/* Tetris — dark theme, dependency-free. */

:root {
    --bg-0: #060a16;
    --bg-1: #0d1430;
    --bg-2: #131c42;
    --panel-bg: rgba(10, 16, 36, 0.78);
    --panel-border: rgba(120, 160, 255, 0.22);
    --text: #e8ecf8;
    --text-dim: #8b96b8;
    --accent: #4d8dff;
    --accent-hot: #ff3d57;
    --gold: #ffd600;
    --pv-cell: 16px;

    /* Per-tetromino colors — keep in sync with COLORS in js/game.js. */
    --piece-i: #00e5ff;
    --piece-o: #ffd600;
    --piece-t: #b44cf0;
    --piece-s: #00e676;
    --piece-z: #ff3d57;
    --piece-j: #3d7bff;
    --piece-l: #ff9100;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    background: var(--bg-0);
    color: var(--text);
    font-family: "Segoe UI", system-ui, -apple-system, sans-serif;
    overflow: hidden;
}

#app, .app-shell {
    height: 100%;
}

h1, h2, h3 {
    margin: 0;
    font-weight: 700;
}

button {
    font-family: inherit;
}

/* ---------- Boot / loading screen ---------- */

.boot-screen {
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.2rem;
    background: linear-gradient(160deg, var(--bg-0) 0%, var(--bg-1) 55%, var(--bg-2) 100%);
}

.boot-logo {
    font-size: 3rem;
    font-weight: 800;
    letter-spacing: 0.5em;
    padding-left: 0.5em; /* balance letter-spacing */
    background: linear-gradient(90deg, var(--piece-i), var(--piece-j), var(--piece-t), var(--piece-z), var(--piece-l), var(--piece-o), var(--piece-s));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.boot-bar {
    width: min(320px, 70vw);
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.08);
    overflow: hidden;
}

.boot-bar-fill {
    height: 100%;
    width: var(--blazor-load-percentage, 0%);
    background: linear-gradient(90deg, var(--accent), var(--piece-i));
    transition: width 0.2s ease;
}

.boot-text {
    color: var(--text-dim);
    font-size: 0.9rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
}

/* ---------- Game page layout ---------- */

.game-root {
    position: relative;
    height: 100%;
    overflow: hidden;
    background: linear-gradient(160deg, var(--bg-0) 0%, var(--bg-1) 55%, var(--bg-2) 100%);
}

.bg-layer {
    position: absolute;
    inset: 0;
    background-size: cover;
    background-position: center;
    z-index: 0;
}

.bg-layer.has-image::after {
    content: "";
    position: absolute;
    inset: 0;
    background: rgba(4, 7, 16, 0.55); /* dim images so the playfield stays readable */
}

.game-layout {
    position: relative;
    z-index: 1;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: clamp(0.5rem, 2vw, 1.5rem);
    padding: 1rem;
}

.playfield-wrap {
    position: relative;
    height: min(94vh, 94svh);
    aspect-ratio: 1 / 2; /* 10 × 20 visible board */
    max-width: 46vw;
}

.game-canvas {
    display: block;
    width: 100%;
    height: 100%;
}

/* ---------- Side panels ---------- */

.side-panel {
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
    width: clamp(140px, 16vw, 220px);
}

.panel-box {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: 10px;
    padding: 0.7rem 0.9rem;
    backdrop-filter: blur(6px);
}

.panel-title {
    font-size: 0.75rem;
    letter-spacing: 0.25em;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 0.5rem;
}

.hold-box .piece-preview {
    margin: 0.25rem auto;
}

.hold-locked .piece-preview {
    opacity: 0.35;
    filter: grayscale(0.7);
}

.next-queue {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
    align-items: center;
}

.next-slot {
    opacity: 0.75;
    transform: scale(0.9);
}

.next-slot.next-first {
    opacity: 1;
    transform: scale(1);
}

/* ---------- Piece previews ---------- */

.piece-preview {
    display: grid;
    gap: 2px;
    justify-content: center;
    align-content: center;
    min-height: calc(var(--pv-cell) * 2 + 2px);
}

