/* ============================================
   Design System & CSS Variables
   ============================================ */
:root {
    /* Colors - Vibrant Dark Theme */
    --color-bg-primary: #0a0e27;
    --color-bg-secondary: #151932;
    --color-bg-tertiary: #1e2442;

    /* Glassmorphism */
    --glass-bg: rgba(30, 36, 66, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
    --glass-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --gradient-accent: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --gradient-success: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);

    /* Text Colors */
    --color-text-primary: #ffffff;
    --color-text-secondary: #a0aec0;
    --color-text-muted: #718096;

    /* Accent Colors */
    --color-accent-purple: #667eea;
    --color-accent-pink: #f093fb;
    --color-accent-blue: #4facfe;

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

    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 2rem;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 350ms ease;
}

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

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

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 20% 50%, rgba(102, 126, 234, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 80%, rgba(240, 147, 251, 0.15) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-lg);
    position: relative;
    z-index: 1;
}

/* ============================================
   Glass Card Effect
   ============================================ */
.glass-card {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-lg);
    box-shadow: var(--glass-shadow);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.glass-card:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 40px 0 rgba(0, 0, 0, 0.5);
}

/* ============================================
   Header
   ============================================ */
.header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    animation: fadeInDown 0.6s ease;
}

.header-content {
    display: inline-block;
}

.title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.title-icon {
    font-size: 2.5rem;
    filter: drop-shadow(0 4px 8px rgba(102, 126, 234, 0.4));
}

.subtitle {
    color: var(--color-text-secondary);
    font-size: var(--font-size-lg);
    font-weight: 300;
    margin-bottom: var(--spacing-md);
}

.credits {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    background: rgba(255, 255, 255, 0.05);
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 50px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    backdrop-filter: blur(5px);
    margin-top: var(--spacing-sm);
    display: inline-flex;
    transition: all var(--transition-base);
}

.credits:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    border-color: var(--color-accent-blue);
}

.credits p {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    margin: 0;
}

.credits strong {
    color: var(--color-accent-blue);
    font-weight: 600;
}

.linkedin-link {
    display: flex;
    align-items: center;
    text-decoration: none;
}

.linkedin-icon {
    width: 24px;
    height: 24px;
    min-width: 24px;
    max-width: 24px;
    object-fit: contain;
    transition: transform var(--transition-fast);
}

.linkedin-link:hover .linkedin-icon {
    transform: scale(1.1);
}

/* ============================================
   Upload Section
   ============================================ */
.upload-section {
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.6s ease 0.1s both;
}

.upload-card {
    padding: var(--spacing-xl);
    text-align: center;
}

.upload-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    animation: float 3s ease-in-out infinite;
}

.upload-card h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-xs);
}

.upload-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
}

.upload-zone {
    border: 2px dashed var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-xl);
    transition: all var(--transition-base);
    cursor: pointer;
}

.upload-zone:hover {
    border-color: var(--color-accent-purple);
    background: rgba(102, 126, 234, 0.05);
}

.upload-zone.drag-over {
    border-color: var(--color-accent-blue);
    background: rgba(79, 172, 254, 0.1);
    transform: scale(1.02);
}

.upload-label {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    cursor: pointer;
}

.upload-text {
    font-size: var(--font-size-lg);
    color: var(--color-text-primary);
    font-weight: 500;
}

.upload-hint {
    font-size: var(--font-size-sm);
    color: var(--color-text-muted);
}

.file-info {
    margin-top: var(--spacing-lg);
    padding: var(--spacing-md);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    animation: slideIn 0.3s ease;
}

.file-name {
    font-weight: 600;
    color: var(--color-accent-blue);
    margin-bottom: var(--spacing-xs);
}

.file-stats {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

/* ============================================
   Search Section
   ============================================ */
.search-section {
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.6s ease 0.2s both;
}

.search-card {
    padding: var(--spacing-xl);
}

.search-card h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-lg);
}

.filter-tabs {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
}

.tab-btn {
    flex: 1;
    min-width: 150px;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--color-text-secondary);
    font-size: var(--font-size-base);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
}

.tab-btn:hover {
    background: var(--color-bg-secondary);
    border-color: var(--color-accent-purple);
    color: var(--color-text-primary);
    transform: translateY(-2px);
}

.tab-btn.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: var(--color-text-primary);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.4);
}

.tab-icon {
    font-size: var(--font-size-lg);
}

.filter-panel {
    display: none;
    animation: fadeIn 0.3s ease;
}

.filter-panel.active {
    display: block;
}

.input-group {
    margin-bottom: var(--spacing-md);
}

.input-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

.search-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--color-bg-tertiary);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-size: var(--font-size-base);
    font-family: var(--font-family);
    transition: all var(--transition-base);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-accent-purple);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.2);
}

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

/* ============================================
   Buttons
   ============================================ */
.btn {
    padding: var(--spacing-sm) var(--spacing-lg);
    border: none;
    border-radius: var(--radius-md);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    font-family: var(--font-family);
}

.btn-primary {
    background: var(--gradient-primary);
    color: var(--color-text-primary);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.5);
}

