/* ========================================
   Cal AI Landing Page Styles
   Design System: iOS-Inspired Clean Design
   ======================================== */

/* ===== CSS Variables ===== */
:root {
    /* Colors from Cal AI Design System */
    --color-primary: #007AFF;
    --color-primary-light: #5AC8FA;
    --color-primary-dark: #0051D5;
    --color-accent: #FF6B6B;
    --color-success: #34C759;
    --color-warning: #FF9500;
    --color-error: #FF3B30;
   
    /* Neutral Colors */
    --color-text-primary: #1C1C1E;
    --color-text-secondary: #8E8E93;
    --color-surface: #F2F2F7;
    --color-background: #FFFFFF;
    --color-border: #E5E5EA;
   
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #007AFF 0%, #5AC8FA 100%);
    --gradient-accent: linear-gradient(135deg, #FF6B6B 0%, #FF9500 100%);
   
    /* Spacing (8px base unit) */
    --space-4: 4px;
    --space-8: 8px;
    --space-12: 12px;
    --space-16: 16px;
    --space-20: 20px;
    --space-24: 24px;
    --space-32: 32px;
    --space-40: 40px;
    --space-48: 48px;
    --space-64: 64px;
    --space-80: 80px;
    --space-96: 96px;
   
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
   
    /* Shadows */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.07);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
   
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;
   
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    color: var(--color-text-primary);
    background-color: var(--color-background);
    line-height: 1.6;
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
}

a {
    text-decoration: none;
    color: inherit;
}

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

/* ===== Container ===== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-24);
}

@media (max-width: 768px) {
    .container {
        padding: 0 var(--space-16);
    }
}

/* ===== Navigation ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    padding: var(--space-16) 0;
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-12);
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text-primary);
}

.logo-img {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-md);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-32);
}

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

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

.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    gap: 6px;
    padding: var(--space-8);
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--transition-fast);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: white;
    padding: var(--space-24);
    flex-direction: column;
    gap: var(--space-16);
    border-bottom: 1px solid var(--color-border);
    z-index: 999;
}

.mobile-menu.active {
    display: flex;
}

@media (max-width: 768px) {
    .nav-links {
        display: none;
    }
   
    .mobile-menu-toggle {
        display: flex;
    }
}

/* ===== Buttons ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-8);
    padding: var(--space-12) var(--space-24);
    border-radius: var(--radius-full);
    font-weight: 600;
    font-size: 14px;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

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

.btn-primary:hover {
    background: var(--color-primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--color-surface);
    color: var(--color-text-primary);
}

.btn-secondary:hover {
    background: var(--color-border);
    transform: translateY(-2px);
}

.btn-large {
    padding: var(--space-16) var(--space-32);
    font-size: 16px;
}

.btn-block {
    width: 100%;
}

/* ===== Hero Section ===== */
.hero {
    padding-top: 120px;
    padding-bottom: var(--space-96);
    background: linear-gradient(180deg, var(--color-surface) 0%, var(--color-background) 100%);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-64);
    align-items: center;
}

.hero-text {
    display: flex;
    flex-direction: column;
    gap: var(--space-24);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-8);
    padding: var(--space-8) var(--space-16);
    background: white;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    width: fit-content;
    font-size: 14px;
    color: var(--color-text-secondary);
}

.badge-icon {
    font-size: 16px;
}

.hero-title {
    font-size: 56px;
    font-weight: 800;
    line-height: 1.1;
    color: var(--color-text-primary);
}

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

.hero-description {
    font-size: 18px;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: var(--space-16);
    margin-top: var(--space-16);
}

.hero-stats {
    display: flex;
    gap: var(--space-48);
    margin-top: var(--space-32);
    padding-top: var(--space-32);
    border-top: 1px solid var(--color-border);
}

.stat {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.stat-value {
    font-size: 32px;
    font-weight: 700;
    color: var(--color-primary);
}

.stat-label {
    font-size: 14px;
    color: var(--color-text-secondary);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.phone-mockup {
    position: relative;
    z-index: 2;
}

.phone-frame {
    width: 300px;
    height: 600px;
    background: var(--color-text-primary);
    border-radius: 40px;
    padding: 12px;
    box-shadow: var(--shadow-xl);
    position: relative;
}

