/* 
   RYOUSHI DESIGN SYSTEM 
   Theme: Surreal Sanctuary — Cinematic Scroll
   Palette: Void Noir / Crimson / Deep Purple / Silver
*/

:root {
    /* === Base Neutrals (60%) === */
    --void: #0A0A0A;
    --charcoal: #0E0E0E;
    --slate: #1A1A1A;
    --steel: #2C2C2C;
    --ash: #4A4A4A;
    --smoke: #A0A0A0;
    --cloud: #D0D0D0;
    --bone: #ECECEC;
    --snow: #FAFAFA;

    /* === Crimson Family (30%) === */
    --crimson-deep: #6B1A1A;
    --crimson: #8B1A1A;
    --crimson-bright: #CC2233;
    --crimson-glow: rgba(139, 26, 26, 0.15);
    --crimson-blush: rgba(204, 34, 51, 0.06);

    /* === Deep Purple Family (10%) === */
    --purple-abyss: #0F0A15;
    --purple-deep: #2D1B4E;
    --purple-orchid: #6B2D5B;
    --purple-accent: #4B0082;
    --purple-glow: rgba(75, 0, 130, 0.12);
    --purple-mist: rgba(107, 45, 91, 0.06);

    /* === Warm Accents === */
    --amber-edge: rgba(218, 165, 32, 0.06);
    --copper: #8B4513;

    /* === Legacy compat === */
    --surface-dark: var(--void);
    --surface-glass: rgba(14, 14, 14, 0.65);
    --text-primary: var(--bone);
    --text-secondary: var(--smoke);
    --text-accent: var(--cloud);
    --border-light: rgba(255, 255, 255, 0.08);

    /* === Typography === */
    --font-heading: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --font-mono: 'Courier New', Courier, monospace;

    /* === Section accent (overridden per section via data-mood) === */
    --section-accent: var(--cloud);
    --section-glow: rgba(255, 255, 255, 0.04);
}

/* Reset */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: var(--font-body);
}

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--void);
    color: var(--text-primary);
    overflow-x: hidden;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   SCROLL PROGRESS BAR
   ============================================ */
.scroll-progress {
    position: fixed;
    top: 0;
    left: 0;
    width: 0%;
    height: 2px;
    background: linear-gradient(90deg, var(--crimson) 0%, var(--purple-orchid) 50%, var(--crimson-bright) 100%);
    z-index: 10000;
    transition: width 0.05s linear;
}

/* ============================================
   DYNAMIC BACKGROUND
   ============================================ */
.bg-layer {
    position: fixed;
    top: 0;
    left: 0;
    width: 110vw;
    height: 110vh;
    background-image: url('../images/colin-carter-w1g2o4J_4Dg-unsplash_copy.jpg');
    background-size: cover;
    background-position: center;
    z-index: -3;
    animation: slowPan 40s linear infinite alternate;
}

.bg-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: linear-gradient(135deg, rgba(8, 7, 7, 0.88) 0%, rgba(10, 10, 10, 0.82) 100%);
    z-index: -2;
}

@keyframes slowPan {
    0% { transform: scale(1) translate(0, 0); }
    100% { transform: scale(1.05) translate(-2%, -2%); }
}

#ambient-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: -2;
    pointer-events: none;
    /* Subtle radial dimming for edges, no mix-blend-mode so text remains bright */
    background: radial-gradient(circle at center, transparent 30%, rgba(0, 0, 0, 0.4) 100%);
}



/* ============================================
   TYPOGRAPHY HIERARCHY
   ============================================ */
h1,
h2,
h3,
h4 {
    font-family: var(--font-heading);
    font-weight: 300;
    letter-spacing: -0.02em;
    color: var(--snow);
}

.display-lg {
    font-size: clamp(3rem, 7vw, 5rem);
    line-height: 1.05;
    letter-spacing: -0.03em;
    font-weight: 200;
}

.display-md {
    font-size: clamp(1.5rem, 3vw, 2.5rem);
    line-height: 1.2;
    font-weight: 300;
}

.display-sm {
    font-size: clamp(1.1rem, 2vw, 1.4rem);
    line-height: 1.4;
    font-weight: 300;
}

.body-md {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 650px;
    line-height: 1.8;
}

.label-sm {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--text-accent);
}

