/* ============================================
   NEURAL TRANSIT - UI Components
   Reusable components for consistent design
   ============================================ */

/* ============================================
   BUTTONS
   ============================================ */

/* Base Button */
.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-display);
    font-size: var(--text-sm);
    font-weight: 600;
    line-height: 1;
    text-align: center;
    white-space: nowrap;
    border-radius: var(--radius-lg);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--duration-300) var(--ease-out);
    position: relative;
    overflow: hidden;
}

.btn:focus-visible {
    outline: 2px solid var(--accent-cyan-500);
    outline-offset: 2px;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    pointer-events: none;
}

/* Button Sizes */
.btn-xs {
    padding: var(--space-1) var(--space-3);
    font-size: var(--text-xs);
    border-radius: var(--radius-md);
}

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

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

.btn-xl {
    padding: var(--space-5) var(--space-10);
    font-size: var(--text-lg);
    border-radius: var(--radius-xl);
}

/* Primary Button - Gradient */
.btn-primary {
    background: var(--gradient-accent);
    color: var(--primary-900);
    border: none;
    box-shadow: var(--shadow-md), 0 0 20px var(--accent-cyan-glow);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 30px var(--accent-cyan-glow);
}

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

/* Secondary Button - Outline */
.btn-secondary {
    background: transparent;
    color: var(--dark-text-primary);
    border: 1px solid var(--dark-border-hover);
}

body.light-mode .btn-secondary {
    color: var(--light-text-primary);
    border-color: var(--light-border-hover);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent-cyan-500);
    color: var(--accent-cyan-500);
}

body.light-mode .btn-secondary:hover {
    background: rgba(0, 0, 0, 0.03);
}

/* Ghost Button */
.btn-ghost {
    background: transparent;
    color: var(--dark-text-secondary);
    border: none;
}

.btn-ghost:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--dark-text-primary);
}

body.light-mode .btn-ghost {
    color: var(--light-text-secondary);
}

body.light-mode .btn-ghost:hover {
    background: rgba(0, 0, 0, 0.03);
    color: var(--light-text-primary);
}

/* Glass Button */
.btn-glass {
    background: rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    color: var(--dark-text-primary);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.btn-glass:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
}

/* Accent Color Buttons */
.btn-cyan {
    background: var(--accent-cyan-500);
    color: var(--primary-900);
}

.btn-cyan:hover {
    background: var(--accent-cyan-400);
    box-shadow: var(--shadow-glow-cyan);
}

.btn-green {
    background: var(--accent-green-500);
    color: var(--primary-900);
}

.btn-green:hover {
    background: var(--accent-green-400);
    box-shadow: var(--shadow-glow-green);
}

.btn-purple {
    background: var(--accent-purple-500);
    color: white;
}

.btn-purple:hover {
    background: var(--accent-purple-400);
    box-shadow: var(--shadow-glow-purple);
}

/* Icon Button */
.btn-icon {
    padding: var(--space-3);
    border-radius: var(--radius-lg);
}

.btn-icon.btn-sm {
    padding: var(--space-2);
}

.btn-icon.btn-lg {
    padding: var(--space-4);
}

/* Full Width Button */
.btn-full {
    width: 100%;
}

/* Button with Icon */
.btn svg,
.btn i {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.btn-lg svg,
.btn-lg i {
    width: 20px;
    height: 20px;
}

/* ============================================
   CARDS
   ============================================ */

/* Base Card */
.card {
    background: var(--gradient-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-xl);
    padding: var(--space-6);
    transition: all var(--duration-300) var(--ease-out);
    position: relative;
    overflow: hidden;
}

body.light-mode .card {
    background: var(--light-bg-card);
    border-color: var(--light-border);
    box-shadow: var(--shadow-sm);
}

.card:hover {
    transform: translateY(-4px);
    border-color: rgba(0, 212, 255, 0.3);
    box-shadow: var(--shadow-lg), 0 0 30px rgba(0, 212, 255, 0.1);
}

body.light-mode .card:hover {
    box-shadow: var(--shadow-lg);
}

/* Card Sizes */
.card-sm {
    padding: var(--space-4);
    border-radius: var(--radius-lg);
}

