/* 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;
    line-height: 1.6;
    color: #333;
    background-color: #f5f7fa;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
    padding: 2rem 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 1rem;
}

/* Navigation */
.navbar {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    padding: 1rem 0;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
    text-decoration: none;
}

.nav-links {
    display: flex;
    list-style: none;
    align-items: center;
    gap: 1.5rem;
}

.nav-links a {
    color: white;
    text-decoration: none;
    transition: opacity 0.3s;
}

.nav-links a:hover {
    opacity: 0.8;
}

.user-info {
    color: rgba(255,255,255,0.9);
    font-weight: 500;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.5rem 1rem;
    background-color: #667eea;
    color: white;
    text-decoration: none;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    font-size: 1rem;
    transition: all 0.3s;
    font-weight: 500;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.btn-primary {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.btn-secondary {
    background-color: #6c757d;
}

.btn-danger {
    background-color: #dc3545;
}

.btn-success {
    background-color: #28a745;
}

.btn-sm {
    padding: 0.375rem 0.75rem;
    font-size: 0.875rem;
}

.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1.125rem;
}

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

.btn-icon {
    background: none;
    border: none;
    color: #dc3545;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.25rem 0.5rem;
    line-height: 1;
    transition: opacity 0.3s;
}

.btn-icon:hover {
    opacity: 0.7;
}

/* Flash Messages */
.flash-messages {
    margin: 1rem 0;
}

.alert {
    padding: 1rem;
    border-radius: 6px;
    margin-bottom: 1rem;
}

.alert-success {
    background-color: #d4edda;
    border: 1px solid #c3e6cb;
    color: #155724;
}

.alert-error {
    background-color: #f8d7da;
    border: 1px solid #f5c6cb;
    color: #721c24;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 4rem 2rem;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
    border-radius: 12px;
    margin-bottom: 3rem;
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.hero .subtitle {
    font-size: 1.25rem;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* Features */
.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin-bottom: 3rem;
}

.feature-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.feature-card:hover {
    transform: translateY(-5px);
}

.feature-card h3 {
    color: #667eea;
    margin-bottom: 0.5rem;
}

/* Page Header */
.page-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.page-header h1 {
    color: #333;
    font-size: 2rem;
}

/* Search Bar */
.search-bar {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

.search-form {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.search-form input[type="text"] {
    flex: 1;
    min-width: 200px;
    padding: 0.75rem;
    border: 2px solid #e1e8ed;
    border-radius: 6px;
    font-size: 1rem;
}

.search-form input[type="text"]:focus {
    outline: none;
    border-color: #667eea;
}

/* Palette Grid */
.palette-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.palette-card {
    background: white;
    padding: 1.5rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
    transition: transform 0.3s, box-shadow 0.3s;
}

.palette-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 4px 16px rgba(0,0,0,0.15);
}

.palette-card h3 {
    margin-bottom: 0.5rem;
}

.palette-card h3 a {
    color: #667eea;
    text-decoration: none;
}

.palette-card h3 a:hover {
    text-decoration: underline;
}

.palette-meta {
    color: #6c757d;
    font-size: 0.875rem;
    margin-bottom: 0.5rem;
}

.palette-description {
    color: #495057;
    margin: 0.5rem 0 1rem;
}

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

/* Badges */
.badge {
    display: inline-block;
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
}

.badge-success {
    background-color: #d4edda;
    color: #155724;
}

.badge-secondary {
    background-color: #e2e3e5;
    color: #383d41;
}

/* Auth Forms */
.auth-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 60vh;
}

.auth-card {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 4px 16px rgba(0,0,0,0.1);
    width: 100%;
    max-width: 400px;
}

.auth-card h2 {
    text-align: center;
    color: #667eea;
    margin-bottom: 1.5rem;
}

.auth-footer {
    text-align: center;
    margin-top: 1rem;
    color: #6c757d;
}

.auth-footer a {
    color: #667eea;
    text-decoration: none;
}

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

/* Forms */
.form-container {
    max-width: 600px;
    margin: 0 auto;
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: #333;
}

