/* CSS Variables for Theming */
:root {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-card: rgba(255, 255, 255, 0.95);
    --text-primary: #333333;
    --text-secondary: #666666;
    --border-color: #d0d0d0;
    --accent-color: #4a90e2;
    --accent-hover: #357abd;
    --success-color: #4caf50;
    --warning-color: #ff9800;
    --error-color: #f44336;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.05);
    --glass-blur: 10px;
    --glass-border: #e0e0e0;
}

.theme-dark {
    --bg-primary: #0f0f0f;
    --bg-secondary: #2a2a2a;
    --bg-card: rgba(40, 40, 40, 0.95);
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --border-color: #404040;
    --accent-color: #5ba3f5;
    --accent-hover: #4a90e2;
    --shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
    --glass-blur: 10px;
    --glass-border: #505050;
}

/* Reset and Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Screen Management */
.screen {
    display: none;
    min-height: 100vh;
}

.screen.active {
    display: block;
}

/* Start Screen */
#start-screen {
    min-height: 100vh;
    background: linear-gradient(135deg, var(--accent-color) 0%, var(--accent-hover) 100%);
}

#start-screen.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

#start-screen .container {
    background: var(--bg-card);
    border-radius: 20px;
    padding: 40px;
    box-shadow: var(--shadow);
    max-width: 600px;
    width: 100%;
    border: 2px solid var(--border-color);
}

.logo {
    text-align: center;
    margin-bottom: 40px;
}

.logo h1 {
    font-size: 2.5em;
    color: var(--accent-color);
    margin-bottom: 10px;
}

.logo .subtitle {
    color: var(--text-secondary);
    font-size: 1.1em;
}

.actions {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.actions.single {
    grid-template-columns: 1fr;
    justify-items: center;
}

.action-card {
    padding: 20px;
    border: 2px solid var(--border-color);
    border-radius: 15px;
    background: var(--bg-card);
    backdrop-filter: blur(var(--glass-blur));
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.action-card h2 {
    font-size: 1.2em;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.action-card form {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.action-card input {
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1em;
    background: var(--bg-primary);
    color: var(--text-primary);
}

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

.error-message {
    display: none;
    padding: 12px;
    background: var(--error-color);
    color: white;
    border-radius: 6px;
    text-align: center;
    margin-top: 20px;
}

/* Room Screen */
#room-screen.screen.active {
    display: flex;
    min-height: 100vh;
}

/* Left Sidebar */
.room-sidebar {
    width: 80px;
    background: var(--bg-card);
    border-right: 2px solid var(--border-color);
    backdrop-filter: blur(var(--glass-blur));
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 15px 0;
    gap: 10px;
    position: fixed;
    left: 0;
    top: 0;
    height: 100vh;
    z-index: 100;
}

.sidebar-btn {
    background: transparent;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    width: 50px;
    height: 50px;
    cursor: pointer;
    font-size: 1.3em;
    color: var(--text-primary);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sidebar-btn:hover {
    background: var(--bg-secondary);
    border-color: var(--accent-color);
}

.sidebar-btn:before {
    content: attr(data-tooltip);
    position: absolute;
    left: calc(100% + 15px);
    top: 50%;
    transform: translateY(-50%);
    background: rgba(0, 0, 0, 0.9);
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.75em;
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s;
    z-index: 1000;
}

.sidebar-btn:hover:before {
    opacity: 1;
}

/* Main Room Content */
.room-main {
    flex: 1;
    margin-left: 80px;
    display: flex;
    flex-direction: column;
}

.room-top-bar {
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 20px;
    background: var(--bg-card);
    border-bottom: 2px solid var(--border-color);
    gap: 30px;
    flex-wrap: wrap;
}

.room-info {
    display: flex;
    align-items: center;
    gap: 15px;
    flex: 0;
    order: 1;
}

.room-code {
    font-weight: 600;
    font-size: 0.95em;
    color: var(--text-secondary);
}

.active-task {
    padding: 5px 12px;
    background: var(--bg-secondary);
    border-radius: 20px;
    font-size: 0.9em;
    color: var(--text-secondary);
}

.room-average {
    font-size: 1.2em;
    font-weight: bold;
    color: var(--success-color);
    padding: 5px 15px;
    background: var(--bg-secondary);
    border-radius: 6px;
}

.room-actions {
    display: flex;
    gap: 10px;
}

.icon-btn {
    background: transparent;
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 10px 14px;
    cursor: pointer;
    font-size: 1.2em;
    color: var(--text-primary);
    position: relative;
    backdrop-filter: blur(var(--glass-blur));
}

