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

:root {
    /* Color Palette - Premium Dark Theme */
    --bg-primary: #0a0e27;
    --bg-secondary: #141829;
    --bg-card: rgba(30, 35, 60, 0.6);
    --bg-glass: rgba(255, 255, 255, 0.05);

    /* Vibrant Accents */
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #8b5cf6 100%);

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

    /* Status Colors */
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.2);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 30px rgba(99, 102, 241, 0.3);

    /* 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;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background:
        radial-gradient(circle at 20% 30%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(139, 92, 246, 0.1) 0%, transparent 50%);
    animation: backgroundShift 20s ease infinite;
    z-index: -1;
}

@keyframes backgroundShift {

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

    50% {
        transform: translate(-10%, -10%);
    }
}

/* Container */
.container {
    max-width: 1000px;
    margin: 0 auto;
    padding: var(--spacing-lg);
}

/* Header */
.header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
    animation: fadeInDown 0.8s ease;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
}

.logo-icon {
    font-size: 3rem;
    animation: bounceIn 1s ease;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.tagline {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-top: var(--spacing-xs);
}

/* Sections */
.section {
    display: none;
    animation: fadeIn 0.5s ease;
}

.section.active {
    display: block;
}

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

.section-header h2 {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

.section-header p {
    color: var(--text-secondary);
}

/* Form Styles */
.profile-form {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-md);
}

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

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--text-primary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    transition: all var(--transition-normal);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

.form-group textarea {
    min-height: 100px;
    resize: vertical;
}

.helper-text-inline {
    font-size: 0.875rem;
    color: var(--text-secondary);
    font-weight: 400;
}

/* Checkbox Grid */
.checkbox-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-sm);
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border-radius: var(--radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    user-select: none;
}

.checkbox-item:hover {
    background: rgba(99, 102, 241, 0.1);
}

.checkbox-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
    accent-color: var(--accent-primary);
}

.checkbox-item span {
    color: var(--text-primary);
    font-size: 0.9rem;
}

.checkbox-item input[type="checkbox"]:checked+span {
    color: var(--accent-primary);
    font-weight: 500;
}

.other-input {
    width: 100%;
    padding: var(--spacing-sm);
    background: var(--bg-secondary);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    margin-top: var(--spacing-xs);
    transition: all var(--transition-normal);
}

.other-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.1);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-lg);
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
    overflow: hidden;
}

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

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 40px rgba(99, 102, 241, 0.5);
}

.btn-secondary {
    background: var(--bg-card);
    color: var(--text-primary);
    border: 2px solid rgba(255, 255, 255, 0.1);
}

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

.form-actions {
    margin-top: var(--spacing-lg);
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
}

/* Auth Cards */
.auth-card {
    background: var(--bg-card);
    backdrop-filter: blur(15px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    max-width: 450px;
    margin: 0 auto;
    animation: fadeIn 0.8s ease;
}

.user-badge {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: rgba(99, 102, 241, 0.1);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-lg);
}

.btn-full {
    width: 100%;
    margin-bottom: var(--spacing-sm);
}

.btn-link {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.9rem;
    text-decoration: underline;
}

.auth-footer {
    text-align: center;
    margin-top: var(--spacing-md);
    font-size: 0.875rem;
    color: var(--text-muted);
}

.auth-footer a {
    color: var(--accent-primary);
    text-decoration: none;
    font-weight: 600;
}

/* Tabs Navigation */
.tabs-nav {
    display: flex;
    gap: var(--spacing-sm);
    background: var(--bg-secondary);
    padding: var(--spacing-xs);
    border-radius: var(--radius-md);
    margin-bottom: var(--spacing-xl);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.tab-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm);
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    border-radius: var(--radius-sm);
    transition: all var(--transition-normal);
    font-weight: 600;
}

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

.logout-btn {
    flex: 0;
    min-width: 100px;
    text-decoration: none;
    color: var(--error) !important;
}

/* Tab Content */
.tab-pane {
    display: none;
    animation: fadeIn 0.4s ease;
}

.tab-pane.active {
    display: block;
}

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

.content-header h3 {
    font-size: 1.5rem;
}

/* Matches */
.matches-container {
    display: grid;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.match-card {
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: all var(--transition-normal);
    animation: slideInUp 0.5s ease;
}

.match-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(99, 102, 241, 0.3);
}

.match-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
}

.score-container {
    display: flex;
    gap: var(--spacing-md);
    text-align: right;
}

.score-item {
    display: flex;
    flex-direction: column;
}

.score-value {
    font-size: 1.5rem;
    font-weight: 700;
    line-height: 1;
}

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

.score-value.graph {
    color: var(--success);
}

.score-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 4px;
}

.match-details {
    display: grid;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-md);
}

.detail-item {
    background: var(--bg-secondary);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
}

.detail-label {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* Projects Hub */
.projects-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.project-card {
    background: var(--bg-card);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
    transition: var(--transition-normal);
}

.project-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-primary);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: var(--spacing-sm);
}

.relevance-badge {
    padding: 0.2rem 0.6rem;
    border-radius: 8px;
    font-size: 0.7rem;
    font-weight: 700;
    display: inline-flex;
    flex-direction: row;
    align-items: center;
    gap: 4px;
    line-height: 1;
    white-space: nowrap;
    border: 1px solid currentColor;
}