.piece-preview-empty {
    min-width: calc(var(--pv-cell) * 4);
    border: 1px dashed rgba(255, 255, 255, 0.12);
    border-radius: 6px;
}

.pv-cell {
    width: var(--pv-cell);
    height: var(--pv-cell);
    border-radius: 3px;
    box-shadow: inset 0 2px 2px rgba(255, 255, 255, 0.25), inset 0 -2px 2px rgba(0, 0, 0, 0.3);
}

.pv-1 { background: var(--piece-i); }
.pv-2 { background: var(--piece-o); }
.pv-3 { background: var(--piece-t); }
.pv-4 { background: var(--piece-s); }
.pv-5 { background: var(--piece-z); }
.pv-6 { background: var(--piece-j); }
.pv-7 { background: var(--piece-l); }

/* ---------- HUD ---------- */

.hud-stats, .final-stats {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.3rem 0.8rem;
    margin: 0;
}

.hud-stats dt, .final-stats dt {
    color: var(--text-dim);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    align-self: baseline;
}

.hud-stats dd, .final-stats dd {
    margin: 0;
    text-align: right;
    font-variant-numeric: tabular-nums;
    font-weight: 600;
}

.hud-score {
    font-size: 1.15rem;
    color: var(--gold);
}

/* ---------- Toasts & badges ---------- */

.action-toast {
    position: absolute;
    top: 18%;
    left: 50%;
    transform: translateX(-50%);
    padding: 0.4rem 1.2rem;
    border-radius: 8px;
    background: rgba(8, 12, 28, 0.85);
    border: 1px solid var(--panel-border);
    font-size: clamp(1rem, 2.2vw, 1.5rem);
    font-weight: 800;
    letter-spacing: 0.08em;
    color: var(--gold);
    white-space: nowrap;
    pointer-events: none;
    animation: toast-pop 1.8s ease forwards;
}

@keyframes toast-pop {
    0%   { opacity: 0; transform: translateX(-50%) scale(0.6); }
    12%  { opacity: 1; transform: translateX(-50%) scale(1.08); }
    20%  { transform: translateX(-50%) scale(1); }
    75%  { opacity: 1; }
    100% { opacity: 0; transform: translateX(-50%) translateY(-14px) scale(0.95); }
}

.badge-stack {
    position: absolute;
    bottom: 4%;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    gap: 0.5rem;
    pointer-events: none;
}

.badge {
    padding: 0.2rem 0.7rem;
    border-radius: 999px;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    white-space: nowrap;
}

.b2b-badge {
    background: rgba(255, 214, 0, 0.15);
    border: 1px solid var(--gold);
    color: var(--gold);
}

.combo-badge {
    background: rgba(255, 61, 87, 0.15);
    border: 1px solid var(--accent-hot);
    color: var(--accent-hot);
}

/* ---------- Overlays & dialogs ---------- */

.overlay {
    position: absolute;
    inset: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(3, 5, 12, 0.7);
    backdrop-filter: blur(4px);
}

.dialog {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    border-radius: 14px;
    padding: 1.6rem 2rem;
    max-height: 92vh;
    overflow-y: auto;
    box-shadow: 0 18px 60px rgba(0, 0, 0, 0.6);
}

.menu-dialog {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.1rem;
    min-width: min(360px, 90vw);
    text-align: center;
}

.menu-dialog.wide {
    min-width: min(520px, 94vw);
}

.game-title {
    font-size: 2.6rem;
    font-weight: 800;
    letter-spacing: 0.4em;
    padding-left: 0.4em;
    background: linear-gradient(90deg, var(--piece-i), var(--piece-j), var(--piece-t), var(--piece-z), var(--piece-l), var(--piece-o), var(--piece-s));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.press-any-key {
    margin: 0;
    color: var(--text-dim);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    font-size: 0.85rem;
    animation: blink 1.6s ease-in-out infinite;
}

