/* ========================================
   CSS Variables & Reset
======================================== */
:root {
    /* Colors */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: rgba(20, 20, 30, 0.8);
    --bg-glass: rgba(255, 255, 255, 0.05);
    
    --text-primary: #ffffff;
    --text-secondary: #a0a0b0;
    --text-muted: #6b6b7b;
    
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-tertiary: #a855f7;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
    
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    
    --border-color: rgba(255, 255, 255, 0.1);
    --shadow-color: rgba(0, 0, 0, 0.5);
    
    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;
    
    /* Border Radius */
    --radius-sm: 0.5rem;
    --radius-md: 0.75rem;
    --radius-lg: 1rem;
    --radius-xl: 1.5rem;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 400ms ease;
    
    /* Font */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
}

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

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ========================================
   App Layout
======================================== */
.app {
    position: relative;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.bg-gradient {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 20%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(168, 85, 247, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(236, 72, 153, 0.1) 0%, transparent 70%);
    pointer-events: none;
    z-index: 0;
}

.bg-particles {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
}

.particle {
    position: absolute;
    width: 4px;
    height: 4px;
    background: var(--accent-primary);
    border-radius: 50%;
    opacity: 0.3;
    animation: float 15s infinite ease-in-out;
}

@keyframes float {
    0%, 100% { transform: translateY(0) translateX(0); }
    25% { transform: translateY(-20px) translateX(10px); }
    50% { transform: translateY(-10px) translateX(-10px); }
    75% { transform: translateY(-30px) translateX(5px); }
}

/* ========================================
   Header
======================================== */
.header {
    position: relative;
    z-index: 10;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg) var(--space-xl);
    backdrop-filter: blur(10px);
    background: rgba(10, 10, 15, 0.8);
    border-bottom: 1px solid var(--border-color);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.5rem;
    font-weight: 700;
}

.logo-icon {
    font-size: 1.75rem;
}

.logo-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-status {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-glass);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--success);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ========================================
   Main Content
======================================== */
.main {
    position: relative;
    z-index: 5;
    flex: 1;
    padding: var(--space-xl);
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

/* Hero Section */
.hero {
    text-align: center;
    padding: var(--space-3xl) 0 var(--space-2xl);
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--space-md);
}

.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    max-width: 500px;
    margin: 0 auto;
}

/* ========================================
   Search Form
======================================== */
.search-section {
    margin-bottom: var(--space-3xl);
}

.search-form {
    background: var(--bg-card);
    backdrop-filter: blur(20px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: 0 25px 50px -12px var(--shadow-color);
}

.input-group {
    display: flex;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.input-wrapper {
    flex: 1;
    min-width: 200px;
    position: relative;
}

.input-icon {
    position: absolute;
    left: var(--space-md);
    top: 50%;
    transform: translateY(-50%);
    font-size: 1.25rem;
    pointer-events: none;
}

.input {
    width: 100%;
    padding: var(--space-md) var(--space-md) var(--space-md) 3rem;
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    color: var(--text-primary);
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition-base);
}

.input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

.input::placeholder {
    color: var(--text-muted);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-size: 1rem;
    font-weight: 600;
    font-family: inherit;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-base);
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent-gradient);
    color: white;
    min-width: 150px;
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 30px -10px rgba(99, 102, 241, 0.5);
}

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

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--accent-primary);
}

.btn-loader {
    width: 20px;
    height: 20px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.filters {
    display: flex;
    align-items: center;
    gap: var(--space-xl);
    margin-top: var(--space-lg);
    padding-top: var(--space-lg);
    border-top: 1px solid var(--border-color);
}

.filter-checkbox {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.filter-checkbox input {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.filter-checkbox input:checked + .checkmark {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
}

.filter-checkbox input:checked + .checkmark::after {
    content: '✓';
    color: white;
    font-size: 0.75rem;
}

.filter-select {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.select {
    padding: var(--space-sm) var(--space-md);
    background: var(--bg-glass);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    cursor: pointer;
}

.select:focus {
    outline: none;
    border-color: var(--accent-primary);
}

/* ========================================
   Results Section
======================================== */
.results-section {
    display: none;
}

.results-section.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.results-header {
    margin-bottom: var(--space-xl);
}

.results-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
}

.results-title span {
    color: var(--accent-primary);
}

.results-query {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.jobs-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--space-lg);
}

/* ========================================
   Job Card
======================================== */
.job-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--space-lg);
    transition: var(--transition-base);
    display: flex;
    flex-direction: column;
}

