/* ===========================
   DESIGN TOKENS
   =========================== */
:root {
    --color-primary: #1a56db;
    --color-primary-light: #3b82f6;
    --color-primary-lighter: #dbeafe;
    --color-primary-dark: #1240a8;
    --color-accent: #ffc107;
    --color-text: #1a1a2e;
    --color-text-secondary: #555770;
    --color-text-light: #8b8da3;
    --color-bg: #ffffff;
    --color-bg-subtle: #f8f9fa;
    --color-bg-muted: #f0f2f5;
    --color-border: #e2e5e9;
    --color-border-light: #eef0f3;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-serif: 'DM Serif Display', Georgia, serif;
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.06), 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 4px 12px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.04);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.1), 0 4px 12px rgba(0,0,0,0.04);
    --shadow-xl: 0 24px 60px rgba(0,0,0,0.12);
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===========================
   RESET & BASE
   =========================== */
*, *::before, *::after {
    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-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    font-size: 16px;
    overflow-x: hidden;
}

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

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

h1, h2, h3, h4 {
    line-height: 1.2;
    font-weight: 700;
}

h1 { font-weight: 800; }
h2 { font-weight: 700; }

/* ===========================
   LAYOUT
   =========================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* ===========================
   BUTTONS
   =========================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.95rem;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    padding: 10px 24px;
    cursor: pointer;
    transition: all var(--transition);
    text-align: center;
    justify-content: center;
    white-space: nowrap;
}

.btn-primary {
    background: var(--color-primary);
    color: #ffffff;
    border-color: var(--color-primary);
}

.nav-links .btn-primary {
    color: #ffffff;
}

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

.btn-outline {
    background: transparent;
    color: var(--color-primary);
    border-color: var(--color-primary);
}

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

.btn-sm { padding: 8px 18px; font-size: 0.875rem; }
.btn-lg { padding: 14px 32px; font-size: 1rem; }
.btn-full { width: 100%; }

/* ===========================
   NAVIGATION
   =========================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid transparent;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.nav.scrolled {
    border-bottom-color: var(--color-border);
    box-shadow: var(--shadow-sm);
}

.nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.logo {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.logo-text {
    font-family: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    font-weight: 700;
    font-size: 2rem;
    letter-spacing: -0.02em;
    color: var(--color-text);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: color var(--transition);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    border-radius: 2px;
    transition: all var(--transition);
}

.mobile-menu {
    display: none;
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding: 16px 24px;
    flex-direction: column;
    gap: 12px;
    z-index: 999;
    box-shadow: var(--shadow-lg);
}

.mobile-menu a {
    padding: 8px 0;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.mobile-menu .btn {
    margin-top: 8px;
}

/* ===========================
   HERO
   =========================== */
.hero {
    padding: 140px 0 80px;
    background: linear-gradient(135deg, #f8f9fc 0%, #eef2fb 50%, #f0f4f8 100%);
    overflow: hidden;
}

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

.hero-badge {
    display: inline-block;
    background: var(--color-primary-lighter);
    color: var(--color-primary);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 6px 16px;
    border-radius: 100px;
    margin-bottom: 24px;
}

.hero h1 {
    font-size: clamp(2.4rem, 5vw, 3.6rem);
    color: var(--color-text);
    margin-bottom: 20px;
    letter-spacing: -0.02em;
}

.hero-subtitle {
    font-size: 1.15rem;
    line-height: 1.7;
    color: var(--color-text-secondary);
    margin-bottom: 32px;
    max-width: 540px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    margin-bottom: 40px;
}

.hero-trust {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
}

.trust-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

.trust-item svg {
    width: 18px;
    height: 18px;
    color: var(--color-primary-light);
    flex-shrink: 0;
}

/* Phone Mockup */
.hero-visual {
    display: flex;
    justify-content: center;
}

.phone-mockup {
    perspective: 1000px;
}

.phone-frame {
    width: 280px;
    height: 560px;
    background: #1a1a2e;
    border-radius: 36px;
    padding: 12px;
    box-shadow: var(--shadow-xl), 0 0 0 2px rgba(0,0,0,0.05);
    transform: rotateY(-5deg) rotateX(2deg);
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.phone-frame:hover {
    transform: rotateY(0deg) rotateX(0deg);
}

.phone-screen {
    width: 100%;
    height: 100%;
    border-radius: 26px;
    overflow: hidden;
    position: relative;
    background: var(--color-bg-muted);
}

.phone-screen img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.phone-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(180deg, rgba(0,0,0,0) 40%, rgba(26,86,219,0.85) 100%);
    display: flex;
    align-items: flex-end;
    padding: 24px;
}

.stamp-animation {
    display: flex;
    align-items: center;
    gap: 12px;
    color: #fff;
    font-weight: 600;
    font-size: 1rem;
    animation: stampPulse 2s ease-in-out infinite;
}