/* Section headings — clip-path reveal */
.section-heading {
    clip-path: inset(0 100% 0 0);
    transition: clip-path 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.section-heading.revealed {
    clip-path: inset(0 0 0 0);
}

.section-divider {
    width: 60px;
    height: 1px;
    background: var(--section-accent);
    margin: 2rem 0;
    opacity: 0.4;
    transition: background 0.6s ease;
}

/* ============================================
   GLASS PANELS — Base + Variants
   ============================================ */
.glass-panel {
    background: var(--surface-glass);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border: 1px solid var(--border-light);
    border-radius: 4px;
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4);
    position: relative;
    overflow: hidden;
    transition: box-shadow 0.4s ease, border-color 0.4s ease, transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.glass-panel::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(800px circle at var(--mouse-x, 50%) var(--mouse-y, 50%),
            rgba(255, 255, 255, 0.06),
            transparent 40%);
    z-index: 0;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.5s ease;
}

.glass-panel:hover::before {
    opacity: 1;
}

.glass-panel>* {
    position: relative;
    z-index: 1;
}

/* Crimson variant (Problem section) */
.glass-panel--crimson {
    border-color: rgba(139, 26, 26, 0.25);
}

.glass-panel--crimson:hover {
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4), 0 0 40px var(--crimson-glow);
    border-color: rgba(139, 26, 26, 0.4);
}

/* Purple variant (Solution/Team section) */
.glass-panel--purple {
    border-color: rgba(75, 0, 130, 0.15);
}

.glass-panel--purple:hover {
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4), 0 0 40px var(--purple-glow);
    border-color: rgba(75, 0, 130, 0.3);
}

/* ============================================
   NAVIGATION — Sticky Tab-Style
   ============================================ */
.hud-nav {
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    padding: 1.5rem 0;
    transition: all 0.4s ease;
    border-bottom: 1px solid transparent;
    background: transparent;
    backdrop-filter: none;
    -webkit-backdrop-filter: none;
}

.hud-nav.scrolled {
    padding: 1rem 0;
    background: rgba(10, 10, 10, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-light);
}

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

.ryoushi-brand {
    display: flex;
    align-items: center;
    gap: 1rem;
    text-decoration: none;
    color: var(--snow);
}

.nav-logo {
    height: 32px;
    opacity: 0.9;
}

.brand-text {
    font-weight: 400;
    letter-spacing: 0.1em;
    font-size: 0.9rem;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 2.5rem;
}

.nav-links a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    transition: color 0.3s ease;
    position: relative;
    padding-bottom: 4px;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--snow);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0%;
    height: 1px;
    background: linear-gradient(90deg, var(--crimson-bright), var(--purple-orchid));
    transition: width 0.3s ease;
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn-primary {
    display: inline-block;
    padding: 0.9rem 2.2rem;
    background: rgba(255, 255, 255, 0.05);
    color: var(--snow);
    border: 1px solid var(--border-light);
    border-radius: 100px;
    text-decoration: none;
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    transition: all 0.3s ease;
    backdrop-filter: blur(5px);
}

.btn-primary:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.3);
    transform: translateY(-2px);
}

.btn-crimson {
    border-color: rgba(139, 26, 26, 0.4);
}

.btn-crimson:hover {
    background: rgba(139, 26, 26, 0.15);
    border-color: var(--crimson);
    box-shadow: 0 0 30px var(--crimson-glow);
}

.btn-purple {
    border-color: rgba(75, 0, 130, 0.3);
}

.btn-purple:hover {
    background: rgba(75, 0, 130, 0.12);
    border-color: var(--purple-orchid);
    box-shadow: 0 0 30px var(--purple-glow);
}

/* ============================================
   SECTIONS — General
   ============================================ */
.container {
    width: 90%;
    max-width: 1400px;
    margin: 0 auto;
}

section {
    position: relative;
    z-index: 5;
    padding: 140px 0;
    transition: background-color 0.8s ease;
}

.grid-strata {
    display: grid;
    gap: 2.5rem;
}

/* ============================================
   HERO — "The Arrival"
   ============================================ */
#hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    position: relative;
}

.hero-content {
    position: relative;
    z-index: 10;
    max-width: 800px;
}

.hero-tagline {
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 200;
    letter-spacing: -0.04em;
    line-height: 1.0;
    color: var(--snow);
    margin-bottom: 2rem;
}

