/* ========================================
   RESET & BASE
   ======================================== */

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

:root {
    --color-dark: #0C0D18;
    --color-accent: #F2773C;
    --color-light: #FFFFFF;
    --color-text: #1a1a1a;
    --color-text-light: #8a8a8a;

    --font-primary: 'Montserrat', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-heading: 'Playfair Display', 'Times New Roman', serif;

    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;

    /* Editorial easing — slower start, decisive finish */
    --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
    --ease-in-out-quart: cubic-bezier(0.76, 0, 0.24, 1);
    --transition: all 0.5s var(--ease-out-expo);
    --transition-fast: all 0.25s ease;
}

html {
    font-size: 16px;
    background: var(--color-dark);
    scroll-behavior: auto; /* scroll-behavior:smooth fights the scrub */
}

body {
    font-family: var(--font-primary);
    font-weight: 400;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-dark);
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

a {
    text-decoration: none;
    color: inherit;
    transition: var(--transition-fast);
}

::selection {
    background: var(--color-accent);
    color: var(--color-light);
}

/* ========================================
   NAVIGATION
   ======================================== */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: linear-gradient(180deg, rgba(0, 0, 0, 0.45) 0%, rgba(0, 0, 0, 0) 100%);
    transition: var(--transition);
}

.nav-container {
    max-width: 100%;
    margin: 0 auto;
    padding: 1.25rem var(--spacing-lg);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    display: flex;
    align-items: center;
    transition: var(--transition-fast);
}

.logo-img {
    height: 18px;
    width: auto;
    filter: brightness(0) invert(1);
    transition: var(--transition-fast);
}

.nav-logo:hover .logo-img { opacity: 0.75; }

.nav-meta {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.nav-meta-line {
    color: rgba(255, 255, 255, 0.55);
    font-size: 0.7rem;
    letter-spacing: 0.32em;
    text-transform: uppercase;
    font-weight: 400;
}

.nav-cta {
    position: relative;
    padding: 0.7rem 1.4rem;
    color: var(--color-light);
    font-size: 0.7rem;
    font-weight: 500;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    border: 1px solid rgba(255, 255, 255, 0.4);
    border-radius: 50px;
    transition: var(--transition);
    overflow: hidden;
}

.nav-cta::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--color-accent);
    transform: translateY(101%);
    transition: transform 0.5s var(--ease-out-expo);
    z-index: -1;
}

.nav-cta:hover {
    border-color: var(--color-accent);
    color: var(--color-light);
}

.nav-cta:hover::before {
    transform: translateY(0);
}

/* ========================================
   BUTTONS — ghost/editorial
   ======================================== */

.btn-ghost {
    display: inline-flex;
    align-items: center;
    gap: 0.85rem;
    padding: 1.1rem 0 1.1rem 0;
    margin-top: var(--spacing-md);
    color: var(--color-light);
    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.28em;
    text-transform: uppercase;
    border-bottom: 1px solid rgba(255, 255, 255, 0.4);
    transition: color 0.4s var(--ease-out-expo), border-color 0.4s var(--ease-out-expo);
    cursor: pointer;
}

.btn-ghost svg {
    transition: transform 0.5s var(--ease-out-expo);
}

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

.btn-ghost:hover svg {
    transform: translateX(6px);
}

/* ========================================
   CINEMATIC STAGE
   ======================================== */

.cinematic {
    position: relative;
    /* Stage locks at viewport height — scrolling drives the video frame-by-frame
       via wheel/touch capture in script.js, not via page scroll position. */
    height: 100vh;
    background: var(--color-dark);
}

.cinematic-sticky {
    position: sticky;
    top: 0;
    width: 100%;
    height: 100vh;
    overflow: hidden;
    background: var(--color-dark);
}

.cinematic-video {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    z-index: 0;
    pointer-events: none;
    will-change: transform;
}

