/* ==========================================
   CenoQuiz - Main Styles
   ========================================== */

:root {
    /* Primary Colors */
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --primary-light: #3b82f6;
    
    /* Secondary Colors */
    --secondary: #64748b;
    --secondary-dark: #475569;
    
    /* Answer Colors */
    --answer-red: #ef4444;
    --answer-red-dark: #dc2626;
    --answer-blue: #3b82f6;
    --answer-blue-dark: #2563eb;
    --answer-yellow: #f59e0b;
    --answer-yellow-dark: #d97706;
    --answer-green: #10b981;
    --answer-green-dark: #059669;
    
    /* Status Colors */
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
    
    /* Neutral Colors */
    --white: #ffffff;
    --gray-50: #f8fafc;
    --gray-100: #f1f5f9;
    --gray-200: #e2e8f0;
    --gray-300: #cbd5e1;
    --gray-400: #94a3b8;
    --gray-500: #64748b;
    --gray-600: #475569;
    --gray-700: #334155;
    --gray-800: #1e293b;
    --gray-900: #0f172a;
    
    /* Typography */
    --font-family: 'Poppins', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-full: 9999px;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 350ms ease;
}

/* ==========================================
   Reset & Base Styles
   ========================================== */

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

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: var(--font-family);
    background: linear-gradient(135deg, var(--gray-50) 0%, var(--gray-100) 100%);
    color: var(--gray-800);
    min-height: 100vh;
    line-height: 1.5;
}

/* ==========================================
   App Container & Screens
   ========================================== */

.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.screen {
    display: none;
    flex-direction: column;
    min-height: 100vh;
    animation: fadeIn 0.3s ease;
}

.screen.active {
    display: flex;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* ==========================================
   Logo
   ========================================== */

.logo-container {
    text-align: center;
    padding: var(--spacing-xl) 0;
}

.logo {
    font-size: 3.5rem;
    font-weight: 800;
    color: var(--gray-800);
    letter-spacing: -0.02em;
}

.logo span {
    color: var(--primary);
}

.logo.small {
    font-size: 1.75rem;
}

.tagline {
    color: var(--gray-500);
    font-size: 1.1rem;
    margin-top: var(--spacing-xs);
}

/* ==========================================
   Buttons
   ========================================== */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-family: var(--font-family);
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

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

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-700);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--gray-300);
}

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

.btn-danger:hover:not(:disabled) {
    background: var(--answer-red-dark);
}

.btn-ghost {
    background: transparent;
    color: var(--gray-600);
}

.btn-ghost:hover:not(:disabled) {
    background: var(--gray-100);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-2xl);
    font-size: 1.1rem;
}

.btn-small {
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: 0.875rem;
}

/* ==========================================
   Forms
   ========================================== */

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

.form-group label {
    display: block;
    font-weight: 500;
    color: var(--gray-700);
    margin-bottom: var(--spacing-sm);
}

input[type="text"],
input[type="password"],
textarea,
select {
    width: 100%;
    padding: var(--spacing-md);
    font-family: var(--font-family);
    font-size: 1rem;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-md);
    background: var(--white);
    transition: all var(--transition-fast);
}

input:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

textarea {
    resize: vertical;
    min-height: 100px;
}

.error-message {
    color: var(--error);
    font-size: 0.875rem;
    margin-top: var(--spacing-sm);
    min-height: 1.25rem;
}

.hint {
    color: var(--gray-500);
    font-size: 0.875rem;
    margin-top: var(--spacing-xs);
}

/* ==========================================
   Join Screen
   ========================================== */

#join-screen {
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

.join-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    box-shadow: var(--shadow-xl);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.join-step {
    display: none;
}

.join-step.active {
    display: block;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.join-card h2 {
    color: var(--gray-800);
    margin-bottom: var(--spacing-lg);
}

.code-input {
    font-size: 2.5rem !important;
    text-align: center;
    letter-spacing: 0.5rem;
    font-weight: 700;
    text-transform: uppercase;
}

.code-input::placeholder {
    color: var(--gray-300);
    letter-spacing: 0.5rem;
}

.nickname-input {
    font-size: 1.25rem !important;
    text-align: center;
}

.join-card .btn {
    width: 100%;
    margin-top: var(--spacing-lg);
}

/* ==========================================
   Waiting Room
   ========================================== */

#waiting-room {
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

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

.waiting-content .logo {
    color: var(--white);
}

.waiting-content .logo span {
    color: rgba(255, 255, 255, 0.9);
}

.player-card {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-2xl);
    margin-top: var(--spacing-xl);
    box-shadow: var(--shadow-xl);
}

