/* ========================================
   tanso.in - Art Deco Carbon Intelligence
   Colors: #1a1a2e, #f5f0e8, #e8b84b, #4a90d9, #6c757d
   Fonts: Inter (body), Playfair Display (headings - Art Deco)
   ======================================== */

*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --deep-base: #1a1a2e;
    --warm-white: #f5f0e8;
    --accent-gold: #e8b84b;
    --primary-blue: #4a90d9;
    --muted-gray: #6c757d;
    --gradient-gold: linear-gradient(135deg, #e8b84b 0%, #1a1a2e 100%);
    --gradient-jewel: linear-gradient(135deg, #e8b84b 0%, #4a90d9 50%, #1a1a2e 100%);
    --gradient-card: linear-gradient(160deg, rgba(232, 184, 75, 0.08) 0%, rgba(26, 26, 46, 0.95) 100%);
    --font-heading: 'Playfair Display', Georgia, serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    background-color: var(--deep-base);
    color: var(--warm-white);
    overflow-x: hidden;
    line-height: 1.6;
}

/* Background Pattern */
.deco-bg-pattern {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.deco-svg-top {
    width: 100%;
    height: 200px;
}

/* Organic Blobs */
.blob {
    position: fixed;
    border-radius: 50%;
    filter: blur(80px);
    pointer-events: none;
    z-index: 0;
    opacity: 0.12;
}

.blob-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #e8b84b, transparent);
    top: -100px;
    right: -150px;
    animation: blobFloat1 20s ease-in-out infinite;
}

.blob-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #4a90d9, transparent);
    bottom: 20%;
    left: -100px;
    animation: blobFloat2 25s ease-in-out infinite;
}

.blob-3 {
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, #e8b84b, transparent);
    top: 60%;
    right: -80px;
    animation: blobFloat3 18s ease-in-out infinite;
}

@keyframes blobFloat1 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(-40px, 60px) scale(1.1); }
    66% { transform: translate(30px, -30px) scale(0.95); }
}

@keyframes blobFloat2 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    50% { transform: translate(50px, -40px) scale(1.05); }
}

@keyframes blobFloat3 {
    0%, 100% { transform: translate(0, 0) scale(1); }
    40% { transform: translate(-30px, 40px) scale(1.08); }
    70% { transform: translate(20px, -20px) scale(0.92); }
}

/* ---- HEADER ---- */
.site-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 100;
    background: rgba(26, 26, 46, 0.92);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.header-inner {
    max-width: 1280px;
    margin: 0 auto;
    padding: 16px 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

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

.logo-icon {
    animation: logoSpin 30s linear infinite;
}

@keyframes logoSpin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.logo-text {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--warm-white);
    letter-spacing: 0.02em;
}

.logo-dot {
    color: var(--accent-gold);
}

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

.nav-link {
    font-family: var(--font-body);
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--muted-gray);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    transition: color 0.3s ease;
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent-gold);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.deco-header-border {
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, #e8b84b 50%, transparent 100%);
    opacity: 0.4;
}

/* ---- HERO ---- */
.hero {
    position: relative;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 120px 40px 80px;
    z-index: 1;
}

.hero-deco-frame {
    position: absolute;
    inset: 60px;
    pointer-events: none;
}

.hero-corner {
    position: absolute;
    opacity: 0.6;
}

.hero-corner-tl { top: 0; left: 0; }
.hero-corner-tr { top: 0; right: 0; }
.hero-corner-bl { bottom: 0; left: 0; }
.hero-corner-br { bottom: 0; right: 0; }

.hero-content {
    text-align: center;
    max-width: 800px;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-family: var(--font-heading);
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-weight: 900;
    line-height: 1.1;
    color: var(--warm-white);
    margin-bottom: 24px;
    letter-spacing: -0.01em;
}

.hero-title-accent {
    background: linear-gradient(135deg, #e8b84b, #4a90d9);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-family: var(--font-body);
    font-size: 1.2rem;
    color: var(--muted-gray);
    min-height: 2em;
    margin-bottom: 40px;
    line-height: 1.7;
}

