/* ============================================
   concurrent.quest - Alpine Deep-Sea Expedition
   ============================================ */

:root {
    --color-abyssal: #0A2E38;
    --color-leather: #5C4428;
    --color-brass: #D4A853;
    --color-biolum: #00D4AA;
    --color-parchment: #E8DCC8;
    --color-saddle: #8B6914;
    --color-aquamarine: #7FCCB8;
    --color-trench: #062226;
    --color-moss: #2E3D32;
    --color-coral: #C4614A;
    --color-leather-mid: #6B5232;
    --panel-rotation: 1.5deg;
    --panel-offset: 30px;
    --gap-ocean: 24px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Nunito Sans', sans-serif;
    background: linear-gradient(180deg, var(--color-abyssal) 0%, var(--color-trench) 100%);
    color: var(--color-parchment);
    overflow-x: hidden;
    min-height: 100vh;
    position: relative;
}

/* ============================================
   OCEAN BACKGROUND LAYER
   ============================================ */

#ocean-layer {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
    overflow: hidden;
    background: linear-gradient(180deg, var(--color-abyssal) 0%, var(--color-trench) 100%);
}

#ocean-gradient {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

/* Bathymetric contour lines */
#bathymetric-contours {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.contour-bath {
    fill: none;
    stroke: var(--color-biolum);
    stroke-width: 0.8;
    opacity: 0.15;
}

/* ---- Bioluminescent Particles ---- */
#particles-container {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.particle {
    position: absolute;
    bottom: -20px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--color-biolum);
    opacity: 0.3;
    animation: drift linear infinite;
    will-change: transform;
}

.particle::after {
    content: '';
    position: absolute;
    top: -8px;
    left: -8px;
    width: 22px;
    height: 22px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(0,212,170,0.4) 0%, transparent 70%);
}

@keyframes drift {
    0% {
        transform: translateY(0) translateX(0);
        opacity: 0;
    }
    5% {
        opacity: 0.3;
    }
    50% {
        transform: translateY(-50vh) translateX(30px);
        opacity: 0.35;
    }
    95% {
        opacity: 0.15;
    }
    100% {
        transform: translateY(-110vh) translateX(-20px);
        opacity: 0;
    }
}

/* ---- Jellyfish ---- */
.jellyfish {
    position: absolute;
    opacity: 0.5;
    will-change: transform;
}

.jelly-1 {
    left: 8%;
    top: 55%;
    animation: jellyDrift1 30s ease-in-out infinite;
}

.jelly-2 {
    right: 12%;
    top: 35%;
    animation: jellyDrift2 35s ease-in-out infinite;
    animation-delay: -10s;
}

.jelly-3 {
    left: 55%;
    top: 70%;
    animation: jellyDrift3 28s ease-in-out infinite;
    animation-delay: -5s;
}

@keyframes jellyDrift1 {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(20px, -40px) rotate(3deg); }
    50% { transform: translate(-15px, -80px) rotate(-2deg); }
    75% { transform: translate(10px, -40px) rotate(1deg); }
}

@keyframes jellyDrift2 {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(-25px, -30px) rotate(-3deg); }
    50% { transform: translate(20px, -70px) rotate(2deg); }
    75% { transform: translate(-10px, -35px) rotate(-1deg); }
}

@keyframes jellyDrift3 {
    0%, 100% { transform: translate(0, 0) rotate(0deg); }
    25% { transform: translate(15px, -50px) rotate(2deg); }
    50% { transform: translate(-20px, -90px) rotate(-3deg); }
    75% { transform: translate(10px, -45px) rotate(1deg); }
}

/* ---- Anglerfish ---- */
.anglerfish {
    position: absolute;
    opacity: 0.4;
    will-change: transform;
}

.angler-1 {
    left: 70%;
    top: 60%;
    animation: anglerDrift1 40s ease-in-out infinite;
}

