/* Atari Go - Japanese-inspired minimalist UI */

/* CSS Reset and base styles */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    /* Japanese-inspired color palette */
    --color-bg: #faf8f5;
    --color-bg-paper: #f7f4ef;
    --color-bg-warm: #f5f2eb;
    --color-text: #3d3d3d;
    --color-text-light: #6b6b6b;
    --color-text-muted: #9a9a9a;

    /* Traditional Japanese colors */
    --color-sumi: #2d2d2d;          /* Ink black */
    --color-kitsune: #c4a35a;       /* Fox gold - Go board */
    --color-sakura: #fedfe1;        /* Cherry blossom pink */
    --color-asagi: #48929b;         /* Blue-green */
    --color-akebono: #f19072;       /* Dawn orange-pink */
    --color-fuji: #8b81c3;          /* Wisteria purple */
    --color-matcha: #7b8d42;        /* Tea green */
    --color-shinonome: #f8c3cd;     /* Daybreak pink */

    /* Stone colors */
    --color-stone-black: #1a1a1a;
    --color-stone-white: #f5f5f5;
    --color-stone-white-border: #d0d0d0;

    /* Accent colors */
    --color-accent: var(--color-asagi);
    --color-accent-hover: #3a7a82;
    --color-error: #c75c5c;
    --color-success: var(--color-matcha);

    /* Board */
    --color-board: #dcb35c;
    --color-board-lines: #2d2d2d;

    /* Spacing - generous for ma (negative space) */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2.5rem;
    --spacing-2xl: 4rem;

    /* Typography */
    --font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic Pro', 'Yu Gothic', system-ui, sans-serif;
    --font-family-serif: 'Noto Serif JP', 'Hiragino Mincho Pro', 'Yu Mincho', serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --font-size-3xl: 2.5rem;

    /* Border radius - subtle */
    --radius-sm: 2px;
    --radius-md: 4px;
    --radius-lg: 8px;
    --radius-full: 50%;

    /* Shadows - very soft */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.04);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.08);
}

@import url('https://fonts.googleapis.com/css2?family=Noto+Sans+JP:wght@300;400;500&family=Noto+Serif+JP:wght@400;500&display=swap');

html {
    font-size: 16px;
}

body {
    font-family: var(--font-family);
    font-weight: 300;
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    min-height: 100vh;
    position: relative;
    letter-spacing: 0.02em;
}

/* Mount Fuji background - ephemeral, almost transparent */
body::before {
    content: '';
    position: fixed;
    bottom: 0;
    right: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 600'%3E%3Cdefs%3E%3ClinearGradient id='sky' x1='0%25' y1='0%25' x2='0%25' y2='100%25'%3E%3Cstop offset='0%25' style='stop-color:%23faf8f5;stop-opacity:1'/%3E%3Cstop offset='100%25' style='stop-color:%23f0ebe3;stop-opacity:1'/%3E%3C/linearGradient%3E%3ClinearGradient id='mountain' x1='0%25' y1='0%25' x2='0%25' y2='100%25'%3E%3Cstop offset='0%25' style='stop-color:%238b81c3;stop-opacity:0.08'/%3E%3Cstop offset='40%25' style='stop-color:%239090a8;stop-opacity:0.05'/%3E%3Cstop offset='100%25' style='stop-color:%23a0a0b0;stop-opacity:0.03'/%3E%3C/linearGradient%3E%3ClinearGradient id='snow' x1='0%25' y1='0%25' x2='0%25' y2='100%25'%3E%3Cstop offset='0%25' style='stop-color:%23ffffff;stop-opacity:0.15'/%3E%3Cstop offset='100%25' style='stop-color:%23ffffff;stop-opacity:0.05'/%3E%3C/linearGradient%3E%3C/defs%3E%3Cpath d='M600 150 L900 450 L850 450 L600 200 L350 450 L300 450 Z' fill='url(%23mountain)'/%3E%3Cpath d='M600 150 L680 230 L650 230 L600 180 L550 230 L520 230 Z' fill='url(%23snow)'/%3E%3Cellipse cx='200' cy='180' rx='80' ry='25' fill='%238b81c3' opacity='0.03'/%3E%3Cellipse cx='280' cy='200' rx='60' ry='20' fill='%238b81c3' opacity='0.025'/%3E%3Cellipse cx='950' cy='160' rx='70' ry='22' fill='%238b81c3' opacity='0.025'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: bottom right;
    background-size: 80% auto;
    opacity: 0.7;
    pointer-events: none;
    z-index: -1;
}

