/* =========================================
   senggack.com - Styles
   A journey through the topology of cognition
   ========================================= */

/* --- Custom Properties (Brain-Structure Palette) --- */
:root {
    --cerebral-midnight: #0D0F1A;
    --thought-fog: #1A1D2E;
    --cortex-white: #E8E4DF;
    --synapse-silver: #B8C4D0;
    --dendrite-gold: #C9A84C;
    --amygdala-rose: #8B3A62;
    --hippocampus-teal: #2D6B6B;
    --prefrontal-amber: #D4923A;
    --deepening-bg: #12101E;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
    overflow-x: hidden;
}

body {
    background-color: var(--cerebral-midnight);
    color: var(--cortex-white);
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 300;
    line-height: 1.75;
    letter-spacing: 0.01em;
    overflow-x: hidden;
}

/* --- Thought Thread Navigation --- */
#thought-thread {
    position: fixed;
    top: 0;
    right: 1.5vw;
    width: 60px;
    height: 100vh;
    z-index: 100;
    pointer-events: none;
}

#thread-svg {
    width: 100%;
    height: 100%;
}

#thread-path {
    stroke: var(--dendrite-gold);
    stroke-width: 1.5;
    stroke-linecap: round;
    transition: stroke-dashoffset 0.3s ease;
}

.thread-node {
    fill: var(--dendrite-gold);
    cursor: pointer;
    pointer-events: all;
    transition: r 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.thread-node:hover {
    r: 6;
}

.thread-node.active {
    animation: nodePulse 3s ease-in-out infinite;
}

@keyframes nodePulse {
    0%, 100% {
        filter: drop-shadow(0 0 2px rgba(201, 168, 76, 0.3));
        r: 4;
    }
    50% {
        filter: drop-shadow(0 0 8px rgba(201, 168, 76, 0.7));
        r: 5.5;
    }
}

/* Thread branch lines */
.thread-branch {
    stroke: var(--synapse-silver);
    stroke-width: 0.5;
    opacity: 0.2;
    fill: none;
}

.thread-branch-end {
    fill: var(--dendrite-gold);
    opacity: 0.3;
}

/* --- Chamber Base --- */
.chamber {
    position: relative;
    width: 100vw;
    min-height: 100vh;
    overflow: hidden;
}

.chamber-1 { background-color: var(--cerebral-midnight); }
.chamber-2 { background-color: var(--cerebral-midnight); }
.chamber-3 { background-color: var(--deepening-bg); }
.chamber-4 { background-color: var(--cerebral-midnight); }
.chamber-5 {
    background-color: var(--cerebral-midnight);
    scroll-snap-align: end;
    scroll-snap-stop: always;
}

/* --- Chamber Frame --- */
.chamber-frame {
    position: absolute;
    inset: 3vw;
    pointer-events: none;
}

.chamber-frame > * {
    pointer-events: auto;
}

.chamber-frame::before {
    content: '';
    position: absolute;
    inset: 0;
    pointer-events: none;
}

.frame-complete::before {
    border: 1px solid transparent;
    border-image: linear-gradient(
        135deg,
        rgba(184, 196, 208, 0.15) 0%,
        rgba(184, 196, 208, 0.4) 20%,
        rgba(184, 196, 208, 0.4) 80%,
        rgba(184, 196, 208, 0.15) 100%
    ) 1;
}

.frame-open-bottom::before {
    border-top: 1px solid rgba(184, 196, 208, 0.35);
    border-left: 1px solid rgba(184, 196, 208, 0.35);
    border-right: 1px solid rgba(184, 196, 208, 0.35);
    border-bottom: none;
}

.frame-open-top::before {
    border-bottom: 1px solid rgba(184, 196, 208, 0.35);
    border-left: 1px solid rgba(184, 196, 208, 0.35);
    border-right: 1px solid rgba(184, 196, 208, 0.35);
    border-top: none;
}

/* --- Chamber Content Positioning --- */
.chamber-content {
    position: relative;
    width: 100%;
    height: 100%;
    min-height: calc(100vh - 6vw);
}

/* --- Hero (Chamber 1) --- */
.hero-title {
    position: absolute;
    top: 38%;
    left: 50%;
    transform: translateX(-50%);
    font-family: 'Playfair Display', serif;
    font-size: clamp(2.8rem, 7vw, 7.5rem);
    font-weight: 400;
    letter-spacing: 0.06em;
    line-height: 1.15;
    color: var(--cortex-white);
    white-space: nowrap;
}