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

.btn-secondary {
    background: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
    border: 1px solid var(--glass-border);
    margin-top: var(--spacing-md);
}

.btn-secondary:hover {
    background: var(--color-bg-secondary);
    color: var(--color-text-primary);
    border-color: var(--color-accent-purple);
}

.btn-accent {
    background: var(--gradient-accent);
    color: var(--color-text-primary);
    box-shadow: 0 4px 12px rgba(240, 147, 251, 0.3);
}

.btn-accent:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(240, 147, 251, 0.5);
}

.btn-icon {
    font-size: var(--font-size-lg);
}

/* ============================================
   Results Section
   ============================================ */
.results-section {
    animation: fadeInUp 0.6s ease 0.3s both;
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.results-info h2 {
    font-size: var(--font-size-2xl);
    margin-bottom: var(--spacing-xs);
}

.results-count {
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
}

.results-container {
    padding: var(--spacing-lg);
    min-height: 300px;
}

.loading {
    text-align: center;
    padding: var(--spacing-xl);
}

.spinner {
    width: 50px;
    height: 50px;
    margin: 0 auto var(--spacing-md);
    border: 4px solid var(--color-bg-tertiary);
    border-top-color: var(--color-accent-purple);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.results-table-wrapper {
    overflow-x: auto;
}

.results-table {
    width: 100%;
    border-collapse: collapse;
}

.results-table thead {
    background: var(--color-bg-tertiary);
}

.results-table th {
    padding: var(--spacing-sm) var(--spacing-md);
    text-align: left;
    font-weight: 600;
    color: var(--color-text-secondary);
    font-size: var(--font-size-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.results-table tbody tr {
    border-bottom: 1px solid var(--glass-border);
    transition: background var(--transition-fast);
    animation: fadeIn 0.3s ease;
}

.results-table tbody tr:hover {
    background: var(--color-bg-tertiary);
}

.results-table td {
    padding: var(--spacing-md);
    color: var(--color-text-primary);
}

.results-table td:first-child {
    color: var(--color-text-muted);
    font-weight: 600;
}

.results-table td:nth-child(2) {
    font-weight: 500;
    color: var(--color-accent-blue);
}

.no-results {
    text-align: center;
    padding: var(--spacing-xl);
}

.no-results-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-md);
    opacity: 0.5;
}

.no-results h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-xs);
}

.no-results p {
    color: var(--color-text-secondary);
}

/* ============================================
   Toast Notifications
   ============================================ */
.toast-container {
    position: fixed;
    top: var(--spacing-lg);
    right: var(--spacing-lg);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    background: var(--glass-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-lg);
    color: var(--color-text-primary);
    box-shadow: var(--glass-shadow);
    animation: slideInRight 0.3s ease;
    min-width: 300px;
}

.toast.success {
    border-left: 4px solid var(--color-accent-blue);
}

.toast.error {
    border-left: 4px solid #f5576c;
}

/* ============================================
   Animations
   ============================================ */
@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-10px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(100px);
    }

    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

@keyframes float {

    0%,
    100% {
        transform: translateY(0);
    }

    50% {
        transform: translateY(-10px);
    }
}

/* ============================================
   Responsive Design
   ============================================ */
@media (max-width: 768px) {
    .container {
        padding: var(--spacing-sm);
        width: 100%;
        max-width: 100%;
        overflow-x: hidden;
    }

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

    .credits {
        flex-direction: column;
        gap: var(--spacing-xs);
        padding: var(--spacing-sm);
        border-radius: var(--radius-md);
        width: 100%;
    }

    .title {
        font-size: var(--font-size-2xl);
        flex-direction: column;
        text-align: center;
    }

    .subtitle {
        font-size: var(--font-size-base);
    }

    .filter-tabs {
        flex-direction: column;
    }

    .tab-btn {
        width: 100%;
        justify-content: center;
    }

    .results-header {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-sm);
    }

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

    .btn {
        width: 100%;
        justify-content: center;
    }

    .toast-container {
        left: var(--spacing-sm);
        right: var(--spacing-sm);
        bottom: var(--spacing-sm);
        top: auto;
    }

    .toast {
        min-width: auto;
        width: 100%;
    }

    /* Prevent zoom on inputs for iOS */
    input[type='text'],
    input[type='file'] {
        font-size: 16px;
    }

    .upload-text::after {
        content: "(or tap)";
        font-size: var(--font-size-sm);
        display: block;
        opacity: 0.8;
    }
}

@media (max-width: 480px) {

    .upload-card,
    .search-card,
    .results-container {
        padding: var(--spacing-md);
    }

    .title-icon {
        font-size: 2rem;
    }

    .upload-icon {
        font-size: 3rem;
    }

    .results-table th,
    .results-table td {
        padding: var(--spacing-xs) var(--spacing-sm);
        font-size: var(--font-size-sm);
        white-space: nowrap;
    }

    /* Horizontal scroll for table */
    .results-table-wrapper {
        -webkit-overflow-scrolling: touch;
    }
}