/* Subtle paper texture overlay */
body::after {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    opacity: 0.015;
    pointer-events: none;
    z-index: -1;
}

/* App layout */
#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Header - minimal and elegant */
.header {
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md) var(--spacing-lg);
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.header h1 {
    font-family: var(--font-family-serif);
    font-size: var(--font-size-2xl);
    font-weight: 400;
    letter-spacing: 0.15em;
    color: var(--color-text);
    margin-bottom: var(--spacing-xs);
}

.header .tagline {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
    font-weight: 300;
    letter-spacing: 0.1em;
}

/* Main content */
.main {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: var(--spacing-xl) var(--spacing-md);
}

.game-container {
    width: 100%;
    max-width: 700px;
}

/* Loading state */
.loading {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--color-text-muted);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
}

.loading-spinner {
    width: 32px;
    height: 32px;
    border: 2px solid rgba(0, 0, 0, 0.06);
    border-top-color: var(--color-accent);
    border-radius: var(--radius-full);
    animation: loading-spin 1.2s linear infinite;
}

@keyframes loading-spin {
    to {
        transform: rotate(360deg);
    }
}

.loading-text {
    font-size: var(--font-size-sm);
}

/* Footer - subtle */
.footer {
    text-align: center;
    padding: var(--spacing-lg) var(--spacing-md);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    letter-spacing: 0.05em;
    border-top: 1px solid rgba(0, 0, 0, 0.03);
}

/* Buttons - refined and minimal */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    font-weight: 400;
    letter-spacing: 0.05em;
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
    background-color: transparent;
}

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

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

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    transform: none;
}

.btn.loading {
    position: relative;
    color: transparent;
    pointer-events: none;
}

.btn.loading::after {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    top: 50%;
    left: 50%;
    margin-left: -8px;
    margin-top: -8px;
    border: 2px solid transparent;
    border-top-color: currentColor;
    border-radius: var(--radius-full);
    animation: btn-spinner 0.8s linear infinite;
}

.btn-primary.loading::after {
    border-top-color: white;
}

.btn-secondary.loading::after {
    border-top-color: var(--color-text);
}

@keyframes btn-spinner {
    to {
        transform: rotate(360deg);
    }
}

.btn-primary {
    background-color: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
}

.btn-primary:hover:not(:disabled) {
    background-color: var(--color-accent-hover);
    border-color: var(--color-accent-hover);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background-color: var(--color-bg-paper);
    color: var(--color-text);
    border-color: rgba(0, 0, 0, 0.1);
}

.btn-secondary:hover:not(:disabled) {
    background-color: white;
    border-color: rgba(0, 0, 0, 0.15);
    box-shadow: var(--shadow-sm);
}

.btn-danger {
    background-color: transparent;
    color: var(--color-error);
    border-color: var(--color-error);
}

.btn-danger:hover:not(:disabled) {
    background-color: var(--color-error);
    color: white;
}

.btn-outline {
    background-color: transparent;
    color: var(--color-text-light);
    border-color: rgba(0, 0, 0, 0.1);
}

.btn-outline:hover:not(:disabled) {
    background-color: var(--color-bg-paper);
    border-color: rgba(0, 0, 0, 0.15);
}

