/* ──────────────────────────────────────────────────────────
   BATTLESHARKS II - GAME STYLESHEET
   Aesthetics: Deep Blue Dark Mode, Glowing Cyans, Neon Purples
   ────────────────────────────────────────────────────────── */

   :root {
    --color-bg: #03030d;
    --color-bg-panel: rgba(10, 10, 26, 0.75);
    --color-border: rgba(0, 242, 254, 0.2);
    --color-border-active: rgba(0, 242, 254, 0.7);
    --color-neon-cyan: #00f2fe;
    --color-neon-purple: #8b5cf6;
    --color-neon-green: #05f3a2;
    --color-neon-red: #ff3b30;
    --color-text-main: #e2e8f0;
    --color-text-muted: #94a3b8;
    --font-cyber: 'Orbitron', sans-serif;
    --font-sans: 'Inter', sans-serif;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-sans);
    background-color: var(--color-bg);
    color: var(--color-text-main);
    overflow-x: hidden;
}

.game-wrapper {
    position: relative;
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
    box-sizing: border-box;
}

/* ─── HUD Layout ─── */
.hud {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--color-bg-panel);
    border: 1px solid var(--color-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 16px;
    padding: 15px 25px;
    margin-bottom: 20px;
    box-shadow: 0 8px 32px 0 rgba(0, 242, 254, 0.05);
}

.hud-left, .hud-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.hud-stat {
    display: flex;
    flex-direction: column;
}

.hud-label {
    font-family: var(--font-cyber);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--color-text-muted);
    margin-bottom: 4px;
}

.hud-value {
    font-family: var(--font-cyber);
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--color-neon-cyan);
    text-shadow: 0 0 10px rgba(0, 242, 254, 0.4);
}

.score-stat .hud-value {
    color: var(--color-neon-purple);
    text-shadow: 0 0 10px rgba(139, 92, 246, 0.4);
}

/* ─── Health Bar ─── */
.health-stat {
    min-width: 200px;
}

.health-bar-container {
    width: 100%;
    height: 10px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 5px;
    overflow: hidden;
    margin: 4px 0;
    border: 1px solid rgba(255, 59, 48, 0.2);
}

.health-bar {
    height: 100%;
    background: linear-gradient(90deg, #ff3b30, #ff9500);
    width: 100%;
    transition: width 0.2s ease;
    box-shadow: 0 0 8px rgba(255, 59, 48, 0.6);
}

#hudHealthText {
    font-size: 0.85rem;
    color: #ff6b6b;
    text-shadow: none;
}

/* ─── Viewport ─── */
.viewport-container {
    position: relative;
    width: 100%;
    border-radius: 20px;
    overflow: hidden;
    border: 2px solid var(--color-border);
    background: #020208;
    box-shadow: 0 15px 45px rgba(0, 0, 0, 0.7);
    aspect-ratio: 1000 / 600;
}

#gameCanvas {
    display: block;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, #0b1a30 0%, #030712 100%);
    cursor: crosshair;
}

/* Quick Tips bar inside viewport */
.quick-tips {
    position: absolute;
    bottom: 15px;
    left: 20px;
    display: flex;
    gap: 12px;
    background: rgba(2, 2, 8, 0.75);
    backdrop-filter: blur(5px);
    padding: 6px 16px;
    border-radius: 20px;
    font-size: 0.8rem;
    color: var(--color-text-muted);
    border: 1px solid rgba(255, 255, 255, 0.1);
    z-index: 5;
    pointer-events: none;
}

.quick-tips strong {
    color: var(--color-neon-cyan);
}

.quick-tips .separator {
    color: rgba(255,255,255,0.2);
}

/* Floating Lab Button */
.lab-trigger-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    background: linear-gradient(135deg, var(--color-neon-purple), #6d28d9);
    border: 1px solid rgba(255,255,255,0.2);
    border-radius: 30px;
    padding: 12px 24px;
    font-family: var(--font-cyber);
    font-weight: 700;
    font-size: 0.9rem;
    color: white;
    cursor: pointer;
    box-shadow: 0 0 20px rgba(139, 92, 246, 0.5);
    transition: all 0.3s ease;
    z-index: 5;
}

.lab-trigger-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 0 30px rgba(139, 92, 246, 0.8);
    background: linear-gradient(135deg, #9333ea, var(--color-neon-purple));
}

.pulse-ring {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 30px;
    border: 2px solid var(--color-neon-purple);
    animation: pulse 1.8s infinite;
    pointer-events: none;
}

@keyframes pulse {
    0% { transform: scale(1); opacity: 0.8; }
    100% { transform: scale(1.25); opacity: 0; }
}

