/**
 * base.css — CSS variables, reset, and base layout
 */

:root {
    /* ── Backgammon Neon Theme ──────────────────────────────────────────────── */
    --mc-back-color: var(--bg-point-light);
    --mc-back-glow: 0 0 8px var(--bg-point-light);
    --bg-bg: #0a0612;
    --bg-board-bg: #0d0820;
    --bg-point-light: #00f5ff;
    --bg-point-dark: #ff2d78;
    --bg-point-light-dim: rgba(0,245,255,0.3);
    --bg-point-dark-dim: rgba(255,45,120,0.3);
    --bg-checker-player: #00f5ff;
    --bg-checker-player-glow: rgba(0,245,255,0.6);
    --bg-checker-ai: #ff2d78;
    --bg-checker-ai-glow: rgba(255,45,120,0.6);
    --bg-bar-bg: #1a0a2a;
    --bg-off-bg: #0a0a1a;
    --bg-dice: #ffe03a;
    --bg-dice-glow: rgba(255,224,58,0.6);
    --bg-dice-dots: #0a0612;
    --bg-doubling: #ff7c1f;
    --bg-doubling-glow: rgba(255,124,31,0.6);
    --bg-highlight: #39ff6e;
    --bg-highlight-glow: rgba(57,255,110,0.5);
    --bg-text: #f0ead8;
    --bg-text-dim: #8a7fa8;
}

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

body {
    background: var(--bg-bg);
    color: var(--bg-text);
    font-family: 'Press Start 2P', monospace;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ── Container ──────────────────────────────────────────────────────────────── */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 60px 20px 40px;
}

/* ── Start Screen ───────────────────────────────────────────────────────────── */
.start-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 80vh;
    text-align: center;
}

.start-content {
    max-width: 500px;
}

.game-title {
    font-size: clamp(24px, 5vw, 40px);
    color: var(--bg-point-light);
    text-shadow: 0 0 20px var(--bg-checker-player-glow);
    margin-bottom: 20px;
    line-height: 1.3;
}

.game-subtitle {
    font-size: 10px;
    color: var(--bg-text-dim);
    margin-bottom: 30px;
    letter-spacing: 0.1em;
}

.start-divider {
    width: 100%;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--bg-point-light), transparent);
    margin: 20px 0;
}

.start-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 30px;
}

.start-btn {
    background: transparent;
    border: 2px solid var(--bg-point-light);
    color: var(--bg-point-light);
    font-family: 'Press Start 2P', monospace;
    font-size: 10px;
    padding: 12px 24px;
    cursor: pointer;
    transition: all 0.15s;
    letter-spacing: 0.05em;
}

.start-btn:hover {
    background: var(--bg-point-light);
    color: var(--bg-bg);
    box-shadow: 0 0 20px var(--bg-checker-player-glow);
}

.start-btn.primary {
    background: var(--bg-point-light);
    color: var(--bg-bg);
}

.start-btn.primary:hover {
    background: #ffffff;
    box-shadow: 0 0 30px var(--bg-checker-player-glow);
}

.start-footer {
    font-size: 8px;
    color: var(--bg-text-dim);
    line-height: 1.8;
}

/* ── Game Screen ────────────────────────────────────────────────────────────── */
.game-screen {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.game-header {
    text-align: center;
}

.game-header h1 {
    font-size: 16px;
    color: var(--bg-point-light);
    text-shadow: 0 0 10px var(--bg-checker-player-glow);
    margin-bottom: 10px;
}

.game-stats {
    display: flex;
    gap: 30px;
    justify-content: center;
}

.stat-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.stat-label {
    font-size: 8px;
    color: var(--bg-text-dim);
}

.stat-value {
    font-size: 14px;
    color: var(--bg-dice);
    text-shadow: 0 0 8px var(--bg-dice-glow);
}

/* ── Game Layout (Board + Chat) ────────────────────────────────────────────── */
.game-layout {
    display: flex;
    gap: 20px;
    width: 100%;
    max-width: 950px;
    justify-content: center;
    align-items: flex-start;
}