.stamp-circle {
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.2);
    border: 2px solid #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.stamp-circle svg {
    width: 22px;
    height: 22px;
}

@keyframes stampPulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.8; transform: scale(1.02); }
}

/* ===========================
   SOCIAL PROOF BAR
   =========================== */
.social-proof {
    padding: 48px 0;
    border-bottom: 1px solid var(--color-border-light);
}

.social-proof p {
    text-align: center;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--color-text-light);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 24px;
}

.proof-items {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 40px;
}

.proof-item {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--color-text-secondary);
    font-weight: 600;
    font-size: 0.95rem;
}

.proof-item svg {
    width: 28px;
    height: 28px;
    color: var(--color-primary-light);
}

/* ===========================
   SECTION HEADERS
   =========================== */
.section-header {
    text-align: center;
    max-width: 680px;
    margin: 0 auto 56px;
}

.section-label {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--color-primary-light);
    margin-bottom: 12px;
}

.section-header h2 {
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    margin-bottom: 16px;
    letter-spacing: -0.01em;
}

.section-header p {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
}

/* ===========================
   HOW IT WORKS
   =========================== */
.how-it-works {
    padding: 100px 0;
}

.steps-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 36px;
}

.step-card {
    text-align: center;
    padding: 40px 32px;
    border-radius: var(--radius-lg);
    background: var(--color-bg);
    border: 1px solid var(--color-border-light);
    position: relative;
    transition: all var(--transition);
}

.step-card:hover {
    border-color: var(--color-primary-lighter);
    box-shadow: var(--shadow-md);
    transform: translateY(-4px);
}

.step-number {
    position: absolute;
    top: -16px;
    left: 50%;
    transform: translateX(-50%);
    width: 36px;
    height: 36px;
    background: var(--color-primary);
    color: #fff;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.9rem;
    box-shadow: var(--shadow-sm);
}

.step-icon {
    width: 64px;
    height: 64px;
    margin: 12px auto 20px;
    color: var(--color-primary-light);
}

.step-icon svg {
    width: 100%;
    height: 100%;
}

.step-card h3 {
    font-size: 1.15rem;
    margin-bottom: 12px;
    font-family: var(--font-sans);
}

.step-card p {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
}

/* ===========================
   FEATURES
   =========================== */
.features {
    padding: 100px 0;
    background: var(--color-bg-subtle);
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.feature-card {
    padding: 36px;
    border-radius: var(--radius-md);
    background: var(--color-bg);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition);
}

.feature-card:hover {
    border-color: var(--color-primary-lighter);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.feature-highlight {
    grid-column: 1 / -1;
    display: flex;
    flex-direction: column;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
    color: #fff;
    border: none;
    padding: 48px;
}

.feature-highlight .feature-icon { color: #ffffff; }
.feature-highlight h3 { color: #ffffff; }
.feature-highlight p { color: #ffffff; line-height: 1.75; }

.feature-icon {
    width: 44px;
    height: 44px;
    color: var(--color-primary-light);
    flex-shrink: 0;
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    font-size: 1.05rem;
    margin: 16px 0 10px;
    font-family: var(--font-sans);
}

.feature-highlight h3 {
    margin-top: 12px;
    font-size: 1.3rem;
}

.feature-highlight p {
    font-size: 1rem;
    max-width: 720px;
}

.feature-card p {
    font-size: 0.92rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
}

.feature-card.feature-highlight p {
    color: #ffffff;
}

/* ===========================
   USE CASES
   =========================== */
.use-cases {
    padding: 100px 0;
}

.use-cases-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.use-case-card {
    border-radius: var(--radius-lg);
    overflow: hidden;
    background: var(--color-bg);
    border: 1px solid var(--color-border-light);
    transition: all var(--transition);
}

.use-case-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-4px);
}

.use-case-image {
    height: 220px;
    overflow: hidden;
}

.use-case-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

.use-case-card:hover .use-case-image img {
    transform: scale(1.05);
}

.use-case-content {
    padding: 28px;
}

.use-case-tag {
    display: inline-block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--color-primary-light);
    background: var(--color-primary-lighter);
    padding: 4px 12px;
    border-radius: 100px;
    margin-bottom: 12px;
}

.use-case-content h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    font-family: var(--font-sans);
}

.use-case-content p {
    font-size: 0.92rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
}

/* ===========================
   CASE STUDY
   =========================== */
.case-study {
    padding: 100px 0;
    background: var(--color-bg-subtle);
}

.case-study-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.case-study-content .section-label {
    display: block;
    margin-bottom: 12px;
}

.case-study-content h2 {
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    margin-bottom: 20px;
}

.case-study-lead {
    font-size: 1.1rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
}

.case-study-details {
    display: flex;
    flex-direction: column;
    gap: 24px;
    margin-bottom: 32px;
}

.case-detail strong {
    display: block;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--color-primary-light);
    margin-bottom: 6px;
}

