:root {
    --bg: #f7f3f6;
    --card-bg: #ffffff;
    --accent: #e9899a;      /* мягкий розово-коралловый */
    --accent-soft: #f9d4dd;
    --accent-deep: #d55374;
    --text-main: #3a3a3a;
    --text-muted: #8a8a8a;
    --border-soft: #e3dce5;
    --shadow-soft: 0 18px 45px rgba(0, 0, 0, 0.07);
    --radius-xl: 24px;
    --radius-md: 12px;
    --transition-fast: 0.18s ease-out;
}

*,
*::before,
*::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    min-height: 100vh;
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    background: radial-gradient(circle at top left, #ffe9f2, #f8f4ff 40%, #f5f8fb 80%);
    color: var(--text-main);
}

.page {
    max-width: 1120px;
    margin: 0 auto;
    padding: 24px 16px 40px;
}

/* HEADER */

.header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 24px;
    gap: 16px;
}

.logo {
    font-weight: 700;
    font-size: 1.1rem;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent-deep);
}

.tagline {
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* LAYOUT */

.main {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(0, 1fr);
    gap: 24px;
}

@media (max-width: 820px) {
    .main {
        grid-template-columns: 1fr;
    }
}

/* CARD (игровое поле) */

.card {
    background: var(--card-bg);
    border-radius: var(--radius-xl);
    padding: 22px 22px 26px;
    box-shadow: var(--shadow-soft);
    border: 1px solid rgba(255, 255, 255, 0.8);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: "";
    position: absolute;
    inset: -60%;
    background: radial-gradient(circle at top right,
    rgba(249, 212, 221, 0.5),
    transparent 60%);
    opacity: 0.8;
    pointer-events: none;
}

.card > * {
    position: relative;
}

/* HEADER внутри карточки */

.card-header h1 {
    margin: 0 0 4px;
    font-size: 1.6rem;
}

.subtitle {
    margin: 0;
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* СТРОКА СТАТУСОМ */

.status-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin: 18px 0 16px;
    gap: 8px;
}

.status-text {
    font-size: 0.95rem;
    padding: 6px 12px;
    border-radius: 999px;
    background: #f9f5fb;
    border: 1px solid var(--border-soft);
}

.reset-btn {
    border-radius: 999px;
    border: none;
    padding: 8px 16px;
    font-size: 0.9rem;
    cursor: pointer;
    background: #f0e4ff;
    color: #5b3e8b;
    font-weight: 500;
    transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
    box-shadow: 0 8px 20px rgba(116, 83, 164, 0.18);
}

.reset-btn:hover {
    background: #e4d3ff;
    transform: translateY(-1px);
}

/* ИГРОВОЕ ПОЛЕ */

.board {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
    margin-bottom: 16px;
}

.cell {
    aspect-ratio: 1 / 1;
    border-radius: 18px;
    border: 1px solid var(--border-soft);
    background: linear-gradient(145deg, #ffffff, #f7f2ff);
    box-shadow:
            0 10px 20px rgba(0, 0, 0, 0.04),
            inset 0 0 0 1px rgba(255, 255, 255, 0.8);
    font-size: 2.2rem;
    font-weight: 600;
    color: #5b3e8b;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.cell:hover {
    transform: translateY(-1px);
    box-shadow:
            0 14px 30px rgba(0, 0, 0, 0.07),
            inset 0 0 0 1px rgba(255, 255, 255, 0.9);
}

.cell:disabled {
    cursor: default;
    transform: none;
    box-shadow:
            0 4px 10px rgba(0, 0, 0, 0.02),
            inset 0 0 0 1px rgba(255, 255, 255, 0.8);
}

.cell.player-x {
    color: #5b3e8b;
}

.cell.player-o {
    color: #d55374;
}

/* ПРИМЕЧАНИЕ */

.note {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.dot {
    width: 7px;
    height: 7px;
    border-radius: 999px;
    background: var(--accent);
}

/* БОКОВАЯ КОЛОНКА */

.side-info {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.side-card {
    background: rgba(255, 255, 255, 0.9);
    border-radius: var(--radius-xl);
    padding: 18px 18px 20px;
    border: 1px solid rgba(255, 255, 255, 0.9);
    box-shadow: 0 14px 28px rgba(0, 0, 0, 0.04);
}

.side-card h2 {
    margin: 0 0 10px;
    font-size: 1rem;
}

.side-card ul {
    margin: 0;
    padding-left: 18px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.side-card li + li {
    margin-top: 4px;
}

.side-card.muted {
    background: #fdf4f7;
    border-color: #f9d4dd;
    color: var(--text-muted);
}

/* МОДАЛКА */

.modal {
    position: fixed;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 50;
}

.modal.hidden {
    display: none;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(10, 8, 16, 0.32);
    backdrop-filter: blur(4px);
}

.modal-window {
    position: relative;
    z-index: 1;
    background: #ffffff;
    border-radius: 22px;
    padding: 20px 22px 18px;
    box-shadow: 0 24px 50px rgba(0, 0, 0, 0.25);
    width: min(360px, 92vw);
}

.modal-close {
    position: absolute;
    top: 10px;
    right: 10px;
    border-radius: 999px;
    border: none;
    background: transparent;
    font-size: 1.2rem;
    cursor: pointer;
    color: var(--text-muted);
}

.modal-content {
    margin-top: 6px;
}

.modal-title {
    margin: 0 0 6px;
    font-size: 1.2rem;
}

.modal-text {
    margin: 0;
    font-size: 0.95rem;
    color: var(--text-muted);
}

.promo-code {
    margin-top: 12px;
    font-size: 1.4rem;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-align: center;
    padding: 10px 0;
    border-radius: 14px;
    background: linear-gradient(135deg, #fbe5ec, #f0e4ff);
    color: var(--accent-deep);
}

.modal-actions {
    margin-top: 16px;
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}

.btn {
    border-radius: 999px;
    border: none;
    padding: 8px 16px;
    font-size: 0.9rem;
    cursor: pointer;
    transition: background var(--transition-fast), transform var(--transition-fast), box-shadow var(--transition-fast);
}

.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-deep));
    color: #ffffff;
    box-shadow: 0 10px 28px rgba(213, 83, 116, 0.35);
}

.btn-primary:hover {
    transform: translateY(-1px);
}

.btn-secondary {
    background: #f3eef6;
    color: var(--text-main);
}