/* ==========================================================================
   QUANTUM CIPHER / BẺ KHÓA BOM LƯỢNG TỬ (BRIEFCASE UI)
   ========================================================================== */
.quantum-game-overlay {
    background: #04070d;
}

.quantum-topbar {
    background: rgba(13, 20, 32, 0.94);
    border-bottom: 1px solid rgba(0, 240, 255, 0.4);
    box-shadow: 0 4px 20px rgba(0, 240, 255, 0.15);
}

.quantum-badge {
    background: rgba(0, 240, 255, 0.15);
    border: 1px solid #00f0ff;
    color: #00f0ff;
    text-shadow: 0 0 10px rgba(0, 240, 255, 0.6);
}

.quantum-topbar .mode-tag {
    font-size: 0.68rem;
    background: rgba(239, 68, 68, 0.25);
    border: 1px solid #ef4444;
    color: #ef4444;
    padding: 2px 8px;
    border-radius: 4px;
    font-weight: 800;
    letter-spacing: 1.5px;
    animation: pulse-red 1.2s infinite;
}

.quantum-mode-selector {
    display: flex;
    align-items: center;
    background: #070b13;
    border: 1px solid rgba(56, 189, 248, 0.4);
    border-radius: 6px;
    padding: 2px;
    gap: 2px;
}

.quantum-mode-selector .mode-lbl {
    font-size: 0.68rem;
    color: #94a3b8;
    padding: 0 4px;
    font-weight: 700;
}

.quantum-mode-selector .btn-mode {
    background: transparent;
    border: none;
    color: #7dd3fc;
    padding: 4px 9px;
    border-radius: 4px;
    font-family: 'Orbitron', sans-serif;
    font-size: 0.70rem;
    font-weight: 800;
    cursor: pointer;
    transition: all 0.2s;
}

.quantum-mode-selector .btn-mode:hover { color: #fff; }
.quantum-mode-selector .btn-mode.active {
    background: #00f0ff;
    color: #020617;
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.6);
}

.quantum-body {
    padding: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

/* MAIN BRIEFCASE WORKSPACE (1024x573 aspect ratio) */
.stage-box {
    position: relative;
    width: 100%;
    max-width: 1380px;
    aspect-ratio: 1024 / 573;
    background: #020408;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 25px 70px rgba(0, 0, 0, 0.9), 0 0 45px rgba(0, 240, 255, 0.2);
    border: 2px solid rgba(0, 240, 255, 0.4);
}

.briefcase-bg {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    pointer-events: none;
    z-index: 1;
}

.interactive-layer {
    position: absolute;
    inset: 0;
    z-index: 10;
}

/* ====================================================
   LEFT DOOR: TACTICAL PHONE HUD
   ==================================================== */
.phone-dock-left {
    position: absolute;
    left: 2.93%;
    top: 7.85%;
    width: 21.0%;
    height: 83.77%;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 6px;
    z-index: 15;
}

.phone-casing {
    position: relative;
    width: 100%;
    height: 100%;
    background: linear-gradient(180deg, #16202e 0%, #0d1520 100%);
    border: 2px solid #2d3e52;
    border-radius: 16px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.85), 0 0 15px rgba(0, 240, 255, 0.2), inset 0 1px 2px rgba(255, 255, 255, 0.15);
    display: flex;
    flex-direction: column;
    padding: 8px 6px;
    overflow: hidden;
}

.phone-screen {
    position: relative;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 50% 30%, #07192e 0%, #030a14 100%);
    border: 1.5px solid rgba(0, 240, 255, 0.55);
    border-radius: 10px;
    display: flex;
    flex-direction: column;
    padding: 8px 8px;
    overflow: hidden;
    box-shadow: inset 0 0 25px rgba(0, 240, 255, 0.2);
}

.phone-screen::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(rgba(0, 240, 255, 0.04) 50%, rgba(0, 0, 0, 0.3) 50%);
    background-size: 100% 3px;
    pointer-events: none;
    z-index: 5;
}

