/* ===========================
   CSS Custom Properties (Variables)
   =========================== */
:root {
    /* Primary Colors */
    --primary-blue: #0066FF;
    --primary-cyan: #00C9FF;
    --primary-purple: #6C5CE7;
    --primary-green: #2E7D32;
    --primary-orange: #F57C00;
    --primary-pink: #C2185B;
    --primary-teal: #0288D1;

    /* Neutral Colors */
    --white: #FFFFFF;
    --gray-50: #F9FAFB;
    --gray-100: #F3F4F6;
    --gray-200: #E5E7EB;
    --gray-300: #D1D5DB;
    --gray-400: #9CA3AF;
    --gray-500: #6B7280;
    --gray-600: #4B5563;
    --gray-700: #374151;
    --gray-800: #1F2937;
    --gray-900: #111827;

    /* Background Colors */
    --bg-light-blue: #E3F2FD;
    --bg-light-purple: #F3E5F5;
    --bg-light-green: #E8F5E9;
    --bg-light-orange: #FFF3E0;
    --bg-light-pink: #FCE4EC;
    --bg-light-teal: #E1F5FE;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing */
    --container-max-width: 1200px;
    --section-padding: 100px;
    --section-padding-mobile: 60px;

    /* Transitions */
    --transition-speed: 0.3s;
    --transition-smooth: cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    color: var(--gray-800);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

/* ===========================
   Header
   =========================== */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--gray-200);
    transition: all var(--transition-speed) var(--transition-smooth);
}

.header.scrolled {
    box-shadow: 0 2px 20px rgba(0, 0, 0, 0.08);
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-text {
    font-family: var(--font-display);
    font-size: 24px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav {
    display: flex;
    gap: 32px;
}

.nav-item {
    font-size: 15px;
    font-weight: 500;
    color: var(--gray-700);
    cursor: pointer;
    transition: color var(--transition-speed);
}

.nav-item:hover {
    color: var(--primary-blue);
}

/* ===========================
   Hero Section
   =========================== */
.hero {
    padding-top: 160px;
    padding-bottom: var(--section-padding);
    background: linear-gradient(180deg, var(--gray-50) 0%, var(--white) 100%);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.hero-title {
    font-family: var(--font-display);
    font-size: 56px;
    font-weight: 800;
    line-height: 1.1;
    color: var(--gray-900);
    margin-bottom: 24px;
}

.hero-subtitle {
    font-size: 20px;
    color: var(--gray-600);
    margin-bottom: 40px;
    line-height: 1.6;
}

.hero-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

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

.stat-number {
    font-family: var(--font-display);
    font-size: 48px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 8px;
}

.stat-number::after {
    content: '%';
    font-size: 28px;
}

.stat-item:nth-child(2) .stat-number::after {
    content: '';
}

.stat-item:last-child .stat-number::after {
    content: '%';
}

.stat-label {
    font-size: 14px;
    color: var(--gray-600);
    font-weight: 500;
}

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

.visual-card {
    background: var(--white);
    border-radius: 16px;
    padding: 24px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.12);
    width: 100%;
    max-width: 480px;
}

.card-header {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}

.card-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--gray-300);
}

.card-dot:nth-child(1) {
    background: #FF5F57;
}

.card-dot:nth-child(2) {
    background: #FEBC2E;
}

.card-dot:nth-child(3) {
    background: #28C840;
}

.card-content {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.commit-line {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    background: var(--gray-50);
    border-radius: 8px;
    transition: all var(--transition-speed);
}

.commit-line:hover {
    background: var(--bg-light-blue);
    transform: translateX(4px);
}

.commit-text {
    flex: 1;
    font-size: 14px;
    color: var(--gray-700);
    font-weight: 500;
}

.commit-time {
    font-size: 12px;
    color: var(--gray-500);
}

/* ===========================
   Section Header
   =========================== */
.section-header {
    text-align: center;
    margin-bottom: 64px;
}

.section-title {
    font-family: var(--font-display);
    font-size: 42px;
    font-weight: 700;
    color: var(--gray-900);
    margin-bottom: 16px;
}

.section-subtitle {
    font-size: 18px;
    color: var(--gray-600);
    max-width: 600px;
    margin: 0 auto;
}

/* ===========================
   Features Section
   =========================== */
.features {
    padding: var(--section-padding) 0;
    background: var(--white);
}

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

.feature-card {
    padding: 32px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: 16px;
    transition: all var(--transition-speed) var(--transition-smooth);
}

.feature-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.1);
    border-color: var(--primary-blue);
}

.feature-icon {
    margin-bottom: 24px;
}

.feature-title {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.feature-description {
    font-size: 15px;
    color: var(--gray-600);
    line-height: 1.6;
}

/* ===========================
   Process Section
   =========================== */
.process {
    padding: var(--section-padding) 0;
    background: var(--gray-50);
}

.process-steps {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    align-items: flex-start;
}

