/* ============================================
   Kanban Board - Main Stylesheet
   ============================================ */

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

:root {
    /* Color Palette */
    --primary: #3498db;
    --primary-dark: #2980b9;
    --primary-light: #5dade2;

    --success: #2ecc71;
    --success-dark: #27ae60;
    --success-light: #58d68d;

    --danger: #e74c3c;
    --danger-dark: #c0392b;
    --danger-light: #ec7063;

    --warning: #f39c12;
    --warning-dark: #d68910;
    --warning-light: #f5b041;

    --info: #3498db;
    --info-dark: #2980b9;
    --info-light: #5dade2;

    /* Neutral Colors */
    --dark: #2c3e50;
    --dark-light: #34495e;
    --gray: #7f8c8d;
    --gray-light: #95a5a6;
    --light: #ecf0f1;
    --light-dark: #bdc3c7;
    --white: #ffffff;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-xxl: 3rem;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);

    /* Fonts */
    --font-base: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    --font-mono: 'Monaco', 'Courier New', monospace;
}

body {
    font-family: var(--font-base);
    font-size: 16px;
    line-height: 1.6;
    color: var(--dark);
    background-color: var(--light);
}

/* === Authentication Pages === */
.auth-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    padding: var(--spacing-lg);
}

.auth-container {
    width: 100%;
    max-width: 450px;
}

.auth-box {
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-xxl);
}

.auth-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.auth-header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: var(--spacing-sm);
}

.auth-header p {
    color: var(--gray);
    font-size: 1rem;
}

/* === Forms === */
.auth-form {
    margin-bottom: var(--spacing-lg);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-sm);
    font-weight: 600;
    color: var(--dark);
    font-size: 0.9rem;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group input[type="date"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: var(--spacing-md);
    border: 2px solid var(--light-dark);
    border-radius: var(--radius-md);
    font-size: 1rem;
    font-family: var(--font-base);
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

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

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

/* === Buttons === */
.btn {
    display: inline-block;
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: background-color 0.2s ease, transform 0.1s ease;
    font-family: var(--font-base);
}

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

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

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

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

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

.btn-success:hover {
    background-color: var(--success-dark);
}

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

.btn-danger:hover {
    background-color: var(--danger-dark);
}

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

.btn-warning:hover {
    background-color: var(--warning-dark);
}

.btn-secondary {
    background-color: var(--gray-light);
    color: var(--white);
}

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

#myCardsToggle.active {
    background-color: var(--primary);
    color: var(--white);
}

#myCardsToggle.active:hover {
    background-color: var(--primary-dark);
}

.btn-block {
    display: block;
    width: 100%;
}

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

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-xxl);
    font-size: 1.125rem;
}

/* === Alerts === */
.alert {
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
    border-left: 4px solid;
}

.alert ul {
    margin: 0;
    padding-left: var(--spacing-lg);
}

.alert li {
    margin-bottom: var(--spacing-xs);
}

.alert li:last-child {
    margin-bottom: 0;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border-left-color: var(--success);
}

.alert-error {
    background-color: #f8d7da;
    color: #721c24;
    border-left-color: var(--danger);
}

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
    border-left-color: var(--warning);
}

.alert-info {
    background-color: #d1ecf1;
    color: #0c5460;
    border-left-color: var(--info);
}

/* === Auth Footer === */
.auth-footer {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--light);
}

.auth-footer p {
    color: var(--gray);
    font-size: 0.9rem;
}

.auth-footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
}

.auth-footer a:hover {
    text-decoration: underline;
}

/* === Responsive === */
@media (max-width: 768px) {
    .auth-box {
        padding: var(--spacing-xl);
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .auth-header h1 {
        font-size: 1.5rem;
    }
}

/* === Main Header === */
.main-header {
    background: var(--white);
    border-bottom: 1px solid var(--light);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--dark);
    text-decoration: none;
    display: flex;
    align-items: center;
}

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

.user-menu {
    position: relative;
}

.user-menu-toggle {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--white);
    border: 1px solid var(--light);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all 0.2s ease;
}

