/* Number Baseball — dark aesthetic matched to sinbiroum.com main page.
   Design tokens (colors / fonts / radii) are kept in :root so future tweaks
   ripple everywhere. Markup IDs/classes are unchanged from v4.4 so JS
   selectors and event hooks keep working without edits. */

:root {
    --bg-deep: #04091A;
    --bg-mid: #080F24;
    --bg-card: #0C1530;
    --bg-card-hover: #111D3B;
    --cyan: #3DFFD0;
    --cyan-dim: rgba(61, 255, 208, 0.12);
    --cyan-border: rgba(61, 255, 208, 0.2);
    --gold: #E8B84B;
    --gold-dim: rgba(232, 184, 75, 0.12);
    --gold-border: rgba(232, 184, 75, 0.3);
    --red: #ff6b8a;
    --green: #4CAF50;
    --text-primary: #EAF0FF;
    --text-secondary: #7D93BF;
    --text-muted: #3D4F75;
    --border: rgba(255, 255, 255, 0.07);
    --border-strong: rgba(255, 255, 255, 0.15);
    --radius: 12px;
    --radius-sm: 8px;
    --radius-xs: 6px;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Syne', system-ui, -apple-system, sans-serif;
    font-weight: 400;
    line-height: 1.7;
    background: var(--bg-deep);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 32px 20px;
    position: relative;
    overflow-x: hidden;
}

/* 48px grid overlay — same as sinbiroum hero. */
body::before {
    content: '';
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(61, 255, 208, 0.025) 1px, transparent 1px),
        linear-gradient(90deg, rgba(61, 255, 208, 0.025) 1px, transparent 1px);
    background-size: 48px 48px;
    pointer-events: none;
    z-index: 0;
}

/* Soft glow orbs — fixed so they hang behind content during scroll. */
body::after {
    content: '';
    position: fixed;
    top: -10%;
    left: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(61, 255, 208, 0.06), transparent 70%);
    filter: blur(120px);
    pointer-events: none;
    z-index: 0;
}

.container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    max-width: 600px;
    width: 100%;
    padding: 36px 28px;
    position: relative;
    z-index: 1;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.4);
}

.container::before {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at 30% 0%, rgba(61, 255, 208, 0.04), transparent 60%);
    border-radius: var(--radius);
    pointer-events: none;
}

.version {
    position: absolute;
    top: 14px;
    right: 16px;
    font-size: 10px;
    color: var(--text-muted);
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    z-index: 2;
}

h1 {
    text-align: center;
    color: var(--text-primary);
    margin-bottom: 8px;
    font-size: 36px;
    font-weight: 700;
    font-family: 'Cormorant Garamond', serif;
    letter-spacing: -0.01em;
    line-height: 1.1;
    position: relative;
    z-index: 1;
}

.subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 30px;
    font-size: 14px;
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    position: relative;
    z-index: 1;
}

/* ---------- Language selector ---------- */
.language-selector {
    display: flex;
    gap: 14px;
    margin-bottom: 30px;
    position: relative;
    z-index: 1;
}

.lang-btn {
    flex: 1;
    padding: 24px 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-mid);
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s, transform 0.2s;
    text-align: center;
    color: var(--text-primary);
    font-family: 'Syne', sans-serif;
    font-size: 14px;
    font-weight: 600;
}

.lang-btn:hover {
    border-color: var(--cyan-border);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
}

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

.lang-btn .flag {
    font-size: 36px;
    margin-bottom: 10px;
}

/* ---------- Mode selector ---------- */
.mode-selector {
    display: none;
    position: relative;
    z-index: 1;
}

.mode-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 14px;
    margin-bottom: 14px;
}

.mode-btn-solo {
    grid-column: 1 / -1;
}

.mode-btn {
    padding: 22px 18px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-mid);
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s, transform 0.2s;
    text-align: center;
    color: var(--text-primary);
}

.mode-btn:hover {
    border-color: var(--cyan-border);
    background: var(--bg-card-hover);
    transform: translateY(-3px);
}

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

.mode-btn .icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.mode-btn .title {
    font-family: 'Syne', sans-serif;
    font-size: 16px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.mode-btn .desc {
    font-size: 12px;
    color: var(--text-secondary);
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    letter-spacing: 0.04em;
}

/* "How to Play" entry — subtle text button under the mode grid. */
.help-link {
    display: block;
    width: fit-content;
    margin: 18px auto 0;
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    font-size: 11px;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    cursor: pointer;
    padding: 8px 14px;
    transition: color 0.2s;
}