.angler-2 {
    left: 20%;
    top: 80%;
    animation: anglerDrift2 45s ease-in-out infinite;
    animation-delay: -15s;
}

@keyframes anglerDrift1 {
    0%, 100% { transform: translate(0, 0); }
    33% { transform: translate(-60px, -20px); }
    66% { transform: translate(40px, 15px); }
}

@keyframes anglerDrift2 {
    0%, 100% { transform: translate(0, 0); }
    33% { transform: translate(50px, -15px); }
    66% { transform: translate(-30px, 10px); }
}

/* ============================================
   SECTIONS
   ============================================ */

.section {
    position: relative;
    z-index: 2;
    min-height: 100vh;
    padding: var(--gap-ocean);
}

#summit-arrival {
    min-height: 100vh;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: center;
    padding-top: 10vh;
    padding-bottom: 10vh;
}

#fracture-zone {
    min-height: 200vh;
    display: flex;
    flex-wrap: wrap;
    align-content: flex-start;
    gap: var(--gap-ocean);
    padding-top: 5vh;
}

#the-descent {
    min-height: 200vh;
    display: flex;
    flex-wrap: wrap;
    align-content: flex-start;
    gap: var(--gap-ocean);
    padding-top: 5vh;
}

#the-convergence {
    min-height: 200vh;
    display: flex;
    flex-wrap: wrap;
    align-content: flex-start;
    gap: var(--gap-ocean);
    padding-top: 5vh;
}

#trench-floor {
    min-height: 120vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--gap-ocean);
    padding-top: 10vh;
    padding-bottom: 15vh;
}

/* ============================================
   PANELS - Base Styles
   ============================================ */

.panel {
    position: relative;
    padding: clamp(24px, 4vw, 48px);
    border-radius: 2px;
    transition: opacity 0.8s ease, transform 0.8s ease;
    opacity: 0;
    transform: translateY(40px) rotate(calc(var(--panel-rotation) * var(--rotation-dir, 1)));
}

.panel.visible {
    opacity: 1;
    transform: translateY(0) rotate(calc(var(--panel-rotation) * var(--rotation-dir, 1) * 0.5));
}

/* ---- Leather Texture SVG Pattern ---- */
.earth-panel {
    background-color: var(--color-leather);
    background-image:
        url("data:image/svg+xml,%3Csvg width='20' height='20' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='3' cy='5' r='0.8' fill='%236B5232' opacity='0.6'/%3E%3Ccircle cx='11' cy='2' r='0.6' fill='%235C4428' opacity='0.5'/%3E%3Ccircle cx='7' cy='11' r='0.8' fill='%236B5232' opacity='0.55'/%3E%3Ccircle cx='16' cy='8' r='0.7' fill='%235C4428' opacity='0.5'/%3E%3Ccircle cx='1' cy='17' r='0.6' fill='%236B5232' opacity='0.6'/%3E%3Ccircle cx='13' cy='16' r='0.8' fill='%235C4428' opacity='0.55'/%3E%3Ccircle cx='18' cy='14' r='0.5' fill='%236B5232' opacity='0.5'/%3E%3Ccircle cx='9' cy='18' r='0.7' fill='%236B5232' opacity='0.6'/%3E%3C/svg%3E");
    border: 2px dashed var(--color-brass);
    box-shadow: inset 0 0 0 4px rgba(92, 68, 40, 0.8);
    z-index: 3;
}

.earth-panel.fading {
    background-color: rgba(92, 68, 40, 0.6);
}

/* ---- Ocean Panel ---- */
.ocean-panel {
    background: var(--color-abyssal);
    border: 2px solid var(--color-biolum);
    box-shadow: inset 0 0 20px rgba(0, 212, 170, 0.1), 0 0 30px rgba(0, 212, 170, 0.05);
    z-index: 3;
}

/* ---- Transition Panel ---- */
.transition-panel {
    background: rgba(92, 68, 40, 0.7);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    border: 1px solid rgba(212, 168, 83, 0.4);
    z-index: 2;
}

