/* ============================================
   Battery Data Commons — Components
   ============================================ */

/* Navigation */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--nav-height);
    background: var(--color-bg-primary);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    backdrop-filter: blur(10px);
    background-color: rgba(255, 255, 255, 0.9);
    transition: background-color var(--transition-base);
}

[data-theme="dark"] .nav {
    background-color: rgba(15, 23, 42, 0.9);
}

.nav-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-6);
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-weight: var(--font-bold);
    font-size: var(--text-lg);
    color: var(--color-text-primary);
}

.nav-logo-icon {
    width: 32px;
    height: 32px;
    background: var(--color-accent-gradient);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-8);
    list-style: none;
    padding: 0;
    margin: 0;
}

.nav-links a {
    color: var(--color-text-secondary);
    font-weight: var(--font-medium);
    font-size: var(--text-sm);
    padding: var(--space-2) 0;
    position: relative;
    transition: color var(--transition-fast);
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent-gradient);
    transition: width var(--transition-base);
}

.nav-links a:hover,
.nav-links a.active {
    color: var(--color-text-primary);
}

.nav-links a:hover::after,
.nav-links a.active::after {
    width: 100%;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-4);
}

/* Theme Toggle */
/* Theme Toggle & Icon Links */
.theme-toggle,
.icon-link {
    background: var(--color-bg-tertiary);
    border: none;
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background-color var(--transition-fast);
}

.theme-toggle:hover,
.icon-link:hover {
    background: var(--color-bg-hover);
}

.theme-toggle svg,
.icon-link svg {
    width: 20px;
    height: 20px;
    color: var(--color-text-secondary);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-2);
    padding: var(--space-3) var(--space-6);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
    border-radius: var(--radius-lg);
    border: none;
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

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

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

/* Animated gradient button for hero CTA */
.btn-primary-animated {
    background: linear-gradient(45deg, #1e40af 0%, #f59e0b 25%, #ea580c 50%, #f59e0b 75%, #1e40af 100%);
    background-size: 200% 200%;
    animation: diagonalFlow 3s ease infinite;
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary-animated:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 20px rgba(245, 158, 11, 0.4);
    color: white;
}

@keyframes diagonalFlow {
    0% {
        background-position: 0% 0%;
    }

    50% {
        background-position: 100% 100%;
    }

    100% {
        background-position: 0% 0%;
    }
}

.btn-secondary {
    background: var(--color-bg-tertiary);
    color: var(--color-text-primary);
}

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

.btn-outline {
    background: transparent;
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
}

.btn-outline:hover {
    border-color: var(--color-accent-primary);
    color: var(--color-accent-primary);
}

/* Gradient outline button for action links */
.btn-outline-gradient {
    background: transparent;
    border: 2px solid transparent;
    background-image: linear-gradient(var(--color-bg-card), var(--color-bg-card)), var(--color-accent-gradient);
    background-origin: border-box;
    background-clip: padding-box, border-box;
    color: var(--color-accent-primary);
    font-weight: var(--font-semibold);
}

.btn-outline-gradient:hover {
    background-image: var(--color-accent-gradient);
    background-clip: padding-box;
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-lg {
    padding: var(--space-4) var(--space-8);
    font-size: var(--text-base);
}

.btn-sm {
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-xs);
}

/* Cards */
.card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    transition: all var(--transition-base);
}

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

.card-header {
    margin-bottom: var(--space-4);
}

.card-title {
    font-size: var(--text-lg);
    font-weight: var(--font-semibold);
    margin-bottom: var(--space-2);
}

.card-subtitle {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
}

.card-body {
    color: var(--color-text-secondary);
}

.card-footer {
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--color-border);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    border-radius: var(--radius-full);
    background: var(--color-bg-tertiary);
    color: var(--color-text-secondary);
}

.badge-performance {
    background: rgba(59, 130, 246, 0.15);
    color: var(--color-cat-performance);
}

.badge-durability {
    background: rgba(245, 158, 11, 0.15);
    color: var(--color-cat-durability);
}

.badge-field {
    background: rgba(16, 185, 129, 0.15);
    color: var(--color-cat-field);
}

.badge-modelling {
    background: rgba(139, 92, 246, 0.15);
    color: var(--color-cat-modelling);
}

.badge-safety {
    background: rgba(239, 68, 68, 0.15);
    color: var(--color-cat-safety);
}

.badge-diagnostics {
    background: rgba(236, 72, 153, 0.15);
    color: var(--color-cat-diagnostics);
}

/* Stats Card */
.stat-card {
    text-align: center;
    padding: var(--space-8);
}

.stat-value {
    font-size: var(--text-4xl);
    font-weight: var(--font-bold);
    background: var(--color-accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
    margin-top: var(--space-2);
}

/* Dataset Card */
.dataset-card {
    display: flex;
    flex-direction: column;
}

.dataset-card .card-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-4);
}

.dataset-meta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-top: var(--space-3);
}

.dataset-doi {
    font-family: var(--font-mono);
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
    margin-top: var(--space-2);
}

/* Input */
.input {
    width: 100%;
    padding: var(--space-3) var(--space-4);
    font-family: var(--font-sans);
    font-size: var(--text-sm);
    color: var(--color-text-primary);
    background: var(--color-bg-secondary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: all var(--transition-fast);
}

