/* =========================================================
ECDS GAMES ENGINE — Core Design System v2.0
Mobile-first | EC Digital Services
========================================================= */

/* --- DESIGN TOKENS --- */
:root {
    --ecds-primary:      #4f46e5;
    --ecds-primary-h:    #3730a3;
    --ecds-secondary:    #06b6d4;
    --ecds-success:      #10b981;
    --ecds-warning:      #f59e0b;
    --ecds-danger:       #ef4444;
    --ecds-surface:      #ffffff;
    --ecds-bg:           #f8fafc;
    --ecds-border:       #e2e8f0;
    --ecds-border-dark:  #cbd5e1;
    --ecds-text:         #1e293b;
    --ecds-text-muted:   #64748b;
    --ecds-radius:       12px;
    --ecds-radius-sm:    8px;
    --ecds-shadow:       0 1px 3px rgba(0,0,0,.08), 0 4px 16px rgba(0,0,0,.06);
    --ecds-shadow-lg:    0 8px 32px rgba(0,0,0,.12), 0 2px 8px rgba(0,0,0,.06);
    --ecds-font:         'Segoe UI', system-ui, -apple-system, sans-serif;
    --ecds-font-mono:    'Courier New', monospace;
}

/* --- SHELL WRAPPER --- */
.ecds-game-shell {
    position: relative;
    max-width: 960px;
    margin: 0 auto 40px;
    background: var(--ecds-surface);
    border: 1px solid var(--ecds-border);
    border-radius: var(--ecds-radius);
    box-shadow: var(--ecds-shadow);
    font-family: var(--ecds-font);
    color: var(--ecds-text);
    overflow: visible;
}

/* --- GAME HEADER --- */
.ecds-shell-header {
    padding: 20px 24px 16px;
    border-bottom: 1px solid var(--ecds-border);
    background: linear-gradient(135deg, #f0f4ff 0%, #fafafa 100%);
    border-radius: var(--ecds-radius) var(--ecds-radius) 0 0;
}

.ecds-game-title {
    margin: 0 0 14px;
    font-size: clamp(20px, 4vw, 28px);
    font-weight: 700;
    color: var(--ecds-text);
    letter-spacing: -0.3px;
}

.ecds-shell-toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 12px;
}

.ecds-toolbar-group {
    display: flex;
    align-items: center;
    gap: 8px;
}

.ecds-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--ecds-text-muted);
    text-transform: uppercase;
    letter-spacing: .5px;
    white-space: nowrap;
}

/* --- DIFFICULTY BUTTONS --- */
.ecds-diff-btns {
    display: flex;
    border: 1px solid var(--ecds-border-dark);
    border-radius: var(--ecds-radius-sm);
    overflow: hidden;
}

.ecds-diff-btn {
    padding: 6px 14px;
    font-size: 13px;
    font-weight: 600;
    border: none;
    background: transparent;
    color: var(--ecds-text-muted);
    cursor: pointer;
    transition: background .15s, color .15s;
    border-right: 1px solid var(--ecds-border-dark);
}

.ecds-diff-btn:last-child { border-right: none; }

.ecds-diff-btn:hover {
    background: #f1f5f9;
    color: var(--ecds-text);
}

.ecds-diff-btn.active {
    background: var(--ecds-primary);
    color: #fff;
}

/* easy/medium/hard color accents when active */
.ecds-diff-btn[data-level="easy"].active   { background: var(--ecds-success); }
.ecds-diff-btn[data-level="medium"].active { background: var(--ecds-warning); }
.ecds-diff-btn[data-level="hard"].active   { background: var(--ecds-danger); }

/* --- BUTTONS --- */
.ecds-btn-primary,
.ecds-btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 20px;
    font-size: 14px;
    font-weight: 700;
    border: none;
    border-radius: var(--ecds-radius-sm);
    cursor: pointer;
    transition: transform .12s, box-shadow .12s, background .15s;
    white-space: nowrap;
    letter-spacing: .2px;
}

.ecds-btn-primary {
    background: var(--ecds-primary);
    color: #fff;
    box-shadow: 0 2px 8px rgba(79,70,229,.3);
}

.ecds-btn-primary:hover {
    background: var(--ecds-primary-h);
    transform: translateY(-1px);
    box-shadow: 0 4px 14px rgba(79,70,229,.4);
}

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

.ecds-btn-secondary {
    background: #f1f5f9;
    color: var(--ecds-text);
    border: 1px solid var(--ecds-border-dark);
}

.ecds-btn-secondary:hover { background: #e2e8f0; }

/* --- TIMER --- */
.ecds-timer-group { margin-left: auto; }

.ecds-timer-display {
    font-size: 22px;
    font-weight: 800;
    font-variant-numeric: tabular-nums;
    color: var(--ecds-primary);
    letter-spacing: 1px;
    min-width: 60px;
    display: inline-block;
}

/* --- GAME AREA --- */
.ecds-game-area {
    padding: 24px;
}

@media (max-width: 600px) {
    .ecds-shell-header { padding: 16px 16px 12px; }
    .ecds-game-area    { padding: 16px; }
    .ecds-timer-group  { margin-left: 0; width: 100%; }
}

