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

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

:root {
    /* Encouraging Color Scheme */
    --primary-green: #2ecc71;
    --primary-green-dark: #27ae60;
    --secondary-blue: #3498db;
    --secondary-blue-dark: #2980b9;
    --warm-orange: #e67e22;
    --warm-yellow: #f39c12;
    --success-green: #27ae60;
    --error-red: #e74c3c;
    
    /* Neutral Colors */
    --bg-light: #f8f9fa;
    --bg-white: #ffffff;
    --text-dark: #2c3e50;
    --text-medium: #7f8c8d;
    --text-light: #95a5a6;
    --border-color: #e0e0e0;
    --shadow-light: rgba(0, 0, 0, 0.1);
    --shadow-medium: rgba(0, 0, 0, 0.15);
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

body {
    font-family: var(--font-family);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: var(--bg-light);
    min-height: 100vh;
}

/* ===================================
   Authentication Overlay
   =================================== */

.auth-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--secondary-blue) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: var(--spacing-md);
}

.auth-overlay.hidden {
    display: none;
}

.auth-container {
    background: var(--bg-white);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: 0 10px 40px var(--shadow-medium);
    max-width: 400px;
    width: 100%;
    text-align: center;
}

.auth-container h1 {
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
    font-size: 1.75rem;
}

.auth-container p {
    color: var(--text-medium);
    margin-bottom: var(--spacing-lg);
}

.auth-form label {
    display: block;
    text-align: left;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--text-dark);
}

.auth-form input[type="text"] {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    margin-bottom: var(--spacing-md);
    transition: border-color 0.3s ease;
}

.auth-form input[type="text"]:focus {
    outline: none;
    border-color: var(--primary-green);
}

.auth-form button {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--primary-green);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease;
    min-height: 44px;
}

.auth-form button:hover {
    background: var(--primary-green-dark);
}

.auth-form button:active {
    transform: translateY(1px);
}

/* ===================================
   Main Application Container
   =================================== */

.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

.app-container.hidden {
    display: none;
}

/* ===================================
   Header
   =================================== */

.app-header {
    background: linear-gradient(135deg, var(--primary-green), var(--primary-green-dark));
    color: white;
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    margin-bottom: var(--spacing-lg);
    box-shadow: 0 4px 12px var(--shadow-medium);
    text-align: center;
}

.app-header h1 {
    font-size: 2rem;
    font-weight: 700;
}

/* ===================================
   Footer
   =================================== */

.app-footer {
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-lg);
    text-align: center;
}

.user-info {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-md);
    font-size: 0.95rem;
    color: var(--text-medium);
}

.logout-btn {
    background: var(--text-light);
    color: white;
    border: none;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.2s ease;
}

.logout-btn:hover {
    background: var(--text-medium);
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.user-info span {
    color: var(--text-medium);
    font-weight: 500;
}

.logout-btn {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--text-light);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
    min-height: 44px;
    min-width: 44px;
}

.logout-btn:hover {
    background: var(--text-medium);
}

/* ===================================
   Team Progress Section
   =================================== */

.team-progress-section {
    background: linear-gradient(135deg, var(--primary-green) 0%, var(--secondary-blue) 100%);
    color: white;
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    box-shadow: 0 4px 12px var(--shadow-medium);
    margin-bottom: var(--spacing-lg);
    text-align: center;
}

.team-progress-section h2 {
    font-size: 1.75rem;
    margin-bottom: var(--spacing-md);
}

.team-stats {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.team-word-count {
    font-size: 1.5rem;
    font-weight: 600;
}

.team-word-count span {
    font-size: 2rem;
    font-weight: 700;
}

.team-percentage {
    font-size: 2.5rem;
    font-weight: 700;
}

.progress-bar-container {
    background: rgba(255, 255, 255, 0.3);
    border-radius: var(--radius-lg);
    overflow: hidden;
    height: 30px;
    margin-bottom: var(--spacing-md);
}