.screen-topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid rgba(56, 189, 248, 0.35);
    padding-bottom: 4px;
    margin-bottom: 6px;
    z-index: 10;
}
.screen-title {
    font-family: 'Orbitron', monospace;
    font-size: clamp(7.5px, 0.72vw, 10.5px);
    color: #38bdf8;
    font-weight: 800;
    display: flex;
    align-items: center;
    gap: 4px;
    letter-spacing: 0.5px;
    text-shadow: 0 0 6px rgba(56, 189, 248, 0.8);
}
.screen-title .dot {
    width: 5px;
    height: 5px;
    border-radius: 50%;
    background: #00f0ff;
    box-shadow: 0 0 5px #00f0ff;
    animation: pulse-cyan 1s infinite alternate;
}
@keyframes pulse-cyan { 0% { opacity: 0.4; } 100% { opacity: 1; } }

.screen-stat {
    font-family: 'Share Tech Mono', monospace;
    font-size: clamp(6.5px, 0.6vw, 9px);
    color: #94a3b8;
}

/* Meaning Box */
.clue-viet-box {
    background: rgba(14, 165, 233, 0.12);
    border-left: 2.5px solid #00f0ff;
    border-radius: 4px;
    padding: 6px 8px;
    margin-bottom: 6px;
    z-index: 10;
}
.clue-viet-label {
    font-size: clamp(6.5px, 0.62vw, 8.5px);
    color: #7dd3fc;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 2px;
}
.clue-viet-text {
    font-size: clamp(10px, 0.88vw, 13px);
    font-weight: 700;
    color: #f0fdf4;
    line-height: 1.3;
    text-shadow: 0 0 8px rgba(255, 255, 255, 0.35);
}

/* Sentence Box */
.clue-sentence-box {
    background: rgba(2, 6, 23, 0.65);
    border: 1px dashed rgba(56, 189, 248, 0.4);
    border-radius: 4px;
    padding: 6px 8px;
    margin-bottom: 6px;
    z-index: 10;
}
.clue-sentence-label {
    font-size: clamp(6.5px, 0.62vw, 8.5px);
    color: #94a3b8;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 2px;
}
.clue-sentence-text {
    font-family: 'Share Tech Mono', monospace;
    font-size: clamp(8px, 0.75vw, 11px);
    color: #cbd5e1;
    line-height: 1.35;
}
.clue-sentence-text ::deep .blank-target {
    color: #facc15;
    font-weight: 800;
    text-shadow: 0 0 8px rgba(250, 204, 21, 0.6);
    border-bottom: 1.5px solid #facc15;
    padding: 0 2px;
}
.sent-vi-trans {
    font-size: clamp(7.5px, 0.7vw, 10px);
    color: #94a3b8;
    margin-top: 4px;
    padding-top: 4px;
    border-top: 1px dashed rgba(56, 189, 248, 0.25);
}

/* Action Buttons inside Phone Screen */
.phone-tools {
    margin-top: auto;
    display: flex;
    flex-direction: column;
    gap: 4px;
    z-index: 10;
}
.btn-screen-act {
    background: rgba(14, 165, 233, 0.18);
    border: 1px solid rgba(56, 189, 248, 0.45);
    color: #bae6fd;
    padding: 5px 8px;
    border-radius: 4px;
    font-family: 'Orbitron', sans-serif;
    font-size: clamp(7px, 0.68vw, 9.5px);
    font-weight: 700;
    cursor: pointer;
    transition: all 0.15s ease;
    display: flex;
    align-items: center;
    justify-content: space-between;
}
.btn-screen-act:hover {
    background: #00f0ff;
    color: #020617;
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.6);
    transform: translateY(-1px);
}
.btn-screen-act.btn-hint-first {
    border-color: rgba(250, 204, 21, 0.6);
    color: #fef08a;
    background: rgba(234, 179, 8, 0.18);
}
.btn-screen-act.btn-hint-first:hover {
    background: #facc15;
    color: #000;
    box-shadow: 0 0 12px rgba(250, 204, 21, 0.6);
}

