/* ============================================
   NEXUSDEFENSE — STYLES
   © 2024-2026 PRESTATIC (SARL) — SOUILAH AKIM
   ============================================ */

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

:root {
    --bg: #0a0a1a;
    --bg2: #12122a;
    --bg3: #1a1a3a;
    --text: #ffffff;
    --text2: #b0b0c0;
    --muted: #606070;
    --purple: #6c5ce7;
    --cyan: #00cec9;
    --green: #00b894;
    --orange: #fdcb6e;
    --red: #d63031;
    --blue: #0984e3;
    --radius: 12px;
}

body {
    font-family: 'Poppins', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    overflow: hidden;
    user-select: none;
}

/* ===== SCREENS ===== */

.screen {
    display: none;
    position: fixed;
    inset: 0;
}
.screen.active { display: flex; }

/* ===== MENU ===== */

#screenMenu {
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.menu-bg {
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 30% 20%, rgba(108,92,231,0.15) 0%, transparent 50%),
        radial-gradient(ellipse at 70% 80%, rgba(214,48,49,0.1) 0%, transparent 50%);
}

.menu-container {
    position: relative;
    z-index: 1;
    text-align: center;
    padding: 40px 24px;
}

.menu-title {
    font-family: 'Orbitron', sans-serif;
    font-size: 3.2rem;
    font-weight: 900;
    margin-bottom: 8px;
    background: linear-gradient(135deg, #fff 30%, #ff6b6b 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.menu-title span {
    background: linear-gradient(135deg, #ff6b6b, #d63031);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.menu-subtitle {
    font-size: 1.05rem;
    color: var(--text2);
    margin-bottom: 40px;
}

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
    max-width: 320px;
    margin: 0 auto;
}

.menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 14px 24px;
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius);
    background: rgba(255,255,255,0.04);
    color: var(--text);
    font-family: 'Poppins', sans-serif;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.25s;
}
.menu-btn:hover {
    background: rgba(255,255,255,0.08);
    border-color: rgba(255,255,255,0.2);
    transform: translateY(-2px);
}
.menu-btn.primary {
    background: linear-gradient(135deg, rgba(214,48,49,0.2), rgba(108,92,231,0.15));
    border-color: rgba(214,48,49,0.4);
}
.menu-btn.primary:hover {
    background: linear-gradient(135deg, rgba(214,48,49,0.35), rgba(108,92,231,0.25));
    box-shadow: 0 4px 20px rgba(214,48,49,0.2);
}
.menu-btn.danger {
    border-color: rgba(214,48,49,0.3);
    color: #ff6b6b;
}

.menu-footer {
    margin-top: 48px;
    font-size: 0.7rem;
    color: var(--muted);
}
.menu-footer strong { color: var(--purple); }
.back-link {
    display: inline-block;
    margin-bottom: 8px;
    color: var(--purple);
    text-decoration: none;
    font-size: 0.8rem;
}
.back-link:hover { color: #fff; }

/* ===== HOW TO PLAY ===== */

.howto-container, .scores-container {
    max-width: 700px;
    margin: 0 auto;
    padding: 40px 24px;
    overflow-y: auto;
    max-height: 100vh;
}

.howto-container h2, .scores-container h2 {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.6rem;
    margin-bottom: 24px;
    text-align: center;
}

.back-btn {
    background: none;
    border: none;
    color: var(--purple);
    font-size: 0.9rem;
    cursor: pointer;
    margin-bottom: 16px;
    font-family: 'Poppins', sans-serif;
}
.back-btn:hover { color: #fff; }

.howto-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 16px;
}

.howto-card {
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: var(--radius);
    padding: 20px;
}
.howto-icon { font-size: 2rem; margin-bottom: 8px; }
.howto-card h3 { font-size: 1rem; margin-bottom: 8px; color: var(--cyan); }
.howto-card p { font-size: 0.85rem; color: var(--text2); line-height: 1.6; }

/* ===== SCORES ===== */

.scores-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.scores-empty { color: var(--muted); text-align: center; padding: 40px 0; }

.score-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: rgba(255,255,255,0.04);
    border-radius: 8px;
}
.score-rank {
    font-family: 'Orbitron', sans-serif;
    font-weight: 800;
    font-size: 0.9rem;
    min-width: 30px;
    text-align: center;
}
.score-row:nth-child(1) .score-rank { color: #ffd700; }
.score-row:nth-child(2) .score-rank { color: #c0c0c0; }
.score-row:nth-child(3) .score-rank { color: #cd7f32; }
.score-info { flex: 1; }
.score-info strong { font-size: 0.85rem; }
.score-info small { color: var(--muted); font-size: 0.7rem; margin-left: 8px; }
.score-pts {
    font-family: 'Orbitron', sans-serif;
    font-weight: 700;
    color: var(--orange);
}