/* ---- Composite Panel ---- */
.composite-panel {
    background:
        linear-gradient(135deg, rgba(92, 68, 40, 0.5) 0%, rgba(10, 46, 56, 0.7) 100%);
    background-image:
        url("data:image/svg+xml,%3Csvg width='20' height='20' xmlns='http://www.w3.org/2000/svg'%3E%3Ccircle cx='3' cy='5' r='0.8' fill='%236B5232' opacity='0.3'/%3E%3Ccircle cx='11' cy='2' r='0.6' fill='%235C4428' opacity='0.25'/%3E%3Ccircle cx='7' cy='11' r='0.8' fill='%236B5232' opacity='0.28'/%3E%3Ccircle cx='16' cy='8' r='0.7' fill='%235C4428' opacity='0.25'/%3E%3C/svg%3E"),
        linear-gradient(135deg, rgba(92, 68, 40, 0.5) 0%, rgba(10, 46, 56, 0.7) 100%);
    border: 2px solid var(--color-brass);
    box-shadow:
        inset 0 0 20px rgba(0, 212, 170, 0.08),
        0 0 20px rgba(0, 212, 170, 0.05);
    z-index: 3;
}

/* ---- Dissolving Panel ---- */
.dissolving-panel {
    background: rgba(92, 68, 40, 0.2);
    border: 1px solid rgba(212, 168, 83, 0.2);
    z-index: 2;
}

/* ============================================
   PANEL POSITIONING - Broken Grid
   ============================================ */

/* Summit panels */
.panel-summit-1 {
    --rotation-dir: 1;
    width: clamp(280px, 40vw, 500px);
    margin-right: -40px;
    margin-top: 20px;
    transform: translateY(40px) rotate(1.8deg);
}
.panel-summit-1.visible {
    transform: translateY(0) rotate(1deg);
}

.panel-summit-2 {
    --rotation-dir: -1;
    width: clamp(240px, 35vw, 420px);
    margin-left: -30px;
    margin-top: -60px;
    transform: translateY(40px) rotate(-2.2deg);
}
.panel-summit-2.visible {
    transform: translateY(0) rotate(-1.2deg);
}

.panel-summit-3 {
    --rotation-dir: 1;
    width: clamp(220px, 30vw, 380px);
    margin-top: -20px;
    margin-left: 60px;
    transform: translateY(40px) rotate(0.8deg);
}
.panel-summit-3.visible {
    transform: translateY(0) rotate(0.5deg);
}

/* Fracture panels */
.panel-fracture-1 {
    --rotation-dir: -1;
    width: clamp(300px, 55vw, 700px);
    margin-left: 5vw;
    transform: translateY(40px) rotate(-1.5deg);
}
.panel-fracture-1.visible {
    transform: translateY(0) rotate(-0.8deg);
}

.panel-fracture-2 {
    --rotation-dir: 1;
    width: clamp(280px, 45vw, 580px);
    margin-left: auto;
    margin-right: 3vw;
    margin-top: -40px;
    transform: translateY(40px) rotate(2deg);
}
.panel-fracture-2.visible {
    transform: translateY(0) rotate(1.2deg);
}

.panel-fracture-3 {
    --rotation-dir: -1;
    width: clamp(240px, 38vw, 460px);
    margin-left: 15vw;
    margin-top: 30px;
    transform: translateY(40px) rotate(-1deg);
}
.panel-fracture-3.visible {
    transform: translateY(0) rotate(-0.6deg);
}

/* Descent panels */
.panel-descent-1 {
    --rotation-dir: 1;
    width: clamp(280px, 50vw, 620px);
    margin-left: 8vw;
    transform: translateY(40px) rotate(2.5deg);
}
.panel-descent-1.visible {
    transform: translateY(0) rotate(1.5deg);
}