/* ====================================================
   CENTER: TIMER + PLASMA CORE + 2-ROW TILES
   ==================================================== */
.center-hud-timer {
    position: absolute;
    left: 28.5%;
    top: 13.8%;
    width: 12.2%;
    height: 14.5%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transform: rotate(-13.5deg) skewX(-5deg);
    pointer-events: none;
    transition: all 0.2s;
    z-index: 15;
}
.center-hud-timer .timer-val {
    font-family: 'Orbitron', monospace;
    font-size: clamp(18px, 2.2vw, 38px);
    font-weight: 900;
    color: #ff2233;
    text-shadow: 0 0 12px rgba(255, 34, 51, 0.95), 0 0 26px rgba(255, 34, 51, 0.6);
    letter-spacing: 3px;
}
.center-hud-timer.urgent-30 .timer-val {
    color: #ff3344;
    animation: pulse-warn 0.8s infinite alternate;
}
.center-hud-timer.urgent-20 .timer-val {
    color: #ff1133;
    animation: pulse-fast 0.45s infinite alternate;
}
.center-hud-timer.urgent-10 .timer-val {
    color: #ff0011;
    animation: pulse-critical 0.22s infinite alternate;
    text-shadow: 0 0 16px #ff0000, 0 0 35px #ff0055;
}

/* Plasma Reactor Core Spark Emitter */
.plasma-reactor-spark {
    position: absolute;
    left: 38.57%;
    top: 27.05%;
    width: 22.95%;
    height: 15.71%;
    pointer-events: none;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 12;
}
.plasma-reactor-spark img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 0 12px #00f0ff);
    opacity: 0.92;
    animation: pulse-core 0.8s infinite alternate;
}

/* 2-ROW CIPHER TILES ON CENTER BRUSHED TITANIUM PLATES */
.plate-row1-lock {
    position: absolute;
    left: 28.32%;
    top: 58.46%;
    width: 42.97%;
    height: 12.22%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(3px, 0.55vw, 9px);
    padding: 2px 10px;
    z-index: 15;
}

.plate-row2-input {
    position: absolute;
    left: 28.32%;
    top: 71.55%;
    width: 42.97%;
    height: 19.20%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(3px, 0.55vw, 9px);
    padding: 4px 10px;
    z-index: 15;
}

.row-deck-badge {
    position: absolute;
    left: 10px;
    font-family: 'Orbitron', monospace;
    font-size: clamp(7.5px, 0.7vw, 10.5px);
    font-weight: 900;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 5px;
}
.row-deck-badge.badge-lock {
    color: #22c55e;
    text-shadow: 0 0 8px rgba(34, 197, 94, 0.7);
}
.row-deck-badge.badge-input {
    color: #00f0ff;
    text-shadow: 0 0 8px rgba(0, 240, 255, 0.6);
}
.row-deck-badge .led-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
}
.badge-lock .led-dot { background: #22c55e; box-shadow: 0 0 6px #22c55e; }
.badge-input .led-dot { background: #00f0ff; box-shadow: 0 0 6px #00f0ff; }

/* Outer Socket: Dark Recessed Metal */
.tile-socket {
    background: #0d131c;
    padding: clamp(1.5px, 0.25vw, 3px);
    border-radius: 6px;
    box-shadow: inset 0 2px 5px rgba(0, 0, 0, 0.9), 0 1px 1px rgba(255, 255, 255, 0.15);
    border: 1px solid #1e2838;
    display: flex;
    align-items: center;
    justify-content: center;
    flex: 0 1 auto;
}

/* 3D Keycap */
.tile-button {
    width: clamp(24px, 3.2vw, 44px);
    height: clamp(24px, 3.2vw, 44px);
    background: linear-gradient(180deg, #2a3545 0%, #151d28 100%);
    border: 1.5px solid #3d4c60;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: 'Orbitron', monospace;
    font-size: clamp(13px, 1.7vw, 24px);
    font-weight: 900;
    color: #475569;
    box-shadow: 0 3px 5px rgba(0, 0, 0, 0.65), inset 0 1px 1px rgba(255, 255, 255, 0.25);
    transition: all 0.2s cubic-bezier(0.34, 1.56, 0.64, 1);
    position: relative;
}

