/* ================================================
   lower.quest — Design System
   Neubrutalism + Deep Burgundy + Kinetic Typography
   ================================================ */

/* --- CSS Custom Properties --- */
:root {
    --cream: #f5efe0;
    --parchment: #e8ddd0;
    --caramel: #d4a574;
    --slate: #4a4a5a;
    --burgundy: #6b2040;
    --dark-burgundy: #3a0f22;
    --near-black: #1a0810;

    --font-display: 'Syne', sans-serif;
    --font-body: 'Space Grotesk', sans-serif;
    --font-accent: 'Lora', serif;
    --font-small: 'Inter', sans-serif;

    --border-thick: 4px solid var(--slate);
    --border-thicker: 6px solid var(--slate);
    --shadow-brutal: 6px 6px 0px var(--slate);
    --shadow-brutal-lg: 10px 10px 0px var(--near-black);
    --shadow-brutal-burgundy: 6px 6px 0px var(--dark-burgundy);
}

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

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

body {
    font-family: var(--font-body);
    background-color: var(--cream);
    color: var(--near-black);
    overflow-x: hidden;
}

/* --- Depth Compass (Fixed, Bottom-Right) --- */
#depth-compass {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 1000;
    width: 90px;
    height: 90px;
}

.compass-ring {
    width: 90px;
    height: 90px;
    border-radius: 50%;
    border: 4px solid var(--slate);
    background: var(--cream);
    box-shadow: var(--shadow-brutal);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

.compass-dial {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    background: conic-gradient(
        var(--burgundy) 0%,
        var(--cream) 0%
    );
    opacity: 0.3;
    transition: background 0.5s ease;
}

.compass-label {
    font-family: var(--font-small);
    font-size: 8px;
    font-weight: 500;
    letter-spacing: 0.15em;
    color: var(--slate);
    position: relative;
    z-index: 2;
    text-transform: uppercase;
}

.compass-level {
    font-family: var(--font-display);
    font-size: 16px;
    font-weight: 800;
    color: var(--burgundy);
    position: relative;
    z-index: 2;
    line-height: 1;
}

/* --- Scroll Progress (Left Side, Vertical) --- */
#scroll-progress {
    position: fixed;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    width: 4px;
    height: 200px;
    background: var(--parchment);
    border: 2px solid var(--slate);
    z-index: 1000;
}

.progress-fill {
    width: 100%;
    height: 0%;
    background: var(--burgundy);
    transition: height 0.3s ease;
}

/* --- Depth Zones (Each 100vh) --- */
.depth-zone {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 60px 40px;
}

.zone-content {
    max-width: 800px;
    width: 100%;
    position: relative;
    z-index: 2;
    text-align: center;
}

/* Zone 0: Surface */
.zone-surface {
    background-color: var(--cream);
    background-image:
        linear-gradient(180deg, var(--cream) 0%, var(--parchment) 100%);
}

/* Zone 1: Shallow */
.zone-shallow {
    background-color: var(--parchment);
    background-image:
        linear-gradient(180deg, var(--parchment) 0%, var(--caramel) 30%, var(--parchment) 100%);
    background-size: 100% 100%;
    background-blend-mode: soft-light;
}

/* Zone 2: Mid */
.zone-mid {
    background-color: #c49264;
    background-image:
        linear-gradient(180deg, var(--caramel) 0%, var(--slate) 100%);
}

/* Zone 3: Deep */
.zone-deep {
    background-color: var(--dark-burgundy);
    background-image:
        linear-gradient(180deg, var(--slate) 0%, var(--dark-burgundy) 40%, var(--near-black) 100%);
    color: var(--parchment);
}

/* Zone 4: Core */
.zone-core {
    background-color: var(--near-black);
    background-image:
        radial-gradient(ellipse at center, var(--dark-burgundy) 0%, var(--near-black) 70%);
    color: var(--caramel);
}

/* --- Kinetic Typography --- */
.kinetic-title {
    font-family: var(--font-display);
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 0.95;
    text-transform: lowercase;
    margin-bottom: 30px;
}

h1.kinetic-title {
    font-size: clamp(3rem, 8vw, 7rem);
}

h2.kinetic-title {
    font-size: clamp(1.8rem, 4vw, 3.5rem);
}

.kinetic-title .char {
    display: inline-block;
    opacity: 0;
    transform: translateY(40px) rotate(5deg);
    transition: opacity 0.4s ease, transform 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.kinetic-title.visible .char {
    opacity: 1;
    transform: translateY(0) rotate(0deg);
}