.progress-bar-container.large {
    height: 50px;
}

.progress-bar {
    width: 100%;
    height: 100%;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: white;
    border-radius: var(--radius-lg);
    transition: width 0.5s ease;
    width: 0%;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.motivation-message {
    font-size: 1.125rem;
    font-style: italic;
    opacity: 0.95;
}

/* ===================================
   Individual Writers Section
   =================================== */

.writers-section {
    margin-bottom: var(--spacing-lg);
}

.writers-section h2 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

.writers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.writer-card {
    background: var(--bg-white);
    padding: var(--spacing-md);
    border-radius: var(--radius-lg);
    box-shadow: 0 2px 8px var(--shadow-light);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.writer-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 4px 16px var(--shadow-medium);
}

.writer-name {
    font-size: 1.25rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-sm);
}

.writer-stats {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-sm);
}

.writer-stats .word-count {
    font-size: 1rem;
    color: var(--text-medium);
}

.writer-stats .word-count .count {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-green);
}

.writer-stats .percentage {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--secondary-blue);
}

.writer-card .progress-bar-container {
    background: var(--bg-light);
    height: 20px;
    margin-bottom: var(--spacing-sm);
}

.writer-card .progress-fill {
    background: linear-gradient(90deg, var(--primary-green) 0%, var(--secondary-blue) 100%);
}

.writer-meta {
    margin-top: var(--spacing-sm);
}

.last-updated {
    font-size: 0.875rem;
    color: var(--text-light);
    margin-bottom: var(--spacing-xs);
}

.last-sentence {
    font-size: 0.875rem;
    color: var(--text-medium);
    font-style: italic;
    padding: var(--spacing-xs);
    background: var(--bg-light);
    border-radius: var(--radius-sm);
    min-height: 1.5rem;
}

.last-sentence:empty {
    display: none;
}

/* ===================================
   Update Section & Forms
   =================================== */

.update-section,
.chart-section,
.message-board-section {
    background: var(--bg-white);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: 0 2px 8px var(--shadow-light);
    margin-bottom: var(--spacing-lg);
}

.update-section h2,
.chart-section h2,
.message-board-section h2 {
    font-size: 1.5rem;
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
}

.progress-form,
.message-form {
    max-width: 600px;
}

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
    color: var(--text-dark);
}

.toggle-label {
    display: inline-flex;
    align-items: center;
    margin-right: var(--spacing-md);
    margin-bottom: var(--spacing-xs);
    cursor: pointer;
    font-weight: 400;
    min-height: 44px;
}

.toggle-label input[type="radio"] {
    margin-right: var(--spacing-xs);
    cursor: pointer;
    width: 20px;
    height: 20px;
}

.form-group input[type="number"],
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: var(--font-family);
    transition: border-color 0.3s ease;
}

.form-group input[type="number"]:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-green);
}

.form-group textarea {
    resize: vertical;
    min-height: 80px;
}

.submit-btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    background: var(--primary-green);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.3s ease;
    min-height: 44px;
    min-width: 44px;
}

.submit-btn:hover {
    background: var(--primary-green-dark);
}

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

/* ===================================
   Chart Section
   =================================== */

.chart-controls {
    margin-bottom: var(--spacing-md);
}

.chart-toggle-btn {
    padding: var(--spacing-xs) var(--spacing-md);
    background: var(--secondary-blue);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    cursor: pointer;
    transition: background-color 0.3s ease;
    min-height: 44px;
    min-width: 44px;
}

.chart-toggle-btn:hover {
    background: var(--secondary-blue-dark);
}

.chart-container {
    position: relative;
    height: 400px;
    width: 100%;
}

/* ===================================
   Message Board
   =================================== */

/* Hide message board - keeping code for potential future use */
.message-board-section {
    display: none;
}

.message-feed {
    margin-top: var(--spacing-lg);
    max-height: 600px;
    overflow-y: auto;
    padding: var(--spacing-sm);
    background: var(--bg-light);
    border-radius: var(--radius-md);
}

.no-messages {
    text-align: center;
    color: var(--text-light);
    padding: var(--spacing-lg);
    font-style: italic;
}

