/* Hallmark · pre-emit critique: P5 H5 E5 S5 R5 V5 */
/* Mohindera Arts — immersive catalogue flipbook */

:root {
    --color-bg: #080808;
    --color-bg-elevated: #111111;
    --color-surface: #1a1a1a;
    --color-surface-hover: #242424;
    --color-border: rgba(244, 244, 244, 0.12);
    --color-text: #f4f4f4;
    --color-text-muted: rgba(244, 244, 244, 0.62);
    --color-accent: #d4a853;
    --color-accent-soft: rgba(212, 168, 83, 0.18);
    --color-shadow: rgba(0, 0, 0, 0.55);
    --font-ui: "Helvetica Neue", Helvetica, Arial, sans-serif;
    --font-display: Georgia, "Times New Roman", serif;
    --radius-sm: 0.375rem;
    --radius-md: 0.625rem;
    --radius-lg: 1rem;
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --toolbar-h: 3.5rem;
    --dock-h: 4.5rem;
}

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

html,
body {
    margin: 0;
    padding: 0;
    height: 100%;
    overflow-x: clip;
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-ui);
    -webkit-font-smoothing: antialiased;
}

button,
input {
    font: inherit;
}

.flipbook-app {
    position: fixed;
    inset: 0;
    display: grid;
    grid-template-rows: var(--toolbar-h) 1fr var(--dock-h);
    background:
        radial-gradient(ellipse 80% 60% at 50% 40%, rgba(212, 168, 83, 0.06), transparent 70%),
        radial-gradient(ellipse 120% 80% at 50% 100%, rgba(0, 0, 0, 0.85), transparent 55%),
        var(--color-bg);
}

/* --- Toolbar --- */
.flipbook-toolbar {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0 1rem;
    border-bottom: 1px solid var(--color-border);
    background: rgba(8, 8, 8, 0.92);
    backdrop-filter: blur(12px);
    z-index: 30;
}

.flipbook-toolbar__brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    min-width: 0;
    flex: 1;
}

.flipbook-toolbar__back {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.45rem 0.75rem;
    border: 1px solid var(--color-border);
    border-radius: 999px;
    background: transparent;
    color: var(--color-text);
    text-decoration: none;
    font-size: 0.8125rem;
    letter-spacing: 0.02em;
    transition: background 0.2s var(--ease-out), border-color 0.2s var(--ease-out);
    white-space: nowrap;
}

.flipbook-toolbar__back:hover {
    background: var(--color-surface);
    border-color: rgba(244, 244, 244, 0.22);
}

.flipbook-toolbar__back:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.flipbook-toolbar__title-wrap {
    min-width: 0;
}

.flipbook-toolbar__eyebrow {
    margin: 0;
    font-size: 0.6875rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--color-accent);
}

.flipbook-toolbar__title {
    margin: 0.1rem 0 0;
    font-family: var(--font-display);
    font-size: clamp(0.95rem, 2.5vw, 1.15rem);
    font-weight: 400;
    letter-spacing: 0.01em;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.flipbook-toolbar__actions {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    flex-shrink: 0;
}

.flipbook-icon-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 2.5rem;
    height: 2.5rem;
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--color-text);
    cursor: pointer;
    transition: background 0.2s var(--ease-out), border-color 0.2s var(--ease-out), color 0.2s var(--ease-out);
}

.flipbook-icon-btn:hover {
    background: var(--color-surface);
    border-color: var(--color-border);
}

.flipbook-icon-btn:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.flipbook-icon-btn[aria-pressed="true"] {
    background: var(--color-accent-soft);
    border-color: rgba(212, 168, 83, 0.35);
    color: var(--color-accent);
}

.flipbook-icon-btn svg {
    width: 1.125rem;
    height: 1.125rem;
    fill: currentColor;
}

/* --- Stage --- */
.flipbook-stage {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 0;
    overflow: hidden;
    padding: 1rem 0.5rem;
}

.flipbook-stage__hint {
    position: absolute;
    bottom: 0.75rem;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.35rem 0.75rem;
    border-radius: 999px;
    background: rgba(0, 0, 0, 0.45);
    border: 1px solid var(--color-border);
    color: var(--color-text-muted);
    font-size: 0.75rem;
    letter-spacing: 0.03em;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.4s var(--ease-out);
    z-index: 5;
}

.flipbook-stage__hint.is-visible {
    opacity: 1;
}

#flipbook-mount {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

#flipbook-mount .stf__parent {
    filter: drop-shadow(0 24px 48px var(--color-shadow));
}

#flipbook-mount .stf__block {
    border-radius: 2px;
}

#flipbook-mount .stf__item--hard {
    background: linear-gradient(135deg, #1c1c1c, #0d0d0d);
}

/* --- Dock --- */
.flipbook-dock {
    display: grid;
    grid-template-columns: auto 1fr auto;
    align-items: center;
    gap: 0.75rem;
    padding: 0 1rem;
    border-top: 1px solid var(--color-border);
    background: rgba(8, 8, 8, 0.94);
    backdrop-filter: blur(12px);
    z-index: 30;
}

.flipbook-dock__nav {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.flipbook-dock__center {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.45rem;
    min-width: 0;
}

.flipbook-dock__counter {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    letter-spacing: 0.04em;
    white-space: nowrap;
}

.flipbook-dock__counter strong {
    color: var(--color-text);
    font-weight: 500;
}

.flipbook-dock__slider {
    width: min(100%, 28rem);
    accent-color: var(--color-accent);
    cursor: pointer;
}

.flipbook-dock__jump {
    display: flex;
    align-items: center;
    gap: 0.35rem;
}