.card-lg {
    padding: var(--space-8);
    border-radius: var(--radius-2xl);
}

/* Glass Card */
.card-glass {
    background: rgba(255, 255, 255, 0.03);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(255, 255, 255, 0.08);
}

body.light-mode .card-glass {
    background: rgba(255, 255, 255, 0.7);
    border: 1px solid rgba(0, 0, 0, 0.05);
}

/* Gradient Border Card */
.card-gradient {
    background: var(--dark-bg-secondary);
    border: none;
    position: relative;
}

.card-gradient::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: var(--radius-xl);
    padding: 1px;
    background: var(--gradient-accent);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
    pointer-events: none;
}

/* Card Header */
.card-header {
    margin-bottom: var(--space-4);
}

/* Card Icon */
.card-icon {
    width: 56px;
    height: 56px;
    background: rgba(0, 212, 255, 0.1);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    margin-bottom: var(--space-4);
    transition: all var(--duration-300) var(--ease-out);
}

.card:hover .card-icon {
    background: rgba(0, 212, 255, 0.2);
    transform: scale(1.05);
}

.card-icon-sm {
    width: 44px;
    height: 44px;
    font-size: 1.25rem;
}

.card-icon-lg {
    width: 72px;
    height: 72px;
    font-size: 2rem;
}

/* Card Icon Colors */
.card-icon-cyan { background: rgba(0, 212, 255, 0.1); }
.card-icon-green { background: rgba(16, 185, 129, 0.1); }
.card-icon-purple { background: rgba(139, 92, 246, 0.1); }
.card-icon-amber { background: rgba(245, 158, 11, 0.1); }

/* Card Title */
.card-title {
    font-size: var(--text-xl);
    font-weight: 600;
    margin-bottom: var(--space-2);
    color: var(--dark-text-primary);
}

body.light-mode .card-title {
    color: var(--light-text-primary);
}

/* Card Description */
.card-description {
    font-size: var(--text-sm);
    color: var(--dark-text-secondary);
    line-height: var(--leading-relaxed);
}

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

/* Card Footer */
.card-footer {
    margin-top: var(--space-4);
    padding-top: var(--space-4);
    border-top: 1px solid var(--dark-border);
}

body.light-mode .card-footer {
    border-color: var(--light-border);
}

/* Card Link - Makes entire card clickable */
.card-link {
    position: absolute;
    inset: 0;
    z-index: 1;
}

/* ============================================
   NAVIGATION
   ============================================ */

/* Navbar */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: var(--z-sticky);
    height: var(--navbar-height);
    display: flex;
    align-items: center;
    background: rgba(10, 15, 28, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--dark-border);
    transition: all var(--duration-300) var(--ease-out);
}

body.light-mode .navbar {
    background: rgba(255, 255, 255, 0.8);
    border-color: var(--light-border);
}

.navbar.scrolled {
    height: var(--navbar-height-scrolled);
    background: rgba(10, 15, 28, 0.95);
    box-shadow: var(--shadow-lg);
}

body.light-mode .navbar.scrolled {
    background: rgba(255, 255, 255, 0.95);
}

/* Nav Container */
.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
    max-width: var(--container-xl);
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Logo */
.nav-logo {
    display: flex;
    align-items: center;
    gap: var(--space-3);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: var(--text-xl);
    color: var(--dark-text-primary);
    text-decoration: none;
    transition: opacity var(--duration-200);
}

body.light-mode .nav-logo {
    color: var(--light-text-primary);
}

.nav-logo:hover {
    opacity: 0.8;
    color: var(--dark-text-primary);
}

body.light-mode .nav-logo:hover {
    color: var(--light-text-primary);
}

.nav-logo-icon {
    width: 44px;
    height: 44px;
    background: var(--gradient-accent);
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    box-shadow: var(--shadow-md);
}

/* Nav Menu */
.nav-menu {
    display: flex;
    align-items: center;
    gap: var(--space-1);
}