.case-detail p {
    font-size: 0.95rem;
    color: var(--color-text-secondary);
    line-height: 1.65;
}

.case-study-visual {
    border-radius: var(--radius-xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
}

.case-study-visual img {
    width: 100%;
    height: 500px;
    object-fit: cover;
}

/* ===========================
   STATS
   =========================== */
.stats-section {
    padding: 80px 0;
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-light) 100%);
}

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

.stat-card {
    text-align: center;
    color: #fff;
}

.stat-number {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    margin-bottom: 8px;
}

.stat-label {
    font-size: 0.9rem;
    opacity: 0.85;
    font-weight: 500;
}

/* ===========================
   CONTACT
   =========================== */
.contact {
    padding: 100px 0;
}

.contact-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-info h2 {
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    margin-bottom: 16px;
}

.contact-info > p {
    font-size: 1.05rem;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
}

.contact-perks {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.perk {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.perk svg {
    width: 20px;
    height: 20px;
    color: var(--color-primary-light);
    flex-shrink: 0;
}

/* Form */
.contact-form {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: var(--shadow-md);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    border: 1.5px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-bg);
    color: var(--color-text);
    transition: border-color var(--transition), box-shadow var(--transition);
    outline: none;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-primary-light);
    box-shadow: 0 0 0 3px var(--color-primary-lighter);
}

.form-group textarea {
    resize: vertical;
    min-height: 100px;
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 16 16'%3E%3Cpath fill='%23555770' d='M4.427 6.427l3.396 3.396a.25.25 0 00.354 0l3.396-3.396A.25.25 0 0011.396 6H4.604a.25.25 0 00-.177.427z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

.form-note {
    text-align: center;
    font-size: 0.82rem;
    color: var(--color-text-light);
    margin-top: 16px;
}

/* Form success state */
.form-success {
    text-align: center;
    padding: 48px 24px;
}

.form-success svg {
    width: 56px;
    height: 56px;
    color: var(--color-primary-light);
    margin-bottom: 16px;
}

.form-success h3 {
    font-size: 1.3rem;
    margin-bottom: 8px;
    font-family: var(--font-sans);
}

.form-success p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* ===========================
   FOOTER
   =========================== */
.footer {
    padding: 60px 0 32px;
    background: var(--color-text);
    color: rgba(255,255,255,0.7);
}

.footer-inner {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand .logo {
    margin-bottom: 12px;
}

.footer .logo-text {
    color: #ffffff;
}

.footer-brand p {
    font-size: 0.9rem;
    line-height: 1.6;
    max-width: 320px;
}

.footer-links {
    display: flex;
    gap: 60px;
    justify-content: flex-end;
}

.footer-col {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.footer-col h4 {
    color: #fff;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 4px;
    font-family: var(--font-sans);
}

.footer-col a {
    font-size: 0.9rem;
    transition: color var(--transition);
}

.footer-col a:hover {
    color: #fff;
}

.footer-bottom {
    border-top: 1px solid rgba(255,255,255,0.1);
    padding-top: 24px;
    font-size: 0.82rem;
}

/* ===========================
   ANIMATIONS
   =========================== */
.fade-in {
    opacity: 0;
    transform: translateY(24px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* ===========================
   RESPONSIVE
   =========================== */
@media (max-width: 1024px) {
    .hero .container {
        grid-template-columns: 1fr;
        gap: 48px;
    }

    .hero-visual {
        order: -1;
    }

    .phone-frame {
        width: 240px;
        height: 480px;
        transform: none;
    }

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

    .feature-highlight {
        grid-column: 1 / -1;
    }

    .case-study-inner {
        grid-template-columns: 1fr;
    }

    .case-study-visual {
        order: -1;
    }

    .case-study-visual img {
        height: 360px;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 40px;
    }

    .contact-inner {
        grid-template-columns: 1fr;
    }
}

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

    .hero { padding: 120px 0 60px; }
    .hero h1 { font-size: 2.2rem; }

    .steps-grid {
        grid-template-columns: 1fr;
        max-width: 480px;
        margin: 0 auto;
    }

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

    .feature-highlight {
        padding: 32px;
    }

    .use-cases-grid { grid-template-columns: 1fr; }

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

    .footer-links {
        justify-content: flex-start;
    }

    .form-row { grid-template-columns: 1fr; }

    .contact-form { padding: 28px; }

    .proof-items {
        gap: 24px;
    }

    .how-it-works,
    .features,
    .use-cases,
    .case-study,
    .contact {
        padding: 72px 0;
    }
}

@media (max-width: 480px) {
    .hero h1 { font-size: 1.8rem; }
    .hero-subtitle { font-size: 1rem; }
    .hero-actions { flex-direction: column; }
    .hero-actions .btn { width: 100%; }
    .stats-grid { grid-template-columns: 1fr; gap: 32px; }
    .proof-items { flex-direction: column; align-items: center; gap: 16px; }
}