.icon-btn:hover {
    background: var(--bg-card);
    border-color: var(--accent-color);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.icon-btn:before {
    content: attr(data-tooltip);
    position: absolute;
    top: calc(100% + 10px);
    left: 50%;
    transform: translateX(-50%);
    background: rgba(0, 0, 0, 0.9);
    color: white;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 0.75em;
    white-space: nowrap;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s;
    z-index: 1000;
}

.icon-btn:hover:before {
    opacity: 1;
}

.icon-btn.spectator {
    background: var(--warning-color);
    color: white;
}

.room-content {
    flex: 1;
    padding: 30px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: flex-start;
    gap: 30px;
}

/* Users Grid */
.users-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 15px;
    width: 100%;
    max-width: 800px;
    justify-items: center;
}

.user-card {
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: 15px;
    padding: 12px 8px;
    text-align: center;
    width: 120px;
    min-width: 120px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.user-card:hover {
    border-color: var(--accent-color);
    box-shadow: var(--shadow);
}

.user-card.spectator {
    opacity: 0.6;
    border-style: dashed;
}

.user-card.revealed {
    border-color: var(--success-color);
}

.user-card.has-voted {
    border-color: var(--success-color);
    box-shadow: 0 0 10px rgba(76, 175, 80, 0.3);
}

.user-status.icon-voted {
    font-size: 1.4em;
    color: var(--success-color);
}

.user-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2em;
    overflow: hidden;
    background: var(--bg-secondary);
}

.user-avatar-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: 50%;
}

.user-name {
    font-weight: 600;
    font-size: 0.9em;
    color: var(--text-primary);
    word-break: break-word;
}

.user-status {
    font-size: 2em;
    font-weight: bold;
    color: var(--accent-color);
}

.badge {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.85em;
}

.badge-voted {
    background: var(--success-color);
    color: white;
}

.badge-not-voted {
    background: var(--bg-secondary);
    color: var(--text-secondary);
}

.badge-spectator {
    background: var(--warning-color);
    color: white;
}

.vote-value {
    font-size: 1.5em;
    font-weight: bold;
    color: var(--accent-color);
}

/* Voting Panel */
.voting-panel {
    margin-top: auto;
    padding: 20px;
    background: var(--bg-card);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.cards-container {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-bottom: 20px;
}

.card {
    min-width: 60px;
    height: 80px;
    background: var(--bg-primary);
    border: none;
    border-radius: 8px;
    font-size: 1.2em;
    font-weight: bold;
    cursor: pointer;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
}

.card:hover:not(:disabled) {
    border-color: var(--accent-color);
    background: var(--bg-secondary);
}

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

.card.selected {
    background: var(--accent-color);
    color: white;
    border-color: var(--accent-color);
    cursor: default;
    pointer-events: none;
}

.voting-actions {
    display: flex;
    gap: 10px;
    justify-content: center;
    flex-wrap: wrap;
}

/* Reveal Section */
.reveal-section {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 20px;
    order: 2;
}

.btn-reveal {
    padding: 14px 40px;
    font-size: 1.2em;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 12px;
    cursor: pointer;
    font-weight: 600;
}

.btn-reveal:hover:not(:disabled) {
    background: var(--accent-hover);
}

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

.toggle-role-btn-top {
    font-size: 1.2em;
    padding: 10px 16px;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: 6px;
    font-size: 1em;
    cursor: pointer;
    font-weight: 500;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--accent-hover);
}

.btn-secondary {
    background: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover:not(:disabled) {
    background: var(--border-color);
}

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

.btn-icon {
    background: transparent;
    border: 1px solid var(--border-color);
    padding: 8px 12px;
}

.btn-small {
    padding: 6px 12px;
    font-size: 0.85em;
    background: var(--accent-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
}

.btn-small:hover {
    background: var(--accent-hover);
}

/* Side Panels */
.side-panel {
    position: fixed;
    top: 0;
    left: -400px;
    width: 400px;
    max-width: 90vw;
    height: 100vh;
    background: var(--bg-card);
    border-right: 1px solid var(--border-color);
    z-index: 1000;
    display: flex;
    flex-direction: column;
}

.side-panel.active {
    left: 0;
}

.panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px;
    border-bottom: 1px solid var(--border-color);
}

.panel-header h2 {
    font-size: 1.3em;
    color: var(--text-primary);
}

.panel-content {
    flex: 1;
    overflow-y: auto;
    padding: 20px;
}

#add-task-form {
    display: flex;
    gap: 10px;
    margin-bottom: 20px;
}

#add-task-form input {
    flex: 1;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-primary);
    color: var(--text-primary);
}

