/* ===================================
   Modern Resume Web UI - Inspired Design
   ===================================== */

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

:root {
    /* Color Palette */
    --primary-blue: #4A90E2;
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --warning-gradient: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
    
    /* Neutral Colors */
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-dark: #1a202c;
    --text-primary: #2d3748;
    --text-secondary: #718096;
    --text-muted: #a0aec0;
    
    /* Glass Effect */
    --glass-bg: rgba(255, 255, 255, 0.25);
    --glass-border: rgba(255, 255, 255, 0.18);
    --glass-shadow: 0 8px 32px 0 rgba(31, 38, 135, 0.37);
    --glass-backdrop: blur(4px);
    
    /* 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;
    
    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07), 0 2px 4px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.15), 0 4px 10px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 40px rgba(0,0,0,0.1);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

.app-container {
    display: flex;
    min-height: 100vh;
    position: relative;
}

/* ===================================
   Sidebar Navigation
   ===================================== */

.sidebar {
    width: 280px;
    background: var(--bg-secondary);
    border-right: 1px solid #e2e8f0;
    display: flex;
    flex-direction: column;
    position: fixed;
    height: 100vh;
    z-index: 100;
    box-shadow: var(--shadow-lg);
}

.sidebar-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid #e2e8f0;
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--primary-blue);
}

.logo i {
    font-size: 1.5rem;
}

.nav-menu {
    flex: 1;
    padding: var(--spacing-md) 0;
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-lg);
    margin: 0 var(--spacing-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--text-secondary);
    font-weight: 500;
}

.nav-item:hover {
    background: rgba(74, 144, 226, 0.1);
    color: var(--primary-blue);
    transform: translateX(4px);
}

.nav-item.active {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-md);
}

.nav-item i {
    width: 20px;
    text-align: center;
}

.sidebar-footer {
    padding: var(--spacing-lg);
    border-top: 1px solid #e2e8f0;
}

.user-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.2rem;
}

.user-details .name {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
}

.user-details .title {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* ===================================
   Main Content Area
   ===================================== */

.main-content {
    flex: 1;
    margin-left: 280px;
    background: var(--bg-primary);
    min-height: 100vh;
    padding: var(--spacing-xl) var(--spacing-lg);
}

.content-section {
    display: none;
    animation: fadeIn 0.5s ease-in-out;
}

.content-section.active {
    display: block;
}

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

.section-header {
    margin-bottom: var(--spacing-xl);
    text-align: center;
}

.section-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: var(--spacing-sm);
}

.section-header h2 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

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

/* ===================================
   Stats Grid (Overview)
   ===================================== */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.stat-card {
    background: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    transition: all var(--transition-normal);
    border: 1px solid transparent;
}

.stat-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-card.primary {
    border-left: 4px solid #4A90E2;
}

.stat-card.success {
    border-left: 4px solid #48bb78;
}

.stat-card.info {
    border-left: 4px solid #38b2ac;
}

.stat-card.warning {
    border-left: 4px solid #ed8936;
}

.stat-icon {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    color: white;
}

.stat-card.primary .stat-icon {
    background: linear-gradient(135deg, #4A90E2, #357abd);
}

.stat-card.success .stat-icon {
    background: linear-gradient(135deg, #48bb78, #38a169);
}

.stat-card.info .stat-icon {
    background: linear-gradient(135deg, #38b2ac, #2c7a7b);
}

.stat-card.warning .stat-icon {
    background: linear-gradient(135deg, #ed8936, #dd6b20);
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: var(--spacing-xs);
}

/* ===================================
   Dashboard Grid
   ===================================== */

.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.card {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
    transition: all var(--transition-normal);
    border: 1px solid rgba(0,0,0,0.05);
}

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

.card-header {
    padding: var(--spacing-lg);
    border-bottom: 1px solid #e2e8f0;
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(74, 144, 226, 0.02);
}

.card-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.card-header i {
    color: var(--primary-blue);
}

.card-content {
    padding: var(--spacing-lg);
}

/* ===================================
   Chat Interface
   ===================================== */

.chat-container {
    max-width: 900px;
    margin: 0 auto;
    display: flex;
    flex-direction: column;
    height: calc(100vh - 4rem);
}

.chat-header {
    text-align: center;
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    flex-shrink: 0;
}