/* Vignette: subtle edge darkening for cinematic frame */
.cinematic-vignette {
    position: absolute;
    inset: 0;
    z-index: 1;
    pointer-events: none;
    background:
        radial-gradient(ellipse 90% 75% at center, transparent 35%, rgba(0, 0, 0, 0.65) 100%),
        linear-gradient(180deg, rgba(0, 0, 0, 0.45) 0%, rgba(0, 0, 0, 0.05) 30%, rgba(0, 0, 0, 0.15) 70%, rgba(0, 0, 0, 0.7) 100%);
}

/* Film grain — SVG noise, mix-blended for tactile feel */
.cinematic-grain {
    position: absolute;
    inset: 0;
    z-index: 2;
    pointer-events: none;
    opacity: 0.22;
    mix-blend-mode: overlay;
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='240' height='240'><filter id='n'><feTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' stitchTiles='stitch' seed='5'/><feColorMatrix values='0 0 0 0 0  0 0 0 0 0  0 0 0 0 0  0 0 0 0.55 0'/></filter><rect width='100%25' height='100%25' filter='url(%23n)'/></svg>");
    background-size: 240px 240px;
    animation: grainShift 8s steps(8) infinite;
}

@keyframes grainShift {
    0%   { transform: translate(0, 0); }
    12%  { transform: translate(-5%, -3%); }
    25%  { transform: translate(3%, -5%); }
    37%  { transform: translate(-3%, 4%); }
    50%  { transform: translate(5%, 2%); }
    62%  { transform: translate(-4%, -2%); }
    75%  { transform: translate(2%, 5%); }
    87%  { transform: translate(-2%, -4%); }
    100% { transform: translate(0, 0); }
}

/* Right-edge chapter index */
.cinematic-index {
    position: absolute;
    right: var(--spacing-lg);
    top: 50%;
    transform: translateY(-50%);
    z-index: 5;
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
    pointer-events: none;
}

.cinematic-index-item {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 0.85rem;
    font-family: var(--font-primary);
    font-size: 0.72rem;
    font-weight: 500;
    letter-spacing: 0.32em;
    color: rgba(255, 255, 255, 0.55);
    text-shadow:
        0 0 3px rgba(0, 0, 0, 0.95),
        0 1px 8px rgba(0, 0, 0, 0.8),
        0 2px 18px rgba(0, 0, 0, 0.5);
    transition: color 0.6s var(--ease-out-expo);
}

.cinematic-index-line {
    display: block;
    width: 0;
    height: 1px;
    background: var(--color-accent);
    transition: width 0.6s var(--ease-out-expo);
}

.cinematic-index-num {
    transition: color 0.6s var(--ease-out-expo);
    min-width: 1.6em;
    text-align: right;
}

.cinematic-index-item.is-active { color: var(--color-light); }
.cinematic-index-item.is-active .cinematic-index-line { width: 32px; }
.cinematic-index-item.is-active .cinematic-index-num { color: var(--color-accent); }

/* Bottom progress — hairline */
.cinematic-progress {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 1px;
    background: rgba(255, 255, 255, 0.08);
    z-index: 6;
    overflow: hidden;
}

.cinematic-progress-bar {
    display: block;
    height: 100%;
    width: 0%;
    background: var(--color-accent);
    will-change: width;
}

/* Scroll hint, bottom-center, fades after first scroll */
.cinematic-hint {
    position: absolute;
    left: 50%;
    bottom: 2.5rem;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.85rem;
    z-index: 5;
    pointer-events: none;
    transition: opacity 0.6s var(--ease-out-expo), transform 0.6s var(--ease-out-expo);
}

.cinematic-hint.is-hidden {
    opacity: 0;
    transform: translateX(-50%) translateY(8px);
}

.cinematic-hint-text {
    color: rgba(255, 255, 255, 0.7);
    font-size: 0.65rem;
    font-weight: 500;
    letter-spacing: 0.42em;
    text-transform: uppercase;
    font-family: var(--font-primary);
}