/* Game lobby - clean and spacious */
.lobby {
    text-align: center;
    padding: var(--spacing-lg);
    animation: lobby-appear 0.4s ease-out forwards;
}

@keyframes lobby-appear {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.lobby h2 {
    font-family: var(--font-family-serif);
    font-size: var(--font-size-xl);
    font-weight: 400;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-xl);
    color: var(--color-text);
}

.lobby h3 {
    font-size: var(--font-size-base);
    font-weight: 400;
    margin-bottom: var(--spacing-md);
    color: var(--color-text);
    letter-spacing: 0.05em;
}

/* Create game form */
.create-game-form {
    background-color: rgba(255, 255, 255, 0.6);
    backdrop-filter: blur(10px);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-xl);
    border: 1px solid rgba(0, 0, 0, 0.04);
    box-shadow: var(--shadow-sm);
}

.form-group {
    margin-bottom: var(--spacing-lg);
    text-align: left;
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    letter-spacing: 0.03em;
}

.form-group input[type="text"] {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: var(--radius-md);
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    background-color: white;
    transition: all 0.2s ease;
}

.form-group input[type="text"]:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px rgba(72, 146, 155, 0.1);
}

.form-group input[type="text"]::placeholder {
    color: var(--color-text-muted);
}

.checkbox-group {
    margin-top: var(--spacing-md);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
}

.checkbox-label input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--color-accent);
}

/* Lobby divider */
.lobby-divider {
    display: flex;
    align-items: center;
    margin: var(--spacing-xl) 0;
}

.lobby-divider::before,
.lobby-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: linear-gradient(to right, transparent, rgba(0, 0, 0, 0.06), transparent);
}

.lobby-divider span {
    padding: 0 var(--spacing-lg);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    letter-spacing: 0.05em;
}

/* Available games section */
.available-games {
    text-align: left;
}

.games-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.games-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-xl);
    color: var(--color-text-muted);
}

.loading-spinner.small {
    width: 18px;
    height: 18px;
    border-width: 2px;
}

.no-games {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--color-text-muted);
}

.no-games .hint {
    font-size: var(--font-size-sm);
    margin-top: var(--spacing-sm);
    opacity: 0.8;
}

.no-games.error {
    color: var(--color-error);
}

/* Game listing */
.game-listing {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: rgba(255, 255, 255, 0.5);
    border: 1px solid rgba(0, 0, 0, 0.04);
    border-radius: var(--radius-md);
    transition: all 0.2s ease;
    animation: game-listing-appear 0.3s ease-out forwards;
}

@keyframes game-listing-appear {
    from {
        opacity: 0;
        transform: translateY(-8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.game-listing:hover {
    background-color: rgba(255, 255, 255, 0.8);
    border-color: rgba(0, 0, 0, 0.08);
    box-shadow: var(--shadow-sm);
}

.game-listing-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.game-creator {
    font-weight: 400;
    color: var(--color-text);
}

.game-size {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: rgba(0, 0, 0, 0.03);
    border-radius: var(--radius-sm);
}

.game-id {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    font-family: monospace;
    opacity: 0.7;
}

/* Board size selection */
.board-size-select {
    margin-bottom: var(--spacing-lg);
}

.board-size-select label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    letter-spacing: 0.03em;
}

.board-size-options {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
}

.board-size-options .btn {
    min-width: 70px;
    padding: var(--spacing-sm) var(--spacing-md);
}

.board-size-options .btn.active {
    background-color: var(--color-accent);
    color: white;
    border-color: var(--color-accent);
}

/* Waiting actions */
.waiting-actions {
    margin-top: var(--spacing-xl);
}

/* Status badges */
.status-badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-xs);
    font-weight: 400;
    letter-spacing: 0.03em;
}

.status-badge.private {
    background-color: rgba(0, 0, 0, 0.04);
    color: var(--color-text-light);
}

.status-badge.public {
    background-color: rgba(123, 141, 66, 0.1);
    color: var(--color-matcha);
}

