/* CSS Custom Properties */
:root {
    --color-bg: #1a1a2e;
    --color-bg-light: #16213e;
    --color-primary: #e94560;
    --color-primary-dark: #c73e54;
    --color-secondary: #0f3460;
    --color-accent: #f9c74f;
    --color-text: #eaeaea;
    --color-text-muted: #a0a0a0;
    --color-success: #4ade80;
    --color-error: #f87171;

    --font-main: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --radius: 12px;
    --radius-sm: 8px;
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --transition: 0.2s ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
}

body {
    font-family: var(--font-main);
    background: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
    line-height: 1.5;
}

/* Container */
.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 1rem;
    min-height: 100vh;
}

/* Typography */
h1, h2, h3 {
    font-weight: 700;
}

h1 {
    font-size: 2.5rem;
    background: linear-gradient(135deg, var(--color-primary), var(--color-accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

h2 {
    font-size: 1.25rem;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

/* Hero */
.hero {
    text-align: center;
    padding: 3rem 1rem;
}

.tagline {
    color: var(--color-text-muted);
    font-size: 1.1rem;
    margin-top: 0.5rem;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: transform var(--transition), box-shadow var(--transition);
}

.btn:hover {
    transform: translateY(-2px);
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
    color: white;
    box-shadow: 0 4px 15px rgba(233, 69, 96, 0.4);
}

.btn-primary:hover {
    box-shadow: 0 6px 20px rgba(233, 69, 96, 0.5);
}

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

/* Game Grid */
.game-section {
    margin-bottom: 2rem;
}

.game-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1rem;
}

.game-card {
    background: var(--color-bg-light);
    border-radius: var(--radius);
    padding: 1.5rem 1rem;
    text-align: center;
    text-decoration: none;
    color: var(--color-text);
    transition: transform var(--transition), box-shadow var(--transition);
    border: 2px solid transparent;
}

.game-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow);
    border-color: var(--color-primary);
}

.game-card.coming-soon {
    opacity: 0.5;
    pointer-events: none;
}

.game-icon {
    font-size: 2.5rem;
    margin-bottom: 0.75rem;
}

.game-icon .emoji {
    display: inline-block;
}

.game-card h3 {
    font-size: 1rem;
    margin-bottom: 0.25rem;
}

.game-desc {
    font-size: 0.8rem;
    color: var(--color-text-muted);
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    color: var(--color-text-muted);
    font-size: 0.9rem;
}

/* Screens */
.screen {
    display: none;
}

.screen.active {
    display: block;
}

/* Back Link */
.back-link {
    display: inline-block;
    color: var(--color-text-muted);
    text-decoration: none;
    margin-bottom: 1rem;
    font-size: 0.9rem;
    transition: color var(--transition);
}

.back-link:hover {
    color: var(--color-text);
}

/* Join Form */
.join-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    max-width: 300px;
    margin: 2rem auto;
}

.join-form input {
    padding: 1rem;
    font-size: 1.1rem;
    border: 2px solid var(--color-secondary);
    border-radius: var(--radius);
    background: var(--color-bg-light);
    color: var(--color-text);
    text-align: center;
    transition: border-color var(--transition);
}

.join-form input:focus {
    outline: none;
    border-color: var(--color-primary);
}

.join-form input::placeholder {
    color: var(--color-text-muted);
}

/* Waiting Screen */
.waiting-content {
    text-align: center;
    padding: 4rem 1rem;
}

.spinner {
    width: 60px;
    height: 60px;
    border: 4px solid var(--color-secondary);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    margin: 0 auto 1.5rem;
    animation: spin 1s linear infinite;
}

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

/* Game Screen */
.game-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

#game-screen {
    flex: 1;
    display: flex;
    flex-direction: column;
}

#game-screen.active {
    display: flex;
}

.game-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem;
    background: var(--color-bg-light);
    border-radius: var(--radius);
    margin-bottom: 1rem;
}

.player-info {
    text-align: center;
    flex: 1;
}

.player-name {
    display: block;
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 0.25rem;
}

.player-score {
    font-size: 2rem;
    font-weight: 700;
}

.player-self .player-score {
    color: var(--color-success);
}

.player-opponent .player-score {
    color: var(--color-primary);
}

.vs {
    font-weight: 700;
    color: var(--color-text-muted);
    padding: 0 1rem;
}

.round-indicator {
    text-align: center;
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 1rem;
}

#round-number {
    color: var(--color-accent);
    font-weight: 700;
}

/* Game Area */
.game-area {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    padding: 1rem;
}

.choice-area {
    text-align: center;
    width: 100%;
}

.instruction {
    font-size: 1.1rem;
    color: var(--color-text-muted);
    margin-bottom: 1.5rem;
}

.choice-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.choice-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 1.5rem;
    min-width: 100px;
    background: var(--color-bg-light);
    border: 3px solid var(--color-secondary);
    border-radius: var(--radius);
    cursor: pointer;
    transition: all var(--transition);
}

.choice-btn:hover:not(:disabled) {
    border-color: var(--color-primary);
    transform: translateY(-4px);
}

.choice-btn:active:not(:disabled) {
    transform: translateY(-2px);
}

.choice-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.choice-btn.selected {
    border-color: var(--color-success);
    background: rgba(74, 222, 128, 0.1);
    opacity: 1;
}

.choice-btn .choice-emoji {
    font-size: 2.5rem;
}

.choice-btn .choice-label {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

/* Reveal Area */
.reveal-area {
    text-align: center;
    width: 100%;
}

.reveal-area.hidden {
    display: none;
}

.choice-display {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 2rem;
    margin-bottom: 1.5rem;
}

.choice-card {
    width: 100px;
    height: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-light);
    border: 3px solid var(--color-secondary);
    border-radius: var(--radius);
    animation: popIn 0.3s ease;
}

.choice-card .choice-emoji {
    font-size: 3rem;
}

.choice-card.rock { border-color: #a78bfa; }
.choice-card.paper { border-color: #60a5fa; }
.choice-card.scissors { border-color: #f472b6; }

@keyframes popIn {
    0% { transform: scale(0.5); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

.result-message {
    font-size: 1.5rem;
    font-weight: 700;
    animation: slideUp 0.3s ease;
}

.result-message.win { color: var(--color-success); }
.result-message.lose { color: var(--color-error); }
.result-message.tie { color: var(--color-accent); }

@keyframes slideUp {
    0% { transform: translateY(20px); opacity: 0; }
    100% { transform: translateY(0); opacity: 1; }
}

/* Status Bar */
.status-bar {
    padding: 0.5rem 1rem;
    text-align: center;
    font-size: 0.9rem;
    min-height: 2rem;
}

.status-bar.error {
    color: var(--color-error);
}

/* Overlays */
.overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(26, 26, 46, 0.95);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
}

.overlay.hidden {
    display: none;
}

.overlay-content {
    text-align: center;
    padding: 2rem;
}

.overlay-content p {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

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

/* Responsive */
@media (max-width: 400px) {
    .choice-btn {
        padding: 1rem;
        min-width: 80px;
    }

    .choice-btn .choice-emoji {
        font-size: 2rem;
    }

    .choice-card {
        width: 80px;
        height: 80px;
    }

    .choice-card .choice-emoji {
        font-size: 2.5rem;
    }

    h1 {
        font-size: 2rem;
    }
}

/* Utility Classes */
.hidden {
    display: none !important;
}

.text-center {
    text-align: center;
}

.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }