/* ============================================
   Chatura AI — Website Styles
   Based on Brand Guidelines v1
   ============================================ */

/* --- CSS Variables (Brand Colors) --- */
:root {
    --deep-navy: #0B1D20;
    --electric-blue: #0066FF;
    --cyan: #0D04FF;
    --violet: #8B5CF6;
    --white: #FFFFFF;
    --ice-white: #F8FAFC;
    --slate: #1E293B;
    --cool-gray: #64748B;
    --gradient-primary: linear-gradient(135deg, #0066FF, #0D04FF);
    --gradient-dark: linear-gradient(180deg, #0B1D20, #1E293B);
}

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

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    color: var(--white);
    background-color: var(--deep-navy);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- Layout --- */
.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

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

/* --- Navigation --- */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 22, 40, 0.92);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(0, 102, 255, 0.15);
}

.nav-container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 20px;
    font-weight: 800;
    color: var(--white);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.nav-logo-img {
    height: 32px;
    width: auto;
    vertical-align: middle;
    margin-right: 10px;
}

.nav-logo-accent {
    color: var(--electric-blue);
    font-weight: 600;
}

.nav-cta {
    font-size: 14px;
    font-weight: 600;
    color: var(--electric-blue);
    text-decoration: none;
    padding: 8px 20px;
    border: 1px solid var(--electric-blue);
    border-radius: 6px;
    transition: all 0.2s ease;
}

.nav-cta:hover {
    background: var(--electric-blue);
    color: var(--white);
}

/* --- Buttons --- */
.btn {
    display: inline-block;
    font-family: 'Inter', sans-serif;
    font-size: 16px;
    font-weight: 600;
    text-decoration: none;
    padding: 14px 32px;
    border-radius: 8px;
    transition: all 0.2s ease;
    cursor: pointer;
}

.btn-primary {
    background: var(--electric-blue);
    color: var(--white);
    border: none;
}

.btn-primary:hover {
    background: #0052CC;
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(0, 102, 255, 0.4);
}

.btn-large {
    font-size: 18px;
    padding: 18px 40px;
}

/* --- Hero Section --- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 120px 24px 80px;
    overflow: hidden;
}

.hero-container {
    max-width: 800px;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: clamp(36px, 6vw, 64px);
    font-weight: 800;
    line-height: 1.1;
    letter-spacing: -0.03em;
    margin-bottom: 24px;
    color: var(--white);
}

.hero-tagline {
    font-size: clamp(16px, 2.5vw, 20px);
    font-weight: 600;
    color: var(--electric-blue);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.hero-subtitle {
    font-size: clamp(16px, 2.5vw, 20px);
    font-weight: 400;
    color: var(--cool-gray);
    line-height: 1.6;
    margin-bottom: 40px;
    max-width: 640px;
    margin-left: auto;
    margin-right: auto;
}

.hero-gradient {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(0, 102, 255, 0.12) 0%, rgba(6, 182, 212, 0.05) 40%, transparent 70%);
    z-index: 1;
    pointer-events: none;
}

/* --- Sections --- */
.section {
    padding: 100px 0;
}

.section-dark {
    background: var(--deep-navy);
    color: var(--white);
}

.section-light {
    background: var(--white);
    color: var(--slate);
}

.section-gradient {
    background: linear-gradient(180deg, var(--deep-navy) 0%, #0F2440 100%);
    color: var(--white);
}

.section-title {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 700;
    line-height: 1.2;
    letter-spacing: -0.02em;
    margin-bottom: 24px;
}

.section-title.dark-text {
    color: var(--deep-navy);
}

.section-body {
    font-size: 18px;
    font-weight: 400;
    line-height: 1.7;
    max-width: 700px;
    margin-bottom: 16px;
}

.section-dark .section-body {
    color: #B0BEC5;
}

.section-light .section-body {
    color: var(--cool-gray);
}

.accent-text {
    color: var(--electric-blue) !important;
    font-weight: 600;
    font-size: 22px;
}

/* --- Stat Highlight --- */
.stat-highlight {
    font-size: clamp(60px, 10vw, 96px);
    font-weight: 800;
    color: var(--electric-blue);
    letter-spacing: -0.03em;
    line-height: 1;
    margin-bottom: 16px;
}

/* --- Pillars (What We Do) --- */
.pillars {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 48px;
    margin-top: 60px;
}

.pillar {
    text-align: center;
    padding: 32px 24px;
}

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

.pillar-title {
    font-size: 24px;
    font-weight: 700;
    color: var(--deep-navy);
    margin-bottom: 12px;
}

.pillar-text {
    font-size: 16px;
    color: var(--cool-gray);
    line-height: 1.6;
}

/* --- Founder Section --- */
.founder-content {
    max-width: 700px;
}

.founder-highlights {
    list-style: none;
    padding: 0;
    margin: 24px 0;
}

.founder-highlights li {
    font-size: 16px;
    color: #B0BEC5;
    padding: 8px 0;
    padding-left: 20px;
    position: relative;
}

.founder-highlights li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 16px;
    width: 8px;
    height: 8px;
    background: var(--electric-blue);
    border-radius: 50%;
}

.founder-highlights li strong {
    color: var(--white);
}

.founder-quote {
    font-size: 18px;
    font-style: italic;
    color: var(--cool-gray);
    border-left: 3px solid var(--electric-blue);
    padding-left: 24px;
    margin-top: 32px;
    line-height: 1.7;
}

/* --- Footer --- */
.footer {
    background: #060E1A;
    padding: 48px 0 32px;
    border-top: 1px solid rgba(0, 102, 255, 0.1);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 32px;
    flex-wrap: wrap;
    gap: 16px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.footer-logo {
    font-size: 18px;
    font-weight: 800;
    color: var(--white);
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 8px;
}

.footer-logo-img {
    height: 28px;
    width: auto;
}

.footer-tagline {
    font-size: 14px;
    color: var(--cool-gray);
    font-weight: 500;
}

.footer-contact a {
    font-size: 14px;
    color: var(--electric-blue);
    text-decoration: none;
}

.footer-contact a:hover {
    text-decoration: underline;
}

.footer-bottom {
    border-top: 1px solid rgba(100, 116, 139, 0.2);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
}

.footer-sanskrit {
    font-size: 13px;
    color: var(--cool-gray);
    font-style: italic;
}

.footer-copyright {
    font-size: 13px;
    color: var(--cool-gray);
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .section {
        padding: 64px 0;
    }

    .hero {
        padding: 100px 20px 60px;
    }

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

    .footer-content {
        flex-direction: column;
        align-items: flex-start;
    }

    .footer-bottom {
        flex-direction: column;
    }

    .stat-highlight {
        font-size: 60px;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 12px 16px;
    }

    .nav-logo {
        font-size: 18px;
    }

    .btn-large {
        font-size: 16px;
        padding: 14px 28px;
    }
}