.hero-cta-group {
    display: flex;
    gap: 20px;
    justify-content: center;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 14px 36px;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border-radius: 0;
    transition: all 0.3s ease;
    position: relative;
}

.btn-gold {
    background: var(--accent-gold);
    color: var(--deep-base);
    border: 2px solid var(--accent-gold);
}

.btn-gold:hover {
    background: transparent;
    color: var(--accent-gold);
    box-shadow: 0 0 20px rgba(232, 184, 75, 0.3);
}

.btn-outline {
    background: transparent;
    color: var(--warm-white);
    border: 2px solid var(--muted-gray);
}

.btn-outline:hover {
    border-color: var(--accent-gold);
    color: var(--accent-gold);
}

.hero-deco-line {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    width: 1px;
    height: 60px;
    background: linear-gradient(to bottom, var(--accent-gold), transparent);
    animation: heroLinePulse 2s ease-in-out infinite;
}

@keyframes heroLinePulse {
    0%, 100% { opacity: 0.4; height: 60px; }
    50% { opacity: 1; height: 80px; }
}

/* ---- SECTIONS ---- */
.section-header {
    text-align: center;
    margin-bottom: 60px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(1.8rem, 4vw, 3rem);
    font-weight: 800;
    color: var(--warm-white);
    letter-spacing: 0.02em;
}

.deco-divider {
    opacity: 0.6;
}

.deco-divider svg {
    max-width: 100%;
}

/* ---- BENTO GRID ---- */
.bento-section {
    position: relative;
    z-index: 1;
    padding: 100px 40px;
    max-width: 1280px;
    margin: 0 auto;
}

.bento-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    grid-auto-rows: minmax(220px, auto);
    gap: 24px;
}

.bento-cell {
    position: relative;
    background: var(--gradient-card);
    border: 1px solid rgba(232, 184, 75, 0.15);
    overflow: hidden;
    transition: transform 0.4s ease, box-shadow 0.4s ease, border-color 0.4s ease;
}

.bento-cell:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(232, 184, 75, 0.15);
    border-color: rgba(232, 184, 75, 0.4);
}

.bento-large {
    grid-column: span 2;
    grid-row: span 2;
}

.bento-medium {
    grid-column: span 2;
    grid-row: span 1;
}

.bento-small {
    grid-column: span 1;
    grid-row: span 1;
}

.cell-deco-border {
    position: absolute;
    inset: 0;
    pointer-events: none;
    z-index: 2;
}

.cell-corner {
    position: absolute;
    opacity: 0.7;
    transition: opacity 0.3s ease;
}

.bento-cell:hover .cell-corner {
    opacity: 1;
}

.cell-corner-tl { top: 0; left: 0; }
.cell-corner-tr { top: 0; right: 0; }
.cell-corner-bl { bottom: 0; left: 0; }
.cell-corner-br { bottom: 0; right: 0; }

.cell-content {
    position: relative;
    z-index: 1;
    padding: 32px;
    height: 100%;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.cell-icon {
    margin-bottom: 20px;
    opacity: 0.9;
}

.cell-title {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-gold);
    margin-bottom: 12px;
    letter-spacing: 0.02em;
}

.cell-insight {
    font-size: 0.95rem;
    color: var(--muted-gray);
    line-height: 1.6;
    min-height: 2.5em;
    margin-bottom: 16px;
}

.cell-metric {
    margin-top: auto;
    padding-top: 16px;
    border-top: 1px solid rgba(232, 184, 75, 0.2);
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.metric-value {
    font-family: var(--font-heading);
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--accent-gold);
    line-height: 1;
}

.metric-unit {
    font-size: 0.85rem;
    color: var(--muted-gray);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

/* ---- ANALYTICS ---- */
.analytics-section {
    position: relative;
    z-index: 1;
    padding: 100px 40px;
    background: linear-gradient(180deg, transparent 0%, rgba(232, 184, 75, 0.03) 50%, transparent 100%);
}

.analytics-grid {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 40px;
}

.analytics-card {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.analytics-ring {
    position: relative;
    width: 120px;
    height: 120px;
}

.ring-label {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--warm-white);
}

.analytics-label {
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--muted-gray);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* ---- INSIGHTS ---- */
.insights-section {
    position: relative;
    z-index: 1;
    padding: 100px 40px;
    max-width: 1280px;
    margin: 0 auto;
}