.phone-notch {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 120px;
    height: 30px;
    background: var(--color-text-primary);
    border-radius: 0 0 20px 20px;
    z-index: 3;
}

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

/* App Screenshot in Phone */
.app-screenshot {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
    border-radius: 32px;
}

/* Floating Cards */
.floating-card {
    position: absolute;
    animation: float 3s ease-in-out infinite;
}

.card-1 {
    top: 10%;
    right: -20%;
    animation-delay: 0s;
}

.card-2 {
    bottom: 15%;
    left: -15%;
    animation-delay: 1.5s;
}

.mini-card {
    background: white;
    padding: var(--space-16);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    display: flex;
    align-items: center;
    gap: var(--space-12);
    min-width: 200px;
}

.mini-icon {
    font-size: 32px;
}

.mini-title {
    font-weight: 600;
    color: var(--color-text-primary);
}

.mini-subtitle {
    font-size: 14px;
    color: var(--color-text-secondary);
}

@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-20px);
    }
}

@media (max-width: 768px) {
    .hero {
        padding-top: 100px;
        padding-bottom: var(--space-64);
    }
   
    .hero-content {
        grid-template-columns: 1fr;
        gap: var(--space-48);
    }
   
    .hero-title {
        font-size: 36px;
    }
   
    .hero-cta {
        flex-direction: column;
    }
   
    .hero-stats {
        gap: var(--space-32);
    }
   
    .stat-value {
        font-size: 24px;
    }
   
    .hero-visual {
        max-width: 400px;
        margin: 0 auto;
    }

    .phone-frame {
        width: 280px;
        height: 560px;
    }

    .floating-card {
        display: none;
    }
}

@media (max-width: 480px) {
    .phone-frame {
        width: 240px;
        height: 480px;
    }
}

/* ===== Section Styles ===== */
section {
    padding: var(--space-96) 0;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto var(--space-64);
}

.section-title {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: var(--space-16);
    color: var(--color-text-primary);
}

.section-description {
    font-size: 18px;
    color: var(--color-text-secondary);
    line-height: 1.8;
}

@media (max-width: 768px) {
    section {
        padding: var(--space-64) 0;
    }
   
    .section-title {
        font-size: 32px;
    }
   
    .section-header {
        margin-bottom: var(--space-48);
    }
}

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

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-32);
}

.feature-card {
    background: white;
    padding: var(--space-32);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
}

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

.feature-icon {
    font-size: 48px;
    margin-bottom: var(--space-16);
}

.feature-title {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: var(--space-12);
    color: var(--color-text-primary);
}

.feature-description {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

@media (max-width: 1024px) {
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== How It Works Section ===== */
.how-it-works {
    background: linear-gradient(180deg, var(--color-background) 0%, var(--color-surface) 100%);
    padding: var(--space-96) 0;
    position: relative;
}

.steps-timeline {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    gap: var(--space-24);
}

.step-card {
    background: white;
    border-radius: var(--radius-xl);
    padding: var(--space-48);
    box-shadow: var(--shadow-lg);
    position: relative;
    transition: all var(--transition-base);
}

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

.step-badge {
    position: absolute;
    top: var(--space-32);
    left: var(--space-32);
    width: 60px;
    height: 60px;
    background: var(--gradient-primary);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    z-index: 2;
}

.step-number {
    font-size: 28px;
    font-weight: 700;
    color: white;
}

.step-content-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-48);
    align-items: center;
}

.step-card-reverse .step-content-wrapper {
    direction: rtl;
}

.step-card-reverse .step-text,
.step-card-reverse .step-visual {
    direction: ltr;
}

.step-text {
    display: flex;
    flex-direction: column;
    gap: var(--space-16);
    padding-left: var(--space-64);
}

.step-icon-inline {
    font-size: 48px;
    margin-bottom: var(--space-8);
}

.step-title {
    font-size: 28px;
    font-weight: 700;
    color: var(--color-text-primary);
    margin: 0;
}

.step-description {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin: 0;
}

.step-features {
    list-style: none;
    padding: 0;
    margin: var(--space-16) 0 0;
    display: flex;
    flex-direction: column;
    gap: var(--space-12);
}