@keyframes blink {
    50% { opacity: 0.35; }
}

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 0.55rem;
    width: 100%;
    max-width: 260px;
}

.menu-btn {
    display: block;
    width: 100%;
    padding: 0.6rem 1.2rem;
    border-radius: 8px;
    border: 1px solid var(--panel-border);
    background: rgba(255, 255, 255, 0.05);
    color: var(--text);
    font-size: 0.95rem;
    font-weight: 600;
    letter-spacing: 0.05em;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s ease, border-color 0.15s ease, transform 0.05s ease;
}

.menu-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent);
}

.menu-btn:active {
    transform: scale(0.98);
}

.menu-btn.primary {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
}

.menu-btn.primary:hover {
    background: #66a0ff;
}

.menu-btn.subtle {
    width: auto;
    padding: 0.35rem 0.9rem;
    font-size: 0.8rem;
}

.menu-btn:disabled {
    opacity: 0.45;
    cursor: default;
}

.icon-btn {
    background: none;
    border: none;
    color: var(--text-dim);
    font-size: 1.1rem;
    cursor: pointer;
    padding: 0.2rem 0.5rem;
    border-radius: 6px;
}

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

/* ---------- Key list / help ---------- */

.key-list {
    list-style: none;
    margin: 0;
    padding: 0;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    font-size: 0.85rem;
}

.key-list li {
    display: flex;
    justify-content: space-between;
    gap: 1rem;
}

.key-list.compact {
    font-size: 0.72rem;
    gap: 0.2rem;
}

.key-action {
    color: var(--text-dim);
}

.key-keys {
    font-weight: 600;
    font-variant-numeric: tabular-nums;
}

.help-panel {
    max-width: 340px;
    text-align: left;
    color: var(--text-dim);
    font-size: 0.9rem;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.help-panel p {
    margin: 0;
}

.controls-box {
    display: none;
}

@media (min-height: 700px) {
    .controls-box {
        display: block;
    }
}

/* ---------- Game over ---------- */

.final-stats {
    width: 100%;
    max-width: 340px;
}

.name-entry {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    align-items: center;
    width: 100%;
}

.highscore-callout {
    margin: 0;
    color: var(--gold);
    font-weight: 700;
    letter-spacing: 0.05em;
}

.name-input {
    width: 100%;
    max-width: 260px;
    padding: 0.55rem 0.8rem;
    border-radius: 8px;
    border: 1px solid var(--panel-border);
    background: rgba(0, 0, 0, 0.35);
    color: var(--text);
    font-size: 1rem;
    text-align: center;
}

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

.score-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
    font-variant-numeric: tabular-nums;
}

.score-table th {
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.7rem;
    text-align: left;
    padding: 0.3rem 0.5rem;
    border-bottom: 1px solid var(--panel-border);
}

.score-table td {
    padding: 0.28rem 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.score-table td:nth-child(3) {
    font-weight: 600;
}

.score-empty {
    text-align: center;
    color: var(--text-dim);
    padding: 0.8rem !important;
}

.score-highlight {
    background: rgba(255, 214, 0, 0.1);
    color: var(--gold);
}

/* ---------- Settings dialog ---------- */

.settings-dialog {
    width: min(560px, 94vw);
}

.dialog-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.settings-body {
    display: flex;
    flex-direction: column;
    gap: 1.3rem;
}

.settings-section h3 {
    font-size: 0.8rem;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.6rem;
}

.settings-hint {
    margin: 0 0 0.5rem;
    color: var(--text-dim);
    font-size: 0.8rem;
}

.setting-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    padding: 0.25rem 0;
    font-size: 0.9rem;
}

.setting-row input[type="range"] {
    width: 55%;
    accent-color: var(--accent);
}