/* ===== GAME HUD ===== */

.game-hud {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 16px;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid rgba(255,255,255,0.06);
    z-index: 10;
    height: 48px;
}

.hud-left, .hud-center, .hud-right { display: flex; align-items: center; gap: 16px; }

.hud-btn {
    background: none;
    border: 1px solid rgba(255,255,255,0.15);
    color: #fff;
    font-size: 1.1rem;
    cursor: pointer;
    padding: 4px 8px;
    border-radius: 6px;
    transition: 0.2s;
}
.hud-btn:hover { background: rgba(255,255,255,0.1); }

.hud-stat { display: flex; flex-direction: column; align-items: center; gap: 1px; }
.hud-label { font-size: 0.6rem; color: var(--muted); text-transform: uppercase; letter-spacing: 1px; }
.hud-value { font-family: 'Orbitron', sans-serif; font-weight: 700; font-size: 0.9rem; }
.hud-stat.gold .hud-value { color: var(--orange); }
.hud-stat.hp .hud-value { color: var(--green); }

.hp-bar-outer {
    width: 80px;
    height: 6px;
    background: rgba(255,255,255,0.1);
    border-radius: 3px;
    overflow: hidden;
}
.hp-bar-inner {
    height: 100%;
    background: linear-gradient(90deg, var(--green), #55efc4);
    border-radius: 3px;
    transition: width 0.3s;
}

.nuke-wrapper {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3px;
}
.nuke-btn {
    font-size: 1.2rem;
    background: rgba(253,203,110,0.1);
    border-color: rgba(253,203,110,0.3);
    transition: all 0.3s;
    position: relative;
}
.nuke-btn.charged {
    background: rgba(253,203,110,0.25);
    border-color: #fdcb6e;
    box-shadow: 0 0 12px rgba(253,203,110,0.4);
    animation: nukeGlow 1s ease-in-out infinite alternate;
}
.nuke-btn.disabled {
    opacity: 0.35;
    cursor: default;
    filter: grayscale(80%);
}
.nuke-btn #nukeCharges {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.7rem;
    font-weight: 700;
}
@keyframes nukeGlow {
    from { box-shadow: 0 0 8px rgba(253,203,110,0.3); }
    to { box-shadow: 0 0 20px rgba(253,203,110,0.6); }
}
.nuke-bar-outer {
    width: 56px;
    height: 5px;
    background: rgba(255,255,255,0.1);
    border-radius: 2px;
    overflow: hidden;
}
.nuke-bar-inner {
    height: 100%;
    background: linear-gradient(90deg, #00b894, #55efc4);
    border-radius: 2px;
    transition: width 0.4s;
}

/* ===== GAME TIP ===== */

.game-tip {
    text-align: center;
    padding: 5px 16px;
    background: rgba(108,92,231,0.1);
    border-bottom: 1px solid rgba(108,92,231,0.15);
    font-size: 0.75rem;
    color: #a0a0c0;
    flex-shrink: 0;
}

/* ===== GAME AREA ===== */

#screenGame {
    flex-direction: column;
}

.game-area {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    background: #0d1117;
}

#gameCanvas {
    display: block;
}

/* ===== TOWER PANEL ===== */

.tower-panel {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(8px);
    border-top: 1px solid rgba(255,255,255,0.06);
}

.tower-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2px;
    padding: 8px 14px;
    border-radius: 10px;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    cursor: pointer;
    transition: all 0.2s;
    min-width: 64px;
}
.tower-btn:hover {
    background: rgba(255,255,255,0.1);
    border-color: rgba(255,255,255,0.25);
    transform: translateY(-2px);
}
.tower-btn.active {
    background: rgba(108,92,231,0.2);
    border-color: var(--purple);
    box-shadow: 0 0 12px rgba(108,92,231,0.3);
}
.tower-btn.disabled {
    opacity: 0.35;
    pointer-events: none;
}
.tower-icon { font-size: 1.3rem; }
.tower-name { font-size: 0.6rem; color: var(--text2); font-weight: 600; }
.tower-cost { font-size: 0.6rem; color: var(--orange); font-weight: 700; }

.tower-btn.start-wave {
    background: linear-gradient(135deg, rgba(0,184,148,0.2), rgba(0,206,201,0.1));
    border-color: var(--green);
}
.tower-btn.start-wave:hover {
    background: linear-gradient(135deg, rgba(0,184,148,0.35), rgba(0,206,201,0.2));
    box-shadow: 0 0 15px rgba(0,184,148,0.3);
}