.step-features li {
    font-size: 15px;
    color: var(--color-text-primary);
    display: flex;
    align-items: center;
    gap: var(--space-8);
}

.step-features li::before {
    content: "✓";
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    background: var(--color-success);
    color: white;
    border-radius: var(--radius-full);
    font-weight: 700;
    font-size: 14px;
    flex-shrink: 0;
}

.step-visual {
    display: flex;
    justify-content: center;
    align-items: center;
}

.step-visual .phone-mockup {
    width: 280px;
    border-radius: 24px;
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    background: white;
    border: 8px solid #1a1a1a;
    transition: all var(--transition-base);
}

.step-card:hover .phone-mockup {
    transform: scale(1.05);
}

.phone-mockup img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
}

.step-connector {
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--color-primary);
    opacity: 0.3;
}

.how-it-works-cta {
    margin-top: var(--space-64);
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: var(--space-16);
    align-items: center;
}

.btn-large {
    padding: var(--space-20) var(--space-48);
    font-size: 18px;
    display: inline-flex;
    align-items: center;
    gap: var(--space-12);
}

.cta-subtext {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin: 0;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .step-visual .phone-mockup {
        width: 240px;
    }

    .step-text {
        padding-left: var(--space-48);
    }
}

@media (max-width: 768px) {
    .how-it-works {
        padding: var(--space-64) 0;
    }

    .step-card {
        padding: var(--space-32);
    }

    .step-badge {
        top: var(--space-24);
        left: var(--space-24);
        width: 50px;
        height: 50px;
    }

    .step-number {
        font-size: 24px;
    }

    .step-content-wrapper,
    .step-card-reverse .step-content-wrapper {
        grid-template-columns: 1fr;
        direction: ltr;
        gap: var(--space-32);
    }

    .step-text {
        padding-left: 0;
        text-align: center;
        align-items: center;
    }

    .step-title {
        font-size: 24px;
    }

    .step-description {
        font-size: 15px;
    }

    .step-features {
        align-items: flex-start;
        max-width: 300px;
    }

    .step-visual .phone-mockup {
        width: 220px;
    }

    .step-connector {
        opacity: 0.2;
    }

    .btn-large {
        padding: var(--space-16) var(--space-32);
        font-size: 16px;
    }
}

@media (max-width: 480px) {
    .step-card {
        padding: var(--space-24);
    }

    .step-icon-inline {
        font-size: 36px;
    }

    .step-title {
        font-size: 20px;
    }

    .step-visual .phone-mockup {
        width: 180px;
    }
}

/* ===== Screenshots Gallery Section ===== */
.screenshots-gallery {
    background: var(--color-surface);
    padding: var(--space-96) 0;
    overflow: hidden;
}

.screenshots-gallery .section-header {
    margin-bottom: var(--space-48);
    text-align: center;
}

.screenshots-scroll-container {
    position: relative;
    width: 100%;
    margin: 0 auto;
}

.screenshots-scroll {
    display: flex;
    gap: var(--space-24);
    overflow-x: auto;
    overflow-y: hidden;
    scroll-behavior: smooth;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding: var(--space-24) var(--space-24);
    cursor: grab;
}

.screenshots-scroll:active {
    cursor: grabbing;
}

/* Hide scrollbar but keep functionality */
.screenshots-scroll::-webkit-scrollbar {
    height: 8px;
}

.screenshots-scroll::-webkit-scrollbar-track {
    background: transparent;
}

.screenshots-scroll::-webkit-scrollbar-thumb {
    background: var(--color-border);
    border-radius: 4px;
}

.screenshots-scroll::-webkit-scrollbar-thumb:hover {
    background: var(--color-text-secondary);
}

.screenshot-card {
    flex: 0 0 280px;
    scroll-snap-align: center;
    display: flex;
    flex-direction: column;
    gap: var(--space-16);
}

.screenshot-frame {
    background: white;
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    transition: all var(--transition-base);
    position: relative;
}

.screenshot-frame:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
}

.screenshot-frame img {
    width: 100%;
    height: auto;
    display: block;
    object-fit: cover;
    aspect-ratio: 9 / 16;
}