.tile-button.locked-green {
    background: linear-gradient(180deg, #15803d 0%, #166534 100%) !important;
    border-color: #4ade80 !important;
    color: #ffffff !important;
    box-shadow: 0 0 16px rgba(34, 197, 94, 0.9), inset 0 1px 2px rgba(255, 255, 255, 0.6) !important;
    text-shadow: 0 0 8px #ffffff, 0 0 16px #22c55e !important;
    animation: snap-lock 0.35s ease;
}

.tile-button.has-char {
    color: #00f0ff;
    border-color: #00f0ff;
    text-shadow: 0 0 10px #00f0ff, 0 0 20px rgba(0, 240, 255, 0.6);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.7), 0 0 10px rgba(0, 240, 255, 0.6);
    transform: translateY(-2px);
}
.tile-button.cursor-active {
    border-color: #facc15;
    box-shadow: 0 0 12px rgba(250, 204, 21, 0.6);
    animation: cursor-pulse 0.8s infinite alternate;
}

/* ====================================================
   RIGHT DOOR: 6 SLIM PIN & KEYBOARD
   ==================================================== */
.right-door-pin-tray {
    position: absolute;
    left: 77.15%;
    top: 14.66%;
    width: 16.02%;
    height: 12.91%;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4px;
    padding: 4px 5px;
    z-index: 15;
}

.power-rod {
    flex: 1;
    height: 82%;
    background: linear-gradient(180deg, #86efac 0%, #22c55e 50%, #15803d 100%);
    border-radius: 5px;
    box-shadow: 0 0 12px rgba(34, 197, 94, 0.8), inset 0 0 4px rgba(255, 255, 255, 0.6);
    transition: all 0.3s ease;
    position: relative;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.power-rod::after {
    content: '';
    position: absolute;
    inset: 1.5px;
    background: linear-gradient(90deg, rgba(255,255,255,0.6) 0%, transparent 60%);
    border-radius: 3px;
    pointer-events: none;
}

.rod-bolt {
    position: absolute;
    font-size: clamp(9px, 0.95vw, 14px);
    color: #ffffff;
    text-shadow: 0 0 6px #ffffff, 0 0 12px #22c55e;
    font-weight: 900;
    z-index: 5;
    transition: all 0.3s;
    pointer-events: none;
    line-height: 1;
    animation: pulse-bolt 1.2s infinite alternate;
}

.power-rod.blown {
    background: #141b26 !important;
    box-shadow: none !important;
    border: 1px solid #283548;
    opacity: 0.32;
}
.power-rod.blown::after { display: none; }
.power-rod.blown .rod-bolt {
    color: #475569 !important;
    text-shadow: none !important;
    opacity: 0.3;
    animation: none;
}

.spark-rod-burst {
    position: absolute;
    width: 80px;
    height: 80px;
    pointer-events: none;
    z-index: 100;
    transform: translate(-50%, -50%);
    display: none;
}
.spark-rod-burst img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 0 16px #00f0ff);
}