.panel-descent-2 {
    --rotation-dir: -1;
    width: clamp(260px, 48vw, 600px);
    margin-left: auto;
    margin-right: 5vw;
    margin-top: -30px;
    transform: translateY(40px) rotate(-3deg);
}
.panel-descent-2.visible {
    transform: translateY(0) rotate(-1.8deg);
}

.panel-descent-3 {
    --rotation-dir: 1;
    width: clamp(240px, 40vw, 500px);
    margin-left: 12vw;
    margin-top: 50px;
    transform: translateY(40px) rotate(2.8deg);
}
.panel-descent-3.visible {
    transform: translateY(0) rotate(1.6deg);
}

.panel-descent-4 {
    --rotation-dir: -1;
    width: clamp(260px, 42vw, 520px);
    margin-left: auto;
    margin-right: 8vw;
    margin-top: -20px;
    transform: translateY(40px) rotate(-2.2deg);
}
.panel-descent-4.visible {
    transform: translateY(0) rotate(-1.3deg);
}

/* Convergence panels */
.panel-converge-1 {
    --rotation-dir: -1;
    width: clamp(300px, 58vw, 720px);
    margin-left: 6vw;
    transform: translateY(40px) rotate(-1.8deg);
}
.panel-converge-1.visible {
    transform: translateY(0) rotate(-1deg);
}

.panel-converge-2 {
    --rotation-dir: 1;
    width: clamp(280px, 50vw, 640px);
    margin-left: auto;
    margin-right: 4vw;
    margin-top: -30px;
    transform: translateY(40px) rotate(2.2deg);
}
.panel-converge-2.visible {
    transform: translateY(0) rotate(1.4deg);
}

.panel-converge-3 {
    --rotation-dir: -1;
    width: clamp(240px, 42vw, 500px);
    margin-left: 18vw;
    margin-top: 40px;
    transform: translateY(40px) rotate(-1.2deg);
}
.panel-converge-3.visible {
    transform: translateY(0) rotate(-0.7deg);
}

/* Trench panels */
.panel-trench-1 {
    --rotation-dir: 1;
    width: clamp(260px, 50vw, 600px);
    transform: translateY(40px) rotate(0.5deg);
}
.panel-trench-1.visible {
    transform: translateY(0) rotate(0.3deg);
}

/* ============================================
   TYPOGRAPHY
   ============================================ */

/* Primary Headings - Josefin Sans 700 */
.title-main {
    font-family: 'Josefin Sans', sans-serif;
    font-weight: 700;
    font-size: clamp(32px, 5vw, 72px);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-brass);
    line-height: 1.1;
}

.title-quest {
    color: var(--color-biolum);
}

.title-final {
    font-family: 'Josefin Sans', sans-serif;
    font-weight: 700;
    font-size: clamp(36px, 6vw, 84px);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-brass);
    text-align: center;
    line-height: 1.1;
}

.dot-quest {
    color: var(--color-biolum);
}

/* Section titles */
.section-title {
    font-family: 'Josefin Sans', sans-serif;
    font-weight: 700;
    font-size: clamp(24px, 3.5vw, 48px);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-abyssal);
    margin-bottom: 1em;
}

.ocean-title {
    color: var(--color-brass);
}

.convergence-title {
    color: var(--color-brass);
}

/* Secondary Headings - Exo 2 500 */
.subtitle {
    font-family: 'Exo 2', sans-serif;
    font-weight: 500;
    font-size: clamp(16px, 2.5vw, 28px);
    letter-spacing: 0.06em;
    color: var(--color-aquamarine);
    margin-bottom: 0.5em;
}

.sub-heading {
    font-family: 'Exo 2', sans-serif;
    font-weight: 500;
    font-size: clamp(16px, 2.5vw, 28px);
    letter-spacing: 0.06em;
    color: var(--color-saddle);
    margin-bottom: 0.8em;
}