.welcome-text {
    color: var(--success);
    font-weight: 600;
    font-size: 1.1rem;
}

.nickname-display {
    font-size: 2rem;
    color: var(--gray-800);
    margin: var(--spacing-md) 0;
}

.waiting-animation {
    display: flex;
    justify-content: center;
    gap: var(--spacing-sm);
    margin: var(--spacing-lg) 0;
}

.waiting-animation .dot {
    width: 12px;
    height: 12px;
    background: var(--primary);
    border-radius: 50%;
    animation: bounce 1.4s ease-in-out infinite;
}

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

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

@keyframes bounce {
    0%, 80%, 100% {
        transform: scale(0.8);
        opacity: 0.5;
    }
    40% {
        transform: scale(1.2);
        opacity: 1;
    }
}

.waiting-text {
    color: var(--gray-500);
}

/* ==========================================
   Question Screen
   ========================================== */

#question-screen {
    background: var(--gray-100);
}

.question-header {
    background: var(--white);
    box-shadow: var(--shadow-sm);
}

.timer-bar {
    height: 8px;
    background: var(--gray-200);
    overflow: hidden;
}

.timer-progress {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
    width: 100%;
    transition: width 0.1s linear;
}

.timer-progress.warning {
    background: linear-gradient(90deg, var(--warning) 0%, var(--answer-yellow) 100%);
}

.timer-progress.danger {
    background: linear-gradient(90deg, var(--error) 0%, var(--answer-red) 100%);
}

.question-info {
    display: flex;
    justify-content: space-between;
    padding: var(--spacing-md) var(--spacing-lg);
}

.question-number {
    font-weight: 600;
    color: var(--gray-600);
}

.player-score {
    font-weight: 700;
    color: var(--primary);
}

.question-content {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
}

.question-text {
    font-size: 1.75rem;
    font-weight: 600;
    text-align: center;
    color: var(--gray-800);
    max-width: 800px;
}

.answers-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
    padding: var(--spacing-lg);
    max-width: 800px;
    margin: 0 auto;
    width: 100%;
}

.answer-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    font-family: var(--font-family);
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--white);
    border: none;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-fast);
    min-height: 80px;
    text-align: center;
    word-break: break-word;
}

.answer-btn:hover:not(:disabled) {
    transform: scale(1.02);
    box-shadow: var(--shadow-lg);
}

.answer-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.answer-btn.selected {
    transform: scale(0.98);
    box-shadow: inset 0 0 0 4px rgba(255, 255, 255, 0.5);
}

.answer-btn.red { background: var(--answer-red); }
.answer-btn.blue { background: var(--answer-blue); }
.answer-btn.yellow { background: var(--answer-yellow); }
.answer-btn.green { background: var(--answer-green); }

.answer-btn.correct {
    background: var(--success) !important;
    animation: pulse 0.5s ease;
}

.answer-btn.incorrect {
    background: var(--gray-400) !important;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* Answer Feedback */
.answer-feedback {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 100;
    animation: fadeIn 0.3s ease;
}

.answer-feedback.hidden {
    display: none;
}

.feedback-icon {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
    margin-bottom: var(--spacing-lg);
}

.answer-feedback.correct .feedback-icon {
    background: var(--success);
}

.answer-feedback.correct .feedback-icon::after {
    content: '\2713';
    color: white;
}

.answer-feedback.incorrect .feedback-icon {
    background: var(--error);
}

.answer-feedback.incorrect .feedback-icon::after {
    content: '\2717';
    color: white;
}

.feedback-text {
    font-size: 2rem;
    font-weight: 700;
    color: var(--white);
}

.feedback-points {
    font-size: 1.5rem;
    color: var(--gray-300);
    margin-top: var(--spacing-sm);
}

.feedback-rank {
    font-size: 1.25rem;
    color: var(--white);
    margin-top: var(--spacing-lg);
    padding: var(--spacing-sm) var(--spacing-lg);
    background: rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
}

/* ==========================================
   Results Screen
   ========================================== */

#results-screen {
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl);
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
}

.results-content {
    text-align: center;
    max-width: 600px;
    width: 100%;
}

.results-content .logo {
    color: var(--white);
    margin-bottom: var(--spacing-xl);
}

.results-content .logo span {
    color: rgba(255, 255, 255, 0.9);
}

/* Podium */
.podium-container {
    display: flex;
    justify-content: center;
    align-items: flex-end;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-2xl);
    min-height: 280px;
}