/* Virtual Mechanical Keyboard */
.right-door-keyboard {
    position: absolute;
    left: 76.5%;
    top: 47.5%;
    width: 17.5%;
    height: 41.0%;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 4px;
    padding: 6px 4px;
    background: rgba(8, 14, 22, 0.88);
    border: 1px solid rgba(45, 65, 88, 0.7);
    border-radius: 8px;
    box-shadow: inset 0 2px 10px rgba(0, 0, 0, 0.75), 0 4px 15px rgba(0, 0, 0, 0.5);
    z-index: 15;
}
.kb-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2px;
    width: 100%;
    flex: 1;
    min-height: 0;
}
.kb-key {
    flex: 1;
    height: 100%;
    background: linear-gradient(180deg, #1e2837 0%, #111722 100%);
    border: 1px solid rgba(71, 85, 105, 0.5);
    border-radius: 3px;
    color: #cbd5e1;
    font-family: 'Share Tech Mono', monospace;
    font-size: clamp(8.5px, 0.9vw, 13px);
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.12s ease;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.8);
    padding: 0;
}
.kb-key:hover {
    background: #27354a;
    border-color: #00f0ff;
    color: #00f0ff;
    box-shadow: 0 0 8px rgba(0, 240, 255, 0.4);
    transform: translateY(-1px);
}
.kb-key:active { transform: translateY(1px); }
.kb-key.action-key {
    flex: 1.5;
    font-family: 'Orbitron', sans-serif;
    font-size: clamp(7px, 0.7vw, 10px);
    background: linear-gradient(180deg, #243347 0%, #141f2d 100%);
}
.kb-key.action-key.enter-key {
    border-color: rgba(34, 197, 94, 0.5);
    color: #86efac;
    background: linear-gradient(180deg, #14532d 0%, #0f351f 100%);
}
.kb-key.action-key.enter-key:hover {
    background: #15803d;
    color: #fff;
    border-color: #22c55e;
    box-shadow: 0 0 10px rgba(34, 197, 94, 0.6);
}
.kb-key.action-key.del-key {
    border-color: rgba(239, 68, 68, 0.5);
    color: #fca5a5;
    background: linear-gradient(180deg, #7f1d1d 0%, #450a0a 100%);
}
.kb-key.action-key.del-key:hover {
    background: #b91c1c;
    color: #fff;
    border-color: #ef4444;
    box-shadow: 0 0 10px rgba(239, 68, 68, 0.6);
}

.kb-key.state-green {
    background: #15803d !important;
    color: #ffffff !important;
    border-color: #4ade80 !important;
    box-shadow: 0 0 8px rgba(34, 197, 94, 0.6) !important;
}
.kb-key.state-yellow {
    background: #a16207 !important;
    color: #ffffff !important;
    border-color: #facc15 !important;
    box-shadow: 0 0 8px rgba(250, 204, 21, 0.6) !important;
}
.kb-key.state-dark {
    background: #090d14 !important;
    color: #334155 !important;
    border-color: #1a222d !important;
    box-shadow: none !important;
    opacity: 0.35;
}

.hud-toast {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(15, 23, 42, 0.95);
    border: 1px solid #facc15;
    color: #facc15;
    padding: 6px 16px;
    border-radius: 6px;
    font-family: 'Orbitron', sans-serif;
    font-size: 0.8rem;
    font-weight: 700;
    box-shadow: 0 0 15px rgba(250, 204, 21, 0.6);
    z-index: 500;
    animation: slide-toast 0.25s ease;
}

/* Shake Animation */
.shake-deck {
    animation: shake 0.4s cubic-bezier(0.36, 0.07, 0.19, 0.97) both;
}

/* Result Modals */
.overlay-modal {
    position: absolute;
    inset: 0;
    background: rgba(2, 6, 23, 0.88);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: none;
    align-items: center;
    justify-content: center;
}
.overlay-modal.show { display: flex; }

.modal-card {
    background: linear-gradient(180deg, #0f1a2a 0%, #080f19 100%);
    border: 2px solid #00f0ff;
    border-radius: 12px;
    padding: 24px 30px;
    max-width: 480px;
    width: 90%;
    text-align: center;
    box-shadow: 0 0 40px rgba(0, 240, 255, 0.4);
    animation: pop-modal 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.modal-card.victory { border-color: #22c55e; box-shadow: 0 0 40px rgba(34, 197, 94, 0.4); }
.modal-card.defeat { border-color: #ff2233; box-shadow: 0 0 40px rgba(255, 34, 51, 0.5); }

.modal-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.4rem;
    font-weight: 900;
    margin-bottom: 12px;
    letter-spacing: 1px;
}
.modal-card.victory .modal-title { color: #22c55e; text-shadow: 0 0 10px rgba(34, 197, 94, 0.7); }
.modal-card.defeat .modal-title { color: #ff2233; text-shadow: 0 0 10px rgba(255, 34, 51, 0.7); }