/* ─── Action Row ─── */
.action-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-top: 15px;
}

.equipped-readout {
    display: flex;
    align-items: center;
    gap: 12px;
}

.readout-title {
    font-family: var(--font-cyber);
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

.equipped-slots {
    display: flex;
    gap: 10px;
}

.equipped-item {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    padding: 6px 14px;
    border-radius: 8px;
    font-family: var(--font-cyber);
    font-size: 0.8rem;
    color: var(--color-neon-cyan);
}

.equipped-item.empty {
    color: var(--color-text-muted);
    border-color: rgba(255, 255, 255, 0.05);
}

/* ─── Modal Overlays (Screens) ─── */
.screen-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(2, 2, 8, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 10;
    opacity: 1;
    transition: opacity 0.3s ease;
    padding: 40px;
    box-sizing: border-box;
    text-align: center;
}

.screen-overlay.hidden {
    opacity: 0;
    pointer-events: none;
    display: none !important;
}

/* Start / Game Over Typography */
.lab-logo-container {
    margin-bottom: 20px;
}

.logo-big {
    font-family: var(--font-cyber);
    font-size: 4rem;
    font-weight: 900;
    letter-spacing: 4px;
    background: linear-gradient(135deg, var(--color-neon-cyan), var(--color-neon-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 30px rgba(0, 242, 254, 0.2);
    margin: 10px 0;
}

.red-neon {
    background: linear-gradient(135deg, #ff3b30, #ff9500);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-shadow: 0 0 30px rgba(255, 59, 48, 0.2);
}

.cyan-neon {
    background: linear-gradient(135deg, var(--color-neon-cyan), #007aff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle-neon {
    font-family: var(--font-cyber);
    font-size: 1.1rem;
    font-weight: 700;
    letter-spacing: 6px;
    color: var(--color-neon-cyan);
    text-shadow: 0 0 10px rgba(0, 242, 254, 0.5);
}

.tech-tag {
    font-family: var(--font-cyber);
    font-size: 0.8rem;
    background: rgba(0, 242, 254, 0.15);
    color: var(--color-neon-cyan);
    padding: 3px 12px;
    border-radius: 4px;
    letter-spacing: 2px;
    border: 1px solid rgba(0, 242, 254, 0.3);
}

.story {
    max-width: 600px;
    font-size: 1rem;
    line-height: 1.6;
    color: var(--color-text-muted);
    margin: 20px 0 30px 0;
}

.story strong {
    color: var(--color-text-main);
}

/* ─── Buttons ─── */
.btn {
    font-family: var(--font-cyber);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: 8px;
    padding: 14px 28px;
    cursor: pointer;
    transition: all 0.3s ease;
    border: 1px solid transparent;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-neon-purple), #7c3aed);
    color: white;
    box-shadow: 0 4px 15px rgba(139, 92, 246, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 22px rgba(139, 92, 246, 0.5);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    color: var(--color-text-main);
    border-color: rgba(255, 255, 255, 0.15);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-neon-cyan);
}

.btn-start {
    font-size: 1.2rem;
    padding: 16px 40px;
    background: linear-gradient(135deg, var(--color-neon-cyan), #007aff);
    color: #03030d;
    font-weight: 800;
    box-shadow: 0 0 30px rgba(0, 242, 254, 0.4);
    border-radius: 30px;
    border: none;
    font-family: var(--font-cyber);
}

.btn-start:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 0 40px rgba(0, 242, 254, 0.6);
}

.controls-hint {
    margin-top: 30px;
    font-size: 0.85rem;
    color: rgba(255,255,255,0.4);
    line-height: 1.5;
}

.controls-hint strong {
    color: var(--color-neon-cyan);
}

/* Final Stats layout */
.final-stats {
    background: rgba(255,255,255,0.03);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 12px;
    padding: 20px;
    width: 320px;
    margin-bottom: 30px;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    padding: 10px 0;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    font-family: var(--font-cyber);
}

.stat-row:last-child {
    border-bottom: none;
}

.stat-row span:first-child {
    color: var(--color-text-muted);
}

.stat-row .highlight {
    color: var(--color-neon-cyan);
    font-weight: 700;
}

/* ─── R&D Lab Hub Modal ─── */
#rdLabOverlay {
    padding: 20px;
}

.lab-modal {
    background: rgba(6, 6, 20, 0.85);
    border: 2px solid var(--color-neon-cyan);
    box-shadow: 0 0 50px rgba(0, 242, 254, 0.2);
    border-radius: 24px;
    width: 100%;
    max-width: 850px;
    max-height: 90%;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    animation: modalSlide 0.3s cubic-bezier(0.16, 1, 0.3, 1);
}

