:root {
    --bg-primary: #050814;
    --bg-secondary: #0b112c;
    --bg-card: rgba(11, 17, 44, 0.9);
    --accent-cyan: #00f0ff;
    --accent-purple: #7000ff;
    --accent-blue: #0077ff;
    --accent-gold: #ffb703;
    --accent-red: #ff0055;
    --text-white: #ffffff;
    --text-muted: #a5b4fc;
    --font-main: 'Rajdhani', 'Nunito', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
}

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

body {
    background: radial-gradient(circle at 50% 20%, #101c4e 0%, #050814 80%, #010208 100%);
    color: var(--text-white);
    font-family: var(--font-main);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    user-select: none;
}

#pulsar-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1;
}

.teens-header {
    position: relative;
    z-index: 10;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 2rem;
    background: rgba(5, 8, 20, 0.85);
    backdrop-filter: blur(12px);
    border-bottom: 2px solid rgba(0, 240, 255, 0.3);
    flex-wrap: wrap;
    gap: 1rem;
}

.brand-box {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.brand-icon {
    font-size: 2.4rem;
    filter: drop-shadow(0 0 15px var(--accent-cyan));
}

.brand-text h1 {
    font-size: 1.5rem;
    font-weight: 800;
    letter-spacing: 1.5px;
    color: var(--accent-cyan);
    text-transform: uppercase;
}

.brand-text .sub {
    font-size: 0.85rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    flex-wrap: wrap;
}

.age-selector-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(0, 240, 255, 0.08);
    border: 1px solid rgba(0, 240, 255, 0.3);
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
}

.age-selector-group label {
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--accent-cyan);
}

.age-select {
    background: #0b112c;
    color: #fff;
    border: 1px solid var(--accent-cyan);
    border-radius: 12px;
    padding: 0.3rem 0.6rem;
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    outline: none;
    font-family: var(--font-mono);
}

.btn-ctrl {
    background: linear-gradient(135deg, #7000ff, #0077ff);
    color: #fff;
    border: none;
    padding: 0.45rem 1rem;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 700;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(0, 119, 255, 0.3);
    transition: all 0.2s ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.btn-ctrl:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 240, 255, 0.5);
}

.btn-lang {
    background: linear-gradient(135deg, #00f0ff, #0077ff);
    color: #050814;
    font-weight: 800;
}

.progress-container {
    position: relative;
    z-index: 10;
    background: rgba(11, 17, 44, 0.6);
    padding: 0.8rem 1.5rem;
    display: flex;
    justify-content: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.step-tracker {
    display: flex;
    align-items: center;
    gap: 1.5rem;
    max-width: 850px;
    width: 100%;
    justify-content: space-around;
}

.step-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--text-muted);
    opacity: 0.5;
    transition: all 0.3s;
}

.step-item.active {
    opacity: 1;
    color: var(--accent-cyan);
    transform: scale(1.08);
}

.step-item.completed {
    opacity: 0.9;
    color: var(--accent-gold);
}

.step-circle {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    border: 2px solid currentColor;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
}

main {
    position: relative;
    z-index: 5;
    max-width: 980px;
    margin: 2rem auto 3rem;
    padding: 0 1rem;
}

.screen-card {
    background: var(--bg-card);
    border-radius: 20px;
    border: 2px solid rgba(0, 240, 255, 0.35);
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.7), 0 0 35px rgba(0, 240, 255, 0.2);
    padding: 2.2rem;
    position: relative;
    backdrop-filter: blur(10px);
}

.landing-content {
    text-align: center;
}

.hero-telescope {
    font-size: 5rem;
    margin-bottom: 1rem;
    display: inline-block;
    filter: drop-shadow(0 0 25px rgba(0, 240, 255, 0.7));
    cursor: pointer;
    transition: transform 0.3s;
}

.hero-telescope:hover {
    transform: scale(1.12) rotate(6deg);
}

.landing-title {
    font-size: 2.4rem;
    font-weight: 900;
    color: var(--accent-cyan);
    letter-spacing: 1px;
    text-shadow: 0 0 20px rgba(0, 240, 255, 0.5);
    margin-bottom: 0.8rem;
}

