);
}

.preview-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    padding-top: var(--spacing-md);
}

.preview-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-charcoal);
}

.progress-circle {
    position: relative;
    width: 120px;
    height: 120px;
    margin: var(--spacing-md) auto;
}

.progress-circle svg {
    width: 100%;
    height: 100%;
    transform: rotate(-90deg);
}

.progress-bg {
    fill: none;
    stroke: var(--color-gray-lighter);
    stroke-width: 8;
}

.progress-fill {
    fill: none;
    stroke: url(#progressGradient);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 314.16;
    animation: progressAnimation 2s ease-out;
}

@keyframes progressAnimation {
    from {
        stroke-dashoffset: 314.16;
    }
}

.progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    text-align: center;
}

.progress-percent {
    display: block;
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.progress-label {
    display: block;
    font-size: 0.7rem;
    color: var(--color-gray-mid);
}

.preview-cards {
    display: flex;
    gap: var(--spacing-sm);
}

.mini-card {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: var(--spacing-sm);
    background: var(--color-gray-bg);
    border-radius: var(--radius-sm);
}

.mini-card-icon {
    font-size: 1.5rem;
}

.mini-card-text {
    font-size: 0.65rem;
    color: var(--color-gray-mid);
    font-weight: 500;
}

.mini-card-count {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-charcoal);
}

/* === Container === */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* === Section Header === */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
}

.section-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-md);
    background: rgba(0, 102, 204, 0.1);
    border: 1px solid rgba(0, 102, 204, 0.2);
    border-radius: 100px;
    color: var(--color-blue);
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: var(--spacing-md);
}

.section-title {
    font-family: var(--font-serif);
    font-size: 3rem;
    font-weight: 900;
    color: var(--color-charcoal);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.02em;
}

.section-description {
    font-size: 1.15rem;
    color: var(--color-gray-mid);
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.7;
}

/* === Features Section === */
.features {
    padding: var(--spacing-3xl) 0;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
    max-width: 1000px;
    margin: 0 auto;
}

.feature-card {
    padding: var(--spacing-xl);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(0, 0, 0, 0.05);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.feature-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.feature-icon {
    width: 64px;
    height: 64px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
}

.feature-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-charcoal);
    margin-bottom: var(--spacing-sm);
}

.feature-description {
    font-size: 1rem;
    color: var(--color-gray-mid);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.feature-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.feature-list li {
    font-size: 0.95rem;
    color: var(--color-gray-dark);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

/* === How It Works === */
.how-it-works {
    padding: var(--spacing-3xl) 0;
    background: var(--color-gray-bg);
}

.steps {
    max-width: 800px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-2xl);
}

.step {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: var(--spacing-xl);
    align-items: start;
}

.step-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.step-circle {
    width: 80px;
    height: 80px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
    position: relative;
    z-index: 1;
}

.step-number {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 900;
    color: var(--color-white);
}

.step-line {
    width: 2px;
    height: 80px;
    background: linear-gradient(to bottom, var(--color-purple), transparent);
    margin-top: var(--spacing-sm);
}

.step:last-child .step-line {
    display: none;
}

.step-content {
    padding-top: var(--spacing-sm);
}

.step-title {
    font-family: var(--font-serif);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--color-charcoal);
    margin-bottom: var(--spacing-sm);
}

.step-description {
    font-size: 1.1rem;
    color: var(--color-gray-mid);
    line-height: 1.7;
}

/* === Subjects Section === */
.subjects {
    padding: var(--spacing-3xl) 0;
}

.subjects-grid {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-md);
    justify-content: center;
}

.subject-tag {
    padding: var(--spacing-md) var(--spacing-lg);
    background: var(--color-white);
    border: 2px solid var(--tag-color);
    border-radius: 100px;
    color: var(--tag-color);
    font-weight: 600;
    font-size: 1rem;
    transition: all var(--transition-base);
    cursor: pointer;
}

.subject-tag:hover {
    background: var(--tag-color);
    color: var(--color-white);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

/* === Testimonials === */
.testimonials {
    padding: var(--spacing-3xl) 0;
    background: var(--color-gray-bg);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-xl);
}

.testimonial-card {
    padding: var(--spacing-xl);
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    transition: all var(--transition-base);
}

.testimonial-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.testimonial-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.testimonial-avatar {
    width: 50px;
    height: 50px;
    background: var(--gradient-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-white);
}

.testimonial-name {
    font-family: var(--font-serif);
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-charcoal);
    margin-bottom: 2px;
}

.testimonial-school {
    font-size: 0.9rem;
    color: var(--color-gray-mid);
}

.testimonial-text {
    font-size: 1rem;
    color: var(--color-gray-dark);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.testimonial-rating {
    font-size: 1.1rem;
}

