/* ============================================================
   RRIDDL.com - Styles
   Palette: Obsidian Deep, Mahogany Shadow, Amber Lantern,
            Verdigris Clue, Dusty Rose Hint, Parchment,
            Faded Ink, Tarnished Brass
   Fonts: Playfair Display, Crimson Pro, Cutive Mono
   ============================================================ */

/* --- CSS Custom Properties --- */
:root {
    --obsidian-deep: #0f0e17;
    --mahogany-shadow: #2b1d0e;
    --amber-lantern: #e8a631;
    --verdigris-clue: #4a9e8e;
    --dusty-rose: #b8606b;
    --parchment: #ede6d6;
    --faded-ink: #8a7f6e;
    --tarnished-brass: #6b5b3e;

    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'Crimson Pro', 'Times New Roman', serif;
    --font-mono: 'Cutive Mono', 'Courier New', monospace;

    --mouse-x: 50%;
    --mouse-y: 50%;
    --grid-gap: clamp(24px, 4vw, 64px);
}

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

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    background-color: var(--obsidian-deep);
    color: var(--parchment);
    font-family: var(--font-body);
    font-size: 18px;
    line-height: 1.75;
    overflow-x: hidden;
    position: relative;
}

/* --- Noise Grain Overlay --- */
.noise-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9998;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='1'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 256px 256px;
}

/* --- Keyhole Vignette --- */
.vignette {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9997;
    background: radial-gradient(
        ellipse at center,
        transparent 40%,
        rgba(15, 14, 23, 0.3) 70%,
        rgba(15, 14, 23, 0.7) 100%
    );
}

/* --- Cipher Wheel --- */
.cipher-wheel {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: min(90vw, 90vh);
    height: min(90vw, 90vh);
    pointer-events: none;
    z-index: 1;
    opacity: 0;
    transition: opacity 2s ease;
}

.cipher-wheel.visible {
    opacity: 0.2;
}

.cipher-outer-ring {
    animation: rotate-clockwise 120s linear infinite;
    transform-origin: 400px 400px;
}

.cipher-inner-ring {
    animation: rotate-counter 90s linear infinite;
    transform-origin: 400px 400px;
}

@keyframes rotate-clockwise {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

@keyframes rotate-counter {
    from { transform: rotate(0deg); }
    to { transform: rotate(-360deg); }
}

/* --- Corner Navigation --- */
.corner-nav {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
}

.corner-glyph {
    position: fixed;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--amber-lantern);
    text-decoration: none;
    pointer-events: auto;
    opacity: 0.6;
    transition: opacity 0.4s ease, transform 0.4s ease, text-shadow 0.4s ease;
    filter: grayscale(1) brightness(1.5);
}

.corner-glyph:hover {
    opacity: 1;
    transform: scale(1.15);
    text-shadow: 0 0 12px var(--amber-lantern);
}

.corner-glyph--tl {
    top: 20px;
    left: 20px;
}

.corner-glyph--tr {
    top: 20px;
    right: 20px;
}

.corner-glyph--bl {
    bottom: 20px;
    left: 20px;
}

.corner-glyph--br {
    bottom: 20px;
    right: 20px;
}

.corner-glyph.pulse {
    animation: glyph-pulse 1s ease-out;
}

@keyframes glyph-pulse {
    0% { transform: scale(1); text-shadow: 0 0 0 transparent; }
    50% { transform: scale(1.2); text-shadow: 0 0 20px var(--amber-lantern); }
    100% { transform: scale(1); text-shadow: 0 0 0 transparent; }
}

/* --- Question Mark Constellation --- */
.question-constellation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 2;
    overflow: hidden;
}

.question-constellation__mark {
    position: absolute;
    font-family: var(--font-display);
    color: var(--faded-ink);
    opacity: 0;
    animation: drift-question 45s ease-in-out infinite;
}

@keyframes drift-question {
    0%, 100% {
        transform: translate(0, 0) rotate(0deg);
        opacity: 0.08;
    }
    25% {
        transform: translate(15px, -20px) rotate(5deg);
        opacity: 0.18;
    }
    50% {
        transform: translate(-10px, 10px) rotate(-3deg);
        opacity: 0.08;
    }
    75% {
        transform: translate(20px, 15px) rotate(8deg);
        opacity: 0.22;
    }
}

/* ============================================================
   SECTION 1: The Locked Door
   ============================================================ */
.section--locked-door {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    z-index: 10;
}

.locked-door__content {
    text-align: center;
}

.wordmark {
    font-family: var(--font-display);
    font-size: clamp(4rem, 10vw, 8rem);
    font-weight: 900;
    letter-spacing: 0.15em;
    color: var(--amber-lantern);
    display: flex;
    justify-content: center;
    gap: 0.05em;
    position: relative;
}