.status-badge.waiting {
    background-color: rgba(196, 163, 90, 0.15);
    color: #8a7340;
    animation: status-pulse 2.5s ease-in-out infinite;
}

@keyframes status-pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.6;
    }
}

.status-badge.playing {
    background-color: rgba(123, 141, 66, 0.1);
    color: var(--color-matcha);
}

.status-badge.finished {
    background-color: rgba(139, 129, 195, 0.1);
    color: var(--color-fuji);
}

/* Game view */
.game-view {
    /* Animation only on initial appearance */
}

.game-view.game-view-initial {
    animation: game-view-appear 0.4s ease-out forwards;
}

@keyframes game-view-appear {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

/* Game info panel */
.game-info {
    background-color: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-lg);
    padding: var(--spacing-md) var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    border: 1px solid rgba(0, 0, 0, 0.04);
}

.game-info-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm) 0;
}

.game-info-row:not(:last-child) {
    border-bottom: 1px solid rgba(0, 0, 0, 0.04);
}

.player-indicator {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.stone-icon {
    width: 18px;
    height: 18px;
    border-radius: var(--radius-full);
    box-shadow: var(--shadow-sm);
}

.stone-icon.black {
    background: radial-gradient(circle at 30% 30%, #4a4a4a, var(--color-stone-black));
}

.stone-icon.white {
    background: radial-gradient(circle at 30% 30%, #ffffff, #e8e8e8);
    border: 1px solid var(--color-stone-white-border);
}

.turn-indicator {
    font-size: var(--font-size-xs);
    font-weight: 400;
    color: var(--color-accent);
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: rgba(72, 146, 155, 0.1);
    border-radius: var(--radius-sm);
    animation: turn-appear 0.3s ease-out forwards;
}

@keyframes turn-appear {
    from {
        opacity: 0;
        transform: scale(0.9);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

/* Waiting indicator */
.waiting-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-muted);
}

.waiting-dots {
    display: flex;
    gap: 6px;
}

.waiting-dots span {
    width: 6px;
    height: 6px;
    background-color: var(--color-accent);
    border-radius: var(--radius-full);
    animation: waiting-bounce 1.4s ease-in-out infinite;
}

.waiting-dots span:nth-child(1) {
    animation-delay: 0s;
}

.waiting-dots span:nth-child(2) {
    animation-delay: 0.2s;
}

.waiting-dots span:nth-child(3) {
    animation-delay: 0.4s;
}

@keyframes waiting-bounce {
    0%, 80%, 100% {
        transform: scale(0.6);
        opacity: 0.4;
    }
    40% {
        transform: scale(1);
        opacity: 1;
    }
}

/* Share link */
.share-link {
    display: flex;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.share-link input {
    flex: 1;
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid rgba(0, 0, 0, 0.08);
    border-radius: var(--radius-md);
    font-family: monospace;
    font-size: var(--font-size-sm);
    background-color: white;
    color: var(--color-text-light);
}

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

.share-link .btn.copied {
    background-color: var(--color-success);
    color: white;
    border-color: var(--color-success);
}

/* Error messages */
.error-message {
    background-color: rgba(199, 92, 92, 0.1);
    color: var(--color-error);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-md);
    text-align: center;
    font-size: var(--font-size-sm);
    border: 1px solid rgba(199, 92, 92, 0.2);
}

/* Go board styles - refined */
.board-wrapper {
    display: flex;
    justify-content: center;
    margin: var(--spacing-lg) 0;
}

.board {
    position: relative;
    background: linear-gradient(145deg, #e4c46a 0%, #d4a84a 100%);
    border-radius: var(--radius-md);
    box-shadow:
        0 2px 4px rgba(0, 0, 0, 0.1),
        0 8px 16px rgba(0, 0, 0, 0.08),
        inset 0 1px 1px rgba(255, 255, 255, 0.3);
}