/* === CTA Section === */
.cta-section {
    padding: var(--spacing-3xl) 0;
    background: var(--color-navy-deep);
    position: relative;
    overflow: hidden;
}

.cta-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: grid;
    grid-template-columns: 1.5fr 1fr;
    gap: var(--spacing-3xl);
    align-items: center;
}

.cta-title {
    font-family: var(--font-serif);
    font-size: 3.5rem;
    font-weight: 900;
    line-height: 1.1;
    margin-bottom: var(--spacing-lg);
    letter-spacing: -0.02em;
}

.cta-line {
    display: block;
    color: var(--color-white);
}

.cta-gradient {
    background: linear-gradient(135deg, #00BCD4 0%, #4CAF50 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.cta-description {
    font-size: 1.2rem;
    color: rgba(255, 255, 255, 0.8);
    line-height: 1.7;
    margin-bottom: var(--spacing-xl);
}

.cta-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.cta-note {
    font-size: 0.95rem;
    color: rgba(255, 255, 255, 0.6);
}

.cta-visual {
    position: relative;
    height: 400px;
}

.floating-elements {
    position: relative;
    width: 100%;
    height: 100%;
}

.float-icon {
    position: absolute;
    font-size: 4rem;
    animation: floatIcon 4s ease-in-out infinite;
}

.float-icon:nth-child(1) {
    top: 10%;
    left: 20%;
}

.float-icon:nth-child(2) {
    top: 30%;
    right: 20%;
}

.float-icon:nth-child(3) {
    top: 50%;
    left: 30%;
}

.float-icon:nth-child(4) {
    bottom: 30%;
    right: 30%;
}

.float-icon:nth-child(5) {
    bottom: 10%;
    left: 40%;
}

@keyframes floatIcon {

    0%,
    100% {
        transform: translateY(0px);
    }

    50% {
        transform: translateY(-30px);
    }
}

/* === Footer === */
.footer {
    background: var(--color-charcoal);
    color: var(--color-white);
    padding: var(--spacing-3xl) 0 var(--spacing-lg);
}

.footer-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.footer-main {
    display: grid;
    grid-template-columns: 1.5fr 2fr;
    gap: var(--spacing-3xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    margin-bottom: var(--spacing-lg);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-family: var(--font-serif);
    font-weight: 700;
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

.footer-tagline {
    color: rgba(255, 255, 255, 0.6);
    font-size: 0.95rem;
    line-height: 1.6;
}

.footer-links {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-xl);
}

.footer-heading {
    font-family: var(--font-serif);
    font-size: 1rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    color: var(--color-white);
}

.footer-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-list a {
    text-decoration: none;
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.9rem;
    transition: color var(--transition-fast);
}

.footer-list a:hover {
    color: var(--color-white);
}

.footer-bottom {
    text-align: center;
}

.footer-copyright {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.9rem;
}

/* === Animations === */
[data-aos] {
    opacity: 0;
    transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-aos].aos-animate {
    opacity: 1;
}

[data-aos="fade-up"] {
    transform: translateY(30px);
}

[data-aos="fade-up"].aos-animate {
    transform: translateY(0);
}

[data-aos="fade-right"] {
    transform: translateX(-30px);
}

[data-aos="fade-right"].aos-animate {
    transform: translateX(0);
}

[data-aos="fade-left"] {
    transform: translateX(30px);
}

[data-aos="fade-left"].aos-animate {
    transform: translateX(0);
}

[data-aos="zoom-in"] {
    transform: scale(0.9);
}

[data-aos="zoom-in"].aos-animate {
    transform: scale(1);
}

/* === Responsive === */
@media (max-width: 968px) {

    .hero-container,
    .cta-container {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
    }

    .hero-visual {
        order: -1;
    }

    .hero-title,
    .cta-title {
        font-size: 2.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .nav-menu {
        display: none;
    }

    .footer-main {
        grid-template-columns: 1fr;
    }

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

    .step {
        grid-template-columns: 80px 1fr;
        gap: var(--spacing-md);
    }

    .step-circle {
        width: 60px;
        height: 60px;
    }

    .step-number {
        font-size: 1.5rem;
    }
}

@media (max-width: 640px) {
    .hero-title {
        font-size: 2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .hero-cta {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .stat-divider {
        width: 100%;
        height: 1px;
    }

    .features-grid,
    .testimonials-grid {
        grid-template-columns: 1fr;
    }

    .cta-title {
        font-size: 2rem;
    }

    .cta-buttons .btn {
        width: 100%;
    }

    .footer-links {
        grid-template-columns: 1fr;
    }
}