.input:focus {
    outline: none;
    border-color: var(--color-accent-primary);
    box-shadow: 0 0 0 3px rgba(14, 165, 233, 0.1);
}

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

body.modal-open {
    overflow: hidden;
}

.correction-callout {
    padding: var(--space-5) var(--space-6);
    transition: none;
}

.correction-callout:hover {
    border-color: var(--color-border);
    box-shadow: none;
    transform: none;
}

.correction-callout h2 {
    margin-bottom: var(--space-2);
    font-size: var(--text-lg);
}

.correction-callout-inner {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-4);
}

.correction-callout-inner p {
    margin: 0;
    max-width: 62ch;
    color: var(--color-text-secondary);
    font-size: var(--text-sm);
    line-height: 1.5;
}

.correction-modal {
    position: fixed;
    inset: 0;
    z-index: 1200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
    background: rgba(15, 23, 42, 0.65);
    backdrop-filter: blur(6px);
}

.correction-modal[hidden] {
    display: none;
}

.correction-dialog {
    width: min(100%, 680px);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-lg);
    padding: var(--space-6);
}

.correction-dialog-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--space-4);
    margin-bottom: var(--space-4);
}

.correction-dialog-header h3 {
    margin-bottom: var(--space-2);
}

.correction-summary {
    margin: 0;
    color: var(--color-text-tertiary);
}

.correction-close {
    width: 40px;
    height: 40px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-full);
    background: transparent;
    color: var(--color-text-secondary);
    cursor: pointer;
    font-size: var(--text-lg);
    line-height: 1;
    transition: all var(--transition-base);
}

.correction-close:hover {
    border-color: var(--color-accent-primary);
    color: var(--color-accent-primary);
}

.correction-form {
    display: flex;
    flex-direction: column;
    gap: var(--space-4);
}

.correction-field {
    display: flex;
    flex-direction: column;
    gap: var(--space-2);
}

.correction-label {
    font-size: var(--text-sm);
    font-weight: var(--font-medium);
}

.correction-textarea {
    min-height: 140px;
    resize: vertical;
    font-family: inherit;
}

.correction-note {
    margin: 0;
    color: var(--color-text-tertiary);
    font-size: var(--text-sm);
}

.correction-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-3);
    flex-wrap: wrap;
}

/* Search Box */
.search-box {
    position: relative;
}

.search-box .search-icon {
    position: absolute;
    left: var(--space-4);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-text-tertiary);
    width: 20px;
    height: 20px;
}

.search-box .input {
    padding-left: var(--space-12);
}

/* Checkbox & Filter */
.filter-group {
    margin-bottom: var(--space-6);
}

.filter-title {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-3);
}

.filter-option {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    padding: var(--space-2) 0;
    cursor: pointer;
}

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

.filter-option label {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
    cursor: pointer;
    flex: 1;
}

.filter-option .count {
    font-size: var(--text-xs);
    color: var(--color-text-tertiary);
}

/* Footer */
.footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: var(--space-12) 0 var(--space-8);
    margin-top: var(--space-16);
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: var(--space-8);
}

@media (max-width: 768px) {
    .footer-grid {
        grid-template-columns: 1fr;
        gap: var(--space-6);
    }
}

.footer-brand {
    max-width: 300px;
}

.footer-brand p {
    font-size: var(--text-sm);
    margin-top: var(--space-4);
}

.footer-title {
    font-size: var(--text-sm);
    font-weight: var(--font-semibold);
    color: var(--color-text-primary);
    margin-bottom: var(--space-4);
}

.footer-links {
    list-style: none;
    padding: 0;
    margin: 0;
}

.footer-links li {
    margin-bottom: var(--space-2);
}

.footer-links a {
    font-size: var(--text-sm);
    color: var(--color-text-secondary);
}

.footer-links a:hover {
    color: var(--color-accent-primary);
}

.footer-bottom {
    margin-top: var(--space-8);
    padding-top: var(--space-6);
    border-top: 1px solid var(--color-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: var(--text-sm);
    color: var(--color-text-tertiary);
}

@media (max-width: 640px) {
    .footer-bottom {
        flex-direction: column;
        gap: var(--space-4);
        text-align: center;
    }
}

/* Version Badge */
.version-badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-1) var(--space-3);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    font-size: var(--text-xs);
    font-weight: var(--font-medium);
    color: var(--color-text-secondary);
}

.version-badge::before {
    content: '';
    width: 6px;
    height: 6px;
    background: var(--color-success);
    border-radius: 50%;
}

/* Mobile Nav */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    padding: var(--space-2);
    cursor: pointer;
}

@media (max-width: 768px) {
    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        background: var(--color-bg-primary);
        border-bottom: 1px solid var(--color-border);
        flex-direction: column;
        padding: var(--space-6);
        gap: var(--space-4);
        transform: translateY(-100%);
        opacity: 0;
        transition: all var(--transition-base);
    }

    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
    }
}

@media (max-width: 640px) {
    .correction-callout-inner,
    .correction-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .correction-dialog {
        padding: var(--space-5);
    }
}