.relevance-badge.nlp {
    background: rgba(99, 102, 241, 0.15);
    color: #818cf8;
}

.relevance-badge.graph {
    background: rgba(16, 185, 129, 0.15);
    color: #10b981;
}

.project-creator {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.project-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.tag {
    padding: 2px 8px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: 4px;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.project-footer {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-top: auto;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.footer-left {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-scores {
    display: flex;
    gap: 8px;
}

.vote-btn {
    background: none;
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
    padding: 4px 12px;
    border-radius: 6px;
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: 5px;
}

.vote-btn.active {
    background: var(--accent-gradient);
    border: none;
}

/* Team Grid */
.team-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(5px);
    z-index: 2000;
    align-items: center;
    justify-content: center;
}

.modal.active {
    display: flex;
}

.modal-content {
    width: 90%;
    max-width: 600px;
}

.modal-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-lg);
}

/* Loading & Utils */
.loading-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(10, 14, 39, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    align-items: center;
    justify-content: center;
    flex-direction: column;
}

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

.loader {
    width: 50px;
    height: 50px;
    border: 3px solid rgba(99, 102, 241, 0.2);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.footer {
    text-align: center;
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    color: var(--text-muted);
    font-size: 0.875rem;
}

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

    to {
        opacity: 1;
    }
}

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

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

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

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

@keyframes bounceIn {
    0% {
        transform: scale(0);
    }

    50% {
        transform: scale(1.1);
    }

    100% {
        transform: scale(1);
    }
}

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

/* Shared Errors */
.error-message {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: var(--error);
    padding: var(--spacing-sm);
    border-radius: var(--radius-sm);
    margin-bottom: var(--spacing-md);
    animation: shake 0.5s ease;
}

@keyframes shake {

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

    25% {
        transform: translateX(-5px);
    }

    75% {
        transform: translateX(5px);
    }
}

@media (max-width: 768px) {
    .container {
        padding: var(--spacing-sm);
    }

    .header h1 {
        font-size: 2rem;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .projects-container {
        grid-template-columns: 1fr;
    }
}

/* Backend Status Indicator */
.status-indicator {
    position: fixed;
    top: 20px;
    right: 20px;
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 16px;
    background: var(--bg-card);
    backdrop-filter: blur(10px);
    border: 1px solid var(--bg-glass);
    border-radius: var(--radius-xl);
    font-size: 0.85rem;
    font-weight: 500;
    z-index: 2000;
    box-shadow: var(--shadow-md);
    transition: var(--transition-normal);
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    transition: var(--transition-normal);
}

.status-indicator.online .status-dot {
    background: var(--success);
    box-shadow: 0 0 10px var(--success);
}

.status-indicator.offline .status-dot {
    background: var(--error);
    box-shadow: 0 0 10px var(--error);
}

.status-indicator.checking .status-dot {
    background: var(--warning);
    box-shadow: 0 0 10px var(--warning);
    animation: pulse 1.5s infinite;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 1;
    }

    50% {
        transform: scale(1.2);
        opacity: 0.5;
    }

    100% {
        transform: scale(1);
        opacity: 1;
    }
}

@media (max-width: 600px) {
    .status-indicator {
        top: 10px;
        right: 10px;
        padding: 5px 10px;
        font-size: 0.75rem;
    }
}

/* Settings Tab Layout Improvement */
#settings-tab.active {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

#settings-tab .settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
    align-items: start;
}

#settings-tab .auth-card {
    margin-top: 0 !important;
    height: 100%;
}

@media (max-width: 850px) {
    #settings-tab .settings-grid {
        grid-template-columns: 1fr;
    }
}

/* Project Hub Enhancements */
.hub-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
}

#project-filter {
    min-width: 250px;
    transition: all 0.3s ease;
}

#project-filter:focus {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 2px rgba(99, 102, 241, 0.2);
    outline: none;
}

.delete-project-btn {
    transition: transform 0.2s ease, opacity 0.2s ease;
    opacity: 0.7;
}

.delete-project-btn:hover {
    transform: scale(1.2);
    opacity: 1;
}

.tag {
    transition: filter 0.2s ease;
}

.tag:hover {
    filter: brightness(1.2);
}

/* Relevance styles are now handled in the main section above */

.relevance-high {
    background: rgba(16, 185, 129, 0.2);
    /* Green */
    border: 1px solid rgba(16, 185, 129, 0.4);
    color: #34d399;
}

.relevance-med {
    background: rgba(245, 158, 11, 0.2);
    /* Amber */
    border: 1px solid rgba(245, 158, 11, 0.4);
    color: #fbbf24;
}

.relevance-low {
    background: rgba(99, 102, 241, 0.2);
    /* Indigo (Default) */
    border: 1px solid rgba(99, 102, 241, 0.4);
    color: #818cf8;
}

.project-card {
    position: relative;
    /* Ensure badge positioning works */
}

/* Streamlit-style Chip Selection */
.chip-container {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.5rem;
}

.chip {
    padding: 0.5rem 1rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
    user-select: none;
}

.chip:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

.chip.selected {
    background: var(--accent-gradient);
    color: white;
    border-color: transparent;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
}