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

:root {
    --primary-color: #3498db;
    --secondary-color: #2ecc71;
    --accent-color: #e74c3c;
    --background-color: #ffffff;
    --surface-color: #f8f9fa;
    --text-primary: #2c3e50;
    --text-secondary: #7f8c8d;
    --border-color: #e1e8ed;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --border-radius: 8px;
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --background-color: #1a1a1a;
    --surface-color: #2d2d2d;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --border-color: #404040;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-primary);
    line-height: 1.6;
    transition: var(--transition);
}

/* Header Styles */
.header {
    background-color: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(10px);
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

.logo h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.logo {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
}

.nav {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.nav-btn {
    padding: 0.5rem 1rem;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
    font-weight: 500;
}

.nav-btn:hover,
.nav-btn.active {
    background-color: var(--primary-color);
    color: white;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.search-input {
    padding: 0.5rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--background-color);
    color: var(--text-primary);
    min-width: 200px;
}

.mockups-container p {
    margin-bottom: 1rem;
}

.theme-toggle {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    padding: 0.5rem;
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.theme-toggle:hover {
    background-color: var(--surface-color);
}

.btn-danger:hover {
    background-color: #c0392b;
}

/* Main Content */
.main {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
}

.section {
    display: none;
}

.section.active {
    display: block;
}

/* Generator Styles */
.generator-container {
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 2rem;
    align-items: start;
}

.palette-controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, auto));
    gap: 0.5rem;
    margin-bottom: 2rem;
    justify-content: start;
}

.generate-btn,
.shuffle-btn,
.export-btn,
.saved-palette-btn {
    padding: 0.5rem 1rem !important;
    white-space: nowrap;
}

.btn {
    padding: 0.75rem 1.5rem;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    font-weight: 600;
    transition: var(--transition);
    font-size: 0.9rem;
}

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

.btn-primary:hover {
    opacity: 0.9;
    transform: translateY(-1px);
}

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

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

.color-palette {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.color-slot {
    position: relative;
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow);
    transition: var(--transition);
    cursor: pointer;
    min-height: 120px;
}

.color-slot:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.15);
}

.color-preview {
    height: 80px;
    width: 100%;
}

.color-info {
    padding: 0.75rem;
    background-color: var(--surface-color);
    font-size: 0.8rem;
}

.color-hex {
    font-weight: 600;
    margin-bottom: 0.25rem;
    font-family: 'Courier New', monospace;
}

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

.color-actions {
    position: absolute;
    top: 0.5rem;
    right: 0.5rem;
    display: flex;
    gap: 0.25rem;
    opacity: 0;
    transition: var(--transition);
}

.color-slot:hover .color-actions {
    opacity: 1;
}

.color-action {
    background: rgba(255, 255, 255, 0.9);
    border: none;
    border-radius: 4px;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    font-size: 0.8rem;
    transition: var(--transition);
}

.color-action:hover {
    background: white;
    transform: scale(1.1);
}

.lock-btn.locked {
    color: var(--accent-color);
}

/* Controls Sidebar */
.controls-sidebar {
    background-color: var(--surface-color);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    position: sticky;
    top: 100px;
}

.control-group {
    margin-bottom: 2rem;
}

.control-group h3 {
    margin-bottom: 0.75rem;
    font-size: 1rem;
    color: var(--text-primary);
}

.control-select,
.control-slider {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--background-color);
    color: var(--text-primary);
}

.control-slider {
    padding: 0;
}

#base-color-picker {
    width: 100%;
    height: 40px;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
}

.theory-info,
.accessibility-info {
    background-color: var(--background-color);
    padding: 1rem;
    border-radius: var(--border-radius);
    border: 1px solid var(--border-color);
    font-size: 0.9rem;
    line-height: 1.4;
}

/* Saved Palettes */
.saved-palettes-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
    overflow-y: auto;
    max-height: 400px;
}

.saved-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

/* Delete button styles */
.btn-danger {
    background-color: #e74c3c;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

#clear-all-palettes {
    width: auto!important;
}

.saved-palette {
    background-color: var(--surface-color);
    border-radius: var(--border-radius);
    padding: 1rem;
    border: 1px solid var(--border-color);
    transition: var(--transition);
    cursor: pointer;
}

