/* ======================================================
   Королевская Битва -- Medieval Fantasy Checkers 3D
   Stylesheet (Inter + Red gradient buttons)
   ====================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;600;700;800;900&display=swap');

/* ---------- Reset & Base ---------- */
*,
*::before,
*::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

/* ── Loading Screen ──────────────────────────────────────────────── */
#loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 999999;
    background: #0195d7;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.5s ease;
}

#loading-screen.fade-out {
    opacity: 0;
    pointer-events: none;
}

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

.loading-spinner {
    width: 75px;
    height: 75px;
    margin: 0 auto 16px;
    border: 4px solid rgba(212, 175, 55, 0.2);
    border-top-color: #00ff1f;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

:root {
    --red-start: #EF4444;
    --red-end: #991B1B;
    --red-hover-start: #F87171;
    --red-hover-end: #B91C1C;
    --red-secondary-start: #991B1B;
    --red-secondary-end: #450A0A;
    --gold: #F0C850;
    --gold-dark: #8B6914;
    --dark-bg: #0A0A12;
    --panel-bg: rgba(10, 10, 20, 0.88);
    --panel-border: rgba(90, 74, 56, 0.6);
    --card-bg: linear-gradient(135deg, #3d3025, #2a2018);
    --card-border: #5a4a38;
    --text-primary: #F5F5F4;
    --text-secondary: #CCCCCC;
    --text-dim: #888;
    --white-piece: #F0E6D0;
    --black-piece: #2C2C3E;
    --victory-green: #22C55E;
    --defeat-red: #EF4444;
    --font: 'Inter', sans-serif;
}

html,
body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    background: var(--dark-bg);
    color: var(--text-primary);
    font-family: var(--font);
    user-select: none;
    -webkit-user-select: none;
    -webkit-touch-callout: none;
    touch-action: none;
    overscroll-behavior: none;
}

/* ---------- Canvas Container ---------- */
#canvas-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--dark-bg);
    visibility: hidden;
}

#canvas-container canvas {
    display: block;
}

/* ---------- UI Wrapper ---------- */
#ui-layer {
    position: fixed;
    top: 50%;
    left: 50%;
    width: 1280px;
    height: 720px;
    transform: translate(-50%, -50%);
    transform-origin: center center;
    pointer-events: none;
    z-index: 10;
    overflow: hidden;
    /* Hide anything that spills out of 16:9 safe zone */
}

/* ---------- UI Screens (overlay on canvas) ---------- */
.ui-screen {
    position: absolute;
    /* changed from fixed */
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background-image: linear-gradient(rgba(10, 8, 6, 0.3), rgba(10, 8, 6, 0.8)), url('img/menubg.webp');
    background-size: cover;
    background-position: center;
    transition: opacity 0.4s ease;
    pointer-events: auto;
    /* enable interactions inside ui screens */
}

.ui-screen.hidden {
    display: none;
    opacity: 0;
    pointer-events: none;
}

.menu-content {
    position: relative;
    width: 100%;
    height: 100%;
}

.menu-logo {
    position: absolute;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    width: 350px;
    max-width: 80%;
    filter: drop-shadow(0 15px 25px rgba(0, 0, 0, 0.7));
    animation: floatLogo 4s ease-in-out infinite;
    pointer-events: none;
}

@keyframes floatLogo {

    0%,
    100% {
        transform: translate(-50%, 0);
    }

    50% {
        transform: translate(-50%, -15px);
    }
}

.play-standalone-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    margin-top: 50px;
    font-size: 1.5rem;
    padding: 16px 40px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8);
    animation: pulseBtn 2s infinite;
}

@keyframes pulseBtn {
    0% {
        box-shadow: 0 0 0 0 rgba(76, 175, 80, 0.5);
    }

    70% {
        box-shadow: 0 0 0 15px rgba(76, 175, 80, 0);
    }

    100% {
        box-shadow: 0 0 0 0 rgba(76, 175, 80, 0);
    }
}

.version-text {
    margin-top: 30px;
    font-size: 0.7rem;
    color: var(--text-dim);
    letter-spacing: 2px;
}

/* ---------- Buttons ---------- */
.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 14px;
    align-items: center;
}