/* Nav Link */
.nav-link {
    position: relative;
    padding: var(--space-2) var(--space-4);
    font-size: var(--text-sm);
    font-weight: 500;
    color: var(--dark-text-secondary);
    border-radius: var(--radius-md);
    transition: all var(--duration-200) var(--ease-out);
}

body.light-mode .nav-link {
    color: var(--light-text-secondary);
}

.nav-link:hover {
    color: var(--dark-text-primary);
    background: rgba(255, 255, 255, 0.05);
}

body.light-mode .nav-link:hover {
    color: var(--light-text-primary);
    background: rgba(0, 0, 0, 0.03);
}

.nav-link.active {
    color: var(--accent-cyan-500);
}

/* Nav Link Underline Effect */
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-accent);
    border-radius: var(--radius-full);
    transition: width var(--duration-300) var(--ease-out);
}

.nav-link:hover::after,
.nav-link.active::after {
    width: calc(100% - var(--space-8));
}

/* Nav Actions */
.nav-actions {
    display: flex;
    align-items: center;
    gap: var(--space-3);
}

/* Theme Toggle */
.theme-toggle {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-full);
    background: var(--dark-bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--dark-text-primary);
    border: 1px solid var(--dark-border);
    transition: all var(--duration-300) var(--ease-out);
}

body.light-mode .theme-toggle {
    background: var(--light-bg-tertiary);
    color: var(--light-text-primary);
    border-color: var(--light-border);
}

.theme-toggle:hover {
    background: var(--primary-600);
    border-color: var(--primary-500);
    transform: rotate(180deg);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

/* Mobile Nav Toggle */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: var(--space-2);
    cursor: pointer;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--dark-text-primary);
    border-radius: var(--radius-full);
    transition: all var(--duration-300) var(--ease-out);
}

body.light-mode .nav-toggle span {
    background: var(--light-text-primary);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Menu */
@media (max-width: 1024px) {
    .nav-menu {
        position: fixed;
        top: var(--navbar-height);
        left: 0;
        right: 0;
        bottom: 0;
        flex-direction: column;
        align-items: stretch;
        gap: var(--space-2);
        padding: var(--space-6);
        background: rgba(10, 15, 28, 0.98);
        backdrop-filter: blur(20px);
        transform: translateX(100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--duration-300) var(--ease-out);
    }
    
    body.light-mode .nav-menu {
        background: rgba(255, 255, 255, 0.98);
    }
    
    .nav-menu.active {
        transform: translateX(0);
        opacity: 1;
        visibility: visible;
    }
    
    .nav-link {
        padding: var(--space-4);
        font-size: var(--text-lg);
        border-radius: var(--radius-lg);
    }
    
    .nav-toggle {
        display: flex;
    }
}

/* ============================================
   BADGES & TAGS
   ============================================ */

/* Base Badge */
.badge {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-3);
    font-family: var(--font-display);
    font-size: var(--text-xs);
    font-weight: 600;
    line-height: 1;
    border-radius: var(--radius-full);
    text-transform: uppercase;
    letter-spacing: var(--tracking-wide);
}

/* Badge Colors */
.badge-cyan {
    background: rgba(0, 212, 255, 0.15);
    color: var(--accent-cyan-400);
    border: 1px solid rgba(0, 212, 255, 0.3);
}

.badge-green {
    background: rgba(16, 185, 129, 0.15);
    color: var(--accent-green-400);
    border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-purple {
    background: rgba(139, 92, 246, 0.15);
    color: var(--accent-purple-400);
    border: 1px solid rgba(139, 92, 246, 0.3);
}

.badge-amber {
    background: rgba(245, 158, 11, 0.15);
    color: var(--accent-amber-400);
    border: 1px solid rgba(245, 158, 11, 0.3);
}

/* Status Badge with Dot */
.badge-status {
    display: inline-flex;
    align-items: center;
    gap: var(--space-2);
}

.badge-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    animation: pulse-dot 2s ease-in-out infinite;
}

.badge-dot-green {
    background: var(--accent-green-500);
    box-shadow: 0 0 10px var(--accent-green-glow);
}

.badge-dot-cyan {
    background: var(--accent-cyan-500);
    box-shadow: 0 0 10px var(--accent-cyan-glow);
}

@keyframes pulse-dot {
    0%, 100% { transform: scale(1); opacity: 1; }
    50% { transform: scale(1.3); opacity: 0.7; }
}

