/* ============================================
   PPUZZL.party — Styles
   ============================================ */

/* --- Reset & Base --- */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --deep-tide: #1e3a4f;
    --salt-mist: #f4f0e8;
    --driftwood: #3b3832;
    --shore-foam: #6b9bab;
    --kelp-garden: #4a7c72;
    --sunset-nacre: #d4a574;
    --glitch-violet: #7b5ea7;
    --bleached-shell: #e8dcc8;
    --dark-shore: #2d4a5e;
}

html {
    overflow: hidden;
    height: 100vh;
}

body {
    font-family: 'Cormorant Garamond', Georgia, serif;
    background: var(--salt-mist);
    color: var(--driftwood);
    height: 100vh;
    overflow: hidden;
    position: relative;
}

/* Paper grain overlay */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    filter: url(#paper-grain);
    pointer-events: none;
    z-index: 1000;
    background: var(--salt-mist);
    opacity: 0.4;
    mix-blend-mode: multiply;
}

/* --- Progress Bar --- */
#progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 20px;
    z-index: 100;
}

#progress-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 2px;
    width: 0%;
    background: var(--shore-foam);
    transition: width 0.1s linear;
}

#chapter-markers {
    position: relative;
    width: 100%;
    height: 20px;
}

.chapter-marker {
    position: absolute;
    top: 4px;
    transform: translateX(-50%);
    background: none;
    border: none;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
}

.chapter-num {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 300;
    font-size: 0.65rem;
    letter-spacing: 0.08em;
    color: var(--shore-foam);
    transition: transform 0.3s ease, color 0.3s ease;
}

.chapter-label {
    font-family: 'EB Garamond', serif;
    font-style: italic;
    font-size: 0.7rem;
    color: var(--shore-foam);
    opacity: 0;
    transform: translateY(-4px);
    transition: opacity 0.3s ease, transform 0.3s ease;
    white-space: nowrap;
    pointer-events: none;
}

.chapter-marker:hover .chapter-num {
    transform: scale(1.3);
    color: var(--deep-tide);
}

.chapter-marker:hover .chapter-label {
    opacity: 1;
    transform: translateY(0);
}

/* --- Scroll Container --- */
#scroll-container {
    display: flex;
    flex-direction: row;
    height: 100vh;
    overflow-x: auto;
    overflow-y: hidden;
    scroll-behavior: smooth;
    -webkit-overflow-scrolling: touch;
}

#scroll-container::-webkit-scrollbar {
    display: none;
}

#scroll-container {
    -ms-overflow-style: none;
    scrollbar-width: none;
}

/* --- Chapter Base --- */
.chapter {
    flex-shrink: 0;
    height: 100vh;
    position: relative;
    overflow: hidden;
}

/* --- Chapter I: Frontispiece --- */
.chapter-frontispiece {
    width: 100vw;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--salt-mist);
    background-image: radial-gradient(ellipse at 30% 50%, rgba(107, 155, 171, 0.08), transparent 70%);
}

.frontispiece-content {
    position: relative;
    text-align: center;
    z-index: 2;
}

.center-rule {
    position: absolute;
    top: 50%;
    left: -50vw;
    width: 200vw;
    height: 1px;
    background: var(--dark-shore);
    opacity: 0.4;
    z-index: 0;
}

.wordmark {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    font-style: italic;
    font-size: clamp(4rem, 8vw, 12rem);
    letter-spacing: -0.03em;
    color: var(--deep-tide);
    position: relative;
    z-index: 1;
}

.letter {
    display: inline-block;
    transform: translateY(var(--shift, 0));
    opacity: 0;
    animation: letterFadeIn 0.6s ease forwards;
}

.letter:nth-child(1) { animation-delay: 0s; }
.letter:nth-child(2) { animation-delay: 0.15s; }
.letter:nth-child(3) { animation-delay: 0.3s; }
.letter:nth-child(4) { animation-delay: 0.45s; }
.letter:nth-child(5) { animation-delay: 0.6s; }
.letter:nth-child(6) { animation-delay: 0.75s; }

@keyframes letterFadeIn {
    from {
        opacity: 0;
        transform: translateY(calc(var(--shift, 0px) - 8px));
    }
    to {
        opacity: 1;
        transform: translateY(var(--shift, 0px));
    }
}

.letter.glitch-active {
    color: var(--glitch-violet);
    transform: translateY(var(--shift, 0px)) translateX(3px);
    transition: none;
}

.frontispiece-subtitle {
    font-family: 'EB Garamond', serif;
    font-style: italic;
    font-size: 1.1rem;
    color: var(--shore-foam);
    letter-spacing: 0.15em;
    margin-top: 1.5rem;
    text-transform: lowercase;
}