.board.board-initial {
    animation: board-appear 0.5s ease-out forwards;
}

@keyframes board-appear {
    from {
        opacity: 0;
        transform: scale(0.98);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.board-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
}

.board-intersections {
    position: relative;
}

.intersection {
    position: absolute;
    cursor: pointer;
    border-radius: var(--radius-full);
    transition: all 0.15s ease;
}

.intersection:hover:not(.occupied) {
    background-color: rgba(0, 0, 0, 0.08);
    transform: scale(1.05);
}

.intersection.invalid:hover {
    background-color: rgba(199, 92, 92, 0.2);
    cursor: not-allowed;
}

/* Stones - elegant with subtle gradients */
.stone {
    position: absolute;
    border-radius: var(--radius-full);
    transition: transform 0.2s ease;
}

.stone.black {
    background: radial-gradient(circle at 35% 35%, #5a5a5a, #1a1a1a 60%, #0a0a0a);
    box-shadow:
        2px 3px 6px rgba(0, 0, 0, 0.3),
        inset -1px -1px 2px rgba(0, 0, 0, 0.3),
        inset 2px 2px 4px rgba(100, 100, 100, 0.2);
}

.stone.white {
    background: radial-gradient(circle at 35% 35%, #ffffff, #f0f0f0 50%, #d8d8d8);
    border: 1px solid rgba(0, 0, 0, 0.1);
    box-shadow:
        2px 3px 6px rgba(0, 0, 0, 0.15),
        inset -1px -1px 2px rgba(0, 0, 0, 0.05),
        inset 2px 2px 4px rgba(255, 255, 255, 0.8);
}

.stone.captured {
    animation: stone-capture 0.5s ease-out forwards;
}

@keyframes stone-capture {
    0% {
        opacity: 1;
        transform: scale(1);
    }
    50% {
        opacity: 0.5;
        transform: scale(1.1);
    }
    100% {
        opacity: 0;
        transform: scale(0.3);
    }
}

.stone.last-move::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 25%;
    height: 25%;
    background-color: var(--color-accent);
    border-radius: var(--radius-full);
    transform: translate(-50%, -50%);
    opacity: 0.9;
}

/* Initial stone marker */
.stone.initial-stone::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 16%;
    height: 16%;
    border-radius: var(--radius-full);
    transform: translate(-50%, -50%);
    opacity: 0.35;
    pointer-events: none;
}

.stone.black.initial-stone::before {
    background-color: #888;
}

.stone.white.initial-stone::before {
    background-color: #666;
}

/* Star points (hoshi) */
.star-point {
    position: absolute;
    width: 6px;
    height: 6px;
    background-color: var(--color-board-lines);
    border-radius: var(--radius-full);
    transform: translate(-50%, -50%);
    pointer-events: none;
}

/* Board coordinates */
.board-coords {
    position: absolute;
    font-size: 10px;
    color: rgba(0, 0, 0, 0.4);
    font-weight: 400;
    letter-spacing: 0;
}

.board-coords.col {
    bottom: -18px;
    transform: translateX(-50%);
}

.board-coords.row {
    left: -18px;
    transform: translateY(-50%);
}

/* Hover preview */
.hover-preview {
    position: absolute;
    border-radius: var(--radius-full);
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.15s ease;
}

.hover-preview.visible {
    opacity: 0.4;
}

.hover-preview.black {
    background-color: var(--color-stone-black);
}

.hover-preview.white {
    background-color: var(--color-stone-white);
    border: 1px solid var(--color-stone-white-border);
}

/* Turn message */
.turn-message {
    text-align: center;
    padding: var(--spacing-sm);
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    min-height: 1.5em;
    letter-spacing: 0.02em;
}

/* Game actions */
.game-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-top: var(--spacing-lg);
}

.game-actions .btn {
    min-width: 90px;
}

/* Modal - clean and centered */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(250, 248, 245, 0.9);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 100;
    animation: modal-fade-in 0.3s ease-out forwards;
}