.wordmark__letter {
    display: inline-block;
    transition: transform 1.5s cubic-bezier(0.23, 1, 0.32, 1),
                opacity 1s ease;
    will-change: transform;
}

.wordmark.scrambled .wordmark__letter:nth-child(1) {
    transform: translateX(80px) translateY(-30px) rotate(15deg);
    opacity: 0.5;
}
.wordmark.scrambled .wordmark__letter:nth-child(2) {
    transform: translateX(-60px) translateY(40px) rotate(-20deg);
    opacity: 0.5;
}
.wordmark.scrambled .wordmark__letter:nth-child(3) {
    transform: translateX(120px) translateY(20px) rotate(10deg);
    opacity: 0.5;
}
.wordmark.scrambled .wordmark__letter:nth-child(4) {
    transform: translateX(-90px) translateY(-50px) rotate(-15deg);
    opacity: 0.5;
}
.wordmark.scrambled .wordmark__letter:nth-child(5) {
    transform: translateX(50px) translateY(60px) rotate(25deg);
    opacity: 0.5;
}
.wordmark.scrambled .wordmark__letter:nth-child(6) {
    transform: translateX(-40px) translateY(-20px) rotate(-30deg);
    opacity: 0.5;
}

.wordmark.resolved .wordmark__letter {
    transform: translateX(0) translateY(0) rotate(0deg);
    opacity: 1;
}

/* Rotating cipher text */
.rotating-cipher {
    margin-top: 2rem;
    height: 2em;
    position: relative;
    overflow: hidden;
}

.rotating-cipher__text {
    position: absolute;
    width: 100%;
    left: 0;
    top: 0;
    font-family: var(--font-mono);
    font-size: 14px;
    letter-spacing: 0.08em;
    color: var(--amber-lantern);
    opacity: 0;
    transition: opacity 1s ease, transform 1s ease;
    transform: translateY(10px);
}

.rotating-cipher__text.active {
    opacity: 1;
    transform: translateY(0);
}

/* Scroll indicator */
.scroll-indicator {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    opacity: 0.5;
    animation: bob 2s ease-in-out infinite;
}

.scroll-indicator__text {
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: 0.1em;
    color: var(--faded-ink);
    text-transform: uppercase;
}

.scroll-indicator__arrow {
    color: var(--faded-ink);
}

@keyframes bob {
    0%, 100% { transform: translateX(-50%) translateY(0); }
    50% { transform: translateX(-50%) translateY(8px); }
}

/* ============================================================
   SECTION 2: The First Chamber
   ============================================================ */
.section--first-chamber {
    min-height: 150vh;
    padding: clamp(40px, 8vw, 120px) clamp(20px, 4vw, 80px);
    position: relative;
    z-index: 10;
}

.bento-grid--chamber {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: auto;
    gap: var(--grid-gap);
    max-width: 1200px;
    margin: 0 auto;
}

.compartment {
    background: var(--mahogany-shadow);
    border: 1px solid var(--tarnished-brass);
    border-radius: 4px;
    padding: clamp(20px, 3vw, 40px);
    box-shadow:
        inset 2px 2px 8px rgba(0, 0, 0, 0.4),
        calc((var(--mouse-x) - 50) * 0.05px) calc((var(--mouse-y) - 50) * 0.05px) 20px rgba(0, 0, 0, 0.3);
    transition: box-shadow 0.6s ease, transform 0.4s ease;
    position: relative;
    cursor: default;
}

/* Reveal on approach */
.compartment[data-reveal="true"] {
    opacity: 0;
    filter: blur(8px);
    transform: translateY(20px);
    transition: opacity 0.6s ease, filter 0.6s ease, transform 0.6s ease,
                box-shadow 0.6s ease;
}

.compartment[data-reveal="true"].revealed {
    opacity: 1;
    filter: blur(0px);
    transform: translateY(0);
}

.compartment:hover {
    box-shadow:
        inset 1px 1px 4px rgba(0, 0, 0, 0.2),
        0 -2px 12px rgba(232, 166, 49, 0.15),
        0 4px 20px rgba(0, 0, 0, 0.4);
}

.compartment:hover .compartment__answer {
    opacity: 1;
    transform: translateY(0);
}

.compartment--large {
    grid-column: span 2;
    grid-row: span 1;
}

.compartment--tall {
    grid-column: span 1;
    grid-row: span 2;
    display: flex;
    align-items: center;
}