.setting-row input[type="checkbox"] {
    width: 1.1rem;
    height: 1.1rem;
    accent-color: var(--accent);
}

.setting-row input[type="number"] {
    width: 5.5rem;
    padding: 0.3rem 0.5rem;
    border-radius: 6px;
    border: 1px solid var(--panel-border);
    background: rgba(0, 0, 0, 0.35);
    color: var(--text);
    text-align: right;
}

.setting-row select {
    flex: 1;
    padding: 0.4rem 0.6rem;
    border-radius: 6px;
    border: 1px solid var(--panel-border);
    background: rgba(0, 0, 0, 0.35);
    color: var(--text);
}

.binding-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.18rem 0;
}

.binding-label {
    flex: 1;
    font-size: 0.88rem;
    color: var(--text-dim);
}

.key-btn {
    min-width: 5.2rem;
    padding: 0.32rem 0.6rem;
    border-radius: 6px;
    border: 1px solid var(--panel-border);
    background: rgba(255, 255, 255, 0.06);
    color: var(--text);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
}

.key-btn:hover {
    border-color: var(--accent);
}

.key-btn.capturing {
    border-color: var(--gold);
    color: var(--gold);
    animation: blink 1s ease-in-out infinite;
}

.rules-grid {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 0.25rem 1rem;
    font-size: 0.88rem;
}

.rules-grid span:nth-child(odd) {
    color: var(--text-dim);
}

.rules-grid span:nth-child(even) {
    font-weight: 600;
    text-align: right;
}

/* ---------- Responsive ---------- */

@media (max-width: 900px) {
    :root {
        --pv-cell: 12px;
    }

    .side-panel {
        width: clamp(110px, 18vw, 150px);
    }

    .panel-box {
        padding: 0.5rem 0.6rem;
    }
}

@media (max-width: 640px) {
    .game-layout {
        gap: 0.4rem;
        padding: 0.4rem;
    }

    .playfield-wrap {
        height: min(88vh, 88svh);
    }

    .controls-box {
        display: none;
    }
}

/* ---------- Blazor error UI ---------- */

#blazor-error-ui {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 0.7rem 1.5rem;
    background: #3b1220;
    color: #ffd7de;
    border-top: 1px solid var(--accent-hot);
    box-shadow: 0 -2px 12px rgba(0, 0, 0, 0.5);
}

#blazor-error-ui .reload {
    color: #fff;
    text-decoration: underline;
    margin-left: 0.6rem;
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: 1rem;
    top: 0.6rem;
}

/* ------------------------------------------------------------- sfx console */

.sfx-console {
    position: fixed;
    left: 12px;
    bottom: 12px;
    z-index: 60;
    min-width: 240px;
    max-width: 360px;
    padding: 8px 12px;
    background: rgba(8, 10, 18, 0.72);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 8px;
    font-family: Consolas, "Cascadia Mono", monospace;
    font-size: 11px;
    line-height: 1.5;
    color: #8fd0ff;
    pointer-events: none;
    user-select: none;
}

.sfx-console-title {
    font-size: 10px;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: rgba(255, 255, 255, 0.45);
    margin-bottom: 2px;
}

.sfx-console .sfx-line {
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.sfx-console .sfx-line:first-of-type {
    color: #d3ecff;
    font-weight: 600;
}

/* ------------------------------------------------- keyboard menu navigation */

.menu-btn.kb-selected {
    outline: 2px solid #6ea8ff;
    outline-offset: 2px;
    background: rgba(110, 168, 255, 0.22);
}

.menu-hint {
    margin: 0.4rem 0 0;
    font-size: 0.75rem;
    color: rgba(255, 255, 255, 0.45);
    text-align: center;
}

.settings-dialog input:focus-visible,
.settings-dialog select:focus-visible,
.settings-dialog button:focus-visible,
.menu-dialog button:focus-visible {
    outline: 2px solid #6ea8ff;
    outline-offset: 2px;
}