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

.insight-card {
    background: var(--gradient-card);
    border: 1px solid rgba(232, 184, 75, 0.15);
    padding: 40px 32px;
    position: relative;
    transition: transform 0.4s ease, box-shadow 0.4s ease;
}

.insight-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(232, 184, 75, 0.12);
}

.insight-number {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 900;
    color: var(--accent-gold);
    opacity: 0.2;
    line-height: 1;
    margin-bottom: 16px;
}

.insight-title {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--warm-white);
    margin-bottom: 12px;
}

.insight-text {
    font-size: 0.95rem;
    color: var(--muted-gray);
    line-height: 1.7;
    min-height: 4em;
}

/* ---- ABOUT ---- */
.about-section {
    position: relative;
    z-index: 1;
    padding: 100px 40px;
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
    position: relative;
    padding: 60px 40px;
}

.about-deco-frame {
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.about-corner {
    position: absolute;
    opacity: 0.5;
}

.about-corner-tl { top: 0; left: 0; }
.about-corner-br { bottom: 0; right: 0; }

.about-title {
    font-family: var(--font-heading);
    font-size: clamp(1.8rem, 4vw, 2.5rem);
    font-weight: 800;
    color: var(--accent-gold);
    margin-bottom: 24px;
}

.about-text {
    font-size: 1.05rem;
    color: var(--muted-gray);
    line-height: 1.8;
    margin-bottom: 20px;
}

.about-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-top: 48px;
    padding-top: 32px;
    border-top: 1px solid rgba(232, 184, 75, 0.2);
}

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

.stat-value {
    font-family: var(--font-heading);
    font-size: 3rem;
    font-weight: 800;
    color: var(--accent-gold);
    line-height: 1;
}

.stat-suffix {
    font-family: var(--font-heading);
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-gold);
}

.stat-label {
    display: block;
    font-size: 0.8rem;
    color: var(--muted-gray);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-top: 8px;
}

/* ---- FOOTER ---- */
.site-footer {
    position: relative;
    z-index: 1;
    padding: 60px 40px 40px;
}

.footer-deco-border {
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, #e8b84b 50%, transparent 100%);
    opacity: 0.3;
    margin-bottom: 40px;
}

.footer-inner {
    max-width: 1280px;
    margin: 0 auto;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.footer-logo-text {
    font-family: var(--font-heading);
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--warm-white);
}

.footer-links {
    display: flex;
    gap: 32px;
}

.footer-links a {
    font-size: 0.85rem;
    color: var(--muted-gray);
    text-decoration: none;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: color 0.3s ease;
}

.footer-links a:hover {
    color: var(--accent-gold);
}

.footer-copy {
    font-size: 0.8rem;
    color: var(--muted-gray);
    opacity: 0.6;
}

/* ---- TYPEWRITER CURSOR ---- */
.typewriter-cursor {
    display: inline-block;
    width: 2px;
    height: 1em;
    background: var(--accent-gold);
    margin-left: 2px;
    vertical-align: text-bottom;
    animation: cursorBlink 0.8s ease-in-out infinite;
}

@keyframes cursorBlink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

/* ---- ANIMATIONS ---- */
.fade-in-up {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease, transform 0.8s ease;
}

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

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

    .bento-large {
        grid-column: span 2;
        grid-row: span 1;
    }

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

@media (max-width: 768px) {
    .header-inner {
        padding: 12px 20px;
    }

    .main-nav {
        gap: 16px;
    }

    .nav-link {
        font-size: 0.75rem;
    }

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

    .hero-deco-frame {
        inset: 20px;
    }

    .bento-section,
    .analytics-section,
    .insights-section,
    .about-section {
        padding: 60px 20px;
    }

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

    .bento-large,
    .bento-medium {
        grid-column: span 1;
    }

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

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

    .about-stats {
        flex-direction: column;
        gap: 24px;
    }

    .hero-cta-group {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .main-nav {
        display: none;
    }

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

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

    .footer-links {
        flex-wrap: wrap;
        justify-content: center;
        gap: 16px;
    }
}