/* ===== TOWER INFO ===== */

.tower-info {
    position: absolute;
    bottom: 80px;
    left: 50%;
    transform: translateX(-50%);
    background: rgba(18,18,42,0.95);
    border: 1px solid rgba(255,255,255,0.12);
    border-radius: var(--radius);
    padding: 16px;
    min-width: 260px;
    z-index: 20;
    backdrop-filter: blur(10px);
}
.tower-info h3 { font-size: 0.95rem; margin-bottom: 8px; }
.info-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4px;
    font-size: 0.75rem;
    color: var(--text2);
    margin-bottom: 12px;
}
.info-actions { display: flex; gap: 6px; }
.info-btn {
    flex: 1;
    padding: 8px;
    border-radius: 8px;
    border: 1px solid rgba(255,255,255,0.1);
    background: rgba(255,255,255,0.05);
    color: #fff;
    font-size: 0.75rem;
    font-family: 'Poppins', sans-serif;
    font-weight: 600;
    cursor: pointer;
    transition: 0.2s;
}
.info-btn:hover { background: rgba(255,255,255,0.1); }
.info-btn.upgrade { border-color: rgba(0,184,148,0.4); color: var(--green); }
.info-btn.power { border-color: rgba(214,48,49,0.4); color: #ff6b6b; }
.info-btn.resist { border-color: rgba(9,132,227,0.4); color: var(--blue); }
.info-btn.heal { border-color: rgba(232,67,147,0.4); color: #e84393; }
.info-btn.sell { border-color: rgba(253,203,110,0.4); color: var(--orange); }
.info-btn.disabled {
    opacity: 0.25;
    pointer-events: none;
    filter: grayscale(100%);
    border-color: rgba(255,255,255,0.05) !important;
    color: #555 !important;
}
.info-btn.close { flex: 0; padding: 8px 12px; }

/* ===== PAUSE & GAME OVER ===== */

.pause-overlay, .gameover-overlay {
    position: fixed;
    inset: 0;
    z-index: 100;
    background: rgba(0,0,0,0.7);
    backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
}

.pause-panel, .gameover-panel {
    background: var(--bg2);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 20px;
    padding: 32px;
    text-align: center;
    min-width: 300px;
}
.pause-panel h2, .gameover-panel h2 {
    font-family: 'Orbitron', sans-serif;
    margin-bottom: 20px;
}
.pause-panel .menu-btn, .gameover-panel .menu-btn {
    width: 100%;
    margin-bottom: 8px;
}

.gameover-stats {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-bottom: 24px;
}
.go-stat { text-align: center; }
.go-label { display: block; font-size: 0.7rem; color: var(--muted); text-transform: uppercase; }
.go-value {
    display: block;
    font-family: 'Orbitron', sans-serif;
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--orange);
}

/* ===== MOBILE BOTTOM HUD ===== */

.hud-mobile-bottom {
    display: none;
}

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

@media (max-width: 600px) {
    .menu-title { font-size: 2.2rem; }
    .game-hud { padding: 3px 6px; height: 32px; gap: 2px; }
    #btnHelp { display: none; }
    .hud-center { display: none; }
    .hud-right { display: none; }
    .hud-left { gap: 6px; }
    #btnBack, #btnPause { padding: 2px 5px; font-size: 0.9rem; }
    .hud-value { font-size: 0.7rem; }
    .hud-label { font-size: 0.5rem; }
    .game-tip { padding: 3px 8px; font-size: 0.65rem; }
    .game-area {
        align-items: flex-start;
        justify-content: center;
    }
    .hud-mobile-bottom {
        display: flex;
        align-items: center;
        justify-content: center;
        gap: 14px;
        padding: 4px 8px;
        background: rgba(0,0,0,0.6);
        backdrop-filter: blur(8px);
        border-top: 1px solid rgba(255,255,255,0.06);
        border-bottom: 1px solid rgba(255,255,255,0.06);
    }
    .hud-mobile-bottom .hud-value { font-size: 0.7rem; }
    .hud-mobile-bottom .hud-label { font-size: 0.5rem; }
    .hud-mobile-bottom .hp-bar-outer { width: 40px; }
    .hud-mobile-bottom .nuke-wrapper { gap: 1px; }
    .hud-mobile-bottom .nuke-bar-outer { width: 40px; height: 3px; }
    .hud-mobile-bottom .nuke-btn { font-size: 0.9rem; padding: 2px 5px; }
    .tower-panel { gap: 3px; padding: 4px 6px; }
    .tower-btn { padding: 4px 6px; min-width: 44px; }
    .tower-icon { font-size: 1rem; }
    .tower-name { font-size: 0.5rem; }
    .tower-cost { font-size: 0.5rem; }
    .tower-info {
        bottom: 118px;
        left: 2%;
        right: 2%;
        transform: none;
        min-width: 0;
        width: 96%;
        padding: 8px 10px;
    }
    .tower-info h3 { font-size: 0.75rem; }
    .info-stats { font-size: 0.65rem; gap: 2px; }
    .info-btn { font-size: 0.65rem; padding: 5px 4px; }
    .info-actions { gap: 4px; }
}