.screenshot-title {
    font-size: 16px;
    font-weight: 600;
    color: var(--color-text-primary);
    text-align: center;
    margin: 0;
}

.scroll-hint {
    text-align: center;
    margin-top: var(--space-32);
    opacity: 0.6;
    font-size: 14px;
    color: var(--color-text-secondary);
}

.scroll-hint span {
    display: inline-flex;
    align-items: center;
    gap: var(--space-8);
    padding: var(--space-8) var(--space-16);
    background: white;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-sm);
}

/* Responsive Design */
@media (max-width: 1024px) {
    .screenshot-card {
        flex: 0 0 240px;
    }
}

@media (max-width: 768px) {
    .screenshots-gallery {
        padding: var(--space-64) 0;
    }

    .screenshots-scroll {
        padding: var(--space-16) var(--space-16);
        gap: var(--space-16);
    }

    .screenshot-card {
        flex: 0 0 200px;
    }

    .screenshot-title {
        font-size: 14px;
    }

    .scroll-hint {
        font-size: 12px;
        margin-top: var(--space-24);
    }
}

@media (max-width: 480px) {
    .screenshot-card {
        flex: 0 0 180px;
    }

    .screenshot-title {
        font-size: 13px;
    }
}

/* ===== Benefits Section ===== */
.benefits {
    background: var(--color-background);
}

.benefits-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-64);
    align-items: center;
}

.benefits-title {
    font-size: 40px;
    font-weight: 800;
    margin-bottom: var(--space-32);
    color: var(--color-text-primary);
}

.benefits-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-24);
}

.benefit-item {
    display: flex;
    gap: var(--space-16);
}

.check-icon {
    flex-shrink: 0;
    color: var(--color-success);
    margin-top: 4px;
}

.benefit-item h4 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: var(--space-4);
    color: var(--color-text-primary);
}

.benefit-item p {
    font-size: 15px;
    color: var(--color-text-secondary);
    line-height: 1.6;
}

/* Stats Card */
.stats-card {
    background: white;
    padding: var(--space-32);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-xl);
}

.stats-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--space-24);
}

.stats-header h4 {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text-primary);
}

.stats-period {
    font-size: 14px;
    color: var(--color-text-secondary);
}

.stats-chart {
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    gap: var(--space-8);
    height: 200px;
    margin-bottom: var(--space-24);
}

.chart-bar {
    flex: 1;
    background: var(--gradient-primary);
    border-radius: var(--radius-sm) var(--radius-sm) 0 0;
    min-height: 20px;
    transition: all var(--transition-base);
}

.chart-bar:hover {
    opacity: 0.8;
}

.stats-footer {
    display: flex;
    justify-content: space-around;
    padding-top: var(--space-24);
    border-top: 1px solid var(--color-border);
}

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

.stats-value {
    display: block;
    font-size: 24px;
    font-weight: 700;
    color: var(--color-primary);
    margin-bottom: var(--space-4);
}

.stats-label {
    font-size: 14px;
    color: var(--color-text-secondary);
}

@media (max-width: 768px) {
    .benefits-wrapper {
        grid-template-columns: 1fr;
    }
   
    .benefits-title {
        font-size: 32px;
    }
}

/* ===== Pricing Section ===== */
.pricing {
    background: var(--color-surface);
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-32);
    max-width: 1100px;
    margin: 0 auto;
}

.pricing-card {
    background: white;
    padding: var(--space-40);
    border-radius: var(--radius-xl);
    border: 2px solid var(--color-border);
    position: relative;
    display: flex;
    flex-direction: column;
    transition: all var(--transition-base);
}

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

.pricing-featured {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-lg);
}

.featured-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--gradient-primary);
    color: white;
    padding: var(--space-8) var(--space-20);
    border-radius: var(--radius-full);
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.pricing-plan {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: var(--space-24);
    color: var(--color-text-primary);
}

.pricing-price {
    margin-bottom: var(--space-32);
}

.price-amount {
    font-size: 48px;
    font-weight: 800;
    color: var(--color-text-primary);
}

.price-period {
    font-size: 16px;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.pricing-features {
    list-style: none;
    margin-bottom: var(--space-32);
    flex-grow: 1;
}

