/* =========================================================
   demo.css — cineshader-style fullscreen layout
   ========================================================= */

html, body {
    height: 100%;
    overflow: hidden;          /* the demo is a single-screen experience */
    background: #000;
}

body.demo {
    cursor: default;
}

.demo-stage {
    position: fixed;
    inset: 0;
    overflow: hidden;
}

/* ------------- canvas ------------- */
.demo-canvas {
    position: absolute;
    inset: 0;
    z-index: 0;
}

.demo-canvas canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
}

/* ------------- top nav ------------- */
.demo-nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 10;
    padding: clamp(1.25rem, 2.5vw, 2rem) clamp(1.5rem, 4vw, 3rem);
    display: flex;
    justify-content: space-between;
    align-items: center;
    mix-blend-mode: difference;
}

.demo-nav__brand {
    font-family: var(--font-serif);
    font-size: 0.95rem;
    letter-spacing: 0.02em;
    color: var(--ink);
}

.demo-nav__brand em {
    font-style: italic;
    color: var(--ink-soft);
}

.demo-nav__menu {
    display: flex;
    align-items: center;
    gap: clamp(1.25rem, 2.5vw, 2.5rem);
}

.demo-nav__link {
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.22em;
    color: var(--ink);
    opacity: 0.75;
    transition: opacity 0.3s var(--ease-soft);
}

.demo-nav__link:hover { opacity: 1; }

.demo-nav__link.is-active {
    opacity: 1;
}

.demo-nav__link.is-active::after {
    content: '';
    display: block;
    height: 1px;
    margin-top: 5px;
    background: var(--ink);
}

/* small signal/audio icon (decorative) */
.demo-nav__signal {
    display: inline-flex;
    align-items: flex-end;
    gap: 2px;
    height: 14px;
    margin-right: 0.6rem;
    opacity: 0.6;
}

.demo-nav__signal span {
    display: block;
    width: 3px;
    background: var(--ink);
    border-radius: 1px;
    animation: signal 1.4s var(--ease-soft) infinite;
}
.demo-nav__signal span:nth-child(1) { height: 30%; animation-delay: 0s; }
.demo-nav__signal span:nth-child(2) { height: 55%; animation-delay: 0.15s; }
.demo-nav__signal span:nth-child(3) { height: 80%; animation-delay: 0.30s; }
.demo-nav__signal span:nth-child(4) { height: 100%; animation-delay: 0.45s; }

@keyframes signal {
    0%, 100% { transform: scaleY(0.4); transform-origin: bottom; opacity: 0.4; }
    50%      { transform: scaleY(1.0); transform-origin: bottom; opacity: 1; }
}

/* ------------- overlay: title + description ------------- */
.demo-overlay {
    position: fixed;
    z-index: 5;
    left: clamp(1.5rem, 5vw, 5rem);
    top: 50%;
    transform: translateY(-50%);
    max-width: 540px;
    color: var(--ink);
    pointer-events: none;
}

.demo-overlay__counter {
    font-family: var(--font-sans);
    font-size: 0.72rem;
    letter-spacing: 0.35em;
    color: var(--ink-soft);
    text-transform: uppercase;
    margin-bottom: var(--space-3);
}

.demo-overlay__counter strong {
    color: var(--ink);
    font-weight: 400;
}

.demo-overlay__title {
    font-family: var(--font-serif);
    font-weight: 300;
    font-size: clamp(2.2rem, 5vw, 4rem);
    line-height: 1;
    letter-spacing: -0.03em;
    margin-bottom: var(--space-3);
    will-change: transform, opacity;
}

.demo-overlay__desc {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--ink-soft);
    margin-bottom: var(--space-3);
    max-width: 460px;
    will-change: transform, opacity;
}

.demo-overlay__cta {
    pointer-events: auto;
    display: inline-flex;
    align-items: center;
    gap: 0.7rem;
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.22em;
    color: var(--ink);
    padding: 0.7rem 0;
    border-bottom: 1px solid var(--line-strong);
    transition: color 0.4s var(--ease-soft), border-color 0.4s var(--ease-soft);
}

.demo-overlay__cta::after {
    content: '→';
    transition: transform 0.4s var(--ease-soft);
}

.demo-overlay__cta:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.demo-overlay__cta:hover::after {
    transform: translateX(6px);
}

/* ------------- side controls (prev / next) ------------- */
.demo-controls {
    position: fixed;
    right: clamp(1.5rem, 4vw, 3rem);
    top: 50%;
    transform: translateY(-50%);
    z-index: 6;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.demo-control {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: 1px solid var(--line-strong);
    color: var(--ink);
    background: rgba(10, 10, 12, 0.35);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s var(--ease-soft), border-color 0.3s var(--ease-soft), transform 0.4s var(--ease-soft);
    cursor: pointer;
}

.demo-control:hover {
    background: rgba(255, 255, 255, 0.08);
    border-color: var(--ink);
    transform: scale(1.05);
}

.demo-control svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    fill: none;
    stroke-width: 1.2;
}

/* ------------- bottom indicator ------------- */
.demo-indicator {
    position: fixed;
    bottom: clamp(1.5rem, 4vh, 2.5rem);
    left: 50%;
    transform: translateX(-50%);
    z-index: 6;
    display: flex;
    align-items: center;
    gap: var(--space-2);
}

.demo-indicator__count {
    font-family: var(--font-sans);
    font-size: 0.72rem;
    letter-spacing: 0.25em;
    color: var(--ink-soft);
    text-transform: uppercase;
}