@keyframes modal-fade-in {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.modal {
    background-color: white;
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    text-align: center;
    max-width: 380px;
    width: 90%;
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(0, 0, 0, 0.04);
    animation: modal-slide-in 0.3s ease-out forwards;
}

@keyframes modal-slide-in {
    from {
        opacity: 0;
        transform: translateY(-16px) scale(0.98);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal h2 {
    font-family: var(--font-family-serif);
    font-size: var(--font-size-xl);
    font-weight: 400;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-lg);
}

.modal p {
    margin-bottom: var(--spacing-lg);
    color: var(--color-text-light);
    line-height: 1.6;
}

.modal-actions {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-top: var(--spacing-lg);
}

/* Rematch messages in modal */
.rematch-message {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-sm);
    text-align: center;
}

.rematch-message.declined {
    background-color: rgba(199, 92, 92, 0.1);
    color: var(--color-error);
    border: 1px solid rgba(199, 92, 92, 0.2);
}

.rematch-message.cancelled {
    background-color: rgba(0, 0, 0, 0.04);
    color: var(--color-text-light);
    border: 1px solid rgba(0, 0, 0, 0.06);
}

/* Winner display in modal */
.winner-display {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.winner-stone {
    width: 48px;
    height: 48px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.winner-text {
    font-family: var(--font-family-serif);
    font-size: var(--font-size-lg);
    font-weight: 400;
    color: var(--color-text);
    margin: 0;
    letter-spacing: 0.05em;
}

.result-message {
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-md);
    font-size: var(--font-size-sm);
}

/* Winner indicator in game info */
.winner-indicator {
    font-size: var(--font-size-xs);
    font-weight: 400;
    color: var(--color-success);
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: rgba(123, 141, 66, 0.1);
    border-radius: var(--radius-sm);
}

/* Captured stones highlight */
.stone.captured-highlight {
    opacity: 0.4;
    animation: captured-pulse 1.5s ease-in-out infinite;
    box-shadow: 0 0 0 3px var(--color-error), 0 0 12px var(--color-error);
}

@keyframes captured-pulse {
    0%, 100% {
        box-shadow: 0 0 0 3px var(--color-error), 0 0 12px var(--color-error);
    }
    50% {
        box-shadow: 0 0 0 5px var(--color-error), 0 0 20px var(--color-error);
    }
}

/* Draw badge */
.draw-indicator {
    font-size: var(--font-size-xs);
    font-weight: 400;
    color: #8a7340;
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: rgba(196, 163, 90, 0.15);
    border-radius: var(--radius-sm);
}

/* Confirmation dialog */
.modal-warning {
    color: var(--color-error);
    margin-bottom: var(--spacing-md);
}

/* Pass indicator */
.pass-indicator {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: rgba(0, 0, 0, 0.04);
    color: var(--color-text-light);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-sm);
}

/* Connection status indicator */
.connection-status {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

.connection-dot {
    width: 6px;
    height: 6px;
    border-radius: var(--radius-full);
    background-color: var(--color-text-muted);
    transition: background-color 0.3s ease;
}

.connection-dot.connected {
    background-color: var(--color-success);
}

.connection-dot.connecting {
    background-color: var(--color-kitsune);
    animation: connection-pulse 1s ease-in-out infinite;
}

.connection-dot.disconnected {
    background-color: var(--color-error);
}

@keyframes connection-pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.4;
    }
}

/* Responsive design */
@media (max-width: 600px) {
    :root {
        font-size: 14px;
    }

    body::before {
        background-size: 100% auto;
        opacity: 0.5;
    }

    .header {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .header h1 {
        font-size: var(--font-size-xl);
    }