.help-link:hover {
    color: var(--cyan);
}

/* ---------- Room / waiting / game sections ---------- */
.room-section,
.game-area {
    display: none;
    position: relative;
    z-index: 1;
}

.room-code-display {
    background: var(--bg-mid);
    border: 1px solid var(--cyan-border);
    border-radius: var(--radius);
    padding: 24px 20px;
    text-align: center;
    margin-bottom: 20px;
}

.room-code-display > div:first-child {
    color: var(--text-secondary) !important;
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    font-size: 11px !important;
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.room-code {
    font-size: 38px;
    font-weight: 700;
    color: var(--cyan);
    letter-spacing: 12px;
    margin: 12px 0;
    font-family: 'JetBrains Mono', ui-monospace, monospace;
}

.copy-btn {
    padding: 10px 18px;
    background: var(--cyan-dim);
    color: var(--cyan);
    border: 1px solid var(--cyan-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-size: 12px;
    margin-top: 10px;
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    letter-spacing: 0.06em;
    transition: background 0.2s, border-color 0.2s;
}

.copy-btn:hover {
    background: rgba(61, 255, 208, 0.2);
    border-color: rgba(61, 255, 208, 0.4);
}

/* ---------- Inputs ---------- */
.input-group {
    margin-bottom: 18px;
}

.input-group input {
    width: 100%;
    padding: 16px;
    font-size: 28px;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    text-align: center;
    font-weight: 600;
    letter-spacing: 14px;
    background: var(--bg-mid);
    color: var(--text-primary);
    /* Monospace for legibility + automatic per-digit column alignment. */
    font-family: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;
    outline: none;
    transition: border-color 0.2s, background 0.2s;
}

.input-group input:focus {
    border-color: var(--cyan);
    background: var(--bg-card-hover);
}

.input-group input::placeholder {
    color: var(--text-muted);
    letter-spacing: 14px;
}

/* ---------- Buttons ---------- */
.btn {
    width: 100%;
    padding: 14px;
    font-size: 14px;
    font-weight: 700;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background 0.2s, border-color 0.2s, transform 0.2s, box-shadow 0.2s;
    font-family: 'Syne', sans-serif;
    letter-spacing: 0.04em;
    border: 1px solid transparent;
}

.btn:disabled {
    opacity: 0.35;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--cyan);
    color: var(--bg-deep);
    border-color: var(--cyan);
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(61, 255, 208, 0.25);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(0);
}

.btn-secondary {
    background: transparent;
    color: var(--text-primary);
    border: 1px solid var(--border-strong);
    margin-top: 10px;
}

.btn-secondary:hover {
    border-color: var(--text-secondary);
    background: rgba(255, 255, 255, 0.03);
}

/* ---------- Player status cards ---------- */
.players-status {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 20px;
}

.player-card {
    background: var(--bg-mid);
    padding: 16px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: border-color 0.2s;
}

.player-card.me {
    border-color: var(--cyan-border);
    background: linear-gradient(135deg, var(--bg-mid), rgba(61, 255, 208, 0.04));
}

.player-card.opponent {
    border-color: var(--gold-border);
    background: linear-gradient(135deg, var(--bg-mid), rgba(232, 184, 75, 0.04));
}

.player-name {
    font-family: 'Syne', sans-serif;
    font-weight: 700;
    font-size: 14px;
    color: var(--text-primary);
    margin-bottom: 10px;
}

.player-attempts {
    font-family: 'Cormorant Garamond', serif;
    font-size: 32px;
    font-weight: 700;
    color: var(--cyan);
    line-height: 1;
}

.player-card.opponent .player-attempts {
    color: var(--gold);
}

.player-status {
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 6px;
    letter-spacing: 0.06em;
    text-transform: uppercase;
}

.last-guess {
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    font-size: 12px;
    color: var(--text-primary) !important;
    margin-top: 10px;
    padding: 8px 10px;
    background: rgba(255, 255, 255, 0.03);
    border-left: 2px solid var(--cyan);
    border-radius: 0 var(--radius-xs) var(--radius-xs) 0;
    letter-spacing: 1px;
    font-weight: 500;
}

.player-card.opponent .last-guess {
    border-left-color: var(--gold);
}

/* ---------- Game area / history ---------- */
.game-info {
    background: var(--bg-mid);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px;
    text-align: center;
    margin-bottom: 18px;
}

