:root {
    /* Colors */
    --flame-start: #ff2d55;
    --flame-middle: #ff6b35;
    --flame-end: #ffb347;
    --bg-dark: #121218;
    --bg-card: #1a1a22;
    --bg-elevated: #222230;
    --text-primary: #fafafa;
    --text-secondary: #8a8a9a;
    --text-muted: #5a5a6a;
    --success: #34d399;
    --danger: #ef4444;
    --accent: #fbbf24;
    --border-color: #2a2a3a;
    --gradient-flame: linear-gradient(135deg, var(--flame-start), var(--flame-middle), var(--flame-end));
    --gradient-dark: linear-gradient(180deg, #18181f, #0d0d12);
    --gradient-card: linear-gradient(145deg, #1e1e28, #16161c);
    --shadow-glow: 0 0 40px rgba(255, 45, 85, 0.3);
    --shadow-card: 0 10px 40px rgba(0, 0, 0, 0.4);
    --shadow-button: 0 4px 20px rgba(255, 45, 85, 0.4);
    --radius: 1rem;
    --radius-lg: 1.5rem;
    --radius-full: 9999px;
}

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

body {
    font-family: 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--gradient-dark);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

/* Screens */
.screen {
    display: none;
    min-height: 100vh;
    padding: 1rem;
}

.screen.active {
    display: flex;
    flex-direction: column;
}

/* Home Screen */
#home-screen {
    align-items: center;
    justify-content: center;
    position: relative;
}

.glow-bg {
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 400px;
    background: radial-gradient(ellipse, rgba(255, 45, 85, 0.15), transparent 70%);
    pointer-events: none;
}

.content {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3rem;
    width: 100%;
    max-width: 400px;
}

/* Logo */
.logo {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.logo-icon {
    position: relative;
    background: var(--gradient-flame);
    padding: 1rem;
    border-radius: var(--radius-full);
    color: white;
}

.logo-icon::before {
    content: '';
    position: absolute;
    inset: -10px;
    background: var(--gradient-flame);
    border-radius: var(--radius-full);
    filter: blur(20px);
    opacity: 0.4;
    z-index: -1;
}

.logo h1 {
    font-size: 2.5rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: var(--gradient-flame);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

/* Buttons */
.buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    width: 100%;
}

.btn-flame {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: var(--gradient-flame);
    color: white;
    border: none;
    border-radius: var(--radius-full);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-button);
}

.btn-flame:hover {
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 6px 30px rgba(255, 45, 85, 0.5);
}

.btn-flame:active {
    transform: translateY(0) scale(0.98);
}

.btn-flame.full-width {
    width: 100%;
    margin-top: 1.5rem;
}

.btn-flame.play-btn {
    padding: 1.25rem 3rem;
    font-size: 1.25rem;
}

.btn-secondary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.75rem;
    padding: 1rem 2rem;
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-full);
    font-family: inherit;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-secondary:hover {
    background: var(--bg-card);
    border-color: var(--flame-start);
}

.btn-secondary .arrow {
    margin-left: auto;
}

/* Info */
.info {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.8;
}

/* Back Button */
.back-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: transparent;
    color: var(--text-secondary);
    border: none;
    font-family: inherit;
    font-size: 0.9rem;
    cursor: pointer;
    transition: color 0.3s ease;
}

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

/* Form Container */
.form-container {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
}

.glass-card {
    background: var(--gradient-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: 2rem;
    width: 100%;
    max-width: 400px;
    backdrop-filter: blur(20px);
}

.glass-card h2 {
    text-align: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.form-subtitle {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.85rem;
    margin-bottom: 2rem;
}

/* Input Group */
.input-group {
    position: relative;
    margin-bottom: 1rem;
}

.input-group svg {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    pointer-events: none;
}

.input-group input {
    width: 100%;
    padding: 1rem 1rem 1rem 3rem;
    background: rgba(255, 255, 255, 0.05);
    border: 2px solid var(--border-color);
    border-radius: var(--radius);
    font-family: inherit;
    font-size: 1rem;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

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

.input-group input:focus {
    outline: none;
    border-color: var(--flame-start);
    box-shadow: 0 0 0 3px rgba(255, 45, 85, 0.2);
}

/* Game Screen */
#game-screen {
    padding: 1.5rem;
}

.game-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
}

.room-badge {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-elevated);
    border-radius: var(--radius-full);
    font-size: 0.85rem;
    font-weight: 500;
}

.room-badge svg {
    color: var(--flame-start);
}

.game-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

@media (min-width: 1024px) {
    .game-content {
        flex-direction: row;
    }
}

/* Ranking Panel */
.ranking-panel {
    width: 100%;
    order: 2;
}

@media (min-width: 1024px) {
    .ranking-panel {
        width: 320px;
        order: 1;
    }
}

.ranking-panel h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 1rem;
}

.ranking-panel h3 svg {
    color: var(--accent);
}

#ranking-list {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    max-height: 300px;
    overflow-y: auto;
}

.ranking-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background: rgba(255, 255, 255, 0.03);
    border-radius: var(--radius);
    transition: background 0.3s ease;
}

.ranking-item:hover {
    background: rgba(255, 255, 255, 0.06);
}

.ranking-item.current {
    border: 1px solid rgba(255, 45, 85, 0.5);
    background: rgba(255, 45, 85, 0.1);
}