.cinematic-hint-line {
    display: block;
    width: 1px;
    height: 36px;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0.7) 0%, rgba(255, 255, 255, 0) 100%);
    animation: hintGlide 2.4s var(--ease-in-out-quart) infinite;
    transform-origin: top;
}

@keyframes hintGlide {
    0%, 100% { transform: scaleY(0.2); opacity: 0.3; }
    50%      { transform: scaleY(1);   opacity: 1; }
}

/* ========================================
   SCENES — bottom-left editorial composition
   ======================================== */

.cinematic-scene {
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    padding: 0 var(--spacing-lg) 7rem;
    z-index: 4;
    color: var(--color-light);
    opacity: 0;
    transform: translateY(12px);
    transition: opacity 0.7s var(--ease-out-expo), transform 0.7s var(--ease-out-expo);
    pointer-events: none;
    max-width: min(900px, 80vw);
}

.cinematic-scene.is-active {
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
}

.cinematic-scene-label {
    display: inline-block;
    margin-bottom: var(--spacing-md);
    font-family: var(--font-primary);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.42em;
    text-transform: uppercase;
    color: var(--color-accent);
    /* Layered dark halo so the orange reads over any video frame, light or dark */
    text-shadow:
        0 0 1px rgba(0, 0, 0, 1),
        0 0 4px rgba(0, 0, 0, 0.95),
        0 1px 3px rgba(0, 0, 0, 0.9),
        0 2px 14px rgba(0, 0, 0, 0.85),
        0 4px 28px rgba(0, 0, 0, 0.55);
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.6s var(--ease-out-expo) 0.05s, transform 0.6s var(--ease-out-expo) 0.05s;
}

.cinematic-scene.is-active .cinematic-scene-label {
    opacity: 1;
    transform: translateY(0);
}

.cinematic-scene-headline {
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: clamp(2.5rem, 7.5vw, 7.25rem);
    line-height: 0.98;
    letter-spacing: -0.018em;
    color: var(--color-light);
    text-shadow: 0 12px 60px rgba(0, 0, 0, 0.45);
}

.cinematic-scene-headline em {
    font-style: italic;
    font-weight: 500;
    color: var(--color-light);
    /* Inline em — characters inside inherit reveal */
}

.cinematic-scene-headline .word {
    display: inline-block;
    opacity: 0;
    transform: translateY(0.7em);
    transition: opacity 0.4s var(--ease-out-expo), transform 0.4s var(--ease-out-expo);
    will-change: opacity, transform;
}

.cinematic-scene.is-active .cinematic-scene-headline .word {
    opacity: 1;
    transform: translateY(0);
    transition:
        opacity 0.85s var(--ease-out-expo) calc(0.18s + var(--i) * 90ms),
        transform 0.85s var(--ease-out-expo) calc(0.18s + var(--i) * 90ms);
}

.cinematic-scene-body {
    margin-top: var(--spacing-md);
    max-width: 36ch;
    font-size: 0.95rem;
    line-height: 1.6;
    font-weight: 300;
    color: rgba(255, 255, 255, 0.78);
    letter-spacing: 0.02em;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.7s var(--ease-out-expo), transform 0.7s var(--ease-out-expo);
}

.cinematic-scene.is-active .cinematic-scene-body {
    opacity: 1;
    transform: translateY(0);
    transition-delay: 0.5s;
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
    background: #000;
    color: var(--color-light);
    padding: var(--spacing-xl) 0 var(--spacing-lg);
    position: relative;
    z-index: 10;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

.footer-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.footer-logo {
    height: 26px;
    width: auto;
    filter: brightness(0) invert(1);
    margin-bottom: 0.9rem;
    display: block;
}

.footer-brand p {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.72rem;
    letter-spacing: 0.32em;
    text-transform: uppercase;
}

