/*
 * Tic Tac Toe - Enhanced Stylesheet
 * Theme: Hot Pink & Purple Gradient
 * 
 * COLOR PALETTE:
 * - Primary Purple: #8c52ff
 * - Primary Pink: #ff52eb
 * - Secondary Purple: #6b3fd4
 * - Secondary Pink: #c850c0
 * - Accent Green (winner): #4ade80
 * 
 * ANIMATIONS:
 * - Button hover transition: 0.3s ease
 * - Cell hover transition: 0.2s ease
 * - Win pulse animation: 0.5s ease-in-out
 * - Symbol placement: 0.3s ease-out
 */

@import url('https://fonts.googleapis.com/css2?family=Poppins&display=swap');

/* ============================================
 * Base Styles
 * ============================================ */

body {
    font-family: "Poppins", sans-serif;
    background: linear-gradient(135deg, #ff52eb 0%, #c850c0 50%, #8c52ff 100%);
    background-attachment: fixed;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    box-sizing: border-box;
}

section {
    text-align: center;
    border-radius: 24px;
    width: 90%;
    max-width: 420px;
    margin: auto;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 30px;
    box-shadow: 
        0 25px 50px -12px rgba(0, 0, 0, 0.25),
        0 0 0 1px rgba(255, 255, 255, 0.1);
}

/* ============================================
 * Title
 * ============================================ */

.game--title {
    padding-top: 10px;
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, #8c52ff, #ff52eb);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: 2px;
    margin-bottom: 20px;
}

/* ============================================
 * Game Grid Container
 * ============================================ */

.game--container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    width: fit-content;
    margin: 20px auto;
    padding: 15px;
    background: linear-gradient(145deg, #e0e0e0, #f5f5f5);
    border-radius: 16px;
    box-shadow: 
        inset 0 2px 10px rgba(0, 0, 0, 0.1),
        0 10px 30px rgba(140, 82, 255, 0.2);
}

/* ============================================
 * Cell Styles
 * ============================================ */

.cell {
    font-family: "Poppins", sans-serif;
    width: 70px;
    height: 70px;
    background: white;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    line-height: 70px;
    font-size: 28px;
    font-weight: 700;
    box-shadow: 
        0 4px 6px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
    transition: all 0.2s ease;
}

.cell:hover {
    background-color: rgba(140, 82, 255, 0.08);
    transform: translateY(-2px);
    box-shadow: 
        0 6px 12px rgba(140, 82, 255, 0.2),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.cell:focus {
    outline: 3px solid #8c52ff;
    outline-offset: 2px;
}

.cell:focus:not(:focus-visible) {
    outline: none;
}

.cell:focus-visible {
    outline: 3px solid #8c52ff;
    outline-offset: 2px;
}

/* X/O color differentiation */
.cell.x {
    color: #8c52ff;
    text-shadow: 0 2px 4px rgba(140, 82, 255, 0.3);
}

.cell.o {
    color: #ff52eb;
    text-shadow: 0 2px 4px rgba(255, 82, 235, 0.3);
}

/* Symbol placement animation */
.cell.x, .cell.o {
    animation: symbolPlaced 0.3s ease-out;
}

@keyframes symbolPlaced {
    0% { 
        transform: scale(0);
        opacity: 0;
    }
    50% {
        transform: scale(1.2);
    }
    100% { 
        transform: scale(1);
        opacity: 1;
    }
}

/* Winning cells highlighting */
.cell.winner {
    background: linear-gradient(145deg, #4ade80, #22c55e);
    color: white !important;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    animation: winPulse 0.5s ease-in-out 2;
}

@keyframes winPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.08); }
}

/* Disabled cell state (game ended) */
.cell.disabled {
    cursor: not-allowed;
    opacity: 0.8;
}

/* Draw state styling */
.cell.draw-state {
    background-color: rgba(150, 150, 150, 0.2);
}

/* ============================================
 * Button Styles
 * ============================================ */

button {
    margin: 8px 4px;
    height: auto;
    padding: 12px 24px;
    border: none;
    border-radius: 50px;
    color: #fff;
    font-family: "Poppins", sans-serif;
    font-weight: 600;
    font-size: 14px;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.game--restart {
    background: linear-gradient(135deg, #8c52ff, #6b3fd4);
}

.game--restart:hover {
    background: linear-gradient(135deg, #9d6aff, #8c52ff);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(140, 82, 255, 0.4);
}

.game--reset-scores {
    background: linear-gradient(135deg, #ff52eb, #d946c7);
}

.game--reset-scores:hover {
    background: linear-gradient(135deg, #ff6ef0, #ff52eb);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(255, 82, 235, 0.4);
}

button:active {
    transform: scale(0.95) translateY(0);
}

button:focus {
    outline: 3px solid #333;
    outline-offset: 2px;
}

/* ============================================
 * Game Status
 * ============================================ */