/* --- COMPLETION OVERLAY --- */
.ecds-complete-overlay {
    position: absolute;
    inset: 0;
    background: rgba(15,23,42,.65);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    border-radius: var(--ecds-radius);
    animation: ecdsOverlayIn .25s ease;
}

@keyframes ecdsOverlayIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

.ecds-complete-card {
    background: var(--ecds-surface);
    border-radius: 16px;
    padding: 36px 40px;
    max-width: 400px;
    width: 90%;
    text-align: center;
    box-shadow: var(--ecds-shadow-lg);
    animation: ecdsCardIn .3s cubic-bezier(.34,1.56,.64,1);
}

@keyframes ecdsCardIn {
    from { opacity: 0; transform: scale(.85) translateY(20px); }
    to   { opacity: 1; transform: scale(1) translateY(0); }
}

.ecds-complete-emoji { font-size: 56px; line-height: 1; margin-bottom: 12px; }

.ecds-complete-title {
    margin: 0 0 6px;
    font-size: 26px;
    font-weight: 800;
    color: var(--ecds-text);
}

.ecds-complete-time {
    margin: 0 0 20px;
    font-size: 16px;
    color: var(--ecds-text-muted);
}

.ecds-complete-time strong { color: var(--ecds-primary); font-size: 20px; }

.ecds-name-entry p { margin: 0 0 10px; font-size: 14px; color: var(--ecds-text-muted); }

.ecds-player-name {
    width: 100%;
    padding: 10px 14px;
    font-size: 15px;
    border: 1.5px solid var(--ecds-border-dark);
    border-radius: var(--ecds-radius-sm);
    margin-bottom: 12px;
    box-sizing: border-box;
    outline: none;
    transition: border-color .15s;
}

.ecds-player-name:focus { border-color: var(--ecds-primary); }

.ecds-submit-score { width: 100%; margin-bottom: 8px; padding: 11px; font-size: 15px; }

/* --- LEADERBOARD (overlay) --- */
.ecds-leaderboard-wrap {
    margin: 16px 0 20px;
    text-align: left;
}

.ecds-leaderboard-wrap h4 {
    font-size: 15px;
    font-weight: 700;
    margin: 0 0 10px;
    color: var(--ecds-text);
}

.ecds-leaderboard-list,
.ecds-lb-inline-list {
    list-style: none;
    margin: 0;
    padding: 0;
}

.ecds-leaderboard-list li,
.ecds-lb-inline-list li {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 7px 10px;
    border-radius: 6px;
    font-size: 14px;
    transition: background .1s;
}

.ecds-leaderboard-list li:nth-child(odd),
.ecds-lb-inline-list li:nth-child(odd) { background: #f8fafc; }

.ecds-lb-rank  { font-size: 16px; width: 28px; flex-shrink: 0; }
.ecds-lb-name  { flex: 1; font-weight: 600; color: var(--ecds-text); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.ecds-lb-time  { font-weight: 700; color: var(--ecds-primary); font-variant-numeric: tabular-nums; }
.ecds-lb-empty { color: var(--ecds-text-muted); font-style: italic; }

.ecds-play-again { width: 100%; }

/* --- LEADERBOARD SIDEBAR --- */
.ecds-lb-sidebar {
    position: absolute;
    top: 70px;
    right: -52px;
    z-index: 50;
}

@media (max-width: 1060px) {
    .ecds-lb-sidebar { display: none; }
}

.ecds-lb-toggle {
    width: 42px;
    height: 42px;
    border-radius: 50%;
    background: var(--ecds-primary);
    color: #fff;
    font-size: 18px;
    border: none;
    cursor: pointer;
    box-shadow: var(--ecds-shadow);
    transition: background .15s, transform .15s;
}

.ecds-lb-toggle:hover, .ecds-lb-toggle.active { background: var(--ecds-primary-h); transform: scale(1.08); }

.ecds-lb-panel {
    position: absolute;
    right: 0;
    top: 50px;
    width: 240px;
    background: var(--ecds-surface);
    border: 1px solid var(--ecds-border);
    border-radius: var(--ecds-radius);
    box-shadow: var(--ecds-shadow-lg);
    padding: 16px;
}

.ecds-lb-panel h4 { margin: 0 0 12px; font-size: 15px; font-weight: 700; }

.ecds-lb-tabs {
    display: flex;
    gap: 4px;
    margin-bottom: 12px;
}

.ecds-lb-tab {
    flex: 1;
    padding: 5px 4px;
    font-size: 12px;
    font-weight: 600;
    border: 1px solid var(--ecds-border-dark);
    border-radius: 6px;
    background: transparent;
    cursor: pointer;
    color: var(--ecds-text-muted);
    transition: background .15s, color .15s;
}

.ecds-lb-tab.active, .ecds-lb-tab:hover {
    background: var(--ecds-primary);
    color: #fff;
    border-color: var(--ecds-primary);
}

/* --- MOBILE OVERLAY --- */
@media (max-width: 600px) {
    .ecds-complete-overlay {
        align-items: flex-start;
        padding: 20px 12px;
        overflow-y: auto;
    }
    .ecds-complete-card {
        padding: 24px 20px;
        margin-top: 20px;
    }
    .ecds-complete-emoji { font-size: 40px; }
    .ecds-complete-title { font-size: 20px; }
}