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

.saved-palette-colors {
    display: flex;
    height: 60px;
    border-radius: 4px;
    overflow: hidden;
    margin-bottom: 1rem;
}

.saved-palette-color {
    flex: 1;
}

.saved-palette-info h4 {
    margin-bottom: 0.5rem;
    font-size: 1rem;
}

.saved-palette-meta {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.saved-empty {
    text-align: center;
    color: var(--text-secondary);
    font-style: italic;
    padding: 2rem;
}

/* History Timeline */
.history-timeline {
    margin-top: 2rem;
    overflow-y: auto;
    max-height: 400px;
}

.history-item {
    background-color: var(--surface-color);
    padding: 1rem;
    border-radius: var(--border-radius);
    margin-bottom: 1rem;
    border-left: 4px solid var(--primary-color);
}

.history-colors {
    display: flex;
    height: 40px;
    border-radius: 4px;
    overflow: hidden;
    margin: 0.5rem 0;
}

.history-color {
    flex: 1;
}

.history-time {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.history-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

/* Delete button styles */
.btn-danger {
    background-color: #e74c3c;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

#clear-all-history {
    width: auto!important;
}

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

.modal.active {
    display: flex;
}

.modal-content {
    background-color: var(--background-color);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    max-width: 400px;
    width: 90%;
}

.modal-content h3 {
    margin-bottom: 1rem;
}

.modal-content input,
.modal-content textarea {
    width: 100%;
    padding: 0.75rem;
    margin-bottom: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--surface-color);
    color: var(--text-primary);
}

.modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: flex-end;
}

/* Responsive Design */
@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        align-items: stretch;
    }

    .nav {
        justify-content: center;
    }

    .header-controls {
        justify-content: center;
    }

    .generator-container {
        grid-template-columns: 1fr;
    }

    .controls-sidebar {
        position: static;
    }

    .palette-controls {
        justify-content: center;
    }

    .color-palette {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    }
}

@media (max-width: 480px) {
    .color-palette {
        grid-template-columns: 1fr 1fr;
    }

    .saved-palettes-grid {
        grid-template-columns: 1fr;
    }

    .palette-controls {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
    }
}

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

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

.mt-2 {
    margin-top: 2rem;
}

.mb-2 {
    margin-bottom: 2rem;
}

/* Loading Animation */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

.spinner {
    border: 2px solid var(--border-color);
    border-top: 2px solid var(--primary-color);
    border-radius: 50%;
    width: 20px;
    height: 20px;
    animation: spin 1s linear infinite;
    display: inline-block;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* High Contrast Mode */
.high-contrast {
    --background-color: #000000;
    --surface-color: #111111;
    --text-primary: #ffffff;
    --text-secondary: #cccccc;
    --border-color: #333333;
}

.high-contrast .color-slot {
    border: 2px solid white;
}

/* Dropdown Styles */
.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-toggle {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.dropdown-toggle::after {
    content: '';
    width: 0;
    height: 0;
    border-left: 4px solid transparent;
    border-right: 4px solid transparent;
    border-top: 4px solid currentColor;
    transition: var(--transition);
}

.dropdown:hover .dropdown-toggle::after {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%; 
    left: 0;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    max-width: 200px;
    z-index: 9999;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--transition);
    max-height: 400px;
    overflow-y: auto;
}

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

.dropdown-item {
    display: block;
    width: 100%;
    padding: 0.75rem 1rem;
    border: none;
    background: transparent;
    color: var(--text-primary);
    text-align: left;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.9rem;
    font-weight: 500;
}

.dropdown-item:hover {
    background: var(--primary-color);
    color: white;
}

.dropdown-divider {
    height: 1px;
    background: var(--border-color);
    margin: 0.25rem 0;
}

/* Dark theme adjustments */
[data-theme="dark"] .dropdown-menu {
    background: var(--surface-color);
    border-color: var(--border-color);
}

[data-theme="dark"] .dropdown-item:hover {
    background: var(--primary-color);
    color: white;
}