.ranking-item .player-info {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.ranking-item .rank-icon {
    width: 24px;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.ranking-item .rank-icon.gold { color: var(--accent); }
.ranking-item .rank-icon.silver { color: #a0a0b0; }
.ranking-item .rank-icon.bronze { color: #cd7f32; }

.ranking-item .player-name {
    font-weight: 500;
}

.ranking-item .player-name.current {
    color: var(--flame-start);
}

.ranking-item .host-badge {
    font-size: 0.7rem;
    color: var(--text-muted);
    margin-left: 0.5rem;
}

.ranking-item .score {
    font-weight: 700;
    font-variant-numeric: tabular-nums;
}

.ranking-item .score.positive { color: var(--success); }
.ranking-item .score.negative { color: var(--danger); }

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

@media (min-width: 1024px) {
    .game-area {
        order: 2;
    }
}

.play-area, .card-area, .loading-area {
    text-align: center;
}

.play-prompt {
    margin-bottom: 2rem;
}

.prompt-text {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.prompt-info {
    font-size: 1.1rem;
}

.text-success { color: var(--success); font-weight: 600; }
.text-danger { color: var(--danger); font-weight: 600; }

/* Challenge Card */
.card-area {
    width: 100%;
    max-width: 360px;
    height: 480px;
    position: relative;
}

.challenge-card {
    position: absolute;
    width: 100%;
    background: var(--bg-card);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    cursor: grab;
    touch-action: none;
    user-select: none;
    transition: transform 0.1s ease;
}

.challenge-card:active {
    cursor: grabbing;
}

.challenge-card.swiping-right {
    animation: swipeRight 0.3s ease-out forwards;
}

.challenge-card.swiping-left {
    animation: swipeLeft 0.3s ease-out forwards;
}

@keyframes swipeRight {
    to { transform: translateX(150%) rotate(20deg); opacity: 0; }
}

@keyframes swipeLeft {
    to { transform: translateX(-150%) rotate(-20deg); opacity: 0; }
}

.skip-indicator, .complete-indicator {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    z-index: 10;
    padding: 1rem;
    border-radius: var(--radius-full);
    opacity: 0;
    transition: opacity 0.2s ease;
}

.skip-indicator {
    left: -20px;
    background: var(--danger);
    color: white;
}

.complete-indicator {
    right: -20px;
    background: var(--success);
    color: white;
}

.card-header {
    height: 100px;
    padding: 1rem 1.5rem;
    position: relative;
    display: flex;
    align-items: flex-end;
}

.card-header.ousado { background: linear-gradient(135deg, var(--flame-start), var(--flame-middle)); }
.card-header.diversao { background: linear-gradient(135deg, var(--accent), var(--flame-end)); }
.card-header.segredos { background: linear-gradient(135deg, #a855f7, #ec4899); }
.card-header.fitness { background: linear-gradient(135deg, var(--success), #10b981); }
.card-header.geral { background: linear-gradient(135deg, var(--flame-start), var(--accent)); }

.card-header::after {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.2);
}

.category-badge {
    position: relative;
    z-index: 1;
    padding: 0.25rem 0.75rem;
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(10px);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    font-weight: 500;
    color: white;
    text-transform: capitalize;
}

.flame-icon {
    position: absolute;
    top: 1rem;
    right: 1rem;
    color: rgba(255, 255, 255, 0.5);
    z-index: 1;
}

.card-content {
    padding: 2.5rem 2rem;
    min-height: 150px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.card-content p {
    font-size: 1.25rem;
    font-weight: 600;
    line-height: 1.5;
    text-align: center;
}

.card-footer {
    padding: 0 2rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.action-hint {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.action-hint svg:first-child { color: var(--danger); }
.action-hint svg:last-child { color: var(--success); }

.progress-bar {
    height: 4px;
    background: var(--bg-elevated);
    border-radius: 2px;
    margin: 0 2rem 1.5rem;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    width: 0;
    background: var(--flame-start);
    border-radius: 2px;
    transition: width 0.1s ease, background 0.1s ease;
}

.progress-fill.success { background: var(--success); }
.progress-fill.danger { background: var(--danger); }

.swipe-instructions {
    margin-top: 2rem;
    color: var(--text-secondary);
    font-size: 0.85rem;
    line-height: 1.6;
}

/* Loading */
.loading-area {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    color: var(--text-secondary);
}

.spinner {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-top-color: var(--flame-start);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.spinner.large {
    width: 40px;
    height: 40px;
    border-width: 3px;
}

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

/* Toast */
.toast {
    position: fixed;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    padding: 1rem 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-weight: 500;
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

.toast.success { border-color: var(--success); color: var(--success); }
.toast.error { border-color: var(--danger); color: var(--danger); }
.toast.info { border-color: var(--accent); }

/* Animations */
.slide-up {
    animation: slideUp 0.5s ease-out both;
}

.delay-1 { animation-delay: 0.2s; }
.delay-2 { animation-delay: 0.4s; }

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.pulse-glow {
    animation: pulseGlow 2s ease-in-out infinite;
}

@keyframes pulseGlow {
    0%, 100% { box-shadow: 0 0 20px rgba(255, 45, 85, 0.3); }
    50% { box-shadow: 0 0 40px rgba(255, 45, 85, 0.5); }
}

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

/* Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}