.frontispiece-glitch {
    position: absolute;
    top: 20%;
    left: 0;
    width: 100%;
    height: 60%;
    pointer-events: none;
    z-index: 0;
}

.glitch-band::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        linear-gradient(0deg, transparent 22%, var(--glitch-violet) 22%, var(--glitch-violet) calc(22% + 2px), transparent calc(22% + 2px)),
        linear-gradient(0deg, transparent 47%, var(--shore-foam) 47%, var(--shore-foam) calc(47% + 1px), transparent calc(47% + 1px)),
        linear-gradient(0deg, transparent 68%, var(--sunset-nacre) 68%, var(--sunset-nacre) calc(68% + 3px), transparent calc(68% + 3px)),
        linear-gradient(0deg, transparent 83%, var(--glitch-violet) 83%, var(--glitch-violet) calc(83% + 1px), transparent calc(83% + 1px));
    opacity: 0.3;
    animation: glitch-shift 4s steps(1) infinite;
}

@keyframes glitch-shift {
    0% { background-position-y: 0px; }
    25% { background-position-y: 3px; }
    50% { background-position-y: -2px; }
    75% { background-position-y: 5px; }
    100% { background-position-y: 0px; }
}

.scroll-hint {
    position: absolute;
    right: 3vw;
    top: 50%;
    transform: translateY(-50%);
}

.hint-dot {
    display: block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--shore-foam);
    animation: hintPulse 2s ease-in-out infinite;
}

@keyframes hintPulse {
    0%, 100% { opacity: 0.4; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.4); }
}

/* --- Chapter II: The Thesis --- */
.chapter-thesis {
    width: 200vw;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 5vw;
    background: var(--salt-mist);
    background-image:
        repeating-linear-gradient(0deg, transparent, transparent 2.8rem, rgba(107, 155, 171, 0.04) 2.8rem, rgba(107, 155, 171, 0.04) calc(2.8rem + 1px));
}

.thesis-content {
    max-width: 160vw;
    position: relative;
}

.section-mark {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 300;
    font-size: 1.5rem;
    color: var(--shore-foam);
    display: block;
    margin-bottom: 2rem;
    letter-spacing: 0.08em;
}

.thesis-text {
    font-family: 'Cormorant Garamond', Georgia, serif;
    font-weight: 400;
    font-size: clamp(1.1rem, 1.6vw, 1.5rem);
    line-height: 2.0;
    letter-spacing: 0.01em;
    color: var(--driftwood);
    columns: 2;
    column-gap: 6vw;
    text-align: justify;
    hyphens: auto;
}

.fleuron {
    font-family: 'Cormorant Garamond', serif;
    font-size: 2rem;
    color: var(--sunset-nacre);
    display: block;
    text-align: center;
    margin-top: 3rem;
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1), color 0.6s ease;
    cursor: default;
}

.fleuron:hover {
    transform: rotate(8deg);
    color: var(--glitch-violet);
}

/* --- Chapter III: The Collection --- */
.chapter-collection {
    width: 400vw;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 8vh 8vw;
    background: var(--salt-mist);
    background-image: radial-gradient(ellipse at 50% 60%, rgba(107, 155, 171, 0.06), transparent 60%);
}

.collection-header {
    text-align: center;
    margin-bottom: 4vh;
}

.chapter-title {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    font-style: italic;
    font-size: clamp(2rem, 4vw, 5rem);
    color: var(--deep-tide);
    letter-spacing: -0.03em;
}

.asterism {
    font-family: 'Cormorant Garamond', serif;
    font-size: 1.5rem;
    color: var(--sunset-nacre);
    display: block;
    margin-top: 1rem;
}

.cards-container {
    display: flex;
    align-items: center;
    gap: 8vw;
    padding: 0 4vw;
    flex: 1;
}

.card {
    flex-shrink: 0;
    width: calc(70vh * 0.75);
    height: 70vh;
    background: var(--bleached-shell);
    border: 1px solid rgba(45, 74, 94, 0.12);
    position: relative;
    overflow: hidden;
    transition: transform 0.4s cubic-bezier(0.23, 1, 0.32, 1), opacity 0.4s ease, box-shadow 0.4s ease, filter 0.4s ease;
    transform: scale(0.92);
    opacity: 0.65;
    filter: blur(1px);
}

.card.card-active {
    transform: scale(1);
    opacity: 1;
    filter: blur(0);
}

.card:hover {
    transform: scale(1.03) translateY(-4px);
    box-shadow: 0 12px 40px rgba(30, 58, 79, 0.15);
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.6;
    transition: opacity 0.4s ease;
    animation: glitch-shift 4s steps(1) infinite;
    pointer-events: none;
}