/* --- Zone Subtitle --- */
.zone-subtitle {
    font-family: var(--font-accent);
    font-style: italic;
    font-size: clamp(1rem, 2vw, 1.4rem);
    color: var(--burgundy);
    margin-bottom: 40px;
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease 0.5s, transform 0.6s ease 0.5s;
}

.zone-surface.visible .zone-subtitle {
    opacity: 1;
    transform: translateY(0);
}

/* --- Arrow Down --- */
.arrow-down {
    margin-top: 40px;
    animation: bobDown 2s ease-in-out infinite;
    opacity: 0;
    transition: opacity 0.8s ease 0.8s;
}

.zone-surface.visible .arrow-down {
    opacity: 1;
}

@keyframes bobDown {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(15px); }
}

/* --- Neubrutalist Cards --- */
.neubrutalist-card {
    background: var(--cream);
    border: var(--border-thicker);
    box-shadow: var(--shadow-brutal);
    padding: 30px 35px;
    text-align: left;
    margin: 20px auto;
    max-width: 600px;
    position: relative;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.depth-zone.visible .neubrutalist-card {
    opacity: 1;
    transform: translateY(0);
}

.card-offset {
    transform: translateY(30px) rotate(-1deg);
}

.depth-zone.visible .card-offset {
    transform: translateY(0) rotate(-1deg);
}

.card-dark {
    background: var(--near-black);
    border-color: var(--burgundy);
    box-shadow: var(--shadow-brutal-burgundy);
    color: var(--parchment);
}

.card-core {
    background: var(--dark-burgundy);
    border-color: var(--caramel);
    box-shadow: 6px 6px 0px var(--caramel);
    color: var(--cream);
}

.zone-body {
    font-family: var(--font-body);
    font-size: clamp(0.95rem, 1.5vw, 1.15rem);
    font-weight: 400;
    line-height: 1.7;
    color: inherit;
}

/* --- Depth Markers --- */
.depth-marker {
    margin-top: 40px;
    display: flex;
    align-items: baseline;
    justify-content: center;
    gap: 10px;
    opacity: 0;
    transition: opacity 0.6s ease 0.3s;
}

.depth-zone.visible .depth-marker {
    opacity: 1;
}

.depth-number {
    font-family: var(--font-display);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    color: var(--burgundy);
    letter-spacing: -0.03em;
}

.zone-deep .depth-number,
.zone-core .depth-number {
    color: var(--caramel);
}

.depth-unit {
    font-family: var(--font-small);
    font-size: clamp(0.7rem, 1vw, 0.9rem);
    font-weight: 300;
    color: var(--slate);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.zone-deep .depth-unit,
.zone-core .depth-unit {
    color: var(--parchment);
}

.depth-marker-final {
    flex-direction: column;
    align-items: center;
    gap: 5px;
}

/* --- Vintage Frames --- */
.vintage-frame {
    width: 120px;
    height: 160px;
    border: 4px solid var(--slate);
    box-shadow: var(--shadow-brutal);
    position: absolute;
    overflow: hidden;
    z-index: 1;
}

.vintage-frame::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: var(--burgundy);
    mix-blend-mode: multiply;
    opacity: 0.4;
    pointer-events: none;
}

.frame-inner {
    width: 100%;
    height: 100%;
}

.vintage-illustration {
    width: 100%;
    height: 100%;
}

.frame-top-right {
    top: -20px;
    right: -30px;
    transform: rotate(3deg);
}

.frame-left {
    top: 20px;
    left: -60px;
    transform: rotate(-2deg);
}

.frame-right {
    top: -10px;
    right: -50px;
    transform: rotate(2deg);
}

.frame-center {
    top: -30px;
    left: 50%;
    transform: translateX(-50%) rotate(-1deg);
}

.frame-bottom {
    bottom: -20px;
    right: 40px;
    transform: rotate(1deg);
}

/* --- Retro Patterns --- */
.retro-pattern {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    opacity: 0.06;
}

.pattern-grid {
    background-image:
        linear-gradient(var(--slate) 1px, transparent 1px),
        linear-gradient(90deg, var(--slate) 1px, transparent 1px);
    background-size: 40px 40px;
}

.pattern-dots {
    background-image: radial-gradient(var(--burgundy) 1.5px, transparent 1.5px);
    background-size: 25px 25px;
}

.pattern-zigzag {
    background-image:
        linear-gradient(135deg, var(--slate) 25%, transparent 25%),
        linear-gradient(225deg, var(--slate) 25%, transparent 25%),
        linear-gradient(315deg, var(--slate) 25%, transparent 25%),
        linear-gradient(45deg, var(--slate) 25%, transparent 25%);
    background-size: 30px 15px;
    background-position: 0 0, 15px 0, 15px -7.5px, 0 7.5px;
}

