:root {
    --color-dark: #141618;
    --color-amber: #d4a030;
    --color-green: #30d460;
    --color-bright-green: #40e870;
    --color-copper: #c46030;
    --color-red: #d43030;
    --color-gold: #e8b030;
    --color-pale-gold: #e8d8a0;
    --color-near-black: #060608;
    --color-panel: #2a2a30;

    --font-heading: 'Orbitron', 'Space Mono', monospace;
    --font-mono: 'Space Mono', monospace;
    --font-sans: 'Exo 2', 'Roboto', sans-serif;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html, body {
    width: 100%;
    height: 100%;
    overflow-x: hidden;
    background-color: var(--color-near-black);
    color: var(--color-pale-gold);
    font-family: var(--font-sans);
    scroll-behavior: smooth;
}

/* STARFIELD */
.starfield-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
    background-color: var(--color-near-black);
}

.starfield-layer {
    position: absolute;
    width: 100%;
    height: 200vh;
    top: 0;
    left: 0;
}

.starfield-layer div {
    position: absolute;
    width: 1px;
    height: 1px;
    background-color: white;
    border-radius: 50%;
}

@keyframes drift-slow {
    to {
        transform: translateY(100vh);
    }
}

@keyframes drift-medium {
    to {
        transform: translateY(100vh);
    }
}

@keyframes drift-fast {
    to {
        transform: translateY(100vh);
    }
}

#starfield-1 {
    animation: drift-slow 60s linear infinite;
}

#starfield-2 {
    animation: drift-medium 40s linear infinite;
}

#starfield-3 {
    animation: drift-fast 20s linear infinite;
}

/* HUD OVERLAY */
.hud-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 10;
    pointer-events: none;
}

/* HUD FRAME AND BRACKETS */
.hud-frame {
    position: absolute;
    width: 100%;
    height: 100%;
}

.corner {
    position: absolute;
    width: 40px;
    height: 40px;
    border: 2px solid var(--color-amber);
}

.corner.top-left {
    top: 20px;
    left: 20px;
    border-right: none;
    border-bottom: none;
}

.corner.top-right {
    top: 20px;
    right: 20px;
    border-left: none;
    border-bottom: none;
}

.corner.bottom-left {
    bottom: 20px;
    left: 20px;
    border-right: none;
    border-top: none;
}

.corner.bottom-right {
    bottom: 20px;
    right: 20px;
    border-left: none;
    border-top: none;
}

.measurement-lines {
    position: absolute;
    width: 100%;
    height: 100%;
}

.horizontal-line, .vertical-line {
    position: absolute;
    background-color: var(--color-amber);
    opacity: 0.3;
}

.horizontal-line.top {
    top: 80px;
    left: 0;
    width: 100%;
    height: 1px;
}

.horizontal-line.bottom {
    bottom: 80px;
    left: 0;
    width: 100%;
    height: 1px;
}

.vertical-line.left {
    left: 80px;
    top: 0;
    width: 1px;
    height: 100%;
}

.vertical-line.right {
    right: 80px;
    top: 0;
    width: 1px;
    height: 100%;
}

/* HUD HEADER */
.hud-header {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 120px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    border-bottom: 2px solid var(--color-amber);
    background: linear-gradient(180deg, rgba(20, 22, 24, 0.8) 0%, rgba(20, 22, 24, 0.3) 100%);
    z-index: 15;
}

.compass-heading, .fuel-gauge {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--color-green);
    font-family: var(--font-heading);
    font-size: clamp(0.8rem, 2vw, 1.2rem);
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-weight: 700;
}

.heading-label, .gauge-label {
    font-size: 0.75em;
    opacity: 0.8;
    margin-bottom: 4px;
}

.heading-value {
    font-size: 1.2em;
    color: var(--color-amber);
    text-shadow: 0 0 10px var(--color-amber);
}

.gauge-bar {
    width: 80px;
    height: 6px;
    border: 1px solid var(--color-green);
    position: relative;
    background-color: rgba(48, 212, 96, 0.1);
}

.gauge-fill {
    height: 100%;
    background-color: var(--color-green);
    width: 75%;
    box-shadow: 0 0 8px var(--color-green);
}

.hud-title {
    font-family: var(--font-heading);
    font-size: clamp(1.2rem, 3vw, 2rem);
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-amber);
    text-shadow: 0 0 20px var(--color-amber);
}

/* HUD CREW STATUS */
.hud-crew-status {
    position: absolute;
    top: 40px;
    left: 40px;
    display: flex;
    flex-direction: column;
    gap: 12px;
    font-family: var(--font-heading);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    z-index: 15;
}

.crew-item {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--color-pale-gold);
}

.crew-indicator {
    width: 8px;
    height: 8px;
    background-color: var(--color-green);
    border-radius: 50%;
    box-shadow: 0 0 6px var(--color-green);
}

/* PLANET VIEWPORT */
.planet-viewport {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 200px;
    height: 200px;
    border: 2px dashed var(--color-amber);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 12;
}

.planet {
    width: 150px;
    height: 150px;
    background: radial-gradient(circle at 35% 35%, var(--color-copper), var(--color-gold), var(--color-copper));
    border-radius: 50%;
    box-shadow: 0 0 40px var(--color-copper), inset -20px -20px 30px rgba(0, 0, 0, 0.5);
    animation: planet-glow 3s ease-in-out infinite;
}

@keyframes planet-glow {
    0%, 100% {
        box-shadow: 0 0 40px var(--color-copper), inset -20px -20px 30px rgba(0, 0, 0, 0.5);
    }
    50% {
        box-shadow: 0 0 60px var(--color-copper), inset -20px -20px 30px rgba(0, 0, 0, 0.5);
    }
}

