:root {
    /* Color Palette */
    --bg-main: #0f172a;
    --bg-surface: #1e293b;
    --bg-surface-hover: #334155;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --primary-glow: rgba(59, 130, 246, 0.5);
    --secondary: #475569;
    --secondary-hover: #64748b;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border: #334155;
    
    /* Gradients */
    --gradient-brand: linear-gradient(135deg, #3b82f6 0%, #8b5cf6 100%);
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.2), 0 4px 6px -2px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px var(--primary-glow);
    
    /* Typography */
    --font-sans: 'Inter', system-ui, -apple-system, sans-serif;
    --font-display: 'Outfit', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    
    /* Radii */
    --radius-sm: 6px;
    --radius-md: 12px;
    --radius-lg: 20px;
    
    /* Transitions */
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-main);
    color: var(--text-main);
    line-height: 1.5;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: transparent;
}
::-webkit-scrollbar-thumb {
    background: var(--bg-surface-hover);
    border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--border);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-display);
    font-weight: 700;
}

.app-container {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* Top Navigation */
.top-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 50;
}

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

.logo {
    width: 40px;
    height: 40px;
    border-radius: var(--radius-sm);
    box-shadow: var(--shadow-glow);
}

.brand h1 {
    font-size: 1.25rem;
    letter-spacing: -0.025em;
    line-height: 1.2;
}

.subtitle {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.nav-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

.btn-icon {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid transparent;
}
.btn-icon:hover {
    color: var(--text-main);
    background: rgba(255,255,255,0.05);
}

/* Main Content Styles */
.content {
    flex: 1;
    display: flex;
    justify-content: center;
    padding: 2rem;
    position: relative;
}

.content::before {
    content: '';
    position: absolute;
    top: -10%;
    right: -10%;
    width: 600px;
    height: 600px;
    background: radial-gradient(circle, rgba(59, 130, 246, 0.15) 0%, rgba(15, 23, 42, 0) 70%);
    border-radius: 50%;
    pointer-events: none;
    z-index: 0;
}

.workspace {
    display: flex;
    gap: 2rem;
    width: 100%;
    max-width: 1200px;
    z-index: 1;
    align-items: flex-start;
}

/* Editor Section */
.editor-section {
    flex: 1;
    display: flex;
    flex-direction: column;
    background: rgba(30, 41, 59, 0.5);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.editor-header {
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border);
}

.editor-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.editor-hint {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.actions {
    display: flex;
    gap: 1rem;
}

.btn {
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-weight: 600;
    font-size: 0.95rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--gradient-brand);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:not(:disabled):hover {
    box-shadow: var(--shadow-glow);
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background: var(--bg-surface-hover);
}

.btn-large {
    padding: 1rem 2rem;
    font-size: 1.1rem;
    width: 100%;
}

.editor-container {
    flex: 1;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    min-height: 400px;
}

textarea {
    flex: 1;
    background: var(--bg-main);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1.5rem;
    color: var(--text-main);
    font-family: var(--font-mono);
    font-size: 0.95rem;
    line-height: 1.6;
    resize: vertical;
    min-height: 300px;
    outline: none;
    transition: var(--transition);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.2);
}

textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2), inset 0 2px 4px rgba(0,0,0,0.2);
}

textarea::placeholder {
    color: var(--text-muted);
    opacity: 0.5;
}

.editor-actions {
    padding: 1.5rem;
    background: rgba(0,0,0,0.2);
    border-top: 1px solid var(--border);
}

/* Spinner */
.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s linear infinite;
    display: none;
}

.btn:disabled .spinner {
    display: block;
}

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

/* Loader Overlay */
.loader-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(15, 23, 42, 0.85);
    backdrop-filter: blur(8px);
    z-index: 1000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 1;
    transition: opacity 0.3s ease;
}

.loader-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.loader-content {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
}

.pulse-ring {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: var(--gradient-brand);
    position: relative;
    animation: pulse 2s infinite;
}

.pulse-ring::before {
    content: '';
    position: absolute;
    inset: 4px;
    background: var(--bg-main);
    border-radius: 50%;
}

.pulse-ring::after {
    content: '⚡';
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
}

@keyframes pulse {
    0% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0.7); }
    70% { box-shadow: 0 0 0 20px rgba(59, 130, 246, 0); }
    100% { box-shadow: 0 0 0 0 rgba(59, 130, 246, 0); }
}

/* Modal */
.modal {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0,0,0,0.6);
    backdrop-filter: blur(4px);
    z-index: 2000;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 1;
    transition: opacity 0.2s;
}

.modal.hidden {
    opacity: 0;
    pointer-events: none;
}

.modal-content {
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 2rem;
    width: 90%;
    max-width: 500px;
    box-shadow: var(--shadow-lg);
    max-height: 90vh;
    overflow-y: auto;
}

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

.modal-content p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.input-group label {
    font-size: 0.9rem;
    font-weight: 500;
}

.input-group input {
    background: rgba(0,0,0,0.2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.75rem;
    color: white;
    font-family: monospace;
}

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

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

/* Responsive */
@media (max-width: 900px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        height: auto;
        border-right: none;
        border-bottom: 1px solid var(--border);
        padding: 1.5rem;
    }
    
    .header {
        padding: 1.5rem;
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    
    .actions {
        width: 100%;
    }
    
    .btn {
        flex: 1;
    }
    
    .editor-container {
        padding: 1.5rem;
    }
}

/* PDF Helper Styling */
.pdf-helper {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 30px;
}

.pdf-helper h3 {
    margin: 0 0 10px 0;
    font-size: 1.1rem;
    color: var(--text-color);
    display: flex;
    align-items: center;
    gap: 8px;
}

.pdf-helper p {
    font-size: 0.9rem;
    color: var(--text-muted);
    margin: 0 0 8px 0;
    line-height: 1.5;
}

.pdf-helper p:last-child {
    margin-bottom: 0;
}

/* ATS Results Container */
.ats-container {
    flex: 0 0 350px;
    background: rgba(30, 41, 59, 0.8);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-md);
    padding: 24px;
    box-shadow: var(--shadow-lg);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    animation: slideInRight 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

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

.ats-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.ats-header h3 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-color);
}

.ats-score {
    font-size: 1.5rem;
    font-weight: 700;
    padding: 6px 16px;
    border-radius: 20px;
    background: rgba(255, 255, 255, 0.1);
}

.ats-score.high {
    color: #4ade80;
    background: rgba(74, 222, 128, 0.15);
}

.ats-score.medium {
    color: #facc15;
    background: rgba(250, 204, 21, 0.15);
}

.ats-score.low {
    color: #f87171;
    background: rgba(248, 113, 113, 0.15);
}

.ats-body h4 {
    margin: 0 0 12px 0;
    font-size: 1.05rem;
    color: var(--text-muted);
}

.ats-body ul {
    margin: 0;
    padding-left: 20px;
    color: var(--text-color);
}

.ats-body li {
    margin-bottom: 8px;
    line-height: 1.6;
    position: relative;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive Design */
@media (max-width: 900px) {
    .workspace {
        flex-direction: column;
    }
    
    .ats-container {
        flex: 1;
        width: 100%;
        animation: slideInUp 0.4s ease-out;
    }
    
    .top-nav {
        flex-direction: column;
        gap: 1rem;
        padding: 1rem;
    }
    
    .content {
        padding: 1rem;
    }
}
@keyframes slideInUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}