.compartment--wide {
    grid-column: span 2;
    grid-row: span 1;
}

.compartment--medium {
    grid-column: span 2;
    grid-row: span 1;
}

.compartment--small {
    grid-column: span 1;
    grid-row: span 1;
}

.compartment__question {
    font-family: var(--font-display);
    font-size: clamp(1.2rem, 2.5vw, 1.8rem);
    font-weight: 700;
    color: var(--parchment);
    margin-bottom: 1rem;
    line-height: 1.4;
}

.compartment__answer {
    font-family: var(--font-mono);
    font-size: 14px;
    letter-spacing: 0.08em;
    color: var(--amber-lantern);
    opacity: 0;
    transform: translateY(8px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

/* Path Connectors */
.path-connectors {
    position: absolute;
    width: 100%;
    height: 200px;
    left: 0;
    z-index: 5;
    pointer-events: none;
}

.connector-line {
    stroke-dasharray: 200;
    stroke-dashoffset: 200;
    transition: stroke-dashoffset 2s ease;
}

.connector-line.drawn {
    stroke-dashoffset: 0;
}

/* ============================================================
   SECTION 3: The Hidden Passage
   ============================================================ */
.section--hidden-passage {
    min-height: 100vh;
    padding: clamp(40px, 8vw, 120px) 0;
    position: relative;
    z-index: 10;
    background: linear-gradient(
        135deg,
        var(--obsidian-deep) 0%,
        var(--mahogany-shadow) 50%,
        var(--obsidian-deep) 100%
    );
}

.passage-title {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    color: var(--amber-lantern);
    text-align: center;
    margin-bottom: clamp(30px, 5vw, 60px);
    letter-spacing: 0.1em;
}

.horizontal-scroll {
    overflow-x: auto;
    overflow-y: hidden;
    scroll-snap-type: x mandatory;
    -webkit-overflow-scrolling: touch;
    padding: 20px clamp(20px, 4vw, 80px);
    scrollbar-width: thin;
    scrollbar-color: var(--tarnished-brass) var(--obsidian-deep);
}

.horizontal-scroll::-webkit-scrollbar {
    height: 6px;
}

.horizontal-scroll::-webkit-scrollbar-track {
    background: var(--obsidian-deep);
}

.horizontal-scroll::-webkit-scrollbar-thumb {
    background: var(--tarnished-brass);
    border-radius: 3px;
}

.scroll-track {
    display: flex;
    gap: clamp(20px, 3vw, 40px);
    width: max-content;
    padding: 20px 0;
}

/* Flip Cards */
.flip-card {
    width: clamp(280px, 30vw, 380px);
    height: clamp(350px, 40vh, 480px);
    perspective: 1000px;
    scroll-snap-align: center;
    flex-shrink: 0;
    cursor: pointer;
}

.flip-card__inner {
    position: relative;
    width: 100%;
    height: 100%;
    transition: transform 0.8s cubic-bezier(0.23, 1, 0.32, 1);
    transform-style: preserve-3d;
}

.flip-card.flipped .flip-card__inner {
    transform: rotateY(180deg);
}

.flip-card__front,
.flip-card__back {
    position: absolute;
    width: 100%;
    height: 100%;
    backface-visibility: hidden;
    -webkit-backface-visibility: hidden;
    border-radius: 4px;
    border: 1px solid var(--tarnished-brass);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: clamp(24px, 3vw, 40px);
    box-shadow: inset 2px 2px 8px rgba(0, 0, 0, 0.4);
}

.flip-card__front {
    background: var(--mahogany-shadow);
}

.flip-card__back {
    background: linear-gradient(145deg, var(--mahogany-shadow), #1a1208);
    transform: rotateY(180deg);
}

.flip-card__riddle {
    font-family: var(--font-display);
    font-size: clamp(1rem, 2vw, 1.4rem);
    color: var(--parchment);
    text-align: center;
    line-height: 1.6;
}

.flip-card__solution {
    font-family: var(--font-mono);
    font-size: clamp(1.2rem, 2.5vw, 2rem);
    color: var(--amber-lantern);
    text-align: center;
    letter-spacing: 0.08em;
}

/* ============================================================
   SECTION 4: The Inner Sanctum
   ============================================================ */
.section--inner-sanctum {
    min-height: 150vh;
    padding: clamp(40px, 8vw, 120px) clamp(20px, 4vw, 80px);
    position: relative;
    z-index: 10;
}

.bento-grid--sanctum {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: clamp(16px, 2.5vw, 32px);
    max-width: 1200px;
    margin: 0 auto;
}