/* CONTENT CONTAINER */
.content-container {
    position: relative;
    z-index: 5;
    max-width: 1200px;
    margin: 0 auto;
    padding: 160px 40px 80px;
    background: linear-gradient(180deg, rgba(6, 6, 8, 0.4) 0%, rgba(6, 6, 8, 0.8) 100%);
}

section {
    margin-bottom: 80px;
    padding: 40px;
    background-color: rgba(42, 42, 48, 0.6);
    border: 1px solid var(--color-amber);
    border-radius: 2px;
}

.section-title {
    font-family: var(--font-heading);
    font-size: clamp(1.2rem, 2.5vw, 1.8rem);
    font-weight: 700;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--color-green);
    margin-bottom: 30px;
    text-shadow: 0 0 10px var(--color-green);
}

/* MISSION BRIEFING */
.mission-briefing {
    border-left: 4px solid var(--color-amber);
}

.briefing-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.mission-text {
    font-family: var(--font-mono);
    font-size: 0.875rem;
    line-height: 1.6;
    color: var(--color-pale-gold);
    letter-spacing: 0.02em;
}

/* DOSSIER */
.crew-profiles {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
}

.crew-card {
    padding: 20px;
    background-color: rgba(20, 22, 24, 0.8);
    border: 1px solid var(--color-copper);
    border-radius: 0;
}

.crew-designation {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-copper);
    margin-bottom: 12px;
    text-shadow: 0 0 8px var(--color-copper);
}

.crew-data {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--color-green);
    margin-bottom: 8px;
}

.crew-description {
    font-family: var(--font-sans);
    font-size: 0.9rem;
    line-height: 1.5;
    color: var(--color-pale-gold);
    margin-top: 12px;
    font-style: italic;
}

/* QUEST DECISIONS */
.quest-decisions {
    border-left: 4px solid var(--color-green);
}

.decisions-container {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 30px;
}

.decision-card {
    padding: 25px;
    background-color: rgba(20, 22, 24, 0.9);
    border: 2px solid var(--color-amber);
    border-radius: 0;
    transition: all 0.3s ease;
    cursor: pointer;
}

.decision-card:hover {
    background-color: rgba(42, 42, 48, 0.9);
    border-color: var(--color-green);
    box-shadow: 0 0 20px rgba(48, 212, 96, 0.3);
}

.decision-title {
    font-family: var(--font-heading);
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-gold);
    margin-bottom: 12px;
}

.decision-meta {
    display: flex;
    gap: 12px;
    margin-bottom: 15px;
}

.difficulty-badge, .distance-badge {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 4px 8px;
    background-color: rgba(48, 212, 96, 0.2);
    border: 1px solid var(--color-green);
    color: var(--color-green);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.decision-description {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    line-height: 1.6;
    color: var(--color-pale-gold);
    margin-bottom: 20px;
}

.decision-stats {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
    padding: 15px;
    background-color: rgba(48, 212, 96, 0.1);
    border-left: 2px solid var(--color-green);
}

.stat {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--color-green);
    letter-spacing: 0.05em;
}

.quest-button {
    width: 100%;
    padding: 12px;
    background-color: var(--color-amber);
    color: var(--color-near-black);
    border: none;
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(212, 160, 48, 0.3);
}

.quest-button:hover {
    background-color: var(--color-gold);
    box-shadow: 0 6px 20px rgba(232, 176, 48, 0.5);
    transform: translateY(-2px);
}

.quest-button:active {
    transform: translateY(0);
}

/* QUANTUM OVERLAY */
.quantum-states {
    border-left: 4px solid var(--color-copper);
}

.states-grid {
    display: flex;
    flex-direction: column;
    gap: 25px;
}

.quantum-state {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.state-label {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-copper);
    text-shadow: 0 0 8px var(--color-copper);
}

.state-bar {
    height: 12px;
    background-color: rgba(212, 160, 48, 0.2);
    border: 1px solid var(--color-copper);
    position: relative;
    overflow: hidden;
}

.state-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--color-copper), var(--color-amber));
    transition: width 0.5s ease;
    box-shadow: inset 0 0 10px rgba(212, 160, 48, 0.5);
}

/* FOOTER */
.hud-footer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(180deg, rgba(20, 22, 24, 0.3) 0%, rgba(20, 22, 24, 0.8) 100%);
    border-top: 2px solid var(--color-amber);
    padding: 15px 40px;
    z-index: 15;
    display: flex;
    justify-content: center;
}

.footer-message {
    font-family: var(--font-heading);
    font-size: 0.85rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--color-green);
    text-shadow: 0 0 10px var(--color-green);
}

/* SCROLL-BASED PLANET GROWTH */
@media (prefers-reduced-motion: no-preference) {
    .decision-card {
        animation: subtle-glow 3s ease-in-out infinite;
    }
}

@keyframes subtle-glow {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.95;
    }
}

/* COLOR PALETTE USAGE */
.color-bright-green { color: #40e870; }
.color-red { color: #d43030; }

/* RESPONSIVE */
@media (max-width: 768px) {
    .hud-header {
        flex-direction: column;
        gap: 15px;
        height: auto;
        padding: 15px 20px;
    }

    .hud-title {
        font-size: 1.2rem;
    }

    .content-container {
        padding: 120px 20px 80px;
    }

    section {
        padding: 25px;
        margin-bottom: 60px;
    }

    .decisions-container, .crew-profiles {
        grid-template-columns: 1fr;
    }

    .hud-crew-status {
        flex-direction: row;
        left: 50%;
        transform: translateX(-50%);
    }
}