:root {
    --bg-color: #f8fafc;
    --card-bg: rgba(255, 255, 255, 0.9);
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #3b82f6;
    --text-color: #0f172a;
    --text-muted: #64748b;
    --x-color: #ec4899;
    --o-color: #10b981;
    --tie-color: #f59e0b;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.06);
    --border: 1px solid rgba(0, 0, 0, 0.08);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Tajawal', sans-serif;
    transition: all 0.3s ease;
}

body {
    background-color: var(--bg-color);
    background-image: radial-gradient(circle at top left, rgba(99, 102, 241, 0.06), transparent),
                      radial-gradient(circle at bottom right, rgba(236, 72, 153, 0.06), transparent);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    overflow-x: hidden;
}

.container {
    width: 100%;
    max-width: 500px;
    display: flex;
    flex-direction: column;
    gap: 25px;
}

header {
    text-align: center;
}

header h1 {
    font-size: 2.5rem;
    font-weight: 900;
    letter-spacing: -1px;
    margin-bottom: 5px;
}

header h1 span {
    background: linear-gradient(135deg, var(--x-color), var(--o-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    color: var(--text-muted);
    font-size: 1.1rem;
}

/* بطاقة الإعدادات واللعب */
.card {
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: var(--border);
    border-radius: 20px;
    padding: 30px;
    box-shadow: var(--shadow);
    text-align: center;
}

.card h2 {
    font-size: 1.5rem;
    margin-bottom: 25px;
    font-weight: 700;
}

.control-group {
    margin-bottom: 25px;
    text-align: right;
}

.control-group label {
    display: block;
    font-size: 1rem;
    margin-bottom: 10px;
    font-weight: 500;
    color: var(--text-muted);
}

/* اختيار الرمز */
.symbol-selector {
    display: flex;
    gap: 15px;
}

.symbol-btn {
    flex: 1;
    background: rgba(0, 0, 0, 0.03);
    border: 2px solid transparent;
    color: var(--text-color);
    padding: 12px;
    border-radius: 12px;
    cursor: pointer;
    font-size: 1.1rem;
    font-weight: 700;
}

.symbol-btn:hover {
    background: rgba(0, 0, 0, 0.06);
}

.symbol-btn.active {
    background: rgba(99, 102, 241, 0.08);
    border-color: var(--primary-color);
    box-shadow: 0 0 15px rgba(99, 102, 241, 0.15);
}

/* اختيار القائمة المنسدلة */
.select-wrapper {
    position: relative;
    width: 100%;
}

select {
    width: 100%;
    padding: 14px 20px;
    background: rgba(0, 0, 0, 0.03);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: 12px;
    color: var(--text-color);
    font-size: 1.1rem;
    appearance: none;
    outline: none;
    cursor: pointer;
    font-weight: 500;
}

select:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 10px rgba(99, 102, 241, 0.15);
}

.select-wrapper::after {
    content: "▼";
    font-size: 0.8rem;
    position: absolute;
    top: 50%;
    left: 20px;
    transform: translateY(-50%);
    color: var(--text-muted);
    pointer-events: none;
}

/* الأزرار */
.primary-btn {
    width: 100%;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    color: #fff;
    padding: 15px 25px;
    font-size: 1.2rem;
    font-weight: 700;
    border-radius: 12px;
    cursor: pointer;
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.3);
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.45);
}

.primary-btn:active {
    transform: translateY(0);
}

.secondary-btn {
    background: rgba(0, 0, 0, 0.05);
    border: var(--border);
    color: var(--text-color);
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 700;
    border-radius: 12px;
    cursor: pointer;
}

.secondary-btn:hover {
    background: rgba(0, 0, 0, 0.1);
    transform: translateY(-2px);
}

.text-btn {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 0.95rem;
    text-decoration: underline;
    font-weight: 500;
}

.text-btn:hover {
    color: var(--text-color);
}

/* لوحة النتائج */
.scoreboard {
    display: flex;
    justify-content: space-between;
    gap: 15px;
    margin-bottom: 10px;
}

.score-card {
    flex: 1;
    background: rgba(0, 0, 0, 0.02);
    border: var(--border);
    border-radius: 15px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 5px;
}

.score-label {
    font-size: 0.9rem;
    color: var(--text-muted);
    font-weight: 500;
}

.score-value {
    font-size: 1.6rem;
    font-weight: 900;
}

.player-score {
    border-bottom: 4px solid var(--primary-color);
}

.ties {
    border-bottom: 4px solid var(--tie-color);
}

.ai-score {
    border-bottom: 4px solid var(--x-color);
}

/* معلومات الجولة */
.game-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: rgba(0, 0, 0, 0.02);
    border-radius: 12px;
    padding: 10px 15px;
    margin-bottom: 15px;
}

.difficulty-badge {
    font-size: 0.85rem;
    font-weight: 700;
    background: rgba(245, 158, 11, 0.1);
    color: var(--tie-color);
    padding: 5px 12px;
    border-radius: 20px;
    border: 1px solid rgba(245, 158, 11, 0.2);
}

.turn-indicator {
    font-weight: 700;
    font-size: 1rem;
    color: var(--text-color);
}

/* لوحة اللعب */
.board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
    gap: 15px;
    margin-bottom: 25px;
    aspect-ratio: 1/1;
}

.cell {
    background: #ffffff;
    border: var(--border);
    border-radius: 15px;
    cursor: pointer;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 3rem;
    font-weight: 900;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.03);
    position: relative;
    user-select: none;
}

.cell:hover {
    background: rgba(0, 0, 0, 0.02);
    transform: scale(1.02);
}

.cell.x {
    color: var(--x-color);
    text-shadow: 0 0 10px rgba(236, 72, 153, 0.15);
}

.cell.x::before {
    content: "X";
}

.cell.o {
    color: var(--o-color);
    text-shadow: 0 0 10px rgba(16, 185, 129, 0.15);
}

.cell.o::before {
    content: "O";
}

/* فائز مع التلوين */
.cell.winner {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff !important;
    text-shadow: 0 0 15px rgba(255, 255, 255, 0.6);
    animation: pulse 1s infinite alternate;
}

@keyframes pulse {
    0% { transform: scale(1); }
    100% { transform: scale(1.03); }
}

/* أزرار التحكم أثناء اللعب */
.game-controls {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
}

.game-controls .secondary-btn {
    width: 100%;
}

/* إخفاء العناصر */
.hidden {
    display: none !important;
}

/* المودال */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(15, 23, 42, 0.5);
    backdrop-filter: blur(8px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
}

.modal-content {
    background: var(--card-bg);
    border: var(--border);
    border-radius: 24px;
    padding: 35px;
    max-width: 400px;
    width: 90%;
    text-align: center;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
    animation: scaleUp 0.3s cubic-bezier(0.34, 1.56, 0.64, 1) forwards;
}

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

.modal h2 {
    font-size: 2rem;
    margin-bottom: 12px;
}

.modal p {
    color: var(--text-muted);
    font-size: 1.1rem;
    margin-bottom: 25px;
}

.modal-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* الاستجابة للهواتف المحمولة */
@media (max-width: 400px) {
    body {
        padding: 10px;
    }
    .card {
        padding: 20px;
    }
    .board {
        gap: 10px;
    }
    .cell {
        font-size: 2.5rem;
    }
}