.user-menu-toggle:hover {
    background: var(--light);
    border-color: var(--light-dark);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 600;
    font-size: 0.875rem;
}

.user-name {
    font-weight: 600;
    color: var(--dark);
    font-size: 0.9rem;
}

.user-menu-dropdown {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--white);
    border: 1px solid var(--light);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    min-width: 220px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.2s ease;
}

.user-menu-dropdown.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.user-menu-header {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--light);
}

.user-menu-name {
    font-weight: 600;
    color: var(--dark);
    margin-bottom: var(--spacing-xs);
}

.user-menu-email {
    font-size: 0.875rem;
    color: var(--gray);
}

.user-menu-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md);
    color: var(--dark);
    text-decoration: none;
    transition: background-color 0.2s ease;
}

.user-menu-item:hover {
    background: var(--light);
}

.user-menu-item.text-danger {
    color: var(--danger);
}

.user-menu-divider {
    height: 1px;
    background: var(--light);
}

/* === Dashboard === */
.dashboard-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-xxl) var(--spacing-lg);
}

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

.dashboard-header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark);
}

/* === Boards Grid === */
.boards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
}

.board-card {
    background: var(--white);
    border: 2px solid var(--light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    text-decoration: none;
    color: var(--dark);
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.board-card:hover {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.board-card-header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.board-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--dark);
    margin: 0;
    flex: 1;
}

.badge {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.badge-secondary {
    background: var(--gray-light);
    color: var(--white);
}

.board-description {
    color: var(--gray);
    font-size: 0.9rem;
    line-height: 1.5;
    margin: 0;
}

.board-stats {
    display: flex;
    gap: var(--spacing-lg);
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--light);
}

.stat {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--gray);
    font-size: 0.875rem;
}

.board-footer {
    margin-top: auto;
}

.text-muted {
    color: var(--gray);
    font-size: 0.875rem;
}

/* === Empty State === */
.empty-state {
    text-align: center;
    padding: var(--spacing-xxl) var(--spacing-lg);
    max-width: 600px;
    margin: 0 auto;
}

.empty-state svg {
    color: var(--gray-light);
    margin-bottom: var(--spacing-lg);
}

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

.empty-state p {
    color: var(--gray);
    font-size: 1rem;
    margin-bottom: var(--spacing-xl);
}

/* === Page Container === */
.page-container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--spacing-xxl) var(--spacing-lg);
}

.page-header {
    margin-bottom: var(--spacing-xl);
}

.page-header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--dark);
    margin-bottom: var(--spacing-md);
}

.back-link {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--primary);
    text-decoration: none;
    font-weight: 600;
    margin-bottom: var(--spacing-md);
    transition: color 0.2s ease;
}

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

/* === Forms === */
.form-container {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
}

.standard-form {
    margin-bottom: var(--spacing-xl);
}

.required {
    color: var(--danger);
}

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

/* === Info Box === */
.info-box {
    background: var(--light);
    border-left: 4px solid var(--info);
    border-radius: var(--radius-md);
    padding: var(--spacing-lg);
}

.info-box h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--dark);
    margin-bottom: var(--spacing-md);
}

.info-box ul {
    list-style: none;
    padding-left: 0;
}

.info-box li {
    padding-left: var(--spacing-lg);
    margin-bottom: var(--spacing-sm);
    position: relative;
}

.info-box li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success);
    font-weight: 700;
}

/* === Responsive === */
@media (max-width: 768px) {
    .header-container {
        padding: 0 var(--spacing-md);
    }

    .user-name {
        display: none;
    }

    .dashboard-container,
    .page-container {
        padding: var(--spacing-lg) var(--spacing-md);
    }

    .dashboard-header {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }

    .boards-grid {
        grid-template-columns: 1fr;
    }

    .form-actions {
        flex-direction: column-reverse;
    }

    .form-actions .btn {
        width: 100%;
    }
}

/* === Kanban Board === */
.board-container {
    padding: var(--spacing-lg);
    height: calc(100vh - 64px);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.board-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--light);
}

