/* potential.css - Potential Chess Engine Interface */

:root {
    --glass-bg: rgba(18, 18, 22, 0.4);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-blur: blur(12px);
    
    --accent-blue: #58a6ff; /* Muted GitHub blue */
    --accent-blue-soft: rgba(88, 166, 255, 0.15);
    --accent-green: #238636;
    --accent-red: #f85149;
    
    --timer-font: 'Inter', 'Roboto Mono', monospace;
    --border-radius: 6px;
}

/* Page Background Overrides */
body.chess-page {
    background-color: #0d1117;
    color: var(--text-primary);
    min-height: 100vh;
}

/* Layout Overhaul */
.potential-main {
    padding-top: 100px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    overflow-x: hidden;
}

.chess-container {
    display: grid;
    grid-template-columns: 40px 630px 350px;
    justify-content: center;
    gap: 30px;
    max-width: 1400px;
    margin: 0 auto;
}

/* Evaluation Bar - Vertical Thin */
.eval-column {
    display: flex;
    align-items: center;
    height: 750px;
}

.eval-bar-wrapper {
    width: 35px;
    height: 600px;
    background: #000;
    border-radius: var(--border-radius);
    overflow: hidden;
    position: relative;
    border: 1px solid var(--glass-border);
}

.eval-fill {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 50%;
    background: #fff;
    transition: height 0.6s cubic-bezier(0.23, 1, 0.32, 1);
}

.eval-text {
    position: absolute;
    width: 100%;
    text-align: center;
    font-family: var(--timer-font);
    font-weight: 700;
    font-size: 0.8rem;
    z-index: 10;
    pointer-events: none;
    mix-blend-mode: difference;
    color: #fff;
    left: 0;
}

.eval-text.at-top { transform: translateY(10px); }
.eval-text.at-bottom { transform: translateY(575px); }

/* Board Styling */
.board-column {
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 15px;
    height: 750px;
}

.board-wrapper {
    background: var(--glass-bg);
    padding: 15px;
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border);
    backdrop-filter: var(--glass-blur);
}

.chessboard {
    width: 600px;
    max-width: 100%;
    margin: 0 auto;
    border: 1px solid #30363d;
}

.chessboard * {
    box-sizing: content-box !important;
}

/* Player Info & Clocks */
.player-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 16px;
    background: var(--glass-bg);
    border-radius: var(--border-radius);
    border: 1px solid var(--glass-border);
    backdrop-filter: var(--glass-blur);
    color: var(--text-secondary);
}

.player-meta {
    position: relative;
    display: flex;
    align-items: center;
}

.player-name {
    font-family: var(--font-heading);
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.thinking-indicator {
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 100%;
    height: 2px;
    background: var(--accent-green);
    transform: scaleX(0);
    transform-origin: left;
    transition: transform 0.3s ease;
}

.thinking-indicator:not(.hidden) {
    transform: scaleX(1);
}

.clock {
    font-family: var(--timer-font);
    font-size: 1.5rem;
    color: var(--text-secondary);
    padding: 2px 4px;
    min-width: 100px;
    text-align: right;
    transition: all 0.2s ease;
    border-bottom: 2px solid transparent;
}

.clock.active {
    color: var(--text-primary);
    border-bottom-color: var(--accent-blue);
    font-weight: 600;
}

.clock.low-time {
    color: var(--accent-red);
}

/* Info Column Panels */
.info-column {
    display: flex;
    flex-direction: column;
    justify-content: center;
    height: 750px;
    width: 350px;
}

.panel-card {
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    backdrop-filter: var(--glass-blur);
    border-radius: var(--border-radius);
    padding: 20px;
    margin-bottom: 12px;
    flex-shrink: 0;
    backface-visibility: hidden;
    transform: translateZ(0);
}

.panel-title {
    font-family: var(--font-heading);
    font-size: 0.9rem;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Time Control Selection */
.time-control-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 8px;
    margin-bottom: 12px;
}

.tc-btn {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--glass-border);
    color: var(--text-secondary);
    padding: 8px;
    border-radius: 4px;
    cursor: pointer;
    transition: all 0.15s ease;
    font-size: 0.85rem;
    font-family: var(--timer-font);
}

.tc-btn:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-primary);
}

.tc-btn.active {
    background: var(--accent-blue-soft);
    border-color: rgba(88, 166, 255, 0.4);
    color: var(--text-primary);
    font-weight: 500;
}

/* History List */
.history-panel {
    height: 300px;
    margin-bottom: 0;
}

.history-list {
    height: 230px;
    overflow-y: auto;
    font-family: var(--timer-font);
    font-size: 0.85rem;
    display: grid;
    grid-template-columns: 35px 1fr 1fr;
    gap: 4px;
    align-content: start;
    padding-right: 8px;
    scrollbar-gutter: stable;
}

.history-index { color: var(--text-secondary); opacity: 0.6; }
.history-move {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.03);
    padding: 2px 8px;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.15s ease;
}
.history-move:hover {
    background: rgba(255, 255, 255, 0.08);
    color: var(--accent-blue);
}

/* PV Analysis Panel */
.pv-analysis-panel {
    text-align: center;
}

.pv-board-container {
    width: 150px;
    height: 150px;
    margin: 0 auto 12px auto;
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid var(--glass-border);
    position: relative;
}

#pv-board {
    width: 150px !important;
    height: 150px !important;
}

.pv-move-list {
    font-family: var(--timer-font);
    font-size: 0.75rem;
    color: var(--text-secondary);
    max-height: 80px;
    overflow-y: auto;
    display: grid;
    grid-template-columns: 28px 1fr 1fr;
    gap: 3px;
    text-align: left;
    padding: 0 4px;
    scrollbar-gutter: stable;
}

.pv-move {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.03);
    padding: 1px 5px;
    border-radius: 3px;
}

/* Utility */
.w-full { width: 100%; }
.mt-2 { margin-top: 0.5rem; }
.mt-4 { margin-top: 1rem; }
.hidden { display: none !important; }

/* Modal */
.modal-overlay {
    background: rgba(8, 8, 10, 0.9);
    backdrop-filter: blur(4px);
}

.modal.card {
    background: #0d1117;
    border: 1px solid var(--glass-border);
    border-radius: var(--border-radius);
    padding: 40px;
}

.modal-title {
    font-family: var(--font-heading);
    color: var(--text-primary);
    font-weight: 700;
}

/* Scrollbar */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: rgba(255, 255, 255, 0.1); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.2); }

/* Responsive */
@media (max-width: 1100px) {
    .chess-container {
        grid-template-columns: 1fr;
        padding: 100px 1.5rem;
    }
    .eval-column { display: none; }
    .potential-main { display: block; height: auto; }
    .board-column, .info-column { height: auto; width: 100%; }
    .chessboard { width: 100%; max-width: 600px; }
}