.ocean-sub {
    color: var(--color-aquamarine);
}

.convergence-sub {
    color: var(--color-aquamarine);
}

/* Body Text - Nunito Sans */
.body-text {
    font-family: 'Nunito Sans', sans-serif;
    font-weight: 400;
    font-size: clamp(15px, 1.8vw, 18px);
    line-height: 1.72;
    letter-spacing: 0.01em;
    color: var(--color-moss);
    margin-bottom: 1.2em;
}

.ocean-text {
    color: var(--color-parchment);
}

.trench-text {
    color: var(--color-parchment);
    opacity: 0.8;
}

/* Accent Data Text - Orbitron 500 */
.data-readout {
    font-family: 'Orbitron', sans-serif;
    font-weight: 500;
    font-size: clamp(11px, 1.2vw, 14px);
    letter-spacing: 0.18em;
    color: var(--color-biolum);
    display: block;
    margin-top: 1em;
}

.final-readout {
    font-size: clamp(10px, 1vw, 13px);
    opacity: 0.7;
    margin-top: 1.5em;
}

/* ============================================
   TOPOGRAPHIC CONTOUR LINES ON PANELS
   ============================================ */

.topographic-lines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    overflow: hidden;
    opacity: 0.2;
}

.contour-topo {
    fill: none;
    stroke: var(--color-saddle);
    stroke-width: 1;
    opacity: 0.2;
}

.contour-bath-panel {
    fill: none;
    stroke: var(--color-biolum);
    stroke-width: 0.8;
    opacity: 0.15;
}

/* ============================================
   MOUNTAIN RIDGELINES
   ============================================ */

.ridgeline {
    position: relative;
    z-index: 2;
    width: 100%;
    height: auto;
    display: block;
    margin: -2px 0;
}

.ridgeline-summit {
    margin-top: -80px;
}

.ridgeline-fracture {
    margin-top: 60px;
}

.ridgeline-inverted {
    margin-bottom: 40px;
}

.ridge-path {
    stroke: none;
    stroke-dasharray: 2000;
    stroke-dashoffset: 2000;
    transition: stroke-dashoffset 2s ease;
}

.ridgeline.visible .ridge-path {
    stroke-dashoffset: 0;
}

/* ============================================
   INSTRUMENTS
   ============================================ */

.instrument {
    display: inline-block;
    margin-top: 1.5em;
    opacity: 0.85;
}

.compass-needle {
    transform-origin: 60px 60px;
    animation: needleWobble 8s ease-in-out infinite;
}

.altimeter-needle {
    transform-origin: 60px 60px;
    animation: altimeterSweep 12s ease-in-out infinite;
}

@keyframes needleWobble {
    0%, 100% { transform: rotate(0deg); }
    25% { transform: rotate(8deg); }
    50% { transform: rotate(-5deg); }
    75% { transform: rotate(3deg); }
}

@keyframes altimeterSweep {
    0%, 100% { transform: rotate(-20deg); }
    50% { transform: rotate(20deg); }
}

/* Spinning compass in convergence */
.spinning-needle {
    transform-origin: 70px 70px;
    animation: compassSpin 20s linear infinite;
}

@keyframes compassSpin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Mercury level animation */
.mercury-level {
    animation: mercuryRise 6s ease-in-out infinite alternate;
}

@keyframes mercuryRise {
    0% { height: 30px; y: 78px; }
    100% { height: 48px; y: 60px; }
}

/* ============================================
   CORAL FRACTALS
   ============================================ */

.coral-fractals {
    position: relative;
    z-index: 2;
    width: 100%;
    height: auto;
    margin-top: auto;
}

.coral-group {
    opacity: 0;
    transition: opacity 1.5s ease;
}

.coral-fractals.visible .coral-group {
    opacity: 1;
}

.coral-1 { transition-delay: 0s; }
.coral-2 { transition-delay: 0.3s; }
.coral-3 { transition-delay: 0.6s; }
.coral-4 { transition-delay: 0.9s; }
.coral-5 { transition-delay: 0.4s; }
.coral-6 { transition-delay: 0.7s; }