.board-title-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.back-link-icon {
    color: var(--primary);
    transition: color 0.2s ease;
    display: flex;
    align-items: center;
}

.back-link-icon:hover {
    color: var(--primary-dark);
}

.board-title-section h1 {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--dark);
    margin: 0;
}

.board-role-badge {
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

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

.badge-member {
    background: var(--gray-light);
    color: var(--white);
}

.board-search {
    flex: 1;
    max-width: 400px;
    margin: 0 var(--spacing-lg);
}

.search-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.search-icon {
    position: absolute;
    left: var(--spacing-sm);
    color: var(--gray);
    pointer-events: none;
}

.search-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    padding-left: calc(var(--spacing-md) + 20px);
    padding-right: calc(var(--spacing-md) + 24px);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    background: var(--white);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.search-input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

.search-clear-btn {
    position: absolute;
    right: var(--spacing-xs);
    background: none;
    border: none;
    color: var(--gray);
    cursor: pointer;
    padding: var(--spacing-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    transition: background-color 0.2s, color 0.2s;
}

.search-clear-btn:hover {
    background: var(--bg-secondary);
    color: var(--dark);
}

.board-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* === Board Columns === */
.board-columns {
    display: flex;
    gap: var(--spacing-lg);
    overflow-x: auto;
    overflow-y: hidden;
    flex: 1;
    padding-bottom: var(--spacing-md);
}

.column {
    background: var(--light);
    border-radius: var(--radius-lg);
    min-width: 300px;
    max-width: 300px;
    display: flex;
    flex-direction: column;
    height: fit-content;
    max-height: calc(100vh - 200px);
}

.column-header {
    padding: var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-radius: var(--radius-lg) var(--radius-lg) 0 0;
}

.column-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--dark);
    margin: 0;
}

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

.card-count {
    background: var(--gray-light);
    color: var(--white);
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.btn-icon {
    background: none;
    border: none;
    padding: var(--spacing-xs);
    cursor: pointer;
    color: var(--gray);
    transition: color 0.2s ease;
}

.btn-icon:hover {
    color: var(--dark);
}

/* === Cards Container === */
.cards-container {
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    overflow-y: auto;
    flex: 1;
    min-height: 100px;
}

/* === Card === */
.card {
    background: var(--white);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    box-shadow: var(--shadow-sm);
    cursor: pointer;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.card-ghost {
    opacity: 0.5;
}

.card-hidden {
    display: none;
}

.card-dragging {
    opacity: 0.8;
    transform: rotate(2deg);
}

/* Column drag styles */
.column-ghost {
    opacity: 0.4;
    background: var(--bg-tertiary);
}

.column-dragging {
    opacity: 0.8;
}

.column-header {
    cursor: move;
}

.card-color-bar {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
}

.card-content {
    position: relative;
}

.card-title {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--dark);
    margin: 0 0 var(--spacing-sm) 0;
    line-height: 1.4;
}

.card-description {
    font-size: 0.85rem;
    color: var(--gray);
    margin: 0 0 var(--spacing-sm) 0;
    line-height: 1.5;
}

.card-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-sm);
}

.card-due {
    display: flex;
    align-items: center;
    gap: 4px;
    padding: 2px 6px;
    background: var(--light);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--gray);
}

.card-due.overdue {
    background: var(--danger-light);
    color: var(--white);
}

.card-priority {
    padding: 2px 8px;
    border-radius: var(--radius-sm);
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
}

.priority-low {
    background: #d4edda;
    color: #155724;
}

.priority-high {
    background: #fff3cd;
    color: #856404;
}

.priority-urgent {
    background: #f8d7da;
    color: #721c24;
}

.card-stat {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 0.75rem;
    color: var(--gray);
}

.card-assignee {
    margin-top: var(--spacing-xs);
}

.user-avatar-sm {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--white);
    font-weight: 600;
    font-size: 0.7rem;
}