.modal-word {
    font-family: 'Orbitron', monospace;
    font-size: 2.1rem;
    color: #ffffff;
    letter-spacing: 4px;
    margin-bottom: 6px;
    text-shadow: 0 0 15px rgba(0, 240, 255, 0.6);
}
.modal-desc {
    font-size: 0.95rem;
    color: #cbd5e1;
    margin-bottom: 16px;
    line-height: 1.4;
}
.modal-stats {
    display: flex;
    justify-content: space-around;
    background: rgba(2, 6, 23, 0.6);
    border: 1px solid rgba(56, 189, 248, 0.2);
    border-radius: 8px;
    padding: 10px;
    margin-bottom: 20px;
}
.modal-stats .stat-item .stat-val {
    font-family: 'Orbitron', monospace;
    font-size: 1.25rem;
    color: #00f0ff;
    font-weight: 800;
}
.modal-stats .stat-item .stat-lbl {
    font-size: 0.7rem;
    color: #94a3b8;
    text-transform: uppercase;
}
.modal-btn {
    background: #22c55e;
    color: #020617;
    border: none;
    padding: 10px 24px;
    border-radius: 6px;
    font-family: 'Orbitron', sans-serif;
    font-size: 0.9rem;
    font-weight: 800;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 0 15px rgba(34, 197, 94, 0.7);
}
.modal-btn:hover { background: #4ade80; transform: translateY(-2px); }
.modal-btn.defeat-btn {
    background: #ff2233;
    color: #ffffff;
    box-shadow: 0 0 15px rgba(255, 34, 51, 0.7);
}
.modal-btn.defeat-btn:hover { background: #ef4444; }


/* ====================================================
   INTERACTIVE SPOTLIGHT TUTORIAL & TYPEWRITER ENGINE
   ==================================================== */
.tutorial-overlay {
    position: absolute;
    inset: 0;
    z-index: 2000;
    display: none;
    overflow: hidden;
    pointer-events: auto;
}
.tutorial-overlay.show { display: block; }

/* The glowing spotlight cutout window */
.tutorial-spotlight-box {
    position: absolute;
    box-shadow: 0 0 0 9999px rgba(2, 6, 16, 0.88), 0 0 25px rgba(0, 240, 255, 0.7);
    border: 2px solid var(--cyan-neon, #00f0ff);
    border-radius: 12px;
    transition: all 0.35s cubic-bezier(0.25, 1, 0.5, 1);
    pointer-events: none;
    z-index: 2010;
}
.tutorial-spotlight-box::after {
    content: '';
    position: absolute;
    inset: -4px;
    border: 1px dashed rgba(0, 240, 255, 0.5);
    border-radius: 14px;
    animation: rotate-dash 10s linear infinite;
}

/* Briefing Dialog Card */
.tutorial-card {
    position: absolute;
    width: clamp(280px, 32vw, 420px);
    background: linear-gradient(180deg, rgba(15, 26, 42, 0.98) 0%, rgba(8, 15, 25, 0.98) 100%);
    border: 2px solid var(--cyan-neon, #00f0ff);
    border-radius: 12px;
    padding: 18px 20px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.9), 0 0 25px rgba(0, 240, 255, 0.35);
    z-index: 2020;
    cursor: pointer;
    transition: top 0.35s ease, left 0.35s ease;
    backdrop-filter: blur(12px);
}

.tut-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 10px;
    border-bottom: 1px solid rgba(56, 189, 248, 0.3);
    padding-bottom: 6px;
}
.tut-step-tag {
    font-family: 'Orbitron', monospace;
    font-size: 0.72rem;
    color: #38bdf8;
    font-weight: 800;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: 6px;
}
.tut-step-dots {
    display: flex;
    gap: 4px;
}
.tut-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: #334155;
    transition: all 0.2s;
}
.tut-dot.active {
    background: var(--cyan-neon, #00f0ff);
    box-shadow: 0 0 6px var(--cyan-neon, #00f0ff);
}

.tut-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.95rem;
    font-weight: 900;
    color: #ffffff;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
    text-shadow: 0 0 10px rgba(0, 240, 255, 0.5);
}