.hero-sub {
    font-size: 1.15rem;
    color: var(--smoke);
    line-height: 1.8;
    max-width: 600px;
    margin-bottom: 3rem;
}

.hero-buttons {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* ============================================
   ABOUT — "The Origin"
   ============================================ */
#about {
    --section-accent: var(--smoke);
}

.about-prose {
    max-width: 700px;
    font-size: 1.1rem;
    color: var(--bone);
    line-height: 2;
}

/* ============================================
   PROBLEM — "The Fracture"
   ============================================ */
#problem {
    --section-accent: var(--crimson);
}

.problem-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.gap-card {
    padding: 3rem;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s ease;
}

.gap-card:hover {
    transform: translateY(-5px);
}

.gap-card .gap-number {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--crimson-bright);
    margin-bottom: 1rem;
    display: block;
}

.gap-card h3 {
    color: var(--snow);
    margin-bottom: 1rem;
    font-size: 1.4rem;
}

.gap-card p {
    color: var(--smoke);
    line-height: 1.8;
}

/* ============================================
   SOLUTION — "The Constellation"
   ============================================ */
#solution {
    --section-accent: var(--purple-orchid);
}

.solution-panel {
    max-width: 800px;
    margin: 3rem auto 0;
    padding: 3.5rem;
    border-image: linear-gradient(135deg, rgba(139, 26, 26, 0.3), rgba(75, 0, 130, 0.3)) 1;
    border-width: 1px;
    border-style: solid;
    border-radius: 4px;
    background: rgba(15, 10, 21, 0.5);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
}

.solution-panel h3 {
    font-size: 1.8rem;
    margin-bottom: 0.5rem;
}

.solution-panel .product-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--purple-orchid);
    margin-bottom: 1.5rem;
    display: block;
}

.solution-features {
    list-style: none;
    margin-top: 2rem;
}

.solution-features li {
    padding: 0.8rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.04);
    color: var(--bone);
    font-size: 0.95rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.solution-features li::before {
    content: '→';
    color: var(--purple-orchid);
    flex-shrink: 0;
}

/* ============================================
   WORKFLOW PIPELINE
   ============================================ */
.workflow-pipeline {
    display: flex;
    align-items: flex-start;
    justify-content: center;
    gap: 0;
    flex-wrap: wrap;
}

.workflow-step {
    flex: 1;
    min-width: 150px;
    max-width: 200px;
    padding: 1.5rem 1rem;
    text-align: center;
}

.workflow-number {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    color: var(--purple-orchid);
    display: block;
    margin-bottom: 0.5rem;
}

.workflow-step h4 {
    font-size: 1.1rem;
    font-weight: 400;
    color: var(--snow);
    margin-bottom: 0.5rem;
}

.workflow-step p {
    font-size: 0.85rem;
    color: var(--smoke);
    line-height: 1.6;
}

.workflow-connector {
    width: 40px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--purple-orchid), transparent);
    align-self: center;
    margin-top: -1rem;
    flex-shrink: 0;
}

/* ============================================
   PRODUCT FEATURES GRID
   ============================================ */
.product-features-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.product-feature-card {
    padding: 2rem;
    text-align: left;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.4s ease;
}

.product-feature-card:hover {
    transform: translateY(-4px);
}

.product-feature-card h4 {
    font-size: 1.1rem;
    font-weight: 400;
    color: var(--snow);
    margin-bottom: 0.6rem;
}

.product-feature-card p {
    font-size: 0.9rem;
    color: var(--smoke);
    line-height: 1.7;
}

/* ============================================
   MARKET STATS
   ============================================ */
.market-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 2rem;
    padding: 2.5rem 0;
    border-top: 1px solid var(--border-light);
    border-bottom: 1px solid var(--border-light);
}

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

.stat-value {
    display: block;
    font-size: clamp(1.8rem, 3vw, 2.4rem);
    font-weight: 200;
    color: var(--snow);
    letter-spacing: -0.02em;
    margin-bottom: 0.4rem;
}

.stat-label {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--smoke);
    line-height: 1.5;
}

/* ============================================
   RESEARCH — "The Lab"
   ============================================ */
#research {
    --section-accent: var(--ash);
}