.message-item {
    background: var(--bg-white);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-sm);
    box-shadow: 0 1px 4px var(--shadow-light);
}

.message-item:last-child {
    margin-bottom: 0;
}

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xs);
}

.message-author {
    font-weight: 600;
    color: var(--primary-green);
}

.message-time {
    font-size: 0.875rem;
    color: var(--text-light);
}

.message-text {
    color: var(--text-dark);
    line-height: 1.5;
    word-wrap: break-word;
}

/* ===================================
   Error & Success Messages
   =================================== */

.error-message,
.success-message {
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    margin-top: var(--spacing-sm);
    font-size: 0.875rem;
    display: none;
}

.error-message {
    background: #fee;
    color: var(--error-red);
    border: 1px solid var(--error-red);
}

.success-message {
    background: #efe;
    color: var(--success-green);
    border: 1px solid var(--success-green);
}

.error-message:not(:empty),
.success-message:not(:empty) {
    display: block;
}

/* ===================================
   Responsive Design - Mobile
   =================================== */

@media (max-width: 768px) {
    :root {
        --spacing-xl: 2rem;
        --spacing-lg: 1.5rem;
    }
    
    .app-container {
        padding: var(--spacing-sm);
    }
    
    .app-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .app-header h1 {
        font-size: 1.25rem;
    }
    
    .team-progress-section {
        padding: var(--spacing-lg);
    }
    
    .team-progress-section h2 {
        font-size: 1.5rem;
    }
    
    .team-word-count {
        font-size: 1.25rem;
    }
    
    .team-word-count span {
        font-size: 1.5rem;
    }
    
    .team-percentage {
        font-size: 2rem;
    }
    
    .team-stats {
        gap: var(--spacing-sm);
    }
    
    .writers-grid {
        grid-template-columns: 1fr;
    }
    
    .update-section,
    .chart-section,
    .message-board-section {
        padding: var(--spacing-md);
    }
    
    .chart-container {
        height: 300px;
    }
    
    .toggle-label {
        display: flex;
        margin-right: 0;
        margin-bottom: var(--spacing-sm);
    }
}

/* ===================================
   Responsive Design - Tablet
   =================================== */

@media (min-width: 769px) and (max-width: 1024px) {
    .writers-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ===================================
   Responsive Design - Desktop
   =================================== */

@media (min-width: 1025px) {
    .writers-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* ===================================
   Accessibility Enhancements
   =================================== */

/* Focus visible for keyboard navigation */
button:focus-visible,
input:focus-visible,
textarea:focus-visible {
    outline: 3px solid var(--secondary-blue);
    outline-offset: 2px;
}

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

/* High contrast mode support */
@media (prefers-contrast: high) {
    :root {
        --border-color: #000;
        --text-light: #666;
    }
    
    .progress-bar-container {
        border: 2px solid currentColor;
    }
}

/* ===================================
   Utility Classes
   =================================== */

.hidden {
    display: none !important;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border-width: 0;
}

/* ===================================
   Progress History Section
   =================================== */

.history-section {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 2px 8px var(--shadow-light);
    margin-bottom: var(--spacing-lg);
}

.history-section h2 {
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
}

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

.no-history {
    text-align: center;
    color: var(--text-light);
    padding: var(--spacing-lg);
    font-style: italic;
}

.history-entry {
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-md);
    transition: box-shadow 0.2s ease;
}

.history-entry:hover {
    box-shadow: 0 2px 6px var(--shadow-light);
}

.history-entry-info {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.history-entry-main {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.history-word-count {
    font-size: 1.25rem;
    font-weight: bold;
    color: var(--primary-green);
}

.history-change {
    font-size: 0.9rem;
    color: var(--text-medium);
}

.history-change.positive {
    color: var(--success-green);
}

.history-change.negative {
    color: var(--error-red);
}

.history-timestamp {
    font-size: 0.85rem;
    color: var(--text-light);
}

.history-sentence {
    font-size: 0.9rem;
    color: var(--text-medium);
    font-style: italic;
    margin-top: var(--spacing-xs);
}