@keyframes modalSlide {
    0% { transform: translateY(30px); opacity: 0; }
    100% { transform: translateY(0); opacity: 1; }
}

.lab-header {
    padding: 25px 30px 15px 30px;
    border-bottom: 1px solid rgba(0, 242, 254, 0.15);
    position: relative;
    text-align: left;
}

.lab-header h2 {
    font-family: var(--font-cyber);
    font-size: 1.8rem;
    font-weight: 800;
    margin: 0 0 5px 0;
    color: var(--color-neon-cyan);
    text-shadow: 0 0 15px rgba(0, 242, 254, 0.3);
}

.lab-header p {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    margin: 0;
}

.close-btn {
    position: absolute;
    top: 25px;
    right: 30px;
    background: none;
    border: none;
    color: var(--color-text-muted);
    font-size: 2rem;
    cursor: pointer;
    transition: color 0.2s;
}

.close-btn:hover {
    color: var(--color-neon-red);
}

.lab-content {
    flex: 1;
    overflow-y: auto;
    padding: 25px 30px;
    text-align: left;
}

/* Resources Pills */
.lab-resources {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
}

.resource-pill {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: 20px;
    padding: 8px 18px;
    font-family: var(--font-cyber);
    font-size: 0.9rem;
    font-weight: 700;
}

.resource-pill .highlight {
    color: var(--color-neon-cyan);
    font-weight: 800;
}

/* Tabs */
.lab-tabs {
    display: flex;
    border-bottom: 1px solid rgba(255,255,255,0.08);
    margin-bottom: 25px;
    gap: 10px;
}

.lab-tab {
    background: none;
    border: none;
    padding: 12px 24px;
    font-family: var(--font-cyber);
    font-weight: 700;
    font-size: 0.95rem;
    color: var(--color-text-muted);
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.2s;
}

.lab-tab:hover {
    color: var(--color-neon-cyan);
}

.lab-tab.active {
    color: var(--color-neon-cyan);
    border-bottom-color: var(--color-neon-cyan);
}

/* Tab panes */
.lab-pane {
    display: none;
}

.lab-pane.active {
    display: block;
}

/* Upgrades Grid */
.upgrades-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 15px;
}

.upgrade-card {
    background: rgba(255,255,255,0.02);
    border: 1px solid rgba(255,255,255,0.06);
    border-radius: 12px;
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    transition: all 0.2s;
}

.upgrade-card:hover {
    background: rgba(0, 242, 254, 0.03);
    border-color: rgba(0, 242, 254, 0.25);
}

.upgrade-icon {
    font-size: 2.2rem;
    margin-right: 20px;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 10px;
}

.upgrade-details {
    flex: 1;
}

.upgrade-details h3 {
    margin: 0 0 5px 0;
    font-family: var(--font-cyber);
    font-size: 1.15rem;
    color: var(--color-text-main);
}

.upgrade-details p {
    margin: 0 0 8px 0;
    font-size: 0.85rem;
    color: var(--color-text-muted);
    line-height: 1.4;
}

.upgrade-cost {
    font-family: var(--font-cyber);
    font-size: 0.8rem;
    color: var(--color-neon-green);
    font-weight: 600;
}

.btn-upgrade {
    background: rgba(0, 242, 254, 0.1);
    border: 1px solid var(--color-neon-cyan);
    color: var(--color-neon-cyan);
    font-family: var(--font-cyber);
    font-weight: 700;
    padding: 10px 20px;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-upgrade:hover {
    background: var(--color-neon-cyan);
    color: #03030d;
    box-shadow: 0 0 15px rgba(0, 242, 254, 0.4);
}

.btn-upgrade.installed {
    background: rgba(5, 243, 162, 0.15) !important;
    border-color: var(--color-neon-green) !important;
    color: var(--color-neon-green) !important;
    cursor: default;
    box-shadow: none !important;
}

.btn-upgrade.disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.aquarium-hint {
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 20px;
    border-left: 3px solid var(--color-neon-purple);
    padding-left: 10px;
}

.lab-footer {
    padding: 20px 30px;
    border-top: 1px solid rgba(255,255,255,0.08);
    display: flex;
    justify-content: flex-end;
}

/* Custom Scrollbar for Lab Content */
.lab-content::-webkit-scrollbar {
    width: 6px;
}
.lab-content::-webkit-scrollbar-track {
    background: rgba(0,0,0,0.2);
}
.lab-content::-webkit-scrollbar-thumb {
    background: rgba(0, 242, 254, 0.2);
    border-radius: 3px;
}
.lab-content::-webkit-scrollbar-thumb:hover {
    background: var(--color-neon-cyan);
}