.landing-desc {
    font-size: 1.15rem;
    line-height: 1.6;
    color: var(--text-muted);
    max-width: 750px;
    margin: 0 auto 1.5rem;
}

.easter-egg-box {
    background: rgba(5, 8, 20, 0.7);
    border-radius: 16px;
    padding: 1.5rem;
    margin: 1.5rem auto;
    border: 1px dashed var(--accent-purple);
    max-width: 550px;
}

.satellite-nodes {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    margin: 1rem 0;
}

.sat-btn {
    font-size: 2.5rem;
    background: transparent;
    border: none;
    cursor: pointer;
    filter: grayscale(100%) opacity(0.4);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.sat-btn.locked {
    filter: grayscale(0%) opacity(1) drop-shadow(0 0 15px var(--accent-cyan));
    transform: scale(1.3) rotate(20deg);
}

.btn-big-play {
    background: linear-gradient(135deg, #00f0ff, #7000ff);
    color: #fff;
    font-size: 1.25rem;
    font-weight: 800;
    padding: 1rem 2.5rem;
    border-radius: 35px;
    border: none;
    cursor: pointer;
    box-shadow: 0 8px 25px rgba(0, 240, 255, 0.4);
    margin-top: 1.2rem;
    transition: all 0.25s;
    display: inline-flex;
    align-items: center;
    gap: 0.8rem;
    letter-spacing: 0.5px;
}

.btn-big-play:hover {
    transform: scale(1.05);
    box-shadow: 0 12px 35px rgba(0, 240, 255, 0.6);
}

.room-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.2rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.15);
    padding-bottom: 0.8rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.room-title {
    font-size: 1.45rem;
    color: var(--accent-cyan);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    letter-spacing: 0.5px;
}

.room-instructions {
    font-size: 1.05rem;
    color: var(--text-muted);
    background: rgba(5, 8, 20, 0.6);
    padding: 1rem 1.2rem;
    border-radius: 12px;
    margin-bottom: 1.8rem;
    border-left: 4px solid var(--accent-cyan);
    line-height: 1.5;
}

/* PUZZLES ROOM 1: RADIOTELESCOPES */
.dishes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1.2rem;
    margin: 2rem 0;
}

.dish-card {
    background: rgba(5, 8, 20, 0.8);
    border: 2px solid rgba(0, 240, 255, 0.25);
    border-radius: 16px;
    padding: 1.2rem;
    text-align: center;
    transition: all 0.25s;
}

.dish-card.aligned {
    border-color: var(--accent-cyan);
    background: rgba(0, 240, 255, 0.15);
    box-shadow: 0 0 25px rgba(0, 240, 255, 0.4);
}

.dish-slider {
    width: 100%;
    margin: 1rem 0;
    cursor: pointer;
}

/* PUZZLES ROOM 2: FREQUENCY TUNER */
.frequency-tuner-box {
    background: rgba(5, 8, 20, 0.85);
    border: 2px solid var(--accent-purple);
    border-radius: 18px;
    padding: 1.8rem;
    text-align: center;
    max-width: 600px;
    margin: 2rem auto;
}

.freq-display {
    font-family: var(--font-mono);
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--accent-cyan);
    margin: 1rem 0;
    letter-spacing: 2px;
    text-shadow: 0 0 15px var(--accent-cyan);
}

.freq-buttons-row {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-top: 1rem;
}

/* PUZZLES ROOM 3: STAR CHART */
.star-map-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    max-width: 600px;
    margin: 2rem auto;
}

.star-node {
    height: 100px;
    background: rgba(5, 8, 20, 0.8);
    border: 2px dashed rgba(255, 255, 255, 0.3);
    border-radius: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.25s;
}

.star-node.targeted {
    border-style: solid;
    border-color: var(--accent-gold);
    background: rgba(255, 183, 3, 0.2);
    box-shadow: 0 0 25px var(--accent-gold);
}