.hero-letter {
    display: inline-block;
    opacity: 0;
    animation: letterFadeIn 200ms ease forwards;
    animation-delay: calc(var(--delay) * 150ms + 300ms);
}

@keyframes letterFadeIn {
    from {
        opacity: 0;
        transform: translateY(12px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-subtitle {
    position: absolute;
    top: calc(38% + clamp(3.5rem, 8vw, 8.5rem));
    left: 50%;
    transform: translateX(-50%);
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 300;
    font-size: 1.5rem;
    color: var(--synapse-silver);
    letter-spacing: 0.04em;
    opacity: 0;
    animation: subtitleFadeIn 800ms ease 1.8s forwards;
}

@keyframes subtitleFadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* --- Chamber Titles --- */
.chamber-title {
    position: absolute;
    font-family: 'Playfair Display', serif;
    font-size: clamp(1.4rem, 3vw, 2.8rem);
    font-weight: 700;
    letter-spacing: 0.06em;
    line-height: 1.15;
    color: var(--cortex-white);
}

/* --- Chamber Body Text --- */
.chamber-body {
    position: absolute;
    max-width: 38ch;
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 300;
    font-size: clamp(0.95rem, 1.2vw, 1.15rem);
    line-height: 1.75;
    letter-spacing: 0.01em;
    color: var(--cortex-white);
}

.chamber-body p {
    margin-bottom: 1.2em;
}

.chamber-body-deep {
    font-size: 0.9rem;
    max-width: 34ch;
}

/* --- Pull Quote --- */
.pull-quote {
    position: absolute;
    max-width: 24ch;
    border-left: 3px solid var(--amygdala-rose);
    padding-left: 1.2em;
}

.pq-text {
    font-family: 'Playfair Display', serif;
    font-style: italic;
    font-size: 2.5rem;
    line-height: 1.3;
    color: var(--cortex-white);
    letter-spacing: 0.02em;
}

/* --- Floating Text Fragments --- */
.floating-text {
    position: absolute;
    font-family: 'Playfair Display', serif;
    font-style: italic;
    color: var(--cortex-white);
    pointer-events: none;
    white-space: nowrap;
    will-change: transform;
    animation: floatDrift var(--drift-duration, 180s) ease-in-out infinite alternate;
}

@keyframes floatDrift {
    0% {
        transform: translate3d(0, 0, 0);
    }
    25% {
        transform: translate3d(
            calc(var(--drift-x, 15px)),
            calc(var(--drift-y, -10px)),
            0
        );
    }
    50% {
        transform: translate3d(
            calc(var(--drift-x, 15px) * -0.5),
            calc(var(--drift-y, -10px) * 1.5),
            0
        );
    }
    75% {
        transform: translate3d(
            calc(var(--drift-x, 15px) * 0.8),
            calc(var(--drift-y, -10px) * -0.3),
            0
        );
    }
    100% {
        transform: translate3d(
            calc(var(--drift-x, 15px) * -1),
            calc(var(--drift-y, -10px) * -1),
            0
        );
    }
}

/* Individual drift variations */
.ft-1 { --drift-duration: 240s; --drift-x: 20px; --drift-y: -12px; }
.ft-2 { --drift-duration: 200s; --drift-x: -15px; --drift-y: 18px; }
.ft-3 { --drift-duration: 260s; --drift-x: 12px; --drift-y: -20px; }
.ft-4 { --drift-duration: 180s; --drift-x: -18px; --drift-y: 14px; }
.ft-5 { --drift-duration: 220s; --drift-x: 25px; --drift-y: -8px; }
.ft-6 { --drift-duration: 300s; --drift-x: -10px; --drift-y: 22px; }
.ft-7 { --drift-duration: 190s; --drift-x: 16px; --drift-y: -16px; }
.ft-8 { --drift-duration: 250s; --drift-x: -22px; --drift-y: 10px; }
.ft-9 { --drift-duration: 210s; --drift-x: 14px; --drift-y: 20px; }
.ft-10 { --drift-duration: 270s; --drift-x: -12px; --drift-y: -18px; }
.ft-11 { --drift-duration: 160s; --drift-x: 18px; --drift-y: -14px; }
.ft-12 { --drift-duration: 230s; --drift-x: -20px; --drift-y: 16px; }
.ft-13 { --drift-duration: 280s; --drift-x: 10px; --drift-y: -22px; }
.ft-14 { --drift-duration: 140s; --drift-x: -8px; --drift-y: 25px; }
.ft-15 { --drift-duration: 200s; --drift-x: 22px; --drift-y: -10px; }
.ft-16 { --drift-duration: 260s; --drift-x: -16px; --drift-y: 12px; }
.ft-17 { --drift-duration: 170s; --drift-x: 14px; --drift-y: -20px; }
.ft-18 { --drift-duration: 240s; --drift-x: -25px; --drift-y: 8px; }
.ft-19 { --drift-duration: 290s; --drift-x: 20px; --drift-y: 14px; }
.ft-20 { --drift-duration: 150s; --drift-x: -14px; --drift-y: -16px; }
.ft-21 { --drift-duration: 210s; --drift-x: 12px; --drift-y: 18px; }
.ft-22 { --drift-duration: 250s; --drift-x: -18px; --drift-y: -12px; }
.ft-23 { --drift-duration: 180s; --drift-x: 16px; --drift-y: 22px; }
.ft-24 { --drift-duration: 270s; --drift-x: -10px; --drift-y: -20px; }
.ft-25 { --drift-duration: 300s; --drift-x: 8px; --drift-y: 14px; }
.ft-26 { --drift-duration: 220s; --drift-x: -14px; --drift-y: -10px; }
.ft-27 { --drift-duration: 260s; --drift-x: 18px; --drift-y: 12px; }