.game--status {
    font-size: 1.1rem;
    font-weight: 600;
    color: #333;
    padding: 12px 20px;
    background: linear-gradient(145deg, #f8f8f8, #ececec);
    border-radius: 12px;
    margin: 15px 0;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

/* Win message animation */
.game--status.win-message {
    background: linear-gradient(145deg, #dcfce7, #bbf7d0);
    color: #166534;
    animation: statusPop 0.6s ease;
}

/* Draw message animation */
.game--status.draw-message {
    background: linear-gradient(145deg, #fef3c7, #fde68a);
    color: #92400e;
    animation: statusShake 0.5s ease;
}

@keyframes statusPop {
    0% { transform: scale(1); }
    30% { transform: scale(1.1); }
    60% { transform: scale(0.95); }
    100% { transform: scale(1); }
}

@keyframes statusShake {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}

/* Button row layout */
.button-row {
    display: flex;
    justify-content: center;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 5px;
}

/* ============================================
 * Scoreboard Styles
 * ============================================ */

.scoreboard {
    display: flex;
    justify-content: space-around;
    margin: 15px 0;
    padding: 15px;
    background: linear-gradient(145deg, #f8f8f8, #ececec);
    border-radius: 16px;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.05);
}

.score {
    text-align: center;
    padding: 8px 15px;
}

.score-label {
    font-size: 0.75rem;
    font-weight: 600;
    color: #666;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.score span:last-child {
    display: block;
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(135deg, #8c52ff, #ff52eb);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    transition: transform 0.2s ease;
}

/* Score update animation */
.score-updated {
    animation: scoreUpdate 0.4s ease !important;
}

@keyframes scoreUpdate {
    0% { transform: scale(1); }
    50% { transform: scale(1.4); }
    100% { transform: scale(1); }
}

/* ============================================
 * Sound & Music Toggle Buttons
 * ============================================ */

.sound-toggle,
.music-toggle {
    background: linear-gradient(145deg, #f0f0f0, #e0e0e0);
    color: #333;
    width: 44px;
    height: 44px;
    padding: 0;
    font-size: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 
        0 2px 8px rgba(0, 0, 0, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.8);
}

.sound-toggle:hover,
.music-toggle:hover {
    background: linear-gradient(145deg, #f8f8f8, #e8e8e8);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

/* Music playing state - pulsing glow */
.music-toggle.music-playing {
    background: linear-gradient(145deg, #e8f5e9, #c8e6c9);
    animation: musicPulse 2s ease-in-out infinite;
}

@keyframes musicPulse {
    0%, 100% {
        box-shadow: 
            0 2px 8px rgba(76, 175, 80, 0.3),
            inset 0 1px 0 rgba(255, 255, 255, 0.8);
    }
    50% {
        box-shadow: 
            0 2px 15px rgba(76, 175, 80, 0.5),
            inset 0 1px 0 rgba(255, 255, 255, 0.8);
    }
}

/* ============================================
 * Accessibility: Screen Reader Styles
 * ============================================ */

/* Visually hidden but accessible to screen readers */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ============================================
 * Responsive Design
 * ============================================ */

@media (max-width: 480px) {
    section {
        padding: 20px 15px;
        border-radius: 20px;
    }
    
    .game--title {
        font-size: 1.6rem;
    }
    
    .cell {
        width: 60px;
        height: 60px;
        line-height: 60px;
        font-size: 24px;
        border-radius: 10px;
    }
    
    .game--container {
        gap: 6px;
        padding: 12px;
    }
    
    button {
        padding: 10px 20px;
        font-size: 13px;
    }
    
    .score span:last-child {
        font-size: 1.5rem;
    }
}

@media (max-width: 400px) {
    .cell {
        width: 55px;
        height: 55px;
        line-height: 55px;
        font-size: 22px;
    }
    
    .game--title {
        font-size: 1.5rem;
    }
    
    button {
        padding: 8px 18px;
    }
    
    section {
        padding: 15px;
    }
}

@media (max-width: 360px) {
    .cell {
        width: 50px;
        height: 50px;
        line-height: 50px;
        font-size: 20px;
    }
    
    .game--title {
        font-size: 1.4rem;
    }
    
    .scoreboard {
        padding: 10px;
    }
    
    .score {
        padding: 5px 8px;
    }
}

/* ============================================
 * Accessibility: Reduced Motion
 * ============================================ */

@media (prefers-reduced-motion: reduce) {
    .cell.winner {
        animation: none;
    }
    
    .cell.x, .cell.o {
        animation: none;
    }
    
    .game--status.win-message,
    .game--status.draw-message {
        animation: none;
    }
    
    .score-updated {
        animation: none !important;
    }
    
    button {
        transition: none;
    }
    
    .cell {
        transition: none;
    }
}