/* === Add Card Button === */
.add-card-btn {
    margin: var(--spacing-sm) var(--spacing-md) var(--spacing-md);
    padding: var(--spacing-sm);
    background: none;
    border: 2px dashed var(--light-dark);
    border-radius: var(--radius-md);
    color: var(--gray);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    font-weight: 600;
}

.add-card-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(52, 152, 219, 0.05);
}

/* === Add Column === */
.add-column-container {
    min-width: 280px;
    display: flex;
    align-items: flex-start;
}

.add-column-btn {
    padding: var(--spacing-md);
    background: var(--light);
    border: 2px dashed var(--light-dark);
    border-radius: var(--radius-lg);
    color: var(--gray);
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    font-weight: 600;
    width: 100%;
}

.add-column-btn:hover {
    border-color: var(--primary);
    color: var(--primary);
    background: rgba(52, 152, 219, 0.05);
}

/* === Modals === */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 2000;
    opacity: 0;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.modal.show {
    opacity: 1;
    pointer-events: all;
}

.modal-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
}

.modal-content {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: var(--white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    max-width: 500px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-large {
    max-width: 800px;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    border-bottom: 1px solid var(--light);
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0;
    color: var(--dark);
}

.modal-close {
    background: none;
    border: none;
    font-size: 2rem;
    line-height: 1;
    color: var(--gray);
    cursor: pointer;
    padding: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: color 0.2s ease;
}

.modal-close:hover {
    color: var(--dark);
}

.modal-body {
    padding: var(--spacing-lg);
}

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

/* === Card Detail Modal === */
.card-detail-grid {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: var(--spacing-xl);
}

.card-detail-main {
    min-height: 200px;
}

.card-detail-sidebar {
    background: var(--light);
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
}

.detail-item {
    margin-bottom: var(--spacing-lg);
}

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

.detail-item strong {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--dark);
    font-size: 0.875rem;
}

.detail-item p {
    margin: 0;
    color: var(--gray);
}

.detail-actions {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--light-dark);
}

.card-comments {
    margin-top: var(--spacing-xl);
}

.card-comments h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

.comment {
    background: var(--light);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-md);
}

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

.comment p {
    margin: 0;
    color: var(--dark);
}

/* === Notifications === */
.notification {
    position: fixed;
    top: 80px;
    right: 20px;
    background: var(--white);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 3000;
    min-width: 250px;
    opacity: 0;
    transform: translateX(400px);
    transition: all 0.3s ease;
}

.notification.show {
    opacity: 1;
    transform: translateX(0);
}

.notification-success {
    border-left: 4px solid var(--success);
}

.notification-error {
    border-left: 4px solid var(--danger);
}

.notification-info {
    border-left: 4px solid var(--info);
}

/* === Context Menu === */
.context-menu {
    position: fixed;
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 2000;
    min-width: 180px;
    opacity: 0;
    transform: scale(0.95);
    transition: all 0.15s ease;
}

.context-menu.show {
    opacity: 1;
    transform: scale(1);
}

.context-menu-item {
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: background-color 0.2s;
}

.context-menu-item:hover {
    background-color: var(--bg-secondary);
}

.context-menu-item:first-child {
    border-top-left-radius: var(--radius-md);
    border-top-right-radius: var(--radius-md);
}

.context-menu-item:last-child {
    border-bottom-left-radius: var(--radius-md);
    border-bottom-right-radius: var(--radius-md);
}

.context-menu-item svg {
    flex-shrink: 0;
}

.context-menu-item.disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.context-menu-item.disabled:hover {
    background-color: transparent;
}

/* === Color Picker === */
.color-picker {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.color-picker input[type="color"] {
    width: 60px;
    height: 40px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    padding: 2px;
}

.color-picker .color-preview {
    width: 40px;
    height: 40px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

/* === Board Members === */
.members-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    max-height: 60vh;
    overflow-y: auto;
}

.member-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    gap: var(--spacing-md);
}

.member-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex: 1;
    min-width: 0;
}

.member-name {
    font-weight: 600;
    color: var(--text-primary);
}

.member-email {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

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

.member-role-select {
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--white);
    font-size: 0.875rem;
}