#tasks-list {
    list-style: none;
}

#tasks-list li {
    padding: 12px;
    margin-bottom: 8px;
    background: var(--bg-secondary);
    border-radius: 6px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

#tasks-list li.active {
    border: 2px solid var(--accent-color);
    background: var(--bg-card);
}

.setting-group {
    margin-bottom: 20px;
}

.setting-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-primary);
    font-weight: 500;
}

.setting-group select {
    width: 100%;
    padding: 10px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 1em;
}

/* Language Toggle */
.lang-toggle {
    display: flex;
    gap: 12px;
    margin-top: 30px;
    justify-content: center;
}

.lang-btn {
    padding: 8px 16px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    color: var(--text-primary);
    font-size: 0.95em;
    font-weight: 600;
}

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

.lang-toggle-wrapper {
    position: relative;
    display: inline-block;
}

.lang-menu {
    position: absolute;
    top: 50%;
    transform: translateY(-50%);
    left: calc(100% + 8px);
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    box-shadow: var(--shadow);
    z-index: 1001;
    min-width: 150px;
}

.lang-option {
    display: block;
    width: 100%;
    padding: 10px 15px;
    text-align: left;
    background: transparent;
    border: none;
    cursor: pointer;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
}

.lang-option:last-child {
    border-bottom: none;
}

.lang-option:hover {
    background: var(--bg-secondary);
}

/* Responsive Design */
@media (max-width: 768px) {
    .actions {
        grid-template-columns: 1fr;
    }
    
    /* On mobile: convert sidebar to top bar */
    #room-screen.screen.active {
        flex-direction: column;
    }
    
    .room-sidebar {
        width: 100%;
        height: auto;
        position: static;
        flex-direction: row;
        border-right: none;
        border-bottom: 2px solid var(--border-color);
        padding: 10px;
        gap: 8px;
        overflow-x: auto;
    }
    
    .sidebar-btn {
        width: 45px;
        height: 45px;
        font-size: 1.1em;
        flex-shrink: 0;
    }
    
    .sidebar-btn:before {
        left: auto;
        bottom: calc(100% + 10px);
        top: auto;
        transform: translateX(0);
    }
    
    .room-main {
        margin-left: 0;
    }
    
    .room-top-bar {
        flex-direction: row;
        justify-content: center;
        gap: 10px;
        padding: 15px;
    }
    
    .room-info {
        flex-direction: row;
        align-items: center;
        gap: 8px;
        order: 1;
    }
    
    .reveal-section {
        width: auto;
        flex-direction: row;
        order: 2;
    }
    
    .btn-reveal {
        width: auto;
        padding: 10px 20px;
        font-size: 1em;
    }
    
    .users-grid {
        grid-template-columns: repeat(auto-fill, minmax(80px, 1fr));
    }
    
    .cards-container {
        gap: 8px;
    }
    
    .card {
        min-width: 50px;
        height: 70px;
        font-size: 1em;
    }
    
    .side-panel {
        width: 100%;
        left: -100%;
    }
}

@media (max-width: 480px) {
    #start-screen .container {
        padding: 20px;
    }
    
    .logo h1 {
        font-size: 2em;
    }
    
    .users-grid {
        grid-template-columns: 1fr;
    }
    
    .card {
        min-width: 45px;
        height: 60px;
        font-size: 0.9em;
    }
}

/* Share Modal */
.share-modal {
    display: none;
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 30px;
    box-shadow: var(--shadow);
    backdrop-filter: blur(var(--glass-blur));
    z-index: 2000;
    min-width: 300px;
    text-align: center;
}

.share-modal.active {
    display: block;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translate(-50%, -40%);
    }
    to {
        opacity: 1;
        transform: translate(-50%, -50%);
    }
}

.share-modal h3 {
    margin-bottom: 15px;
    color: var(--text-primary);
}

.share-modal .room-link {
    background: var(--bg-secondary);
    padding: 12px 15px;
    border-radius: 10px;
    margin-bottom: 15px;
    word-break: break-all;
    color: var(--text-secondary);
    font-size: 0.9em;
    border: 1px solid var(--glass-border);
}

.share-modal .copy-btn {
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 10px;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.2s;
}

.share-modal .copy-btn:hover {
    background: var(--accent-hover);
    transform: scale(1.05);
}

.share-modal .copy-btn.copied {
    background: var(--success-color);
}

.share-backdrop {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.3);
    z-index: 1999;
    backdrop-filter: blur(3px);
}

.share-backdrop.active {
    display: block;
}