.job-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-primary);
    box-shadow: 0 20px 40px -15px var(--shadow-color);
}

.job-header {
    display: flex;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.job-logo {
    width: 50px;
    height: 50px;
    border-radius: var(--radius-md);
    background: var(--bg-glass);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
    overflow: hidden;
}

.job-logo img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

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

.job-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: var(--space-xs);
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.job-company {
    color: var(--accent-secondary);
    font-weight: 500;
    font-size: 0.9rem;
}

.job-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.job-tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    background: var(--bg-glass);
    border-radius: var(--radius-full);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.job-tag.remote {
    background: rgba(16, 185, 129, 0.2);
    color: var(--success);
}

.job-tag.salary {
    background: rgba(245, 158, 11, 0.2);
    color: var(--warning);
}

.job-description {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    display: -webkit-box;
    -webkit-line-clamp: 3;
    -webkit-box-orient: vertical;
    overflow: hidden;
    margin-bottom: var(--space-md);
    flex: 1;
}

.job-actions {
    display: flex;
    gap: var(--space-sm);
    margin-top: auto;
}

.job-actions .btn {
    flex: 1;
    padding: var(--space-sm) var(--space-md);
    font-size: 0.875rem;
}

.btn-ai {
    background: linear-gradient(135deg, #8b5cf6 0%, #ec4899 100%);
    color: white;
    border: none;
}

.btn-ai:hover {
    opacity: 0.9;
}

/* ========================================
   Loading Overlay
======================================== */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: var(--space-lg);
    z-index: 100;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--border-color);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loading-spinner.small {
    width: 30px;
    height: 30px;
    border-width: 2px;
}

.loading-text {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* ========================================
   Error Toast
======================================== */
.error-toast {
    position: fixed;
    bottom: var(--space-xl);
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--error);
    border-radius: var(--radius-md);
    color: white;
    z-index: 200;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from { transform: translateX(-50%) translateY(100%); opacity: 0; }
    to { transform: translateX(-50%) translateY(0); opacity: 1; }
}

.error-close {
    background: none;
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
}

/* ========================================
   Modal
======================================== */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 10, 15, 0.9);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 150;
    padding: var(--space-xl);
}

.modal {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-xl);
    width: 100%;
    max-width: 600px;
    max-height: 80vh;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    animation: modalIn 0.3s ease;
}

@keyframes modalIn {
    from { transform: scale(0.95); opacity: 0; }
    to { transform: scale(1); opacity: 1; }
}

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

.modal-title {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 1.25rem;
    font-weight: 600;
}

.ai-badge {
    padding: var(--space-xs) var(--space-sm);
    background: var(--accent-gradient);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 600;
}

.modal-close {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.75rem;
    cursor: pointer;
    padding: 0;
    line-height: 1;
    transition: var(--transition-fast);
}

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

.modal-body {
    padding: var(--space-lg);
    overflow-y: auto;
}

.summary-loading {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-2xl);
    color: var(--text-secondary);
}

.summary-section {
    margin-bottom: var(--space-lg);
}

.summary-section:last-child {
    margin-bottom: 0;
}

.summary-section h4 {
    font-size: 0.9rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: var(--space-sm);
}

.summary-section p {
    color: var(--text-primary);
    line-height: 1.7;
}

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

.summary-list li {
    position: relative;
    padding-left: var(--space-lg);
    margin-bottom: var(--space-sm);
    color: var(--text-secondary);
}

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

/* ========================================
   Footer
======================================== */
.footer {
    position: relative;
    z-index: 5;
    text-align: center;
    padding: var(--space-lg);
    color: var(--text-muted);
    font-size: 0.875rem;
    border-top: 1px solid var(--border-color);
}

.footer strong {
    color: var(--accent-primary);
}

/* ========================================
   Utilities
======================================== */
.hidden {
    display: none !important;
}

/* ========================================
   Responsive
======================================== */
@media (max-width: 768px) {
    .header {
        padding: var(--space-md);
    }
    
    .main {
        padding: var(--space-md);
    }
    
    .hero {
        padding: var(--space-xl) 0;
    }
    
    .search-form {
        padding: var(--space-md);
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .btn-primary {
        width: 100%;
    }
    
    .filters {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--space-md);
    }
    
    .jobs-grid {
        grid-template-columns: 1fr;
    }
    
    .job-actions {
        flex-direction: column;
    }
}