/* Responsive adjustment */
@media (max-width: 900px) {
    .hud {
        flex-direction: column;
        gap: 15px;
        align-items: stretch;
    }
    .hud-left, .hud-right {
        justify-content: space-between;
    }
    .lab-resources {
        flex-wrap: wrap;
    }
    .logo-big {
        font-size: 2.5rem;
    }
}

/* ─── Leveling & Growth HUD ─── */
.growth-stat {
    min-width: 180px;
}

.growth-bar-container {
    width: 100%;
    height: 10px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 5px;
    overflow: hidden;
    margin: 4px 0;
    border: 1px solid rgba(139, 92, 246, 0.2);
}

.growth-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--color-neon-purple), var(--color-neon-cyan));
    width: 0%;
    transition: width 0.3s ease;
    box-shadow: 0 0 8px rgba(139, 92, 246, 0.6);
}

#hudLevelText {
    font-size: 0.85rem;
    color: var(--color-neon-purple);
    font-weight: 700;
}

/* ─── Boss HP Bar ─── */
.boss-bar-container {
    position: absolute;
    top: 25px;
    left: 50%;
    transform: translateX(-50%);
    width: 60%;
    background: rgba(2, 2, 8, 0.85);
    border: 1px solid rgba(255, 59, 48, 0.4);
    border-radius: 10px;
    padding: 10px 15px;
    z-index: 6;
    box-shadow: 0 0 20px rgba(255, 59, 48, 0.25);
    text-align: center;
}

.boss-bar-container.hidden {
    display: none !important;
}

.boss-name {
    font-family: var(--font-cyber);
    font-size: 0.85rem;
    font-weight: 900;
    color: var(--color-neon-red);
    margin-bottom: 5px;
    letter-spacing: 2px;
}

.boss-health-bg {
    width: 100%;
    height: 12px;
    background: rgba(255,255,255,0.06);
    border-radius: 6px;
    overflow: hidden;
    border: 1px solid rgba(255, 59, 48, 0.2);
}

.boss-health-bar {
    height: 100%;
    background: linear-gradient(90deg, #ff3b30, #ff5500);
    width: 100%;
    transition: width 0.2s ease;
    box-shadow: 0 0 10px rgba(255, 59, 48, 0.7);
}

/* ─── Boss Warning Alert Overlay ─── */
.boss-warning-alert {
    position: absolute;
    top: 35%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: rgba(15, 2, 2, 0.85);
    border: 2px solid var(--color-neon-red);
    box-shadow: 0 0 40px rgba(255, 59, 48, 0.6);
    border-radius: 16px;
    padding: 25px 45px;
    z-index: 7;
    text-align: center;
    pointer-events: none;
    animation: alertPulse 1s infinite alternate;
}

.boss-warning-alert.hidden {
    display: none !important;
}

@keyframes alertPulse {
    0% { transform: translate(-50%, -50%) scale(0.98); box-shadow: 0 0 20px rgba(255, 59, 48, 0.4); }
    100% { transform: translate(-50%, -50%) scale(1.02); box-shadow: 0 0 45px rgba(255, 59, 48, 0.8); }
}

.alert-flash {
    font-family: var(--font-cyber);
    font-size: 1.8rem;
    font-weight: 900;
    color: #ff3b30;
    letter-spacing: 3px;
    margin-bottom: 8px;
    text-shadow: 0 0 10px rgba(255, 59, 48, 0.8);
}

.alert-subtext {
    font-family: var(--font-cyber);
    font-size: 0.95rem;
    color: var(--color-text-main);
    letter-spacing: 1px;
}

/* Screen shake effect */
.shake-screen {
    animation: shake 0.2s;
    animation-iteration-count: infinite;
}

@keyframes shake {
    0% { transform: translate(1px, 1px) rotate(0deg); }
    10% { transform: translate(-1px, -2px) rotate(-1deg); }
    20% { transform: translate(-3px, 0px) rotate(1deg); }
    30% { transform: translate(0px, 2px) rotate(0deg); }
    40% { transform: translate(1px, -1px) rotate(1deg); }
    50% { transform: translate(-1px, 2px) rotate(-1deg); }
    60% { transform: translate(-3px, 1px) rotate(0deg); }
    70% { transform: translate(2px, 1px) rotate(-1deg); }
    80% { transform: translate(-1px, -1px) rotate(1deg); }
    90% { transform: translate(2px, 2px) rotate(0deg); }
    100% { transform: translate(1px, -2px) rotate(-1deg); }
}