.footer-cta {
    position: relative;
    display: inline-flex;
    align-items: center;
    gap: 0.85rem;
    padding: 0.5rem 0;
    color: var(--color-light);
    font-family: var(--font-primary);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.3em;
    text-transform: uppercase;
}

.footer-cta-text {
    position: relative;
    display: inline-block;
    padding-bottom: 0.45rem;
}

/* Static baseline underline */
.footer-cta-text::before {
    content: '';
    position: absolute;
    left: 0;
    right: 0;
    bottom: 0;
    height: 1px;
    background: rgba(255, 255, 255, 0.22);
}

/* Animated accent underline — sweeps left → right on hover */
.footer-cta-text::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: 0;
    width: 100%;
    height: 1px;
    background: var(--color-accent);
    transform: scaleX(0);
    transform-origin: left center;
    transition: transform 0.7s var(--ease-out-expo);
}

.footer-cta-arrow {
    transition: transform 0.6s var(--ease-out-expo), color 0.4s ease;
    color: rgba(255, 255, 255, 0.7);
}

.footer-cta:hover .footer-cta-text::after { transform: scaleX(1); }
.footer-cta:hover .footer-cta-arrow {
    transform: translateX(8px);
    color: var(--color-accent);
}

.footer-bottom {
    padding-top: var(--spacing-md);
    text-align: center;
}

.footer-bottom p {
    color: rgba(255, 255, 255, 0.35);
    font-size: 0.7rem;
    letter-spacing: 0.32em;
    text-transform: uppercase;
}

/* ========================================
   RESPONSIVE
   ======================================== */

@media (max-width: 1024px) {
    .nav-container { padding: 1rem var(--spacing-md); }
    .cinematic-scene { padding: 0 var(--spacing-md) 6rem; }
    .cinematic-index { right: var(--spacing-md); gap: 1rem; }
}

@media (max-width: 768px) {
    :root {
        --spacing-lg: 2.5rem;
        --spacing-xl: 3.5rem;
    }

    .nav-container { padding: 0.85rem var(--spacing-sm); }
    .logo-img { height: 15px; }
    .nav-meta-line { display: none; }
    .nav-cta { padding: 0.6rem 1.1rem; font-size: 0.62rem; letter-spacing: 0.24em; }

    .cinematic-scene {
        padding: 0 var(--spacing-md) 5rem;
        max-width: 100%;
    }

    .cinematic-scene-label {
        font-size: 0.62rem;
        letter-spacing: 0.36em;
        margin-bottom: var(--spacing-sm);
    }

    .cinematic-scene-headline {
        font-size: clamp(2rem, 11vw, 4rem);
    }

    .cinematic-scene-body {
        font-size: 0.85rem;
    }

    .cinematic-index { display: none; }
    .cinematic-hint { bottom: 1.5rem; }

    .footer-container { padding: 0 var(--spacing-md); }
    .footer-row { flex-direction: column; align-items: flex-start; }
    .footer-logo { height: 22px; }
}

@media (max-width: 480px) {
    .logo-img { height: 13px; }
    .nav-cta { padding: 0.55rem 0.95rem; }
    .cinematic-scene-headline { font-size: clamp(1.85rem, 12vw, 3rem); }
}

/* Reduced motion: gentle loop, no scrub */
@media (prefers-reduced-motion: reduce) {
    .cinematic { height: 100vh; }
    .cinematic-sticky { position: relative; }
    .cinematic-scene[data-index="0"] { opacity: 1; transform: none; }
    .cinematic-scene:not([data-index="0"]) { display: none; }
    .cinematic-scene[data-index="0"] .word,
    .cinematic-scene[data-index="0"] .cinematic-scene-label,
    .cinematic-scene[data-index="0"] .cinematic-scene-body {
        opacity: 1; transform: none; transition: none;
    }
    .cinematic-hint-line, .cinematic-grain { animation: none; }
}