.pattern-waves {
    background-image:
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 20px,
            rgba(212, 165, 116, 0.1) 20px,
            rgba(212, 165, 116, 0.1) 22px
        );
}

/* --- Floating Elements (Zone 2) --- */
.floating-elements {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.float-rock {
    position: absolute;
    background: var(--slate);
    border: 2px solid var(--near-black);
    border-radius: 30% 70% 50% 50%;
    opacity: 0.15;
}

.rock-1 {
    width: 60px;
    height: 40px;
    top: 15%;
    left: 10%;
    animation: floatRock 8s ease-in-out infinite;
}

.rock-2 {
    width: 40px;
    height: 30px;
    top: 60%;
    right: 15%;
    animation: floatRock 6s ease-in-out infinite 2s;
}

.rock-3 {
    width: 50px;
    height: 35px;
    bottom: 20%;
    left: 25%;
    animation: floatRock 10s ease-in-out infinite 4s;
}

@keyframes floatRock {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    25% { transform: translateY(-10px) rotate(2deg); }
    75% { transform: translateY(10px) rotate(-2deg); }
}

/* --- Bioluminescence (Zone 3) --- */
.bioluminescence {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.glow-dot {
    position: absolute;
    border-radius: 50%;
    background: radial-gradient(circle, var(--caramel) 0%, transparent 70%);
    opacity: 0;
    animation: glowPulse 4s ease-in-out infinite;
}

.glow-1 { width: 8px; height: 8px; top: 20%; left: 15%; animation-delay: 0s; }
.glow-2 { width: 12px; height: 12px; top: 40%; left: 70%; animation-delay: 0.8s; }
.glow-3 { width: 6px; height: 6px; top: 65%; left: 30%; animation-delay: 1.6s; }
.glow-4 { width: 10px; height: 10px; top: 30%; right: 20%; animation-delay: 2.4s; }
.glow-5 { width: 7px; height: 7px; top: 75%; left: 60%; animation-delay: 3.2s; }
.glow-6 { width: 14px; height: 14px; top: 50%; left: 45%; animation-delay: 0.4s; }
.glow-7 { width: 5px; height: 5px; top: 85%; right: 35%; animation-delay: 1.2s; }

@keyframes glowPulse {
    0%, 100% { opacity: 0; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.5); }
}

/* --- Core Pulse (Zone 4) --- */
.core-pulse {
    width: 120px;
    height: 120px;
    margin: 40px auto;
    border-radius: 50%;
    background: radial-gradient(circle, var(--burgundy) 0%, transparent 70%);
    animation: corePulse 3s ease-in-out infinite;
    opacity: 0;
    transition: opacity 1s ease 0.5s;
}

.zone-core.visible .core-pulse {
    opacity: 1;
}

@keyframes corePulse {
    0%, 100% { transform: scale(1); box-shadow: 0 0 30px var(--burgundy); }
    50% { transform: scale(1.15); box-shadow: 0 0 60px var(--burgundy), 0 0 120px var(--dark-burgundy); }
}

/* --- Closing Text --- */
.closing-text {
    font-family: var(--font-accent);
    font-style: italic;
    font-size: clamp(0.9rem, 1.5vw, 1.2rem);
    color: var(--caramel);
    margin-top: 40px;
    opacity: 0;
    transition: opacity 1s ease 1s;
}

.zone-core.visible .closing-text {
    opacity: 0.8;
}

/* --- Counter Animation Number Styling --- */
.counter-animate {
    font-variant-numeric: tabular-nums;
}

/* --- Responsive Adjustments --- */
@media (max-width: 768px) {
    .depth-zone {
        padding: 40px 20px;
    }

    #depth-compass {
        bottom: 15px;
        right: 15px;
        width: 70px;
        height: 70px;
    }

    .compass-ring {
        width: 70px;
        height: 70px;
    }

    .compass-level {
        font-size: 13px;
    }

    #scroll-progress {
        left: 8px;
        height: 150px;
    }

    .vintage-frame {
        width: 80px;
        height: 110px;
    }

    .frame-left { left: -20px; }
    .frame-right { right: -20px; }
    .frame-top-right { right: -10px; }

    .neubrutalist-card {
        padding: 20px 25px;
    }
}

@media (max-width: 480px) {
    .vintage-frame {
        display: none;
    }

    .zone-content {
        padding: 0 10px;
    }
}