.attempts {
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    font-size: 14px;
    color: var(--text-secondary);
    letter-spacing: 0.08em;
}

#attemptCount {
    color: var(--cyan);
    font-weight: 700;
    font-size: 18px;
}

.history {
    max-height: 280px;
    overflow-y: auto;
    margin-bottom: 18px;
    padding-right: 4px;
}

.history::-webkit-scrollbar {
    width: 6px;
}

.history::-webkit-scrollbar-track {
    background: var(--bg-mid);
    border-radius: 3px;
}

.history::-webkit-scrollbar-thumb {
    background: var(--text-muted);
    border-radius: 3px;
}

.history::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

.history-item {
    background: var(--bg-mid);
    border: 1px solid var(--border);
    border-left: 3px solid var(--cyan);
    border-radius: var(--radius-xs);
    padding: 10px 14px;
    margin-bottom: 8px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

/* League rows have an extra "actor" label; pin it to a fixed width so
   the digit columns line up across all rows regardless of label length. */
.history-item-user,
.history-item-cpu {
    display: grid;
    grid-template-columns: 92px 1fr auto;
    gap: 12px;
    align-items: center;
}

.history-item-cpu {
    border-left-color: var(--gold);
    background: var(--bg-mid);
}

.guess-number {
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 10px;
    text-align: center;
}

.result {
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    font-size: 12px;
    font-weight: 700;
    padding: 4px 12px;
    background: var(--cyan-dim);
    color: var(--cyan);
    border: 1px solid var(--cyan-border);
    border-radius: var(--radius-xs);
    letter-spacing: 0.06em;
}

.history-item-cpu .result {
    background: var(--gold-dim);
    color: var(--gold);
    border-color: var(--gold-border);
}

/* ---------- Modal ---------- */
.modal {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(4, 9, 26, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    justify-content: center;
    align-items: center;
    z-index: 1000;
    padding: 20px;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--cyan-border);
    border-radius: var(--radius);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.6);
    padding: 40px 32px;
    text-align: center;
    max-width: 380px;
    width: 100%;
    position: relative;
    overflow: hidden;
}

.modal-content::before {
    content: '';
    position: absolute;
    top: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 400px;
    height: 300px;
    background: radial-gradient(circle, rgba(61, 255, 208, 0.08), transparent 70%);
    pointer-events: none;
}

.modal-title {
    font-size: 56px;
    margin-bottom: 16px;
    position: relative;
    z-index: 1;
}

.modal-text {
    font-family: 'Cormorant Garamond', serif;
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 12px;
    position: relative;
    z-index: 1;
}

.modal-detail {
    color: var(--text-secondary);
    margin: 16px 0 24px;
    white-space: pre-line;
    font-size: 14px;
    line-height: 1.7;
    position: relative;
    z-index: 1;
}

/* ---------- Waiting / spinner ---------- */
.waiting-text {
    text-align: center;
    color: var(--text-secondary);
    padding: 24px;
    font-size: 14px;
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    letter-spacing: 0.06em;
}

.spinner {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid rgba(61, 255, 208, 0.15);
    border-top: 2px solid var(--cyan);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* ---------- Turn info banner ---------- */
#turnInfo,
#leagueTurnInfo {
    background: var(--bg-mid) !important;
    border: 1px solid var(--cyan-border) !important;
    border-radius: var(--radius) !important;
    color: var(--cyan) !important;
    font-family: 'JetBrains Mono', ui-monospace, monospace !important;
    font-size: 12px !important;
    font-weight: 600 !important;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    padding: 12px !important;
}

/* ---------- League: level cards ---------- */
.level-card {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 16px 18px;
    margin-bottom: 10px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-mid);
    cursor: pointer;
    transition: border-color 0.2s, background 0.2s, transform 0.2s;
}

.level-card:hover {
    border-color: var(--cyan-border);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
}

.level-card:active {
    transform: translateY(0);
}

.level-card.locked {
    opacity: 0.5;
    cursor: not-allowed;
}

.level-card.locked:hover {
    border-color: var(--border);
    background: var(--bg-mid);
    transform: none;
}

.level-card-icon {
    font-size: 24px;
    width: 44px;
    height: 44px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--cyan-border);
    background: var(--cyan-dim);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.level-card.locked .level-card-icon {
    border-color: var(--border);
    background: rgba(255, 255, 255, 0.02);
}