.form-group input[type="text"],
.form-group input[type="email"],
.form-group input[type="password"],
.form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #e1e8ed;
    border-radius: 6px;
    font-size: 1rem;
    font-family: inherit;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: #667eea;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    cursor: pointer;
}

.form-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

/* Palette View */
.palette-view {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.category-section {
    margin-bottom: 3rem;
}

.category-title {
    color: #667eea;
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid #e1e8ed;
}

.color-count {
    color: #6c757d;
    font-size: 1rem;
    font-weight: normal;
}

.color-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 1rem;
}

.color-item {
    background: #f8f9fa;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
    transition: transform 0.3s;
}

.color-item:hover {
    transform: translateY(-3px);
}

.color-item.editable {
    position: relative;
}

.color-item .btn-icon {
    position: absolute;
    top: 0.25rem;
    right: 0.25rem;
    background: white;
    border-radius: 50%;
    width: 24px;
    height: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    line-height: 1;
    padding: 0;
    opacity: 0;
    transition: opacity 0.3s;
}

.color-item:hover .btn-icon {
    opacity: 1;
}

.color-swatch {
    width: 100%;
    height: 80px;
    border-bottom: 1px solid #e1e8ed;
}

.color-info {
    padding: 0.75rem 0.5rem;
    font-size: 0.75rem;
}

.color-format {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.25rem;
    gap: 0.5rem;
}

.format-label {
    font-weight: 600;
    color: #667eea;
    text-transform: uppercase;
    font-size: 0.65rem;
    min-width: 30px;
}

.format-value {
    font-family: 'Courier New', monospace;
    color: #333;
    font-size: 0.7rem;
    text-align: right;
    flex: 1;
}

.color-name-display {
    margin-top: 0.5rem;
    padding-top: 0.5rem;
    border-top: 1px solid #e1e8ed;
    font-weight: 500;
    color: #495057;
    text-align: center;
}

.color-hex {
    display: block;
    font-weight: 600;
    font-size: 0.875rem;
    color: #333;
}

.color-name {
    display: block;
    font-size: 0.75rem;
    color: #6c757d;
}

/* Edit Palette */
.edit-container {
    display: grid;
    gap: 2rem;
}

.palette-info-section,
.categories-section {
    background: white;
    padding: 2rem;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.palette-info-section h2,
.categories-section h2 {
    color: #667eea;
    margin-bottom: 1.5rem;
}

.add-category-form,
.add-color-form {
    background: #f8f9fa;
    padding: 1rem;
    border-radius: 8px;
    margin-bottom: 1.5rem;
}

.add-category-form h3 {
    font-size: 1rem;
    margin-bottom: 0.75rem;
    color: #495057;
}

.format-help {
    margin-top: 0.5rem;
    margin-bottom: 0;
    font-size: 0.75rem;
    color: #6c757d;
    font-style: italic;
}

.inline-form,
.color-form {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.inline-form input[type="text"],
.color-form input[type="text"] {
    flex: 1;
    min-width: 150px;
    padding: 0.5rem;
    border: 2px solid #e1e8ed;
    border-radius: 6px;
}

.category-edit-section {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: #f8f9fa;
    border-radius: 8px;
}

.category-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.category-header h3 {
    color: #495057;
    font-size: 1.25rem;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 3rem;
    color: #6c757d;
}

.empty-state a {
    color: #667eea;
    text-decoration: none;
}

.empty-state a:hover {
    text-decoration: underline;
}

/* Footer */
.footer {
    background: #2d3748;
    color: white;
    padding: 2rem 0;
    text-align: center;
    margin-top: auto;
}

/* Responsive */
@media (max-width: 768px) {
    .hero h1 {
        font-size: 2rem;
    }

    .hero .subtitle {
        font-size: 1rem;
    }

    .nav-links {
        gap: 1rem;
        font-size: 0.875rem;
    }

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

    .color-grid {
        grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    }

    .page-header {
        flex-direction: column;
        align-items: flex-start;
    }
}