.podium-place {
    display: flex;
    flex-direction: column;
    align-items: center;
    animation: slideUp 0.5s ease forwards;
    opacity: 0;
}

.podium-place:nth-child(1) { animation-delay: 0.3s; }
.podium-place:nth-child(2) { animation-delay: 0.1s; }
.podium-place:nth-child(3) { animation-delay: 0.5s; }

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(50px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.podium-avatar {
    width: 60px;
    height: 60px;
    background: var(--white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    margin-bottom: var(--spacing-sm);
}

.podium-name {
    font-weight: 600;
    color: var(--white);
    margin-bottom: var(--spacing-xs);
    max-width: 100px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.podium-score {
    font-size: 0.875rem;
    color: rgba(255, 255, 255, 0.8);
    margin-bottom: var(--spacing-sm);
}

.podium-stand {
    width: 100px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2rem;
    font-weight: 800;
    color: var(--gray-700);
    border-radius: var(--radius-md) var(--radius-md) 0 0;
}

.podium-place.first .podium-stand {
    height: 120px;
    background: linear-gradient(180deg, #ffd700 0%, #ffb800 100%);
}

.podium-place.second .podium-stand {
    height: 90px;
    background: linear-gradient(180deg, #c0c0c0 0%, #a8a8a8 100%);
}

.podium-place.third .podium-stand {
    height: 60px;
    background: linear-gradient(180deg, #cd7f32 0%, #b87333 100%);
}

/* Player Results Card */
.player-results {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
}

.player-results h3 {
    color: var(--gray-600);
    margin-bottom: var(--spacing-lg);
}

.result-stats {
    display: flex;
    justify-content: space-around;
}

.stat {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--gray-500);
}

#play-again-btn {
    background: var(--white);
    color: var(--primary);
}

#play-again-btn:hover {
    background: var(--gray-100);
}

/* ==========================================
   Responsive Design
   ========================================== */

@media (max-width: 768px) {
    .logo {
        font-size: 2.5rem;
    }
    
    .question-text {
        font-size: 1.25rem;
    }
    
    .answers-grid {
        grid-template-columns: 1fr;
    }
    
    .answer-btn {
        padding: var(--spacing-lg);
        min-height: 60px;
    }
    
    .podium-stand {
        width: 80px;
    }
    
    .podium-place.first .podium-stand { height: 100px; }
    .podium-place.second .podium-stand { height: 75px; }
    .podium-place.third .podium-stand { height: 50px; }
}

@media (max-width: 480px) {
    .join-card {
        padding: var(--spacing-xl);
    }
    
    .code-input {
        font-size: 2rem !important;
        letter-spacing: 0.3rem;
    }
    
    .result-stats {
        flex-direction: column;
        gap: var(--spacing-lg);
    }
}

/* ==========================================
   Custom Modal
   ========================================== */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.6);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.modal-overlay.active {
    display: flex;
    animation: fadeIn 0.2s ease;
}

.modal-content {
    background: var(--white);
    border-radius: var(--radius-xl);
    padding: var(--spacing-xl);
    max-width: 400px;
    width: 90%;
    text-align: center;
    box-shadow: var(--shadow-xl);
    animation: modalSlideIn 0.3s ease;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-content h3 {
    color: var(--gray-800);
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
}

.modal-content p {
    color: var(--gray-600);
    margin-bottom: var(--spacing-xl);
}

.modal-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
}

.modal-buttons .btn {
    min-width: 100px;
}

/* ==========================================
   Player Get Ready & Waiting States
   ========================================== */

.get-ready-message {
    grid-column: 1 / -1;
    text-align: center;
    padding: var(--spacing-2xl);
    animation: pulse 1.5s ease-in-out infinite;
}

.get-ready-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
}

.get-ready-message p {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--gray-600);
}

.waiting-overlay {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(0, 0, 0, 0.85);
    padding: var(--spacing-xl);
    text-align: center;
    display: none;
    flex-direction: column;
    align-items: center;
    z-index: 50;
}

.waiting-overlay.active {
    display: flex;
    animation: slideUpOverlay 0.3s ease;
}

@keyframes slideUpOverlay {
    from {
        opacity: 0;
        transform: translateY(100%);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.waiting-overlay p {
    color: var(--white);
    font-size: 1.1rem;
    margin-top: var(--spacing-md);
}

/* ==========================================
   Host Preview Hidden State
   ========================================== */

.host-answers-grid.preview-hidden {
    opacity: 0;
    visibility: hidden;
    height: 0;
    overflow: hidden;
}

/* Skip Button */
.skip-btn {
    margin-left: var(--spacing-lg);
}