.member-role-select:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    background: var(--bg-secondary);
}

.btn-icon.btn-danger {
    color: var(--danger);
}

.btn-icon.btn-danger:hover {
    background-color: rgba(231, 76, 60, 0.1);
}

/* === Activity Log === */
.activity-log {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    max-height: 60vh;
    overflow-y: auto;
}

.activity-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-left: 3px solid var(--border);
    transition: all 0.2s;
}

.activity-item:hover {
    background: var(--bg-secondary);
    border-left-color: var(--primary);
}

.activity-icon {
    flex-shrink: 0;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-secondary);
    border-radius: 50%;
    color: var(--text-secondary);
}

.activity-content {
    flex: 1;
    min-width: 0;
}

.activity-text {
    color: var(--text-primary);
    line-height: 1.5;
    margin-bottom: var(--spacing-xs);
}

.activity-text em {
    color: var(--primary);
    font-style: normal;
}

.activity-time {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

/* === Comments === */
.card-comments-section {
    margin-top: var(--spacing-lg);
}

.card-comments-section h3 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.comments-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
    max-height: 400px;
    overflow-y: auto;
    padding-right: var(--spacing-sm);
}

.comment {
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    transition: all 0.2s;
}

.comment:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

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

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

.comment-actions {
    display: flex;
    gap: var(--spacing-xs);
    opacity: 0;
    transition: opacity 0.2s;
}

.comment:hover .comment-actions {
    opacity: 1;
}

.comment-body {
    margin-left: 40px;
}

.comment-text {
    color: var(--text-primary);
    line-height: 1.5;
    white-space: pre-wrap;
    word-wrap: break-word;
}

.add-comment-form {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border);
}

.add-comment-form textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.875rem;
    resize: vertical;
    margin-bottom: var(--spacing-sm);
}

.add-comment-form textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.edit-comment-form textarea {
    width: 100%;
    padding: var(--spacing-sm);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.875rem;
    resize: vertical;
    margin-bottom: var(--spacing-sm);
}

.edit-comment-form textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.edit-comment-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.user-avatar-sm {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-weight: 600;
    font-size: 0.75rem;
    flex-shrink: 0;
}

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

/* === Attachments === */
.card-attachments-section {
    margin-top: var(--spacing-lg);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border);
}

.card-attachments-section h3 {
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

.attachments-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.attachment-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border-radius: var(--radius-md);
    transition: all 0.2s;
}

.attachment-item:hover {
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.1);
}

.attachment-icon {
    font-size: 1.5rem;
    flex-shrink: 0;
}

.attachment-info {
    flex: 1;
    min-width: 0;
}

.attachment-name {
    font-weight: 500;
    color: var(--primary);
    text-decoration: none;
    display: block;
    margin-bottom: var(--spacing-xs);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.attachment-name:hover {
    text-decoration: underline;
}

.attachment-meta {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.add-attachment-form {
    margin-top: var(--spacing-md);
}

/* === Color Swatch Picker === */
.color-swatch-picker {
    margin-top: var(--spacing-xs);
}

.color-swatches {
    display: grid;
    grid-template-columns: repeat(8, 1fr);
    gap: var(--spacing-sm);
    max-width: 100%;
}

.color-swatch {
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius);
    cursor: pointer;
    border: 2px solid transparent;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.color-swatch:hover {
    transform: scale(1.1);
    border-color: rgba(0, 0, 0, 0.3);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.15);
}

.color-swatch.selected {
    border-color: var(--dark);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.2);
}

.color-swatch .checkmark {
    color: white;
    font-size: 1.5rem;
    font-weight: bold;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
    line-height: 1;
}

/* === Responsive === */
@media (max-width: 768px) {
    .board-columns {
        flex-direction: column;
    }

    .column {
        min-width: 100%;
        max-width: 100%;
    }

    .card-detail-grid {
        grid-template-columns: 1fr;
    }

    .card-detail-sidebar {
        order: -1;
    }

    .color-swatches {
        grid-template-columns: repeat(4, 1fr);
    }
}