.flipbook-dock__jump input {
    width: 3rem;
    padding: 0.35rem 0.4rem;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-text);
    text-align: center;
    font-size: 0.8125rem;
}

.flipbook-dock__jump input:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 1px;
}

.flipbook-dock__jump-label {
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

/* --- Thumbnails drawer --- */
.flipbook-thumbs {
    position: fixed;
    top: var(--toolbar-h);
    right: 0;
    bottom: var(--dock-h);
    width: min(18rem, 92vw);
    background: rgba(12, 12, 12, 0.97);
    border-left: 1px solid var(--color-border);
    transform: translateX(100%);
    transition: transform 0.35s var(--ease-out);
    z-index: 25;
    display: flex;
    flex-direction: column;
}

.flipbook-thumbs.is-open {
    transform: translateX(0);
}

.flipbook-thumbs__head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--color-border);
}

.flipbook-thumbs__head h2 {
    margin: 0;
    font-size: 0.8125rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 500;
}

.flipbook-thumbs__grid {
    flex: 1;
    overflow-y: auto;
    padding: 0.75rem;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 0.5rem;
    align-content: start;
}

.flipbook-thumbs__item {
    appearance: none;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    padding: 0;
    background: var(--color-surface);
    cursor: pointer;
    overflow: hidden;
    transition: border-color 0.2s var(--ease-out), transform 0.2s var(--ease-out);
}

.flipbook-thumbs__item:hover {
    border-color: rgba(244, 244, 244, 0.25);
    transform: translateY(-1px);
}

.flipbook-thumbs__item:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
}

.flipbook-thumbs__item.is-active {
    border-color: var(--color-accent);
}

.flipbook-thumbs__item img {
    display: block;
    width: 100%;
    height: auto;
    aspect-ratio: 3 / 4;
    object-fit: cover;
}

.flipbook-thumbs__num {
    display: block;
    padding: 0.25rem;
    font-size: 0.6875rem;
    color: var(--color-text-muted);
    text-align: center;
}

/* --- Loader --- */
.flipbook-loader {
    position: fixed;
    inset: 0;
    z-index: 100;
    display: grid;
    place-items: center;
    background: var(--color-bg);
    transition: opacity 0.5s var(--ease-out), visibility 0.5s;
}

.flipbook-loader.is-hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.flipbook-loader__card {
    width: min(22rem, 90vw);
    padding: 2rem 1.5rem;
    text-align: center;
}

.flipbook-loader__logo {
    font-family: var(--font-display);
    font-size: 1.35rem;
    letter-spacing: 0.06em;
    margin: 0 0 0.35rem;
}

.flipbook-loader__sub {
    margin: 0 0 1.5rem;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.flipbook-loader__bar {
    height: 3px;
    border-radius: 999px;
    background: var(--color-surface);
    overflow: hidden;
}

.flipbook-loader__bar-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--color-accent), #f0d48a);
    border-radius: inherit;
    transition: width 0.25s var(--ease-out);
}

.flipbook-loader__pct {
    margin: 0.65rem 0 0;
    font-size: 0.75rem;
    color: var(--color-text-muted);
    letter-spacing: 0.06em;
}

/* --- Zoom overlay --- */
.flipbook-zoom {
    position: fixed;
    inset: 0;
    z-index: 90;
    display: grid;
    place-items: center;
    background: rgba(0, 0, 0, 0.92);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s var(--ease-out), visibility 0.3s;
}

.flipbook-zoom.is-open {
    opacity: 1;
    visibility: visible;
}

.flipbook-zoom__close {
    position: absolute;
    top: 1rem;
    right: 1rem;
}

.flipbook-zoom__img {
    max-width: min(96vw, 1200px);
    max-height: 90vh;
    object-fit: contain;
    border-radius: 2px;
    box-shadow: 0 24px 64px rgba(0, 0, 0, 0.6);
}

/* --- Edge tap zones --- */
.flipbook-edge {
    position: absolute;
    top: var(--toolbar-h);
    bottom: var(--dock-h);
    width: clamp(2.5rem, 8vw, 5rem);
    border: none;
    background: transparent;
    cursor: pointer;
    z-index: 10;
    opacity: 0;
    transition: opacity 0.25s var(--ease-out);
}

.flipbook-edge--prev {
    left: 0;
}

.flipbook-edge--next {
    right: 0;
}

.flipbook-app:hover .flipbook-edge,
.flipbook-edge:focus-visible {
    opacity: 1;
}

.flipbook-edge:hover {
    background: linear-gradient(90deg, rgba(212, 168, 83, 0.08), transparent);
}

.flipbook-edge--next:hover {
    background: linear-gradient(270deg, rgba(212, 168, 83, 0.08), transparent);
}

.flipbook-edge:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: -2px;
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .flipbook-toolbar__back span {
        display: none;
    }

    .flipbook-toolbar__eyebrow {
        display: none;
    }

    .flipbook-dock {
        grid-template-columns: 1fr;
        grid-template-rows: auto auto;
        padding: 0.5rem 0.75rem 0.65rem;
        gap: 0.5rem;
    }

    .flipbook-dock__nav {
        justify-content: space-between;
        order: 2;
    }

    .flipbook-dock__center {
        order: 1;
    }

    .flipbook-dock__jump {
        display: none;
    }

    .flipbook-stage__hint {
        display: none;
    }

    .flipbook-thumbs {
        width: 100%;
        border-left: none;
        border-top: 1px solid var(--color-border);
        top: auto;
        height: 42vh;
        bottom: 0;
        transform: translateY(100%);
    }

    .flipbook-thumbs.is-open {
        transform: translateY(0);
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}