.compartment--sanctum {
    cursor: pointer;
}

.compartment--sanctum .compartment__heading {
    font-family: var(--font-display);
    font-size: clamp(1rem, 2vw, 1.5rem);
    font-weight: 700;
    color: var(--amber-lantern);
    margin-bottom: 0.75rem;
}

.compartment--sanctum .compartment__preview {
    font-family: var(--font-body);
    font-size: 16px;
    color: var(--faded-ink);
    font-style: italic;
}

.compartment__expanded {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.6s cubic-bezier(0.23, 1, 0.32, 1),
                padding 0.6s cubic-bezier(0.23, 1, 0.32, 1);
}

.compartment--sanctum.expanded .compartment__expanded {
    max-height: 400px;
    padding-top: 1rem;
}

.compartment__expanded p {
    font-family: var(--font-body);
    font-size: 16px;
    color: var(--parchment);
    line-height: 1.75;
}

.compartment--sanctum.expanded .compartment__preview {
    display: none;
}

.compartment--sanctum.expanded {
    border-color: var(--amber-lantern);
    box-shadow:
        inset 1px 1px 4px rgba(0, 0, 0, 0.2),
        0 0 20px rgba(232, 166, 49, 0.1);
}

/* ============================================================
   SECTION 5: The Answer
   ============================================================ */
.section--answer {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    position: relative;
    z-index: 10;
    background: var(--obsidian-deep);
}

.answer__content {
    text-align: center;
}

.answer__symbol {
    position: relative;
    width: clamp(200px, 40vw, 400px);
    height: clamp(100px, 20vw, 200px);
    margin: 0 auto 3rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.answer__question-mark {
    font-family: var(--font-display);
    font-size: clamp(8rem, 20vw, 16rem);
    color: var(--amber-lantern);
    position: absolute;
    transition: opacity 3s ease, transform 3s ease;
    line-height: 1;
}

.answer__wordmark-final {
    font-family: var(--font-display);
    font-size: clamp(4rem, 10vw, 8rem);
    font-weight: 900;
    letter-spacing: 0.15em;
    color: var(--amber-lantern);
    position: absolute;
    opacity: 0;
    transform: scale(0.8);
    transition: opacity 3s ease, transform 3s ease;
}

.answer__symbol.morphed .answer__question-mark {
    opacity: 0;
    transform: scale(1.5) rotate(15deg);
}

.answer__symbol.morphed .answer__wordmark-final {
    opacity: 1;
    transform: scale(1);
}

.answer__typewriter {
    font-family: var(--font-mono);
    font-size: 14px;
    letter-spacing: 0.08em;
    color: var(--amber-lantern);
    min-height: 2em;
}

.typewriter__cursor {
    animation: blink-cursor 0.8s step-end infinite;
    color: var(--amber-lantern);
}

@keyframes blink-cursor {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 900px) {
    .bento-grid--chamber {
        grid-template-columns: 1fr 1fr;
    }

    .compartment--large,
    .compartment--wide,
    .compartment--medium {
        grid-column: span 2;
    }

    .compartment--tall {
        grid-column: span 1;
        grid-row: span 1;
    }

    .bento-grid--sanctum {
        grid-template-columns: 1fr 1fr;
    }
}

@media (max-width: 600px) {
    .bento-grid--chamber,
    .bento-grid--sanctum {
        grid-template-columns: 1fr;
    }

    .compartment--large,
    .compartment--wide,
    .compartment--medium,
    .compartment--tall {
        grid-column: span 1;
        grid-row: span 1;
    }

    .corner-glyph {
        width: 36px;
        height: 36px;
        font-size: 16px;
    }

    .corner-glyph--tl { top: 10px; left: 10px; }
    .corner-glyph--tr { top: 10px; right: 10px; }
    .corner-glyph--bl { bottom: 10px; left: 10px; }
    .corner-glyph--br { bottom: 10px; right: 10px; }
}

/* ============================================================
   Reduced Motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
    .cipher-outer-ring,
    .cipher-inner-ring {
        animation: none;
    }

    .wordmark__letter {
        transition: none;
    }

    .compartment[data-reveal="true"] {
        opacity: 1;
        filter: none;
        transform: none;
        transition: box-shadow 0.6s ease;
    }

    .flip-card__inner {
        transition: none;
    }

    .question-constellation__mark {
        animation: none;
        opacity: 0.1;
    }

    .scroll-indicator {
        animation: none;
    }

    .rotating-cipher__text {
        transition: none;
    }

    .answer__question-mark,
    .answer__wordmark-final {
        transition: none;
    }

    .compartment__expanded {
        transition: none;
    }

    .connector-line {
        transition: none;
    }
}