/* MODAL & MASCOT */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(2, 4, 10, 0.88);
    backdrop-filter: blur(8px);
    z-index: 100;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal-box {
    background: #0b112c;
    border: 2px solid var(--accent-cyan);
    border-radius: 20px;
    max-width: 520px;
    width: 100%;
    padding: 2.2rem;
    text-align: center;
    box-shadow: 0 20px 45px rgba(0, 0, 0, 0.8), 0 0 30px rgba(0, 240, 255, 0.3);
}

.modal-avatar {
    font-size: 3.8rem;
    margin-bottom: 0.8rem;
}

.modal-title {
    font-size: 1.6rem;
    color: var(--accent-cyan);
    margin-bottom: 0.6rem;
}

.modal-body {
    font-size: 1.05rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.btn-close-modal {
    background: linear-gradient(135deg, #00f0ff, #7000ff);
    color: #fff;
    font-weight: 800;
    border: none;
    padding: 0.7rem 1.8rem;
    border-radius: 25px;
    cursor: pointer;
    font-size: 1rem;
}

.victory-card {
    text-align: center;
    padding: 2.5rem 1.5rem;
}

.diploma-frame {
    background: #090e24;
    color: #fff;
    border: 4px solid var(--accent-cyan);
    border-radius: 20px;
    padding: 2rem;
    max-width: 700px;
    margin: 1.5rem auto;
    box-shadow: 0 10px 40px rgba(0, 240, 255, 0.3);
}

.diploma-title {
    font-size: 1.8rem;
    font-weight: 900;
    color: var(--accent-cyan);
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.diploma-recipient {
    font-size: 1.6rem;
    font-weight: 900;
    color: var(--accent-gold);
    border-bottom: 2px dashed var(--accent-cyan);
    display: inline-block;
    padding: 0.2rem 1.5rem;
    margin: 0.8rem 0;
}

/* ============================================================
   TEENS SCI-FI ENHANCEMENTS: HUD, OSCILLOSCOPE, MATRIX, TOAST
   ============================================================ */

.treasures-badge {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    background: rgba(255, 183, 3, 0.12);
    border: 1px solid rgba(255, 183, 3, 0.45);
    padding: 0.35rem 0.85rem;
    border-radius: 20px;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--accent-gold);
}

.treasures-badge span {
    font-size: 1.1rem;
}

.secret-collectible {
    cursor: pointer;
    display: inline-block;
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), filter 0.3s;
    user-select: none;
}

.secret-collectible:hover {
    transform: scale(1.3) rotate(8deg);
    filter: drop-shadow(0 0 10px var(--accent-gold));
}

.secret-collectible.found {
    opacity: 0.4;
    cursor: default;
    filter: grayscale(1);
    transform: none;
}

/* Oscilloscope Canvas */
.oscilloscope-box {
    background: #020510;
    border: 2px solid var(--accent-cyan);
    border-radius: 12px;
    padding: 1rem;
    margin: 1.2rem auto;
    max-width: 650px;
    box-shadow: 0 0 20px rgba(0, 240, 255, 0.25) inset;
    text-align: center;
}

.oscilloscope-canvas {
    width: 100%;
    height: 120px;
    background: #01030a;
    border-radius: 8px;
    display: block;
}

.interfero-meter {
    margin-top: 0.6rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--accent-cyan);
}

.interfero-bar {
    flex: 1;
    height: 10px;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 5px;
    margin: 0 1rem;
    overflow: hidden;
    border: 1px solid rgba(0, 240, 255, 0.3);
}

.interfero-fill {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, #ff0055, #ffb703, #00f0ff);
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Signal Matrix & Binary Raster */
.signal-raster-grid {
    display: grid;
    grid-template-columns: repeat(5, 42px);
    gap: 8px;
    justify-content: center;
    margin: 1.2rem auto;
    background: rgba(0, 0, 0, 0.4);
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid rgba(0, 240, 255, 0.3);
    width: fit-content;
}

