/* Standalone Othello Style Sheet */

:root {
    --color-bg-base: #070913;
    --color-bg-surface: rgba(15, 23, 42, 0.65);
    --color-border: rgba(255, 255, 255, 0.08);
    --color-primary: #6366f1;
    --color-secondary: #06b6d4;
    --color-accent: #f43f5e;
    --color-emerald: #10b981;
    
    --color-slate-100: #f1f5f9;
    --color-slate-300: #cbd5e1;
    --color-slate-400: #94a3b8;
    --color-slate-800: #1e293b;
    
    --font-heading: 'Outfit', 'Sarabun', sans-serif;
    --font-body: 'Inter', 'Sarabun', sans-serif;
    --glass-blur: blur(20px);
    --glow-shadow-primary: 0 0 20px rgba(99, 102, 241, 0.35);
    --glow-shadow-secondary: 0 0 20px rgba(6, 182, 212, 0.35);
    --glow-shadow-accent: 0 0 20px rgba(244, 63, 94, 0.35);
    --card-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    --transition-smooth: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

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

body {
    background-color: var(--color-bg-base);
    color: var(--color-slate-100);
    font-family: var(--font-body);
    min-height: 100vh;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.bg-glow {
    position: fixed;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.1) 0%, rgba(0,0,0,0) 70%);
    top: 30%;
    left: 40%;
    z-index: -1;
}

/* Container Wrapper */
.game-container-wrapper {
    width: 100%;
    max-width: 1000px;
    height: 85vh;
    min-height: 500px;
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    backdrop-filter: var(--glass-blur);
    border-radius: 28px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.5);
    display: flex;
    overflow: hidden;
}

/* Sidebar Styling */
.game-sidebar {
    width: 280px;
    background: rgba(10, 16, 32, 0.6);
    border-right: 1px solid var(--color-border);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    flex-shrink: 0;
}

.back-btn {
    align-self: flex-start;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--color-border);
    color: var(--color-slate-300);
    padding: 0.5rem 0.9rem;
    border-radius: 10px;
    font-family: var(--font-heading);
    font-weight: 500;
    font-size: 0.85rem;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition-smooth);
}

.back-btn:hover {
    background: rgba(255,255,255,0.1);
    color: var(--color-slate-100);
    transform: translateX(-3px);
}

.game-info-panel h2 {
    font-family: var(--font-heading);
    font-size: 1.5rem;
    font-weight: 700;
    color: #FFFFFF;
    margin-bottom: 0.5rem;
    background: linear-gradient(90deg, #FFFFFF, var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.game-description-short {
    font-size: 0.8rem;
    color: var(--color-slate-400);
    line-height: 1.4;
}

.game-status-card, .game-config-card {
    background: rgba(30, 41, 59, 0.4);
    border: 1px solid var(--color-border);
    border-radius: 16px;
    padding: 1.25rem;
}

.status-label, .config-label {
    font-family: var(--font-heading);
    font-size: 0.8rem;
    color: var(--color-secondary);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin-bottom: 0.75rem;
}

.turn-indicator {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-weight: 600;
    font-size: 1.05rem;
    margin-bottom: 0.75rem;
}

.turn-dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background-color: var(--color-emerald);
    box-shadow: 0 0 8px var(--color-emerald);
    transition: var(--transition-smooth);
}

/* Scores display styling */
.game-score-display {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-top: 0.5rem;
    font-family: var(--font-heading);
}

.score-row {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    color: var(--color-slate-300);
    padding: 0.25rem 0;
    border-bottom: 1px dashed rgba(255,255,255,0.05);
}

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

.score-value {
    font-weight: 700;
    color: #FFFFFF;
}

.config-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.config-group:last-child {
    margin-bottom: 0;
}

.config-group label {
    font-size: 0.75rem;
    color: var(--color-slate-400);
}

.toggle-group {
    display: grid;
    grid-template-columns: 1fr 1fr;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--color-border);
    border-radius: 8px;
    padding: 2px;
}

.toggle-option {
    background: transparent;
    border: none;
    color: var(--color-slate-400);
    font-family: var(--font-heading);
    font-size: 0.75rem;
    font-weight: 600;
    padding: 0.4rem;
    border-radius: 6px;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.toggle-option.active {
    background: var(--color-primary);
    color: #FFFFFF;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
}

.styled-select {
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--color-border);
    color: var(--color-slate-100);
    font-family: var(--font-body);
    font-size: 0.8rem;
    padding: 0.45rem;
    border-radius: 8px;
    outline: none;
    cursor: pointer;
    width: 100%;
}

.styled-select option {
    background-color: var(--color-slate-800);
}

.game-actions {
    margin-top: auto;
}

.reset-btn {
    width: 100%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: rgba(244, 63, 94, 0.1);
    border: 1px solid rgba(244, 63, 94, 0.2);
    color: var(--color-accent);
    padding: 0.75rem 1rem;
    border-radius: 12px;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.9rem;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.reset-btn:hover {
    background: var(--color-accent);
    color: #FFFFFF;
    border-color: transparent;
    box-shadow: var(--glow-shadow-accent);
}