/* ── Game Chat ─────────────────────────────────────────────────────────────── */
.game-chat {
    width: 220px;
    min-width: 180px;
    background: var(--bg-board-bg);
    border: 1px solid rgba(0,245,255,0.3);
    border-radius: 4px;
    display: flex;
    flex-direction: column;
    font-family: 'Press Start 2P', monospace;
    max-height: 500px;
}

.game-chat .chat-header {
    font-size: 9px;
    color: var(--bg-point-light);
    padding: 10px;
    border-bottom: 1px solid rgba(0,245,255,0.2);
    text-align: center;
}

.game-chat .chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
    font-size: 8px;
    line-height: 1.6;
    color: var(--bg-text);
    max-height: 400px;
}

.game-chat .chat-msg {
    margin-bottom: 4px;
    word-wrap: break-word;
}

.game-chat .chat-msg .chat-name {
    font-weight: bold;
}

.game-chat .chat-msg.system {
    color: var(--bg-text-dim);
    font-style: italic;
}

.game-chat .chat-input {
    display: flex;
    gap: 4px;
    padding: 8px;
    border-top: 1px solid rgba(0,245,255,0.2);
}

.game-chat .chat-input input {
    flex: 1;
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.15);
    color: var(--bg-text);
    font-family: 'Press Start 2P', monospace;
    font-size: 8px;
    padding: 6px;
    border-radius: 2px;
    min-width: 0;
}

.game-chat .chat-input input::placeholder {
    color: rgba(255,255,255,0.2);
}

.game-chat .chat-input input:focus {
    outline: none;
    border-color: var(--bg-highlight);
}

.game-chat .chat-input button {
    background: var(--bg-highlight);
    color: var(--bg-bg);
    border: none;
    font-family: 'Press Start 2P', monospace;
    font-size: 8px;
    padding: 6px 10px;
    cursor: pointer;
    border-radius: 2px;
    white-space: nowrap;
}

.game-chat .chat-input button:hover {
    background: #fff;
}

/* ── Chat Tabs ─────────────────────────────────────────────────────────────── */
.chat-tabs {
    display: flex;
    border-bottom: 1px solid rgba(0,245,255,0.2);
}

.chat-tab {
    flex: 1;
    background: none;
    border: none;
    color: var(--bg-text-dim);
    font-family: 'Press Start 2P', monospace;
    font-size: 8px;
    padding: 8px;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    transition: color 0.2s, border-color 0.2s;
}

.chat-tab.active {
    color: var(--bg-highlight);
    border-bottom-color: var(--bg-highlight);
}

.chat-tab:hover {
    color: var(--bg-text);
}

/* ── Chat Header with User Count ───────────────────────────────────────────── */
.game-chat .chat-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.chat-user-count {
    font-size: 7px;
    color: var(--bg-text-dim);
}

/* ── Chat User List ────────────────────────────────────────────────────────── */
.chat-users {
    padding: 4px 8px;
    border-top: 1px solid rgba(0,245,255,0.2);
    max-height: 80px;
    overflow-y: auto;
}

.chat-users-header {
    font-size: 7px;
    color: var(--bg-text-dim);
    margin-bottom: 4px;
}

.chat-user {
    font-size: 8px;
    color: var(--bg-text);
    padding: 2px 0;
    display: flex;
    align-items: center;
    gap: 6px;
}

.chat-user-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    display: inline-block;
}

/* ── Chat Typing Indicator ─────────────────────────────────────────────────── */
.chat-typing {
    font-size: 7px;
    color: var(--bg-text-dim);
    padding: 4px 8px;
    font-style: italic;
}

/* ── Chat Name Row ─────────────────────────────────────────────────────────── */
.chat-name-row {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 4px 8px;
    border-bottom: 1px solid rgba(0,245,255,0.2);
}

.chat-my-name {
    font-size: 9px;
    color: var(--bg-highlight);
}

.chat-edit-name {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 10px;
    padding: 2px;
}

.chat-edit-name:hover {
    opacity: 0.7;
}

.chat-name-input {
    background: rgba(255,255,255,0.05);
    border: 1px solid var(--bg-highlight);
    color: var(--bg-text);
    font-family: 'Press Start 2P', monospace;
    font-size: 9px;
    padding: 2px 4px;
    border-radius: 2px;
    width: 100px;
    max-width: 100px;
}