.btn {
    font-family: var(--font);
    font-size: 22px;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    border: 3px solid #000000;
    border-radius: 14px;
    cursor: pointer;
    padding: 16px 50px;
    min-width: 260px;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
    text-align: center;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(180deg, var(--red-start), var(--red-end));
    color: #FFFFFF;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.9);
    box-shadow: 0 4px 15px rgba(239, 68, 68, 0.4);
}

.btn-primary:hover {
    background: linear-gradient(180deg, var(--red-hover-start), var(--red-hover-end));
    box-shadow: 0 6px 20px rgba(239, 68, 68, 0.6);
}

.btn-primary:active {
    box-shadow: 0 2px 8px rgba(239, 68, 68, 0.3);
}

.btn-secondary {
    background: linear-gradient(180deg, var(--red-secondary-start), var(--red-secondary-end));
    color: #FFFFFF;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.9);
    padding: 14px 40px;
    font-size: 18px;
}

.btn-secondary:hover {
    background: linear-gradient(180deg, #B91C1C, #7F1D1D);
}

.btn-danger {
    background: linear-gradient(180deg, var(--red-start), var(--red-end));
    color: #FFFFFF;
    border: 3px solid #000000;
    padding: 10px 16px;
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 14px;
    min-width: auto;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.9);
    box-shadow: 0 4px 12px rgba(239, 68, 68, 0.3);
}

.btn-danger:hover {
    background: linear-gradient(180deg, var(--red-hover-start), var(--red-hover-end));
    box-shadow: 0 6px 18px rgba(239, 68, 68, 0.5);
}

/* ---------- Level Select ---------- */
.select-panel {
    text-align: center;
    padding: 40px 30px;
    background: var(--card-bg);
    border: 1.5px solid var(--card-border);
    border-radius: 20px;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
    max-width: 700px;
    width: 95%;
}

.select-title {
    font-size: 1.6rem;
    font-weight: 900;
    color: #FFFFFF;
    text-shadow: 0 4px 15px rgba(0, 0, 0, 0.8);
    margin-bottom: 30px;
    letter-spacing: 1px;
}

.opponents-grid {
    display: flex;
    flex-wrap: nowrap;
    gap: 12px;
    justify-content: center;
    margin-bottom: 24px;
}

.opponent-card {
    width: 120px;
    padding: 18px 10px 14px;
    background: var(--card-bg);
    border: 1.5px solid var(--card-border);
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.opponent-card:hover {
    border-color: rgba(240, 200, 80, 0.6);
    background: rgba(255, 255, 255, 0.08);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
}

.opponent-card .card-roman {
    margin: 0 auto 10px;
    font-size: 2.2rem;
    font-weight: 900;
    color: #FFFFFF;
    text-shadow: 2px 2px 5px rgba(0, 0, 0, 0.8), 0 0 10px rgba(255, 255, 255, 0.3);
    display: flex;
    align-items: center;
    justify-content: center;
}

.opponent-card .card-name {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
    line-height: 1.2;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.8);
}

.opponent-card .card-rank {
    font-size: 0.65rem;
    color: var(--text-secondary);
    letter-spacing: 1px;
    text-transform: uppercase;
    font-weight: 600;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.6);
}

/* ---------- Game HUD ---------- */
#game-hud {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

#game-hud.hidden {
    display: none;
}

#game-hud>* {
    pointer-events: auto;
}

.hud-top-center {
    position: absolute;
    top: 16px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.opponent-badge {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(42, 32, 24, 0.9);
    padding: 6px 16px;
    border: 1.5px solid var(--card-border);
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
}

.badge-icon {
    font-size: 1.2rem;
    border: 2px solid var(--gold);
    background: rgba(0, 0, 0, 0.3);
}

.badge-info {
    display: flex;
    flex-direction: column;
}

.badge-name {
    font-size: 0.9rem;
    font-weight: 800;
    color: #FFFFFF;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.8);
}

.badge-title {
    font-size: 0.65rem;
    color: var(--text-secondary);
    letter-spacing: 1px;
    text-transform: uppercase;
    font-weight: 600;
}