/* Viewport Board */
.game-viewport {
    flex-grow: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    overflow: auto;
}

.board-container {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Reversi / Othello Board Styling */
.othello-board {
    background: #0f5132;
    border: 6px solid #146c43;
    border-radius: 12px;
    padding: 4px;
    display: grid;
    grid-template-columns: repeat(8, 38px);
    grid-template-rows: repeat(8, 38px);
    gap: 2px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.4);
}

@media (min-width: 500px) {
    .othello-board {
        grid-template-columns: repeat(8, 44px);
        grid-template-rows: repeat(8, 44px);
    }
}

@media (min-width: 650px) {
    .othello-board {
        grid-template-columns: repeat(8, 52px);
        grid-template-rows: repeat(8, 52px);
    }
}

.othello-cell {
    background: #198754;
    position: relative;
    cursor: pointer;
    box-shadow: inset 0 0 4px rgba(0,0,0,0.15);
}

.othello-cell:hover {
    background: #20c997;
}

/* Valid move highlight */
.othello-cell.valid-move::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.6);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% { transform: translate(-50%, -50%) scale(0.95); opacity: 0.6; }
    50% { transform: translate(-50%, -50%) scale(1.2); opacity: 1; }
    100% { transform: translate(-50%, -50%) scale(0.95); opacity: 0.6; }
}

.othello-piece-wrapper {
    width: 86%;
    height: 86%;
    position: absolute;
    top: 7%;
    left: 7%;
    perspective: 1000px;
}

.othello-piece {
    width: 100%;
    height: 100%;
    position: relative;
    transform-style: preserve-3d;
    transition: transform 0.6s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.othello-piece.black {
    transform: rotateY(0deg);
}

.othello-piece.white {
    transform: rotateY(180deg);
}

.othello-disc-face {
    position: absolute;
    width: 100%;
    height: 100%;
    border-radius: 50%;
    backface-visibility: hidden;
    box-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.othello-disc-face.black-face {
    background: radial-gradient(circle at 35% 35%, #3d4454, #121824);
    border: 1.5px solid #2d3748;
}

.othello-disc-face.white-face {
    background: radial-gradient(circle at 35% 35%, #ffffff, #e2e8f0);
    border: 1.5px solid #cbd5e1;
    transform: rotateY(180deg);
}

.hidden {
    display: none !important;
}

/* Result Modal */
.result-modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease-out;
}

.result-modal:not(.hidden) {
    opacity: 1;
    pointer-events: auto;
}

.result-modal::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(3, 7, 18, 0.85);
    backdrop-filter: blur(8px);
    z-index: -1;
}

.result-modal-content {
    background: rgba(15, 23, 42, 0.85);
    border: 1px solid var(--color-border);
    backdrop-filter: var(--glass-blur);
    border-radius: 24px;
    padding: 2.5rem 2rem;
    width: 100%;
    max-width: 400px;
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8);
}

.result-effect-bg {
    position: absolute;
    top: -50px;
    left: -50px;
    width: 200px;
    height: 200px;
    background: radial-gradient(circle, rgba(16, 185, 129, 0.15) 0%, rgba(0,0,0,0) 70%);
    z-index: 0;
}

.result-icon-wrapper {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    margin: 0 auto 1.5rem auto;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(99, 102, 241, 0.1);
    color: var(--color-primary);
    position: relative;
    z-index: 1;
}

.result-icon-wrapper.win {
    background: rgba(16, 185, 129, 0.1);
    color: var(--color-emerald);
}

.result-icon-wrapper.lose {
    background: rgba(244, 63, 94, 0.1);
    color: var(--color-accent);
}

.result-modal h2 {
    font-family: var(--font-heading);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 0.75rem;
    position: relative;
    z-index: 1;
}

.result-modal p {
    font-size: 0.95rem;
    color: var(--color-slate-400);
    margin-bottom: 2rem;
    position: relative;
    z-index: 1;
}

.result-actions {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    position: relative;
    z-index: 1;
}

.primary-btn {
    background: linear-gradient(135deg, var(--color-primary) 0%, var(--color-secondary) 100%);
    border: none;
    color: #FFFFFF;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 1rem;
    padding: 0.85rem;
    border-radius: 12px;
    cursor: pointer;
    box-shadow: var(--glow-shadow-primary);
    transition: var(--transition-smooth);
}

.primary-btn:hover {
    transform: translateY(-2px) scale(1.01);
}

.secondary-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    color: var(--color-slate-300);
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    padding: 0.85rem;
    border-radius: 12px;
    cursor: pointer;
    text-decoration: none;
    display: block;
    transition: var(--transition-smooth);
}

.secondary-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #FFFFFF;
}

@media (max-width: 768px) {
    .game-container-wrapper {
        flex-direction: column;
        height: 90vh;
    }
    .game-sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--color-border);
        padding: 1.25rem;
        flex-direction: row;
        flex-wrap: wrap;
        align-items: center;
        gap: 1rem;
    }
    .game-description-short { display: none; }
    .game-actions { margin-top: 0; }
    .game-score-display { flex-direction: row; gap: 1rem; margin-top: 0; }
    .score-row { border-bottom: none; gap: 0.5rem; }
}