/* --- De Chirico Shadows --- */
.dechirico-shadow {
    position: absolute;
    pointer-events: none;
    transition: transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* Chamber 1: Single shadow from bottom-left */
.shadow-1-1 {
    bottom: 0;
    left: 0;
    width: 60%;
    height: 35%;
    background: linear-gradient(to top, rgba(13, 15, 26, 0.6), transparent);
    clip-path: polygon(0% 100%, 5% 30%, 45% 0%, 55% 100%);
}

/* Chamber 2: X-pattern shadows */
.shadow-2-1 {
    bottom: 0;
    left: 0;
    width: 55%;
    height: 40%;
    background: linear-gradient(to top, rgba(13, 15, 26, 0.5), transparent);
    clip-path: polygon(0% 100%, 8% 50%, 50% 10%, 60% 100%);
}

.shadow-2-2 {
    bottom: 0;
    right: 0;
    width: 50%;
    height: 38%;
    background: linear-gradient(to top, rgba(13, 15, 26, 0.5), transparent);
    clip-path: polygon(40% 100%, 50% 10%, 92% 50%, 100% 100%);
}

/* Chamber 3: Single atmospheric shadow */
.shadow-3-1 {
    bottom: 0;
    left: 10%;
    width: 70%;
    height: 30%;
    background: linear-gradient(to top, rgba(18, 16, 30, 0.6), transparent);
    clip-path: polygon(10% 100%, 20% 20%, 60% 0%, 80% 40%, 90% 100%);
}

/* Chamber 4: Shorter, fragmented shadows */
.shadow-4-1 {
    bottom: 0;
    left: 5%;
    width: 30%;
    height: 20%;
    background: linear-gradient(to top, rgba(13, 15, 26, 0.5), transparent);
    clip-path: polygon(0% 100%, 15% 30%, 40% 20%, 50% 100%);
}

.shadow-4-2 {
    bottom: 0;
    right: 10%;
    width: 25%;
    height: 18%;
    background: linear-gradient(to top, rgba(13, 15, 26, 0.5), transparent);
    clip-path: polygon(20% 100%, 35% 25%, 70% 15%, 80% 100%);
}

/* --- Amygdala Wash (Chamber 3) --- */
.amygdala-wash {
    position: absolute;
    top: 15%;
    left: 20%;
    width: 50%;
    height: 60%;
    background: var(--amygdala-rose);
    opacity: 0.06;
    clip-path: polygon(5% 10%, 90% 0%, 95% 85%, 10% 95%);
    pointer-events: none;
}

/* --- Thought Cards (Chamber 4) --- */
.thought-card {
    position: absolute;
    max-width: 28ch;
    padding: 1.8em 1.5em;
    border: 1px solid var(--synapse-silver);
    background-color: var(--thought-fog);
    transition: opacity 0.6s cubic-bezier(0.34, 1.56, 0.64, 1),
                transform 0.6s cubic-bezier(0.34, 1.56, 0.64, 1),
                border-color 0.6s ease;
    cursor: default;
}

.thought-card:hover {
    border-color: var(--dendrite-gold);
    transform: scale(1.02);
}