.card:hover::before {
    opacity: 1;
}

.card[data-glitch="1"]::before {
    background:
        repeating-linear-gradient(0deg, transparent, transparent 23%, var(--glitch-violet) 23%, var(--glitch-violet) calc(23% + 2px), transparent calc(23% + 2px)),
        repeating-linear-gradient(0deg, transparent, transparent 61%, var(--shore-foam) 61%, var(--shore-foam) calc(61% + 1px), transparent calc(61% + 1px));
}

.card[data-glitch="2"]::before {
    background:
        repeating-linear-gradient(0deg, transparent, transparent 47%, var(--shore-foam) 47%, var(--shore-foam) calc(47% + 3px), transparent calc(47% + 3px)),
        repeating-linear-gradient(0deg, transparent, transparent 78%, var(--sunset-nacre) 78%, var(--sunset-nacre) calc(78% + 1px), transparent calc(78% + 1px));
    animation-delay: -1s;
}

.card[data-glitch="3"]::before {
    background:
        repeating-linear-gradient(0deg, transparent, transparent 15%, var(--sunset-nacre) 15%, var(--sunset-nacre) calc(15% + 2px), transparent calc(15% + 2px)),
        repeating-linear-gradient(0deg, transparent, transparent 55%, var(--glitch-violet) 55%, var(--glitch-violet) calc(55% + 1px), transparent calc(55% + 1px)),
        repeating-linear-gradient(0deg, transparent, transparent 82%, var(--shore-foam) 82%, var(--shore-foam) calc(82% + 2px), transparent calc(82% + 2px));
    animation-delay: -2s;
}

.card[data-glitch="4"]::before {
    background:
        repeating-linear-gradient(0deg, transparent, transparent 33%, var(--shore-foam) 33%, var(--shore-foam) calc(33% + 2px), transparent calc(33% + 2px)),
        repeating-linear-gradient(0deg, transparent, transparent 71%, var(--glitch-violet) 71%, var(--glitch-violet) calc(71% + 1px), transparent calc(71% + 1px));
    animation-delay: -0.5s;
}

.card[data-glitch="5"]::before {
    background:
        repeating-linear-gradient(0deg, transparent, transparent 12%, var(--glitch-violet) 12%, var(--glitch-violet) calc(12% + 1px), transparent calc(12% + 1px)),
        repeating-linear-gradient(0deg, transparent, transparent 44%, var(--sunset-nacre) 44%, var(--sunset-nacre) calc(44% + 3px), transparent calc(44% + 3px)),
        repeating-linear-gradient(0deg, transparent, transparent 88%, var(--shore-foam) 88%, var(--shore-foam) calc(88% + 1px), transparent calc(88% + 1px));
    animation-delay: -3s;
}

.card[data-glitch="6"]::before {
    background:
        repeating-linear-gradient(0deg, transparent, transparent 29%, var(--sunset-nacre) 29%, var(--sunset-nacre) calc(29% + 2px), transparent calc(29% + 2px)),
        repeating-linear-gradient(0deg, transparent, transparent 63%, var(--glitch-violet) 63%, var(--glitch-violet) calc(63% + 2px), transparent calc(63% + 2px));
    animation-delay: -1.5s;
}

.card-inner {
    position: relative;
    z-index: 1;
    padding: 3rem 2.5rem;
    display: flex;
    flex-direction: column;
    height: 100%;
    justify-content: flex-end;
}

.card-id {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 300;
    font-size: 0.8rem;
    letter-spacing: 0.08em;
    color: var(--shore-foam);
    position: absolute;
    top: 2.5rem;
    left: 2.5rem;
}

.card-title {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    font-style: italic;
    font-size: 1.6rem;
    color: var(--deep-tide);
    letter-spacing: -0.02em;
    margin-bottom: 1rem;
    line-height: 1.3;
}

.card-desc {
    font-family: 'EB Garamond', serif;
    font-style: italic;
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--driftwood);
}

.card-fleuron {
    font-family: 'Cormorant Garamond', serif;
    font-size: 1.5rem;
    color: var(--sunset-nacre);
    margin-top: 1.5rem;
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1), color 0.6s ease;
}

.card:hover .card-fleuron {
    transform: rotate(8deg);
    color: var(--glitch-violet);
}

/* --- Chapter IV: The Marginalia --- */
.chapter-marginalia {
    width: 200vw;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding: 5vw;
    background: var(--salt-mist);
}

.marginalia-ampersand {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    font-style: italic;
    font-size: 60vw;
    color: var(--bleached-shell);
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
    line-height: 1;
    pointer-events: none;
    z-index: 0;
}

.marginalia-notes {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: 6vh;
    max-width: 120vw;
    padding: 0 10vw;
}

.note {
    display: flex;
    align-items: flex-start;
    gap: 1.5rem;
    transform: translateX(var(--note-offset, 0));
}

.note-1 { --note-offset: 4vw; }
.note-2 { --note-offset: -2vw; align-self: flex-end; }
.note-3 { --note-offset: 8vw; }
.note-4 { --note-offset: 1vw; align-self: flex-end; }