.history-actions {
    display: flex;
    gap: var(--spacing-xs);
}

.history-btn {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: none;
    border-radius: var(--radius-sm);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}

.history-btn-edit {
    background: var(--secondary-blue);
    color: white;
}

.history-btn-edit:hover {
    background: var(--secondary-blue-dark);
}

.history-btn-delete {
    background: var(--error-red);
    color: white;
}

.history-btn-delete:hover {
    background: #c0392b;
}

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

/* Edit Modal */
.edit-modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.edit-modal.active {
    display: flex;
}

.edit-modal-content {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    max-width: 500px;
    width: 90%;
    box-shadow: 0 4px 20px var(--shadow-medium);
}

.edit-modal-content h3 {
    margin-bottom: var(--spacing-xs);
    color: var(--text-dark);
}

.edit-entry-date {
    color: var(--text-medium);
    font-size: 0.95rem;
    margin-bottom: var(--spacing-md);
}

.form-help {
    display: block;
    color: var(--text-light);
    font-size: 0.85rem;
    margin-top: var(--spacing-xs);
}

.edit-modal-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
    margin-top: var(--spacing-md);
}

.modal-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    border-radius: var(--radius-md);
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}

.modal-btn-cancel {
    background: var(--text-light);
    color: white;
}

.modal-btn-cancel:hover {
    background: var(--text-medium);
}

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

.modal-btn-save:hover {
    background: var(--primary-green-dark);
}

@media (max-width: 768px) {
    .history-entry {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .history-actions {
        width: 100%;
        justify-content: flex-end;
    }
}

/* ===================================
   Message Board Section
   =================================== */

.message-board-section {
    background: var(--bg-white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    box-shadow: 0 2px 8px var(--shadow-light);
    margin-bottom: var(--spacing-lg);
}

.message-board-section h2 {
    color: var(--text-dark);
    margin-bottom: var(--spacing-md);
    font-size: 1.5rem;
}

.message-feed {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
    max-height: 500px;
    overflow-y: auto;
    padding: var(--spacing-sm);
}

.no-messages {
    text-align: center;
    color: var(--text-light);
    padding: var(--spacing-lg);
    font-style: italic;
}

.message {
    background: var(--bg-light);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: box-shadow 0.2s ease;
}

.message:hover {
    box-shadow: 0 2px 6px var(--shadow-light);
}

.message-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-xs);
    gap: var(--spacing-sm);
}

.message-header-left {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.message-author {
    color: var(--primary-green-dark);
    font-size: 0.95rem;
}

.message-time {
    color: var(--text-light);
    font-size: 0.85rem;
}

.message-text {
    color: var(--text-dark);
    line-height: 1.5;
    word-wrap: break-word;
}

.message-delete-btn {
    background: var(--error-red);
    color: white;
    border: none;
    padding: 4px 12px;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.message-delete-btn:hover {
    background: #c0392b;
}

.message-form {
    border-top: 1px solid var(--border-color);
    padding-top: var(--spacing-md);
}

@media (max-width: 768px) {
    .message-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .message-delete-btn {
        align-self: flex-end;
    }
}

/* ===================================
   Pace Indicators
   =================================== */

.pace-indicator {
    font-size: 0.95rem;
    font-weight: 600;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    text-align: center;
    margin: var(--spacing-xs) 0;
}

.pace-indicator.ahead {
    background: rgba(46, 204, 113, 0.15);
    color: var(--success-green);
    border: 1px solid rgba(46, 204, 113, 0.3);
}

.pace-indicator.on-track {
    background: rgba(52, 152, 219, 0.15);
    color: var(--secondary-blue);
    border: 1px solid rgba(52, 152, 219, 0.3);
}

.pace-indicator.behind {
    background: rgba(243, 156, 18, 0.15);
    color: var(--warm-orange);
    border: 1px solid rgba(243, 156, 18, 0.3);
}

#team-pace {
    font-size: 1.1rem;
    margin: var(--spacing-sm) 0;
}

.writer-pace {
    font-size: 0.85rem;
}