.thought-card.dimmed {
    opacity: 0.7;
}

.card-title {
    font-family: 'Playfair Display', serif;
    font-weight: 700;
    font-size: 1.3rem;
    letter-spacing: 0.06em;
    margin-bottom: 0.8em;
    color: var(--dendrite-gold);
}

.card-body {
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 300;
    font-size: 0.9rem;
    line-height: 1.7;
    color: var(--synapse-silver);
}

.card-connections {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
}

.connection-line {
    opacity: 0.15;
    transition: opacity 0.6s ease;
}

.connection-line.highlight {
    opacity: 0.6;
}

/* --- Return (Chamber 5) --- */
.return-title {
    position: absolute;
    top: 40%;
    left: 50%;
    transform: translateX(-50%);
    font-family: 'IBM Plex Sans', sans-serif;
    font-weight: 300;
    font-size: clamp(1.8rem, 4vw, 3.5rem);
    letter-spacing: 0.08em;
    color: var(--synapse-silver);
}

.return-subtitle {
    position: absolute;
    top: calc(40% + clamp(2.5rem, 5vw, 4.5rem));
    left: 50%;
    transform: translateX(-50%);
    font-family: 'Space Mono', monospace;
    font-weight: 400;
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--synapse-silver);
    opacity: 0.6;
}

/* --- Scroll-triggered Element Transitions --- */
.chamber-content,
.chamber-title,
.chamber-body,
.pull-quote,
.thought-card {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
                transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.chamber.in-view .chamber-content,
.chamber.in-view .chamber-title,
.chamber.in-view .chamber-body,
.chamber.in-view .pull-quote {
    opacity: 1;
    transform: translateY(0);
}

.chamber.in-view .thought-card {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered card appearance */
.chamber.in-view #card-1 { transition-delay: 0.1s; }
.chamber.in-view #card-2 { transition-delay: 0.3s; }
.chamber.in-view #card-3 { transition-delay: 0.5s; }

/* Chamber 1 hero is always visible (uses its own animation) */
.chamber-1 .chamber-content {
    opacity: 1;
    transform: none;
}

/* --- Chamber Dissolve Effect --- */
.chamber.dissolving .chamber-content > * {
    transition: transform 0.4s ease, opacity 0.4s ease;
}

.chamber.dissolving .chamber-title {
    opacity: 0;
    transform: translate(calc(var(--scatter-x, 10px)), calc(var(--scatter-y, -15px)));
}

.chamber.dissolving .chamber-body {
    opacity: 0;
    transform: translate(calc(var(--scatter-x, -12px)), calc(var(--scatter-y, 8px)));
}

.chamber.dissolving .pull-quote {
    opacity: 0;
    transform: translate(calc(var(--scatter-x, 15px)), calc(var(--scatter-y, 12px)));
}

/* --- Thread Node Labels --- */
.thread-label {
    font-family: 'Space Mono', monospace;
    font-size: 0.7rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    fill: var(--synapse-silver);
    opacity: 0;
    transition: opacity 0.4s ease;
}

.thread-node:hover + .thread-label,
.thread-node.active + .thread-label {
    opacity: 0.7;
}

/* --- Responsive Adjustments --- */
@media (max-width: 768px) {
    .chamber-frame {
        inset: 2vw;
    }

    .pull-quote {
        position: relative;
        right: auto;
        top: auto;
        margin: 2em 1em;
    }

    .pq-text {
        font-size: 1.8rem;
    }

    .thought-card {
        position: relative;
        top: auto !important;
        left: auto !important;
        right: auto !important;
        max-width: 100%;
        margin: 1.5em 1em;
    }

    .chamber-body {
        position: relative;
        top: auto !important;
        left: auto !important;
        transform: none !important;
        padding: 2em 1em;
        max-width: 100%;
    }

    .chamber-title {
        position: relative;
        top: auto !important;
        left: auto !important;
        padding: 1.5em 1em 0.5em;
    }

    .chamber-content {
        display: flex;
        flex-direction: column;
        min-height: auto;
    }

    #thought-thread {
        display: none;
    }

    .hero-title {
        font-size: clamp(2.2rem, 10vw, 4rem);
    }

    .card-connections {
        display: none;
    }
}

/* --- Selection Styling --- */
::selection {
    background: var(--amygdala-rose);
    color: var(--cortex-white);
}

/* --- Scrollbar Styling --- */
::-webkit-scrollbar {
    width: 4px;
}

::-webkit-scrollbar-track {
    background: var(--cerebral-midnight);
}

::-webkit-scrollbar-thumb {
    background: var(--synapse-silver);
    border-radius: 2px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--dendrite-gold);
}