.chat-name-input:focus {
    outline: none;
    border-color: var(--bg-highlight);
}

/* ── Chat Color Picker ────────────────────────────────────────────────────── */
.chat-pick-color {
    background: none;
    border: none;
    cursor: pointer;
    font-size: 10px;
    padding: 2px;
}

.chat-pick-color:hover {
    opacity: 0.7;
}

.color-picker-popup {
    position: absolute;
    right: 0;
    top: 100%;
    background: var(--bg-board-bg);
    border: 1px solid rgba(0,245,255,0.3);
    border-radius: 4px;
    padding: 8px;
    z-index: 100;
    min-width: 180px;
}

.color-strip {
    width: 100%;
    height: 20px;
    border-radius: 3px;
    cursor: crosshair;
    position: relative;
    margin-bottom: 8px;
}

.color-indicator {
    position: absolute;
    top: -3px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    border: 2px solid #fff;
    background: transparent;
    pointer-events: none;
    box-shadow: 0 0 4px rgba(0,0,0,0.5);
}

.color-preview-row {
    display: flex;
    align-items: center;
    gap: 6px;
}

.color-preview-label {
    font-size: 7px;
    color: var(--bg-text-dim);
}

.color-preview {
    width: 16px;
    height: 16px;
    border-radius: 3px;
    border: 1px solid rgba(255,255,255,0.2);
}

.color-reset-btn {
    background: none;
    border: 1px solid var(--bg-text-dim);
    color: var(--bg-text-dim);
    font-family: 'Press Start 2P', monospace;
    font-size: 6px;
    padding: 2px 6px;
    cursor: pointer;
    border-radius: 2px;
    margin-left: auto;
}

.color-reset-btn:hover {
    border-color: var(--bg-highlight);
    color: var(--bg-highlight);
}

.chat-user-status {
    font-size: 7px;
    color: var(--bg-text-dim);
    margin-left: 4px;
}

/* ── Chat Online Users Panel ───────────────────────────────────────────────── */
.chat-online {
    flex: 1;
    overflow-y: auto;
    padding: 8px;
}

.chat-online-user {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 6px 0;
    border-bottom: 1px solid rgba(0,245,255,0.05);
}

.chat-online-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.chat-online-name {
    font-size: 9px;
    color: var(--bg-text);
}

.chat-online-status {
    font-size: 7px;
    color: var(--bg-text-dim);
    margin-left: auto;
}

/* ── Board Area ─────────────────────────────────────────────────────────────── */
.board-area {
    position: relative;
    width: 100%;
    max-width: 700px;
}

/* ── Message Area ───────────────────────────────────────────────────────────── */
.message-area {
    text-align: center;
    min-height: 30px;
}

.game-message {
    font-size: 10px;
    color: var(--bg-highlight);
    text-shadow: 0 0 8px var(--bg-highlight-glow);
}

.game-message.warning {
    color: var(--bg-dice);
    text-shadow: 0 0 8px var(--bg-dice-glow);
}

/* ── Controls ───────────────────────────────────────────────────────────────── */
.game-controls {
    display: flex;
    gap: 12px;
    justify-content: center;
}

.control-btn {
    background: transparent;
    border: 1px solid var(--bg-text-dim);
    color: var(--bg-text-dim);
    font-family: 'Press Start 2P', monospace;
    font-size: 8px;
    padding: 8px 16px;
    cursor: pointer;
    transition: all 0.15s;
}

.control-btn:hover {
    border-color: var(--bg-point-light);
    color: var(--bg-point-light);
}

/* ── CRT Scanlines ──────────────────────────────────────────────────────────── */
.scanlines {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 9999;
    background: repeating-linear-gradient(
        0deg,
        rgba(0, 0, 0, 0.15) 0px,
        rgba(0, 0, 0, 0.15) 1px,
        transparent 1px,
        transparent 3px
    );
}

/* ── Animations ─────────────────────────────────────────────────────────────── */
@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

@keyframes glow {
    0%, 100% { filter: drop-shadow(0 0 4px var(--glow-color)); }
    50% { filter: drop-shadow(0 0 12px var(--glow-color)); }
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-20px); }
    to { opacity: 1; transform: translateX(0); }
}