@import url('../styles.css');

/* ---- Keyframes ---- */
@keyframes drawX1 {
    from { stroke-dashoffset: 100; }
    to   { stroke-dashoffset: 0; }
}
@keyframes drawX2 {
    0%   { stroke-dashoffset: 100; opacity: 0; }
    30%  { opacity: 1; }
    100% { stroke-dashoffset: 0; }
}
@keyframes drawO {
    from { stroke-dashoffset: 220; }
    to   { stroke-dashoffset: 0; }
}
@keyframes winLineGrow {
    from { transform: rotate(var(--win-angle, 0deg)) scaleX(0); }
    to   { transform: rotate(var(--win-angle, 0deg)) scaleX(1); }
}
@keyframes cellExit {
    0%   { transform: scale(1); opacity: 1; }
    100% { transform: scale(0); opacity: 0; }
}
@keyframes drawFlash {
    0%   { background: rgba(255,255,255,0.15); }
    25%  { background: rgba(255,160,0,0.45); box-shadow: 0 0 24px rgba(255,160,0,0.4); }
    75%  { background: rgba(255,200,0,0.3); }
    100% { background: rgba(255,255,255,0.15); }
}
@keyframes scoreBump {
    0%   { transform: scale(1); }
    45%  { transform: scale(1.6); color: #ffd54f; }
    100% { transform: scale(1); }
}
@keyframes thinkingPulse {
    0%, 100% { opacity: 1; }
    50%       { opacity: 0.4; }
}
@keyframes turnGlow {
    0%, 100% { color: #8fd3f4; }
    50%       { color: #fff; text-shadow: 0 0 8px #8fd3f4; }
}

/* ---- Layout ---- */
.mobile-score {
    display: none;
    position: absolute;
    top: 5px;
    right: 5px;
    z-index: 1002;
    background: rgba(36,36,36,0.85);
    color: var(--text-muted);
    font-size: 0.8rem;
    padding: 0.7rem 1.2rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    font-weight: bold;
}

.responsive-layout {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: flex-start;
    gap: 2.5rem;
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
    box-sizing: border-box;
}
.game-side {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
}
.info-side {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    min-width: 280px;
    max-width: 400px;
    background: rgba(36,36,36,0.85);
    border-radius: 18px;
    box-shadow: 0 8px 32px rgba(0,0,0,0.25);
    padding: 2rem;
}
.info-side h1 {
    font-size: 2.2rem;
    margin-bottom: 1rem;
    background: var(--grad-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}
.info-side p {
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    color: var(--text-muted);
    text-shadow: 0 2px 8px #222;
}
.buttons-panel {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}
@media (max-width: 900px) {
    .responsive-layout {
        flex-direction: column;
        align-items: center;
        gap: 1.5rem;
        padding: 1rem 0.5rem;
    }
    .info-side {
        max-width: 100vw;
        width: 100%;
        margin-top: 0;
        align-items: center;
        text-align: center;
    }
    .info-side h1 { font-size: 1.7rem; }
    .game-side { width: 100%; justify-content: center; }
}

body {
    background: var(--grad-bg);
    color: #fff;
    min-height: 100vh;
    margin: 0;
}

/* ---- AI difficulty selector ---- */
.ai-diff-wrap {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: 1.2rem;
    flex-wrap: wrap;
}
.ai-diff-label {
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: bold;
    margin-right: 0.2rem;
}
.ai-diff-btn {
    padding: 0.4rem 1rem;
    border: 2px solid rgba(255,255,255,0.25);
    border-radius: 8px;
    background: rgba(255,255,255,0.08);
    color: #ccc;
    font-size: 0.9rem;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s, color 0.2s, transform 0.15s;
}
.ai-diff-btn:hover {
    background: rgba(255,255,255,0.18);
    color: #fff;
    border-color: rgba(255,255,255,0.5);
    transform: scale(1.05);
}
.ai-diff-btn.active {
    background: var(--grad-primary);
    border-color: transparent;
    color: #222;
}

/* ---- Score panel ---- */
.score-panel {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
    margin-bottom: 0.8rem;
}
.score-panel span {
    color: var(--text-muted);
    font-size: 0.95rem;
}
.score-panel span span {
    display: inline-block;
    font-weight: bold;
    color: #8fd3f4;
    transition: color 0.3s;
}
.score-bump {
    animation: scoreBump 400ms ease-out;
}

/* ---- Board ---- */
.ttt-board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    grid-template-rows: repeat(3, 1fr);
    gap: 0;
    border-radius: 20px;
    padding: 0;
    width: 360px;
    height: 360px;
    box-sizing: border-box;
    position: relative;
    background: transparent;
    /* Stylized grid lines via pseudo-elements on individual cells */
    transition: background 0.3s, box-shadow 0.3s;
    overflow: hidden;
}

/* Draw flash effect */
.ttt-board.draw-flash {
    animation: drawFlash 600ms ease;
}

/* Board background glow */
.ttt-board::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 20px;
    background: radial-gradient(ellipse at 50% 50%, rgba(143,211,244,0.08) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

/* ---- Cells ---- */
.ttt-cell {
    background: rgba(255,255,255,0.07);
    border-radius: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0;  /* text hidden; SVG used instead */
    font-weight: bold;
    cursor: pointer;
    touch-action: manipulation;
    user-select: none;
    transition: background 0.15s, transform 0.15s, opacity 0.15s;
    position: relative;
    z-index: 1;
    /* Grid line effect via gradient borders */
    outline: none;
    box-shadow:
        1px 0 0 0 rgba(255,255,255,0.18),
        0 1px 0 0 rgba(255,255,255,0.18),
        1px 1px 0 0 rgba(255,255,255,0.18);
}