.tut-body {
    font-family: 'Share Tech Mono', monospace;
    font-size: 0.88rem;
    color: #cbd5e1;
    line-height: 1.5;
    min-height: 70px;
    margin-bottom: 14px;
    position: relative;
}
.tut-cursor {
    display: inline-block;
    width: 7px;
    height: 14px;
    background: var(--cyan-neon, #00f0ff);
    vertical-align: middle;
    margin-left: 2px;
    animation: blink-cursor 0.7s infinite;
}
@keyframes blink-cursor { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

.tut-hint-click {
    font-size: 0.65rem;
    color: #94a3b8;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 4px;
}

.tut-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 8px;
}
.btn-tut-skip {
    background: transparent;
    border: 1px solid #475569;
    color: #94a3b8;
    padding: 6px 14px;
    border-radius: 6px;
    font-family: 'Orbitron', sans-serif;
    font-size: 0.72rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s;
}
.btn-tut-skip:hover {
    border-color: #ef4444;
    color: #ef4444;
    background: rgba(239, 68, 68, 0.1);
}

.btn-tut-next {
    background: var(--cyan-neon, #00f0ff);
    border: none;
    color: #020617;
    padding: 6px 18px;
    border-radius: 6px;
    font-family: 'Orbitron', sans-serif;
    font-size: 0.78rem;
    font-weight: 800;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 0 12px rgba(0, 240, 255, 0.5);
    display: flex;
    align-items: center;
    gap: 4px;
}
.btn-tut-next:hover {
    background: #38bdf8;
    transform: translateY(-1px);
    box-shadow: 0 0 16px rgba(0, 240, 255, 0.6);
}

/* Initial Prompt Modal (Trước khi chơi) */
.tutorial-prompt-modal {
    position: absolute;
    inset: 0;
    background: rgba(2, 6, 23, 0.92);
    backdrop-filter: blur(10px);
    z-index: 2500;
    display: flex;
    align-items: center;
    justify-content: center;
}
.prompt-card {
    background: linear-gradient(180deg, #0f1c2e 0%, #08101a 100%);
    border: 2px solid var(--cyan-neon, #00f0ff);
    border-radius: 14px;
    padding: 24px 30px;
    max-width: 460px;
    width: 90%;
    text-align: center;
    box-shadow: 0 0 45px rgba(0, 240, 255, 0.4);
    animation: pop-modal 0.35s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.prompt-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.25rem;
    font-weight: 900;
    color: var(--cyan-neon, #00f0ff);
    text-shadow: 0 0 12px rgba(0, 240, 255, 0.5);
    margin-bottom: 12px;
    letter-spacing: 1px;
}
.prompt-desc {
    font-size: 0.92rem;
    color: #cbd5e1;
    line-height: 1.5;
    margin-bottom: 22px;
}
.prompt-actions {
    display: flex;
    gap: 12px;
    justify-content: center;
}
.btn-prompt-guide {
    background: var(--cyan-neon, #00f0ff);
    color: #020617;
    border: none;
    padding: 10px 20px;
    border-radius: 6px;
    font-family: 'Orbitron', sans-serif;
    font-size: 0.85rem;
    font-weight: 800;
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 0 15px rgba(0, 240, 255, 0.5);
}
.btn-prompt-guide:hover { background: #38bdf8; transform: translateY(-2px); }
.btn-prompt-play {
    background: rgba(34, 197, 94, 0.2);
    border: 1px solid #22c55e;
    color: #86efac;
    padding: 10px 20px;
    border-radius: 6px;
    font-family: 'Orbitron', sans-serif;
    font-size: 0.85rem;
    font-weight: 800;
    cursor: pointer;
    transition: all 0.2s;
}
.btn-prompt-play:hover {
    background: #22c55e;
    color: #020617;
    box-shadow: 0 0 15px rgba(34, 197, 94, 0.6);
    transform: translateY(-2px);
}

.btn-fs-tut {
    border-color: #38bdf8 !important;
    color: #38bdf8 !important;
}
.btn-fs-tut:hover {
    background: rgba(56, 189, 248, 0.15) !important;
    box-shadow: 0 0 10px rgba(56, 189, 248, 0.4);
}