.level-card-body {
    flex: 1;
    min-width: 0;
}

.level-card-title {
    display: flex;
    align-items: baseline;
    gap: 8px;
    margin-bottom: 4px;
}

.level-card-name {
    font-family: 'Syne', sans-serif;
    font-weight: 700;
    color: var(--text-primary);
    font-size: 15px;
}

.level-card-tier {
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    font-size: 10px;
    color: var(--gold);
    letter-spacing: 0.08em;
    text-transform: uppercase;
}

.level-card-status {
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    font-size: 11px;
    color: var(--text-secondary);
    letter-spacing: 0.04em;
}

.level-card-arrow {
    font-size: 14px;
    color: var(--cyan);
    font-family: 'JetBrains Mono', ui-monospace, monospace;
}

.level-card.locked .level-card-arrow {
    color: var(--text-muted);
}

.history-actor {
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    font-size: 10px;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    /* Fixed width keeps digit columns aligned across rows. */
    width: 92px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.history-item-cpu .history-actor {
    color: var(--gold);
}

/* ---------- How-to-Play screen ---------- */
#howToPlay {
    display: none;
    position: relative;
    z-index: 1;
}

.help-title {
    font-family: 'Cormorant Garamond', serif;
    font-size: 26px;
    font-weight: 700;
    text-align: center;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.help-section {
    background: var(--bg-mid);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 18px 20px;
    margin-bottom: 14px;
}

.help-section-head {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 14px;
}

.help-section-icon {
    font-size: 22px;
}

.help-section-title {
    font-family: 'Syne', sans-serif;
    font-weight: 700;
    font-size: 16px;
    color: var(--text-primary);
}

.help-text {
    font-size: 13px;
    line-height: 1.7;
    color: var(--text-secondary);
}

.help-feedback-row {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 0;
}

.help-badge {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-sm);
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    font-size: 13px;
    font-weight: 700;
    letter-spacing: 0;
}

.help-badge-s {
    background: rgba(76, 175, 80, 0.15);
    color: var(--green);
    border: 1px solid rgba(76, 175, 80, 0.35);
}

.help-badge-b {
    background: var(--cyan-dim);
    color: var(--cyan);
    border: 1px solid var(--cyan-border);
}

.help-badge-out {
    background: rgba(125, 147, 191, 0.12);
    color: var(--text-secondary);
    border: 1px solid var(--border-strong);
    font-size: 10px;
}

.help-rule-row {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 6px 0;
}

.help-rule-num {
    flex-shrink: 0;
    width: 22px;
    height: 22px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--cyan-dim);
    border: 1px solid var(--cyan-border);
    color: var(--cyan);
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    font-size: 11px;
    font-weight: 700;
}

.help-example-title {
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    font-size: 14px;
    font-weight: 700;
    color: var(--cyan);
    margin-bottom: 12px;
    letter-spacing: 0.04em;
}

.help-example-row {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 5px 0;
    font-family: 'JetBrains Mono', ui-monospace, monospace;
    font-size: 12px;
    color: var(--text-secondary);
}

.help-example-row .dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    flex-shrink: 0;
}

.help-example-row .dot-out { background: var(--text-muted); }
.help-example-row .dot-ball { background: var(--cyan); opacity: 0.7; }
.help-example-row .dot-close { background: var(--gold); }
.help-example-row .dot-win { background: var(--green); }

/* ---------- Entrance animation ---------- */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(16px); }
    to { opacity: 1; transform: translateY(0); }
}

.container > h1,
.container > .subtitle,
.container > #languageSelector,
.container > #modeSelector,
.container > .room-section,
.container > .game-area,
.container > #howToPlay {
    animation: fadeInUp 0.5s ease backwards;
}

.container > .subtitle { animation-delay: 0.08s; }
.container > #languageSelector,
.container > #modeSelector,
.container > .room-section,
.container > .game-area,
.container > #howToPlay { animation-delay: 0.16s; }

/* ---------- Mobile ---------- */
@media (max-width: 480px) {
    body {
        padding: 16px 12px;
    }

    .container {
        padding: 28px 20px;
    }

    h1 {
        font-size: 30px;
    }

    .room-code {
        font-size: 30px;
        letter-spacing: 8px;
    }

    .players-status {
        grid-template-columns: 1fr;
    }

    .input-group input {
        font-size: 24px;
        letter-spacing: 10px;
    }

    .input-group input::placeholder {
        letter-spacing: 10px;
    }
}