/* Variables */
:root {
    --color-primary: #2563eb;
    --color-primary-dark: #1d4ed8;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-danger: #ef4444;
    --color-gray-50: #f9fafb;
    --color-gray-100: #f3f4f6;
    --color-gray-200: #e5e7eb;
    --color-gray-300: #d1d5db;
    --color-gray-500: #6b7280;
    --color-gray-700: #374151;
    --color-gray-900: #111827;
    --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius: 8px;
}

/* Reset */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

body {
    font-family: var(--font-family);
    background: var(--color-gray-50);
    color: var(--color-gray-900);
    line-height: 1.6;
    min-height: 100vh;
}

/* Typography */
h1 { font-size: 1.875rem; font-weight: 700; }
h2 { font-size: 1.5rem; font-weight: 600; }
h3 { font-size: 1.25rem; font-weight: 600; }

/* Utilities */
.hidden { display: none !important; }
.container { max-width: 1200px; margin: 0 auto; padding: 2rem; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
}

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

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

.btn-primary:disabled {
    background: var(--color-gray-300);
    cursor: not-allowed;
}

.btn-small {
    padding: 0.5rem 1rem;
    font-size: 0.875rem;
    background: transparent;
    border: 1px solid var(--color-gray-300);
    color: var(--color-gray-700);
}

.btn-small:hover {
    background: var(--color-gray-100);
}

/* Login Page */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 2rem;
}

.login-box {
    background: white;
    padding: 3rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.login-box h1 {
    margin-bottom: 0.5rem;
}

.login-box .subtitle {
    color: var(--color-gray-500);
    margin-bottom: 2rem;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--color-gray-700);
}

.form-group input {
    width: 100%;
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius);
}

.form-group input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.login-box .btn {
    width: 100%;
}

.error {
    color: var(--color-danger);
    font-size: 0.875rem;
    margin-top: 1rem;
}

/* Navigation */
.navbar {
    background: white;
    box-shadow: var(--shadow-sm);
    padding: 1rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-brand a {
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--color-gray-900);
    text-decoration: none;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-links a {
    color: var(--color-gray-500);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-primary);
}

/* Page Header */
.page-header {
    margin-bottom: 2rem;
}

.page-header p {
    color: var(--color-gray-500);
    margin-top: 0.5rem;
}

/* Filters */
.filters {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.search-input,
.filter-select {
    padding: 0.75rem 1rem;
    font-size: 1rem;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius);
    background: white;
}

.search-input {
    flex: 1;
    min-width: 200px;
}

.search-input:focus,
.filter-select:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* Competitors Grid */
.competitors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}

/* Competitor Card */
.competitor-card {
    background: white;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    padding: 1.5rem;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

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

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

.card-header h3 {
    color: var(--color-gray-900);
}

.card-header a {
    color: var(--color-primary);
    font-size: 0.875rem;
    text-decoration: none;
}

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

.card-tagline {
    color: var(--color-gray-600);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    font-style: italic;
}

.card-features {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.feature-tag {
    background: var(--color-gray-100);
    color: var(--color-gray-700);
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-size: 0.75rem;
}

.card-reviews {
    display: flex;
    gap: 1rem;
    font-size: 0.875rem;
    color: var(--color-gray-500);
}

.review-badge {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.review-badge .star {
    color: var(--color-warning);
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    z-index: 1000;
}

.modal-content {
    background: white;
    border-radius: var(--radius);
    max-width: 800px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    padding: 2rem;
    position: relative;
}

.modal-close {
    position: absolute;
    top: 1rem;
    right: 1rem;
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-gray-500);
}

.modal-close:hover {
    color: var(--color-gray-900);
}

/* Competitor Selector */
.selector-section {
    margin-bottom: 2rem;
}

.competitor-chips {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

.chip {
    padding: 0.5rem 1rem;
    border: 2px solid var(--color-gray-300);
    border-radius: 9999px;
    background: white;
    cursor: pointer;
    font-weight: 500;
    transition: all 0.2s;
}

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

.chip.selected {
    background: var(--color-primary);
    border-color: var(--color-primary);
    color: white;
}

/* Comparison Table */
.comparison-container {
    overflow-x: auto;
}

.comparison-table {
    width: 100%;
    border-collapse: collapse;
    background: white;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.comparison-table th,
.comparison-table td {
    padding: 1rem;
    text-align: left;
    border-bottom: 1px solid var(--color-gray-200);
}

.comparison-table th {
    background: var(--color-gray-100);
    font-weight: 600;
}

.comparison-table th:first-child {
    width: 150px;
    background: var(--color-gray-200);
}

.comparison-table tr:last-child td {
    border-bottom: none;
}

.category-row {
    background: var(--color-primary) !important;
    color: white !important;
}

.category-row td {
    font-weight: 600;
}

/* Similarity Tool */
.similarity-input {
    background: white;
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
    margin-bottom: 2rem;
}

.similarity-input textarea {
    width: 100%;
    padding: 1rem;
    font-size: 1rem;
    border: 1px solid var(--color-gray-300);
    border-radius: var(--radius);
    resize: vertical;
    margin-bottom: 1rem;
    font-family: var(--font-family);
}

.similarity-input textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

.similarity-results {
    background: white;
    padding: 1.5rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow-md);
}

.results-summary {
    color: var(--color-gray-500);
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--color-gray-200);
}

.results-list {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.result-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1rem;
    border: 1px solid var(--color-gray-200);
    border-radius: var(--radius);
}

.result-score {
    flex-shrink: 0;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    font-weight: 700;
    font-size: 1rem;
}

.score-high {
    background: #dcfce7;
    color: #166534;
}

.score-medium {
    background: #fef9c3;
    color: #854d0e;
}

.score-low {
    background: var(--color-gray-100);
    color: var(--color-gray-500);
}

.result-content {
    flex: 1;
}

.result-content h4 {
    margin-bottom: 0.25rem;
}

.result-content .competitor-name {
    color: var(--color-gray-500);
    font-size: 0.875rem;
}

.result-content .matched-text {
    color: var(--color-gray-700);
    margin-top: 0.5rem;
    font-style: italic;
}

/* Detail View */
.detail-section {
    margin-bottom: 2rem;
}

.detail-section h3 {
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--color-primary);
}

.detail-list {
    list-style: none;
}

.detail-list li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.detail-list li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--color-primary);
}

.pricing-badge {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: var(--color-gray-100);
    border-radius: var(--radius);
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

/* Responsive */
@media (max-width: 768px) {
    .navbar {
        flex-direction: column;
        gap: 1rem;
    }

    .nav-links {
        flex-wrap: wrap;
        justify-content: center;
    }

    .container {
        padding: 1rem;
    }

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

    .comparison-table {
        font-size: 0.875rem;
    }

    .comparison-table th,
    .comparison-table td {
        padding: 0.75rem 0.5rem;
    }
}