.quote-bubble {
    max-width: 380px;
    padding: 10px 18px;
    background: rgba(42, 32, 24, 0.92);
    border: 1.5px solid var(--card-border);
    border-radius: 12px;
    font-size: 0.8rem;
    color: var(--text-secondary);
    font-style: italic;
    text-align: center;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.6);
    transition: opacity 0.3s ease;
    animation: quoteFadeIn 0.3s ease;
}

.quote-bubble.hidden {
    display: none;
}

@keyframes quoteFadeIn {
    from {
        opacity: 0;
        transform: translateY(-5px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hud-top-right {
    position: absolute;
    top: 16px;
    right: 16px;
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 8px 18px;
    background: rgba(42, 32, 24, 0.9);
    border: 1.5px solid var(--card-border);
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
}

.hud-bottom-left {
    position: absolute;
    bottom: 16px;
    left: 16px;
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 8px 18px;
    background: rgba(42, 32, 24, 0.9);
    border: 1.5px solid var(--card-border);
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.5);
}

.turn-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    transform-origin: left center;
}

@keyframes turnPulseScale {
    0% {
        transform: scale(1);
    }

    50% {
        transform: scale(1.3);
    }

    100% {
        transform: scale(1);
    }
}

.turn-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--white-piece);
    box-shadow: 0 0 8px rgba(240, 230, 208, 0.5);
    transition: background 0.3s, box-shadow 0.3s;
}

.turn-indicator.player-turn .turn-dot {
    background: #2ecc71 !important;
    box-shadow: 0 0 10px rgba(46, 204, 113, 0.8) !important;
    animation: turnPulseScale 1.5s infinite ease-in-out;
}

.turn-dot.enemy {
    background: var(--defeat-red);
    box-shadow: 0 0 8px rgba(239, 68, 68, 0.5);
}

#turn-text {
    font-size: 0.85rem;
    font-weight: 700;
    color: #FFFFFF;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.8);
    transition: color 0.3s, text-shadow 0.3s;
}

.piece-counter {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 1.5rem;
    font-weight: 800;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.6);
}

.counter-white {
    color: #2ecc71;
    text-shadow: 0 0 8px rgba(46, 204, 113, 0.6);
}

.counter-separator {
    color: var(--text-dim);
}

.counter-black {
    color: #e74c3c;
    text-shadow: 0 0 8px rgba(231, 76, 60, 0.6);
}

.hud-menu-btn {
    position: absolute;
    top: 16px;
    left: 16px;
    width: 46px;
    height: 46px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 12px;
}

/* ---------- Game Over Overlay ---------- */
.ui-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(10, 8, 6, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    animation: overlayFadeIn 0.4s ease;
    pointer-events: auto;
}

.ui-overlay.hidden {
    display: none;
}

@keyframes overlayFadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

.gameover-panel {
    text-align: center;
    padding: 50px 60px;
    background: var(--card-bg);
    border: 1.5px solid var(--card-border);
    border-radius: 20px;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.5);
    max-width: 440px;
    width: 90%;
    animation: slideUp 0.4s ease-out;
}

@keyframes slideUp {
    from {
        transform: translateY(40px);
        opacity: 0;
    }

    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.gameover-emblem {
    width: 64px;
    height: 64px;
    margin: 0 auto 20px;
    border-radius: 50%;
    border: 3px solid var(--gold);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    background: rgba(0, 0, 0, 0.3);
}

.gameover-title {
    font-size: 2rem;
    font-weight: 900;
    margin-bottom: 12px;
    letter-spacing: 2px;
}

.gameover-title.victory {
    color: var(--victory-green);
    text-shadow: 0 0 20px rgba(34, 197, 94, 0.3), 2px 2px 4px rgba(0, 0, 0, 0.8);
}

.gameover-title.defeat {
    color: var(--defeat-red);
    text-shadow: 0 0 20px rgba(239, 68, 68, 0.3), 2px 2px 4px rgba(0, 0, 0, 0.8);
}

.gameover-message {
    font-size: 1rem;
    font-weight: 700;
    color: #FFFFFF;
    text-shadow: 0 4px 10px rgba(0, 0, 0, 0.8);
    margin-bottom: 30px;
    line-height: 1.5;
}

.gameover-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
    align-items: center;
}