.research-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-top: 3rem;
}

.research-card {
    padding: 2.5rem;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), background 0.4s ease;
    position: relative;
}

.research-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 50%, rgba(255, 255, 255, 0.015) 0%, transparent 70%);
    pointer-events: none;
}

.research-card:hover {
    transform: translateY(-5px);
    background: rgba(25, 25, 30, 0.55);
}

.research-card .status-dot {
    display: inline-block;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--crimson-bright);
    margin-right: 8px;
    animation: pulse-dot 2s ease-in-out infinite;
}

@keyframes pulse-dot {

    0%,
    100% {
        opacity: 1;
    }

    50% {
        opacity: 0.3;
    }
}

.research-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.8rem;
    color: var(--snow);
}

.research-card p {
    color: var(--smoke);
    font-size: 0.95rem;
    line-height: 1.7;
}

/* ============================================
   TEAM — "The Architects"
   ============================================ */
#team {
    --section-accent: var(--purple-orchid);
}

.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2.5rem;
    margin-top: 3rem;
}

.team-card {
    padding: 3rem;
    perspective: 1000px;
    transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.5s ease;
    will-change: transform;
}

.team-card:hover {
    box-shadow: 0 30px 60px rgba(0, 0, 0, 0.4), 0 0 50px var(--purple-glow);
}

.team-card .member-role {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--purple-orchid);
    margin-bottom: 0.8rem;
    display: block;
}

.team-card .member-name {
    font-size: 1.6rem;
    font-weight: 300;
    color: var(--snow);
    margin-bottom: 0.5rem;
    letter-spacing: -0.01em;
}

.team-card .member-affiliation {
    font-size: 0.85rem;
    color: var(--cloud);
    margin-bottom: 1.2rem;
    font-style: italic;
}

.team-card .member-bio {
    color: var(--smoke);
    font-size: 0.95rem;
    line-height: 1.8;
}

/* ============================================
   CONTACT / FOOTER — "The Horizon"
   ============================================ */
#contact {
    padding: 100px 0 60px;
}

.footer-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 3rem;
    border-top: 1px solid var(--border-light);
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--smoke);
    text-decoration: none;
    font-size: 0.85rem;
    letter-spacing: 0.05em;
    transition: color 0.3s ease;
}

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

.footer-location {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--ash);
    letter-spacing: 0.1em;
}

/* ============================================
   ANIMATIONS
   ============================================ */
.fade-up {
    opacity: 0;
    transform: translateY(40px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* Staggered children */
.stagger-children>* {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.stagger-children.visible>*:nth-child(1) {
    transition-delay: 0.1s;
}

.stagger-children.visible>*:nth-child(2) {
    transition-delay: 0.2s;
}

.stagger-children.visible>*:nth-child(3) {
    transition-delay: 0.3s;
}

.stagger-children.visible>*:nth-child(4) {
    transition-delay: 0.4s;
}

.stagger-children.visible>* {
    opacity: 1;
    transform: translateY(0);
}

/* Slide from left */
.slide-left {
    opacity: 0;
    transform: translateX(-60px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.slide-left.visible {
    opacity: 1;
    transform: translateX(0);
}

/* Slide from right */
.slide-right {
    opacity: 0;
    transform: translateX(60px);
    transition: opacity 0.7s cubic-bezier(0.16, 1, 0.3, 1), transform 0.7s cubic-bezier(0.16, 1, 0.3, 1);
}

.slide-right.visible {
    opacity: 1;
    transform: translateX(0);
}

/* ============================================
   PREMIUM AWWWARDS ENHANCEMENTS
   ============================================ */

/* Cinematic Film Grain Overlay */
.film-grain {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    pointer-events: none;
    z-index: 9998; /* Just below cursor, above UI */
    opacity: 0.04;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='3' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .display-lg,
    .hero-tagline {
        font-size: 2.5rem;
    }

    .research-card,
    .gap-card {
        padding: 2rem;
    }

    .team-card {
        padding: 2rem;
    }

    .solution-panel {
        padding: 2rem;
    }

    section {
        padding: 80px 0;
    }

    .footer-inner {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }

    .problem-grid,
    .research-grid,
    .team-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .hero-tagline {
        font-size: 2rem;
    }

    .hero-buttons {
        flex-direction: column;
    }
}