/* ============================================
   FINAL STATEMENT
   ============================================ */

.final-statement {
    text-align: center;
    z-index: 3;
    padding: 5vh 2vw;
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 1.2s ease, transform 1.2s ease;
}

.final-statement.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ============================================
   SCROLL-DRIVEN PANEL SEPARATION
   ============================================ */

.panel[data-scroll-expanded="true"] {
    margin-top: 60px;
    margin-bottom: 60px;
}

/* ============================================
   MOBILE RESPONSIVE
   ============================================ */

@media (max-width: 768px) {
    :root {
        --gap-ocean: 12px;
        --panel-rotation: 1deg;
        --panel-offset: 15px;
    }

    .section {
        padding: 12px;
    }

    #summit-arrival {
        flex-direction: column;
        align-items: center;
    }

    .panel-summit-1,
    .panel-summit-2,
    .panel-summit-3,
    .panel-fracture-1,
    .panel-fracture-2,
    .panel-fracture-3,
    .panel-descent-1,
    .panel-descent-2,
    .panel-descent-3,
    .panel-descent-4,
    .panel-converge-1,
    .panel-converge-2,
    .panel-converge-3,
    .panel-trench-1 {
        width: calc(100% - 24px);
        margin-left: 12px;
        margin-right: 12px;
        margin-top: 12px;
    }

    .panel-summit-2 {
        margin-top: -20px;
    }

    .panel-fracture-2 {
        margin-top: 12px;
    }

    .panel-descent-2 {
        margin-top: 12px;
    }

    .panel-converge-2 {
        margin-top: 12px;
    }

    .jellyfish {
        transform: scale(0.7);
    }

    .anglerfish {
        display: none;
    }

    .instrument svg {
        width: 80px;
        height: auto;
    }
}

/* ============================================
   STAGGER ENTRANCE DELAYS
   ============================================ */

.panel[data-index="0"] { transition-delay: 0ms; }
.panel[data-index="1"] { transition-delay: 150ms; }
.panel[data-index="2"] { transition-delay: 300ms; }
.panel[data-index="3"] { transition-delay: 0ms; }
.panel[data-index="4"] { transition-delay: 150ms; }
.panel[data-index="5"] { transition-delay: 300ms; }
.panel[data-index="6"] { transition-delay: 0ms; }
.panel[data-index="7"] { transition-delay: 150ms; }
.panel[data-index="8"] { transition-delay: 300ms; }
.panel[data-index="9"] { transition-delay: 450ms; }
.panel[data-index="10"] { transition-delay: 0ms; }
.panel[data-index="11"] { transition-delay: 150ms; }
.panel[data-index="12"] { transition-delay: 300ms; }
.panel[data-index="13"] { transition-delay: 0ms; }

/* ============================================
   GLOW EFFECTS
   ============================================ */

.ocean-panel::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    border: 1px solid var(--color-biolum);
    opacity: 0.3;
    border-radius: 4px;
    animation: glowPulse 4s ease-in-out infinite;
}

@keyframes glowPulse {
    0%, 100% { opacity: 0.2; box-shadow: 0 0 10px rgba(0, 212, 170, 0.1); }
    50% { opacity: 0.4; box-shadow: 0 0 25px rgba(0, 212, 170, 0.2); }
}

/* Composite panel dual glow */
.composite-panel::before {
    content: '';
    position: absolute;
    top: -1px;
    left: -1px;
    right: -1px;
    bottom: -1px;
    border: 1px solid rgba(0, 212, 170, 0.2);
    border-radius: 2px;
    animation: compositeGlow 5s ease-in-out infinite;
}

@keyframes compositeGlow {
    0%, 100% {
        box-shadow: 0 0 8px rgba(0, 212, 170, 0.05), inset 0 0 8px rgba(212, 168, 83, 0.05);
    }
    50% {
        box-shadow: 0 0 20px rgba(0, 212, 170, 0.15), inset 0 0 15px rgba(212, 168, 83, 0.1);
    }
}