.pilcrow {
    font-family: 'IBM Plex Mono', monospace;
    font-weight: 300;
    font-size: 1.2rem;
    color: var(--shore-foam);
    flex-shrink: 0;
    cursor: default;
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1), color 0.6s ease;
}

.pilcrow:hover {
    transform: rotate(8deg);
    color: var(--glitch-violet);
}

.note-text {
    font-family: 'EB Garamond', serif;
    font-style: italic;
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--driftwood);
    max-width: 40rem;
}

.marginalia-ornaments {
    position: absolute;
    z-index: 1;
    right: 10vw;
    top: 50%;
    transform: translateY(-50%);
    display: flex;
    flex-direction: column;
    gap: 4rem;
}

.ornament {
    font-family: 'Cormorant Garamond', serif;
    font-size: 2rem;
    color: var(--sunset-nacre);
    transition: transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1), color 0.6s ease;
    cursor: default;
}

.ornament-1 { transform: rotate(2deg); }
.ornament-2 { transform: rotate(-3deg) translateX(8px); }
.ornament-3 { transform: rotate(1deg); }

.ornament:hover {
    transform: rotate(8deg);
    color: var(--glitch-violet);
}

/* --- Chapter V: The Colophon --- */
.chapter-colophon {
    width: 100vw;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--salt-mist);
    position: relative;
}

.colophon-content {
    text-align: center;
    position: relative;
    z-index: 1;
}

.colophon-glitch-band {
    position: absolute;
    top: 0;
    left: -50vw;
    width: 200vw;
    height: 100vh;
    pointer-events: none;
    z-index: 0;
}

.colophon-glitch-band::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 3px;
    background: linear-gradient(90deg, transparent 20%, var(--glitch-violet) 20%, var(--glitch-violet) 45%, transparent 45%, transparent 55%, var(--shore-foam) 55%, var(--shore-foam) 80%, transparent 80%);
    opacity: 0.5;
    animation: colophonGlitch 12s steps(1) infinite;
}

@keyframes colophonGlitch {
    0% { top: 20%; }
    8% { top: 20%; }
    8.3% { top: 55%; }
    16% { top: 55%; }
    16.3% { top: 38%; }
    24% { top: 38%; }
    24.3% { top: 72%; }
    32% { top: 72%; }
    32.3% { top: 15%; }
    50% { top: 15%; }
    50.3% { top: 83%; }
    66% { top: 83%; }
    66.3% { top: 45%; }
    83% { top: 45%; }
    83.3% { top: 20%; }
    100% { top: 20%; }
}

.small-caps {
    font-family: 'Cormorant Garamond', serif;
    font-variant: small-caps;
    font-size: 1rem;
    letter-spacing: 0.15em;
    line-height: 2;
    color: var(--driftwood);
}

.colophon-date {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    font-style: italic;
    font-size: 2rem;
    color: var(--deep-tide);
    letter-spacing: 0.1em;
}

.colophon-note {
    font-family: 'EB Garamond', serif;
    font-style: italic;
    font-size: 0.85rem;
    color: var(--shore-foam);
    line-height: 1.7;
}

.colophon-mark {
    font-family: 'Cormorant Garamond', serif;
    font-size: 2rem;
    color: var(--sunset-nacre);
}

.colophon-final {
    font-family: 'EB Garamond', serif;
    font-style: italic;
    font-size: 0.95rem;
    color: var(--driftwood);
    opacity: 0.6;
}

.colophon-text {
    line-height: 1.8;
}

/* --- Coastal Wave --- */
#coastal-wave {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 40px;
    pointer-events: none;
    z-index: 50;
    overflow: hidden;
}

#coastal-wave::before,
#coastal-wave::after {
    content: '';
    position: absolute;
    bottom: -20px;
    width: 200%;
    height: 40px;
    border-radius: 50%;
    background: rgba(107, 155, 171, 0.06);
}

#coastal-wave::before {
    left: -50%;
    animation: wave 20s ease-in-out infinite;
}

#coastal-wave::after {
    left: -30%;
    animation: wave 20s ease-in-out infinite reverse;
    animation-delay: -5s;
}

@keyframes wave {
    0%, 100% { transform: translateX(0) translateY(0); }
    25% { transform: translateX(2%) translateY(-3px); }
    50% { transform: translateX(-1%) translateY(-6px); }
    75% { transform: translateX(3%) translateY(-2px); }
}

/* --- Full-width decorative rule --- */
.chapter-thesis::before {
    content: '\2014';
    position: absolute;
    top: 50%;
    left: 0;
    width: 100%;
    font-size: 0;
    height: 0.5px;
    background: var(--shore-foam);
    opacity: 0.3;
}