.pricing-features li {
    padding: var(--space-12) 0;
    font-size: 15px;
    color: var(--color-text-primary);
}

.pricing-features li.disabled {
    color: var(--color-text-secondary);
    opacity: 0.5;
}

@media (max-width: 1024px) {
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 400px;
    }
}

/* ===== Testimonials Section ===== */
.testimonials {
    background: var(--color-background);
}

.testimonials-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-32);
}

.testimonial-card {
    background: white;
    padding: var(--space-32);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    gap: var(--space-20);
}

.stars {
    color: #FFB800;
    font-size: 20px;
    letter-spacing: 2px;
}

.testimonial-text {
    font-size: 16px;
    line-height: 1.7;
    color: var(--color-text-primary);
    flex-grow: 1;
}

.testimonial-author {
    display: flex;
    align-items: center;
    gap: var(--space-12);
    padding-top: var(--space-16);
    border-top: 1px solid var(--color-border);
}

.author-avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    background: var(--gradient-primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 16px;
}

.author-name {
    font-weight: 600;
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
}

.author-title {
    font-size: 14px;
    color: var(--color-text-secondary);
}

@media (max-width: 1024px) {
    .testimonials-grid {
        grid-template-columns: 1fr;
    }
}

/* ===== Download Section ===== */
.download {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: white;
}

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

.download-title {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: var(--space-16);
}

.download-description {
    font-size: 18px;
    opacity: 0.95;
    margin-bottom: var(--space-48);
    line-height: 1.7;
}

.download-buttons {
    display: flex;
    justify-content: center;
    gap: var(--space-16);
    margin-bottom: var(--space-24);
}

.store-button {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.3);
    padding: var(--space-16) var(--space-24);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    gap: var(--space-16);
    transition: all var(--transition-fast);
    color: white;
}

.store-button:hover {
    background: rgba(255, 255, 255, 0.3);
    transform: translateY(-4px);
}

.store-icon {
    width: 40px;
    height: 40px;
}

.store-text {
    font-size: 12px;
    opacity: 0.9;
    text-align: left;
}

.store-name {
    font-size: 18px;
    font-weight: 700;
    text-align: left;
}

.download-note {
    font-size: 16px;
    opacity: 0.9;
}

@media (max-width: 768px) {
    .download-title {
        font-size: 32px;
    }
   
    .download-buttons {
        flex-direction: column;
        align-items: center;
    }
   
    .store-button {
        width: 100%;
        max-width: 300px;
    }
}

/* ===== Footer ===== */
.footer {
    background: var(--color-text-primary);
    color: white;
    padding: var(--space-64) 0 var(--space-32);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-48);
    margin-bottom: var(--space-48);
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: var(--space-12);
    margin-bottom: var(--space-16);
}

.footer-description {
    color: rgba(255, 255, 255, 0.7);
    line-height: 1.7;
    margin-bottom: var(--space-24);
}

.social-links {
    display: flex;
    gap: var(--space-16);
}

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    background: rgba(255, 255, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
}

.social-links a:hover {
    background: var(--color-primary);
    transform: translateY(-4px);
}

.footer-heading {
    font-size: 16px;
    font-weight: 700;
    margin-bottom: var(--space-16);
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--space-12);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    transition: color var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
    padding-top: var(--space-32);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
}

.footer-bottom p {
    margin: var(--space-8) 0;
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-32);
    }
}

/* ===== Scroll to Top Button ===== */
.scroll-top {
    position: fixed;
    bottom: var(--space-32);
    right: var(--space-32);
    width: 48px;
    height: 48px;
    background: var(--color-primary);
    color: white;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
    z-index: 999;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
}

.scroll-top:hover {
    background: var(--color-primary-dark);
    transform: translateY(-4px);
}

/* ===== Animations ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

/* ===== Utility Classes ===== */
.text-center {
    text-align: center;
}

.mt-16 {
    margin-top: var(--space-16);
}

.mb-16 {
    margin-bottom: var(--space-16);
}

.mt-32 {
    margin-top: var(--space-32);
}

.mb-32 {
    margin-bottom: var(--space-32);
}