.process-step {
    text-align: center;
    padding: 32px 24px;
    background: var(--white);
    border-radius: 16px;
    position: relative;
}

.step-number {
    font-family: var(--font-display);
    font-size: 64px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    opacity: 0.2;
    margin-bottom: 16px;
}

.step-content {
    position: relative;
}

.step-title {
    font-family: var(--font-display);
    font-size: 20px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 12px;
}

.step-description {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.6;
}

.process-connector {
    display: none;
}

/* ===========================
   Trust Section
   =========================== */
.trust {
    padding: var(--section-padding) 0;
    background: var(--white);
}

.trust-badges {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.badge-item {
    text-align: center;
    padding: 32px 24px;
    background: var(--gray-50);
    border-radius: 16px;
    transition: all var(--transition-speed) var(--transition-smooth);
}

.badge-item:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.08);
}

.badge-icon {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.badge-title {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 8px;
}

.badge-description {
    font-size: 14px;
    color: var(--gray-600);
    line-height: 1.5;
}

/* ===========================
   Testimonials Section
   =========================== */
.testimonials {
    padding: var(--section-padding) 0;
    background: var(--gray-50);
}

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

.testimonial-card {
    padding: 40px;
    background: var(--white);
    border-radius: 16px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

.testimonial-quote {
    margin-bottom: 24px;
}

.testimonial-text {
    font-size: 16px;
    color: var(--gray-700);
    line-height: 1.7;
    margin-bottom: 32px;
}

.testimonial-author {
    display: flex;
    gap: 16px;
    align-items: center;
}

.author-avatar {
    flex-shrink: 0;
}

.author-name {
    font-weight: 600;
    color: var(--gray-900);
    margin-bottom: 4px;
}

.author-title {
    font-size: 14px;
    color: var(--gray-600);
}

/* ===========================
   Stats Section
   =========================== */
.stats-section {
    padding: var(--section-padding) 0;
    background: linear-gradient(135deg, var(--primary-blue), var(--primary-cyan));
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 48px;
}

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

.stat-value {
    font-family: var(--font-display);
    font-size: 56px;
    font-weight: 800;
    color: var(--white);
    margin-bottom: 8px;
}

.stat-value::after {
    content: '+';
    margin-left: 4px;
}

.stats-grid .stat-card:nth-child(2) .stat-value::after {
    content: 'M+';
}

.stats-grid .stat-card:nth-child(3) .stat-value::after {
    content: '+';
}

.stats-grid .stat-card:last-child .stat-value::after {
    content: '/7';
}

.stat-card .stat-label {
    font-size: 16px;
    color: rgba(255, 255, 255, 0.9);
    font-weight: 500;
}

/* ===========================
   Footer
   =========================== */
.footer {
    padding: 80px 0 32px;
    background: var(--gray-900);
    color: var(--gray-400);
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 3fr;
    gap: 64px;
    margin-bottom: 48px;
}

.footer-brand .logo-text {
    color: var(--white);
}

.footer-description {
    margin-top: 16px;
    font-size: 15px;
    line-height: 1.6;
    max-width: 300px;
}

.footer-columns {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.footer-heading {
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 600;
    color: var(--white);
    margin-bottom: 16px;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links li {
    font-size: 14px;
    color: var(--gray-400);
    cursor: pointer;
    transition: color var(--transition-speed);
}

.footer-links li:hover {
    color: var(--white);
}

.footer-bottom {
    padding-top: 32px;
    border-top: 1px solid var(--gray-800);
    text-align: center;
    font-size: 14px;
}

/* ===========================
   Animation Classes
   =========================== */
.fade-in {
    opacity: 0;
    animation: fadeIn 0.8s ease-out forwards;
}

.fade-in-delay {
    opacity: 0;
    animation: fadeIn 0.8s ease-out 0.3s forwards;
}

.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .hero-visual {
        order: -1;
    }

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

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

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

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

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

    .footer-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }

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

@media (max-width: 768px) {
    :root {
        --section-padding: 60px;
    }

    .nav {
        display: none;
    }

    .hero {
        padding-top: 120px;
        padding-bottom: var(--section-padding-mobile);
    }

    .hero-title {
        font-size: 36px;
    }

    .hero-subtitle {
        font-size: 18px;
    }

    .section-title {
        font-size: 32px;
    }

    .section-subtitle {
        font-size: 16px;
    }

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

    .process-steps {
        grid-template-columns: 1fr;
    }

    .trust-badges {
        grid-template-columns: 1fr;
    }

    .stats-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .hero-stats {
        grid-template-columns: 1fr;
        gap: 24px;
    }

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

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }

    .header-content {
        padding: 16px 0;
    }

    .logo-text {
        font-size: 20px;
    }

    .hero-title {
        font-size: 32px;
    }

    .section-title {
        font-size: 28px;
    }

    .stat-value {
        font-size: 42px;
    }

    .testimonial-card {
        padding: 28px;
    }
}