.demo-indicator__current { color: var(--ink); }

.demo-indicator__dots {
    display: flex;
    gap: 0.5rem;
}

.demo-indicator__dot {
    width: 26px;
    height: 2px;
    background: var(--line-strong);
    cursor: pointer;
    transition: background 0.4s var(--ease-soft), transform 0.4s var(--ease-soft);
    border: 0;
    padding: 0;
}

.demo-indicator__dot:hover {
    background: var(--ink-soft);
}

.demo-indicator__dot.is-active {
    background: var(--ink);
    transform: scaleY(2);
}

/* ------------- corner badges ------------- */
.demo-badge {
    position: fixed;
    z-index: 5;
    font-family: var(--font-sans);
    font-size: 0.7rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--ink-soft);
    pointer-events: none;
}

.demo-badge--tl { top: 50%; left: clamp(1rem, 2vw, 2rem); transform: translateY(-50%) rotate(-90deg); transform-origin: left top; }
.demo-badge--br { bottom: clamp(1.5rem, 4vh, 2.5rem); right: clamp(1.5rem, 4vw, 3rem); }

/* ------------- hamburger toggle (mobile) ------------- */
.demo-nav__toggle {
    display: none;
    position: relative;
    width: 32px;
    height: 24px;
    margin: 0;
    padding: 0;
    background: transparent;
    border: 0;
    cursor: pointer;
    pointer-events: auto;
    z-index: 102;
}

.demo-nav__toggle span {
    position: absolute;
    left: 4px;
    right: 4px;
    height: 1px;
    background: var(--ink);
    transition: transform 0.4s var(--ease-soft), top 0.4s var(--ease-soft);
}

.demo-nav__toggle span:nth-child(1) { top: 9px; }
.demo-nav__toggle span:nth-child(2) { top: 15px; }

.is-menu-open .demo-nav__toggle span:nth-child(1) {
    top: 12px;
    transform: rotate(45deg);
}
.is-menu-open .demo-nav__toggle span:nth-child(2) {
    top: 12px;
    transform: rotate(-45deg);
}

/* ------------- responsive ------------- */
@media (max-width: 720px) {
    .demo-overlay {
        bottom: 6rem;
        top: auto;
        transform: none;
        right: clamp(1.5rem, 5vw, 5rem);
    }
    .demo-controls {
        flex-direction: row;
        right: 50%;
        top: auto;
        bottom: 5rem;
        transform: translateX(50%);
    }
    .demo-indicator { bottom: 1rem; }
    .demo-badge--tl { display: none; }

    /* hamburger overlay menu */
    .demo-nav { mix-blend-mode: normal !important; }
    .demo-nav__toggle { display: block; }
    .demo-nav__toggle:focus,
    .demo-nav__toggle:focus-visible,
    .demo-nav__toggle:active {
        outline: none;
        box-shadow: none;
    }
    .demo-nav__signal { display: none; }

    .demo-nav__menu {
        position: fixed;
        top: 0;
        left: 0;
        width: 100vw;
        height: 100vh;
        height: 100dvh;
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: 2.2rem;
        margin: 0;
        padding: 0;
        background: #08080a;
        backdrop-filter: blur(20px);
        -webkit-backdrop-filter: blur(20px);
        z-index: 101;
        isolation: isolate;
        mix-blend-mode: normal !important;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition:
            transform 0.6s var(--ease-organic),
            opacity   0.4s var(--ease-soft),
            visibility 0s linear 0.6s;
        pointer-events: auto;
    }

    .is-menu-open .demo-nav__menu {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
        transition:
            transform 0.6s var(--ease-organic),
            opacity   0.4s var(--ease-soft),
            visibility 0s;
    }

    .demo-nav__menu .demo-nav__link {
        font-family: var(--font-serif);
        font-style: italic;
        font-weight: 300;
        font-size: 2rem;
        letter-spacing: -0.02em;
        text-transform: none;
        opacity: 0;
        transform: translateY(20px);
        transition:
            opacity 0.4s var(--ease-soft),
            transform 0.6s var(--ease-organic);
    }

    .is-menu-open .demo-nav__menu .demo-nav__link {
        opacity: 1;
        transform: translateY(0);
    }

    .is-menu-open .demo-nav__menu .demo-nav__link:nth-child(2) { transition-delay: 0.15s; }
    .is-menu-open .demo-nav__menu .demo-nav__link:nth-child(3) { transition-delay: 0.20s; }
    .is-menu-open .demo-nav__menu .demo-nav__link:nth-child(4) { transition-delay: 0.25s; }
    .is-menu-open .demo-nav__menu .demo-nav__link:nth-child(5) { transition-delay: 0.30s; }
    .is-menu-open .demo-nav__menu .demo-nav__link:nth-child(6) { transition-delay: 0.35s; }

    .demo-nav__menu .demo-nav__link.is-active::after { display: none; }

    body.is-menu-open { overflow: hidden; }
}

/* ------------- preloader ------------- */
.demo-preloader {
    position: fixed;
    inset: 0;
    background: #000;
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 1s var(--ease-soft);
    /* failsafe: fade out even if scripts fail to load */
    animation: demo-preloader-failsafe 0.8s ease 5s forwards;
}

@keyframes demo-preloader-failsafe {
    to { opacity: 0; visibility: hidden; pointer-events: none; }
}

.demo-preloader.is-hidden {
    opacity: 0;
    pointer-events: none;
}

.demo-preloader__inner {
    font-family: var(--font-serif);
    font-style: italic;
    color: var(--ink-soft);
}