/* Remove double borders on edges */
.ttt-cell:nth-child(3)  { box-shadow: 0 1px 0 0 rgba(255,255,255,0.18); }
.ttt-cell:nth-child(6)  { box-shadow: 0 1px 0 0 rgba(255,255,255,0.18); }
.ttt-cell:nth-child(9)  { box-shadow: none; }
.ttt-cell:nth-child(7)  { box-shadow: 1px 0 0 0 rgba(255,255,255,0.18); }
.ttt-cell:nth-child(8)  { box-shadow: 1px 0 0 0 rgba(255,255,255,0.18); }

.ttt-cell:hover {
    background: rgba(255,255,255,0.13);
}

/* Hover ghost X preview */
.ttt-cell.hover-x:not(.x):not(.o):empty::after {
    content: '';
    position: absolute;
    inset: 18%;
    background:
        linear-gradient(45deg, transparent 40%, #ff512f 40%, #ff512f 60%, transparent 60%),
        linear-gradient(-45deg, transparent 40%, #ff512f 40%, #ff512f 60%, transparent 60%);
    opacity: 0.18;
    pointer-events: none;
    border-radius: 4px;
}
/* Hover ghost O preview */
.ttt-cell.hover-o:not(.x):not(.o):empty::after {
    content: '';
    position: absolute;
    inset: 22%;
    border-radius: 50%;
    border: 6px solid #8fd3f4;
    opacity: 0.18;
    pointer-events: none;
    box-sizing: border-box;
}

/* Winner highlight */
.ttt-cell.winner {
    background: rgba(255,255,255,0.22);
    box-shadow: inset 0 0 20px rgba(143,211,244,0.3), 1px 0 0 0 rgba(255,255,255,0.18), 0 1px 0 0 rgba(255,255,255,0.18);
}

/* Cell exit animation (reset) */
.ttt-cell.cell-exit {
    animation: cellExit 180ms ease-in forwards;
}

/* ---- SVG pieces ---- */
.piece-svg {
    width: 68%;
    height: 68%;
    display: block;
    overflow: visible;
}

/* X lines */
.x-svg .x-line1,
.x-svg .x-line2 {
    stroke: #ff512f;
    stroke-width: 10;
    stroke-linecap: round;
    fill: none;
    stroke-dasharray: 100;
}
.x-svg .x-line1 {
    stroke-dashoffset: 0;
    animation: drawX1 280ms ease-out both;
}
.x-svg .x-line2 {
    stroke-dashoffset: 0;
    animation: drawX2 280ms ease-out 80ms both;
}

/* O circle */
.o-svg .o-circle {
    stroke: #8fd3f4;
    stroke-width: 9;
    fill: none;
    stroke-dasharray: 220;
    stroke-dashoffset: 0;
    animation: drawO 320ms ease-out both;
    stroke-linecap: round;
}

/* ---- Win line ---- */
.win-line {
    position: absolute;
    height: 6px;
    border-radius: 3px;
    background: linear-gradient(90deg, #ffd54f, #ff512f);
    box-shadow: 0 0 12px rgba(255,213,79,0.6);
    transform-origin: left center;
    top: 0; left: 0;
    animation: winLineGrow 400ms cubic-bezier(0.22,1,0.36,1) forwards;
    z-index: 10;
    pointer-events: none;
}

/* ---- Status message ---- */
#statusMsg {
    font-size: 1.15rem;
    margin-top: 1rem;
    min-height: 1.5em;
    text-align: center;
    font-weight: bold;
    letter-spacing: 0.02em;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}
#statusMsg.thinking {
    color: #ffd54f;
    animation: thinkingPulse 0.8s ease-in-out infinite;
}
#statusMsg.thinking::before {
    content: '';
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #ffd54f;
    animation: thinkingPulse 0.8s ease-in-out infinite;
}
#statusMsg.your-turn {
    color: #8fd3f4;
    animation: turnGlow 2s ease-in-out infinite;
}
#statusMsg.your-turn::before {
    content: '';
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: #8fd3f4;
    box-shadow: 0 0 6px #8fd3f4;
}

/* ---- Buttons ---- */
#startBtn, #restartBtn {
    background: var(--grad-primary);
    color: #222;
    border: none;
    border-radius: 8px;
    padding: 0.9rem 2rem;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    margin: 0 0.5rem;
    box-shadow: 0 2px 8px rgba(0,0,0,0.15);
    transition: background 0.2s, transform 0.2s;
}
#startBtn:hover, #restartBtn:hover { opacity: 0.9; transform: scale(1.05); }
#startBtn:disabled, #restartBtn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }

#playAgainBtn {
    background: #8fd3f4;
    color: #222;
    border: none;
    border-radius: 8px;
    padding: 1rem 2.2rem;
    font-size: 1.2rem;
    font-weight: bold;
    cursor: pointer;
    transition: background 0.2s;
    margin-top: 1rem;
}
#playAgainBtn:hover { background: #5ec2e6; }

.popup {
    position: fixed;
    top: 0; left: 0;
    width: 100vw; height: 100vh;
    background: rgba(24,24,24,0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
}
.popup-content {
    background: #242424;
    padding: 2.5rem 3rem;
    border-radius: 20px;
    box-shadow: 0 4px 24px rgba(0,0,0,0.4);
    text-align: center;
    min-width: 280px;
    max-width: 90vw;
}
.popup-content h2 { margin-top: 0; color: #8fd3f4; font-size: 2rem; }
.popup-content p { font-size: 1.5rem; margin: 1.5rem 0; }

/* ---- Mobile adjustments ---- */
@media (max-width: 900px) {
    .ttt-board {
        width: min(85vw, 360px);
        height: min(85vw, 360px);
    }
    .piece-svg { width: 60%; height: 60%; }
}