.chat-header h2 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
}

.chat-header i {
    color: var(--primary-blue);
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-md);
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-md);
    scrollbar-width: thin;
    scrollbar-color: var(--primary-blue) transparent;
}

.chat-messages::-webkit-scrollbar {
    width: 6px;
}

.chat-messages::-webkit-scrollbar-track {
    background: transparent;
}

.chat-messages::-webkit-scrollbar-thumb {
    background: var(--primary-blue);
    border-radius: 3px;
}

.message {
    display: flex;
    margin-bottom: var(--spacing-lg);
    animation: slideIn 0.3s ease-out;
}

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

.message.user {
    flex-direction: row-reverse;
}

.message.user .message-content {
    background: var(--primary-gradient);
    color: white;
    margin-left: var(--spacing-md);
    margin-right: 0;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    flex-shrink: 0;
}

.message.user .message-avatar {
    background: var(--text-secondary);
}

.message-content {
    background: #f7fafc;
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    margin-left: var(--spacing-sm);
    max-width: 70%;
    box-shadow: var(--shadow-sm);
}

.message-text {
    line-height: 1.6;
}

.chat-suggestions {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
    justify-content: center;
    flex-shrink: 0;
}

.suggestion-chip {
    background: var(--bg-secondary);
    border: 1px solid #e2e8f0;
    border-radius: var(--radius-xl);
    padding: var(--spacing-sm) var(--spacing-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    box-shadow: var(--shadow-sm);
}

.suggestion-chip:hover {
    background: var(--primary-blue);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.chat-input-container {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-md);
    flex-shrink: 0;
}

.chat-input {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.chat-input input {
    flex: 1;
    padding: var(--spacing-md);
    border: 1px solid #e2e8f0;
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: all var(--transition-fast);
    background: var(--bg-primary);
}

.chat-input input:focus {
    outline: none;
    border-color: var(--primary-blue);
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.1);
}

.chat-input button {
    width: 48px;
    height: 48px;
    border-radius: 50%;
    border: none;
    background: var(--primary-gradient);
    color: white;
    cursor: pointer;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-md);
}

.chat-input button:hover {
    transform: scale(1.05);
    box-shadow: var(--shadow-lg);
}

.chat-input button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

/* ===================================
   Profile Section
   ===================================== */

.profile-container {
    max-width: 1000px;
    margin: 0 auto;
}

.profile-header {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.profile-avatar {
    width: 120px;
    height: 120px;
    border-radius: 50%;
    background: var(--primary-gradient);
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 3rem;
    flex-shrink: 0;
    box-shadow: var(--shadow-lg);
}

.profile-info h1 {
    font-size: 2.5rem;
    margin-bottom: var(--spacing-sm);
    color: var(--text-primary);
}

.profile-title {
    font-size: 1.2rem;
    color: var(--primary-blue);
    margin-bottom: var(--spacing-xs);
    font-weight: 600;
}

.profile-location {
    color: var(--text-secondary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.profile-actions {
    margin-left: auto;
}

.profile-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    overflow: hidden;
}

/* ===================================
   Skills Section
   ===================================== */

.skills-container {
    max-width: 1200px;
    margin: 0 auto;
}

.skills-content {
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    padding: var(--spacing-xl);
}

.skills-category {
    margin-bottom: var(--spacing-xl);
}

.skills-category h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--primary-blue);
    display: inline-block;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: var(--spacing-sm);
}

.skill-tag {
    background: rgba(74, 144, 226, 0.1);
    color: var(--primary-blue);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 500;
    text-align: center;
    transition: all var(--transition-fast);
    border: 1px solid rgba(74, 144, 226, 0.2);
}

.skill-tag:hover {
    background: var(--primary-blue);
    color: white;
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

/* ===================================
   Experience Section  
   ===================================== */

.experience-container {
    max-width: 1000px;
    margin: 0 auto;
}

.experience-timeline {
    position: relative;
    padding-left: 2rem;
}

.experience-timeline::before {
    content: '';
    position: absolute;
    left: 1rem;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--primary-gradient);
}

.experience-item {
    position: relative;
    background: var(--bg-secondary);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
    margin-left: var(--spacing-lg);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.experience-item::before {
    content: '';
    position: absolute;
    left: -1.75rem;
    top: 1.5rem;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--primary-blue);
    border: 3px solid white;
    box-shadow: var(--shadow-sm);
}