    .main {
        padding: var(--spacing-md);
    }

    .lobby {
        padding: var(--spacing-md);
    }

    .create-game-form {
        padding: var(--spacing-lg);
    }

    .board-coords {
        font-size: 9px;
    }

    .board-coords.col {
        bottom: -14px;
    }

    .board-coords.row {
        left: -14px;
    }

    .game-actions {
        flex-wrap: wrap;
    }

    .game-actions .btn {
        flex: 1;
        min-width: 100px;
    }

    .modal {
        padding: var(--spacing-xl);
        width: 95%;
    }

    .share-link {
        flex-direction: column;
    }

    .share-link .btn {
        width: 100%;
    }

    .game-listing {
        flex-direction: column;
        gap: var(--spacing-md);
        text-align: center;
    }

    .game-listing-info {
        justify-content: center;
    }

    .game-listing .btn {
        width: 100%;
    }
}

/* Tablet breakpoint */
@media (min-width: 601px) and (max-width: 900px) {
    .game-container {
        max-width: 650px;
    }

    body::before {
        background-size: 70% auto;
    }
}

/* Large screens - more prominent Fuji */
@media (min-width: 1200px) {
    body::before {
        background-size: 60% auto;
        opacity: 0.8;
    }
}

/* Touch devices */
@media (hover: none) and (pointer: coarse) {
    .intersection {
        min-width: 32px;
        min-height: 32px;
    }

    .btn {
        padding: var(--spacing-md) var(--spacing-lg);
        min-height: 44px;
    }
}

/* Reduced motion preference */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* ============================================================================
   Authentication Styles
   ============================================================================ */

/* Login page */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 50vh;
    padding: var(--spacing-xl);
    animation: login-appear 0.4s ease-out forwards;
}

@keyframes login-appear {
    from {
        opacity: 0;
        transform: translateY(8px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.login-card {
    background-color: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(10px);
    padding: var(--spacing-2xl);
    border-radius: var(--radius-lg);
    text-align: center;
    max-width: 400px;
    width: 100%;
    border: 1px solid rgba(0, 0, 0, 0.04);
    box-shadow: var(--shadow-md);
}

.login-card h2 {
    font-family: var(--font-family-serif);
    font-size: var(--font-size-xl);
    font-weight: 400;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-sm);
    color: var(--color-text);
}

.login-subtitle {
    color: var(--color-text-muted);
    font-size: var(--font-size-sm);
    margin-bottom: var(--spacing-xl);
}

.login-buttons {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.login-note {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    margin-top: var(--spacing-lg);
}

/* OAuth buttons */
.btn-oauth {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 400;
    text-decoration: none;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.btn-oauth:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.oauth-icon {
    flex-shrink: 0;
}

.btn-google {
    background-color: white;
    color: var(--color-text);
    border-color: rgba(0, 0, 0, 0.1);
}

.btn-google:hover {
    background-color: #f8f9fa;
    border-color: rgba(0, 0, 0, 0.15);
}

.btn-github {
    background-color: #24292e;
    color: white;
}

.btn-github:hover {
    background-color: #1b1f23;
}

/* User info in header */
.header {
    position: relative;
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    position: absolute;
    right: var(--spacing-md);
    top: 50%;
    transform: translateY(-50%);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: var(--radius-full);
    border: 1px solid rgba(0, 0, 0, 0.1);
}

.user-name {
    font-size: var(--font-size-sm);
    color: var(--color-text);
    max-width: 150px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

/* Small button variant */
.btn-small {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: var(--font-size-xs);
}

/* Welcome user in lobby */
.welcome-user {
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-sm) var(--spacing-md);
    background-color: rgba(72, 146, 155, 0.08);
    border-radius: var(--radius-md);
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
}

.welcome-user strong {
    color: var(--color-text);
    font-weight: 500;
}

/* Responsive adjustments for auth */
@media (max-width: 600px) {
    .login-card {
        padding: var(--spacing-xl);
    }

    .user-info {
        position: static;
        transform: none;
        justify-content: center;
        margin-top: var(--spacing-sm);
    }

    .user-name {
        max-width: 100px;
    }

    .header {
        flex-direction: column;
    }
}