.raster-cell {
    width: 42px;
    height: 42px;
    border-radius: 6px;
    background: #0b112c;
    border: 1px solid rgba(0, 240, 255, 0.3);
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 700;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.2s ease;
}

.raster-cell.active {
    background: var(--accent-cyan);
    color: #050814;
    box-shadow: 0 0 12px var(--accent-cyan);
    border-color: #fff;
}

.raster-cell.locked {
    cursor: default;
    opacity: 0.9;
}

/* Astrometric Reticle & Star Compass */
.celestial-compass-box {
    position: relative;
    max-width: 580px;
    height: 380px;
    margin: 1.5rem auto;
    background: radial-gradient(circle at center, #0f183d 0%, #050814 85%);
    border: 2px solid rgba(0, 240, 255, 0.4);
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.7);
}

.constellation-svg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.celestial-target-dot {
    position: absolute;
    width: 44px;
    height: 44px;
    transform: translate(-50%, -50%);
    border-radius: 50%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    background: rgba(11, 17, 44, 0.75);
    border: 2px solid rgba(0, 240, 255, 0.5);
    transition: all 0.25s ease;
}

.celestial-target-dot:hover {
    transform: translate(-50%, -50%) scale(1.15);
    border-color: var(--accent-cyan);
    box-shadow: 0 0 16px var(--accent-cyan);
}

.celestial-target-dot.targeted {
    background: rgba(0, 240, 255, 0.3);
    border-color: var(--accent-gold);
    box-shadow: 0 0 20px var(--accent-gold);
}

.celestial-target-dot .star-label {
    position: absolute;
    bottom: -20px;
    white-space: nowrap;
    font-size: 0.75rem;
    font-family: var(--font-mono);
    color: var(--text-muted);
    font-weight: 700;
}

/* Toast Notification (Zéro alert) */
.toast-msg {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: rgba(11, 17, 44, 0.95);
    color: #fff;
    padding: 0.85rem 1.8rem;
    border-radius: 30px;
    border: 1px solid var(--accent-cyan);
    font-family: var(--font-main);
    font-weight: 700;
    font-size: 1rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.6), 0 0 20px rgba(0, 240, 255, 0.35);
    z-index: 1000;
    opacity: 0;
    pointer-events: none;
    transition: transform 0.35s cubic-bezier(0.18, 0.89, 0.32, 1.28), opacity 0.3s;
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.toast-msg.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.shake-element {
    animation: shakeAnim 0.45s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}

@keyframes shakeAnim {
    10%, 90% { transform: translate3d(-2px, 0, 0); }
    20%, 80% { transform: translate3d(3px, 0, 0); }
    30%, 50%, 70% { transform: translate3d(-4px, 0, 0); }
    40%, 60% { transform: translate3d(4px, 0, 0); }
}

/* Clue & Hint Drawer */
.hint-container {
    margin: 1.5rem auto 0.5rem;
    text-align: center;
}

.btn-hint {
    background: rgba(255, 183, 3, 0.12);
    border: 1px solid rgba(255, 183, 3, 0.5);
    color: var(--accent-gold);
    padding: 0.5rem 1.2rem;
    border-radius: 20px;
    font-family: var(--font-main);
    font-size: 0.95rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}

.btn-hint:hover {
    background: rgba(255, 183, 3, 0.25);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(255, 183, 3, 0.3);
}

.hint-box {
    margin-top: 0.8rem;
    padding: 0.9rem 1.4rem;
    background: rgba(255, 183, 3, 0.08);
    border: 1px dashed rgba(255, 183, 3, 0.4);
    border-radius: 12px;
    color: #fef08a;
    font-size: 0.95rem;
    line-height: 1.5;
    max-width: 620px;
    margin-left: auto;
    margin-right: auto;
    animation: fadeIn 0.3s ease;
}

.hint-level-tag {
    font-weight: 800;
    font-family: var(--font-mono);
    text-transform: uppercase;
    font-size: 0.8rem;
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 6px;
    background: rgba(255, 183, 3, 0.25);
    margin-right: 0.5rem;
}