.experience-item:hover {
    transform: translateX(8px);
    box-shadow: var(--shadow-lg);
}

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

.experience-title {
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.experience-company {
    color: var(--primary-blue);
    font-weight: 600;
    margin-bottom: var(--spacing-xs);
}

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

.experience-dates {
    background: rgba(74, 144, 226, 0.1);
    color: var(--primary-blue);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.9rem;
    font-weight: 500;
    white-space: nowrap;
}

.experience-description ul {
    list-style: none;
    padding: 0;
}

.experience-description li {
    margin-bottom: var(--spacing-sm);
    padding-left: 1.5rem;
    position: relative;
    line-height: 1.6;
    color: var(--text-secondary);
}

.experience-description li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--primary-blue);
    font-weight: bold;
}

/* ===================================
   Buttons
   ===================================== */

.btn-primary, .btn-secondary {
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    cursor: pointer;
    border: none;
    transition: all var(--transition-fast);
    font-size: 0.95rem;
}

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

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

.btn-secondary {
    background: var(--bg-primary);
    color: var(--text-secondary);
    border: 1px solid #e2e8f0;
}

.btn-secondary:hover {
    background: var(--primary-blue);
    color: white;
    border-color: var(--primary-blue);
}

/* ===================================
   Loading States
   ===================================== */

.loading {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    color: var(--text-secondary);
    padding: var(--spacing-xl);
}

.loader, .loader-large {
    width: 24px;
    height: 24px;
    border: 3px solid #f3f3f3;
    border-top: 3px solid var(--primary-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.loader-large {
    width: 48px;
    height: 48px;
    border-width: 4px;
}

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

.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.loading-overlay.active {
    display: flex;
}

.loading-content {
    background: var(--bg-secondary);
    padding: var(--spacing-xl);
    border-radius: var(--radius-lg);
    text-align: center;
    box-shadow: var(--shadow-xl);
    max-width: 400px;
    margin: var(--spacing-lg);
}

.loading-content h3 {
    margin: var(--spacing-lg) 0 var(--spacing-sm);
    color: var(--text-primary);
}

.loading-content p {
    color: var(--text-secondary);
}

/* ===================================
   Contact Info Styles
   ===================================== */

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: rgba(74, 144, 226, 0.05);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.contact-item:hover {
    background: rgba(74, 144, 226, 0.1);
    transform: translateY(-2px);
}

.contact-item i {
    color: var(--primary-blue);
    width: 20px;
    text-align: center;
}

.contact-item a {
    color: var(--text-primary);
    text-decoration: none;
}

.contact-item a:hover {
    color: var(--primary-blue);
}

/* ===================================
   Responsive Design
   ===================================== */

@media (max-width: 1024px) {
    .sidebar {
        transform: translateX(-100%);
        transition: transform var(--transition-normal);
    }
    
    .sidebar.open {
        transform: translateX(0);
    }
    
    .main-content {
        margin-left: 0;
        padding: var(--spacing-lg);
    }
    
    .dashboard-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    }
}

@media (max-width: 768px) {
    .profile-header {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-md);
    }
    
    .profile-avatar {
        width: 100px;
        height: 100px;
        font-size: 2.5rem;
    }
    
    .profile-info h1 {
        font-size: 2rem;
    }
    
    .section-header h1 {
        font-size: 2rem;
    }
    
    .section-header h2 {
        font-size: 1.75rem;
    }
    
    .chat-container {
        height: calc(100vh - 6rem);
    }
    
    .experience-timeline {
        padding-left: 1rem;
    }
    
    .experience-item {
        margin-left: 0.5rem;
    }
    
    .experience-item::before {
        left: -1.25rem;
    }
}

@media (max-width: 480px) {
    .main-content {
        padding: var(--spacing-md);
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    .stat-card {
        flex-direction: column;
        text-align: center;
        gap: var(--spacing-sm);
    }
    
    .chat-suggestions {
        justify-content: flex-start;
    }
    
    .suggestion-chip {
        font-size: 0.8rem;
        padding: var(--spacing-xs) var(--spacing-sm);
    }
}

/* ===================================
   Accessibility
   ===================================== */

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus styles for keyboard navigation */
*:focus {
    outline: 2px solid var(--primary-blue);
    outline-offset: 2px;
}

button:focus, input:focus {
    outline: none;
    box-shadow: 0 0 0 3px rgba(74, 144, 226, 0.3);
}