/* Tag */
.tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-1);
    padding: var(--space-1) var(--space-2);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--dark-text-secondary);
    background: var(--dark-bg-tertiary);
    border-radius: var(--radius-md);
    transition: all var(--duration-200);
}

body.light-mode .tag {
    color: var(--light-text-secondary);
    background: var(--light-bg-tertiary);
}

.tag:hover {
    background: var(--primary-600);
    color: var(--dark-text-primary);
}

/* ============================================
   AVATARS
   ============================================ */

.avatar {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-full);
    overflow: hidden;
    border: 2px solid var(--dark-border);
    flex-shrink: 0;
}

.avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.avatar-sm { width: 32px; height: 32px; }
.avatar-md { width: 48px; height: 48px; }
.avatar-lg { width: 64px; height: 64px; }
.avatar-xl { width: 96px; height: 96px; }
.avatar-2xl { width: 128px; height: 128px; }

/* Avatar with gradient border */
.avatar-gradient {
    padding: 3px;
    background: var(--gradient-accent);
    border: none;
}

.avatar-gradient img {
    border-radius: var(--radius-full);
}

/* Avatar Group */
.avatar-group {
    display: flex;
}

.avatar-group .avatar {
    margin-left: -12px;
    border: 3px solid var(--dark-bg-primary);
}

.avatar-group .avatar:first-child {
    margin-left: 0;
}

body.light-mode .avatar-group .avatar {
    border-color: var(--light-bg-primary);
}

/* ============================================
   TOOLTIPS
   ============================================ */

[data-tooltip] {
    position: relative;
}

[data-tooltip]::before {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    padding: var(--space-2) var(--space-3);
    font-size: var(--text-xs);
    font-weight: 500;
    color: var(--dark-text-primary);
    background: var(--dark-bg-tertiary);
    border-radius: var(--radius-md);
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: all var(--duration-200) var(--ease-out);
    z-index: var(--z-tooltip);
    box-shadow: var(--shadow-lg);
}

[data-tooltip]:hover::before {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-4px);
}

/* ============================================
   DIVIDERS
   ============================================ */

.divider {
    width: 100%;
    height: 1px;
    background: var(--dark-border);
    margin: var(--space-8) 0;
}

body.light-mode .divider {
    background: var(--light-border);
}

.divider-vertical {
    width: 1px;
    height: 24px;
    background: var(--dark-border);
    margin: 0 var(--space-4);
}

/* Gradient Divider */
.divider-gradient {
    height: 2px;
    background: var(--gradient-accent);
    border: none;
}

/* ============================================
   LOADING STATES
   ============================================ */

/* Spinner */
.spinner {
    width: 24px;
    height: 24px;
    border: 2px solid var(--dark-border);
    border-top-color: var(--accent-cyan-500);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.spinner-sm { width: 16px; height: 16px; }
.spinner-lg { width: 32px; height: 32px; }

/* Skeleton Loading */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--dark-bg-tertiary) 0%,
        var(--dark-bg-secondary) 50%,
        var(--dark-bg-tertiary) 100%
    );
    background-size: 200% 100%;
    animation: skeleton-loading 1.5s ease-in-out infinite;
    border-radius: var(--radius-md);
}

@keyframes skeleton-loading {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.skeleton-text {
    height: 1em;
    margin-bottom: var(--space-2);
}

.skeleton-title {
    height: 1.5em;
    width: 60%;
}

.skeleton-avatar {
    width: 48px;
    height: 48px;
    border-radius: 50%;
}

/* ============================================
   SCROLL TO TOP BUTTON
   ============================================ */

.scroll-top {
    position: fixed;
    bottom: var(--space-8);
    right: var(--space-8);
    width: 48px;
    height: 48px;
    background: var(--gradient-accent);
    color: var(--primary-900);
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg), var(--shadow-glow-cyan);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
    transition: all var(--duration-300) var(--ease-out);
    z-index: var(--z-sticky);
    cursor: pointer;
}

.scroll-top.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.scroll-top:hover {
    transform: translateY(-4px);
}

.scroll-top svg {
    width: 20px;
    height: 20px;
}