/**
 * DCScan landing header / top-bar / nav / footer — shared across all pages.
 * Source: dcscan-production/index.html (dcscan.io landing).
 */

:root {
    --black: #000000;
    --white: #ffffff;
    --gray-50: #fafafa;
    --gray-100: #f4f4f5;
    --gray-200: #e4e4e7;
    --gray-300: #d4d4d8;
    --gray-400: #a1a1aa;
    --gray-500: #71717a;
    --gray-600: #52525b;
    --gray-700: #3f3f46;
    --gray-800: #27272a;
    --gray-900: #18181b;
    --gray-950: #09090b;
    --success: #22c55e;
    --success-bg: #dcfce7;
    --warning: #f59e0b;
    --warning-bg: #fef3c7;
    --error: #ef4444;
    --error-bg: #fee2e2;
    --info: #3b82f6;
    --info-bg: #dbeafe;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

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

body {
    font-family: var(--font-sans);
    background: var(--gray-50);
    color: var(--gray-900);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
    font-size: 14px;
}

a {
    color: var(--black);
    text-decoration: none;
    transition: color 0.15s;
}

a:hover {
    color: var(--gray-600);
}

/* Top Bar */
.top-bar {
    background: var(--gray-900);
    color: var(--white);
    padding: 0.5rem 0;
    font-size: 12px;
}

.top-bar-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.top-bar-left {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.top-bar-item {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    color: var(--gray-400);
}

.top-bar-item i {
    font-size: 10px;
}

.top-bar-value {
    color: var(--white);
    font-weight: 500;
}

.top-bar-right {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle {
    background: none;
    border: none;
    color: var(--gray-400);
    cursor: pointer;
    padding: 0.25rem;
    font-size: 14px;
}

.theme-toggle:hover {
    color: var(--white);
}

/* Main Header */
header {
    background: var(--white);
    border-bottom: 1px solid var(--gray-200);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 64px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    font-weight: 450;
    font-size: 1rem;
    color: #000000;
    line-height: 1.2;
}

.logo-text {
    display: flex;
    flex-direction: column;
}

.logo-icon {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.logo-icon svg {
    width: 100%;
    height: 100%;
}

.main-nav {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.nav-item {
    position: relative;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    padding: 0.5rem 0.875rem;
    color: var(--gray-600);
    font-weight: 500;
    font-size: 13px;
    border-radius: var(--radius-md);
    transition: all 0.15s;
}

.nav-link:hover {
    color: var(--black);
    background: var(--gray-100);
}

.nav-link.active {
    background: var(--gray-900);
    color: var(--white);
}

.nav-link i {
    font-size: 11px;
}

.nav-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 220px;
    background: var(--white);
    border: 1px solid var(--gray-200);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: 0.5rem;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.2s;
    z-index: 200;
}

.nav-item:hover .nav-dropdown {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.625rem 0.75rem;
    color: var(--gray-700);
    border-radius: var(--radius-sm);
    font-size: 13px;
}

.dropdown-item:hover {
    background: var(--gray-100);
    color: var(--black);
}

.dropdown-item i {
    width: 16px;
    color: var(--gray-500);
}

.dropdown-divider {
    height: 1px;
    background: var(--gray-200);
    margin: 0.5rem 0;
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    padding: 0.5rem 1rem;
    font-size: 13px;
    font-weight: 600;
    border-radius: var(--radius-md);
    border: none;
    cursor: pointer;
    transition: all 0.15s;
    font-family: inherit;
}

.btn-primary {
    background: var(--black);
    color: var(--white);
}

.btn-primary:hover {
    background: var(--gray-800);
}

.btn-secondary {
    background: var(--gray-100);
    color: var(--gray-700);
}

.btn-secondary:hover {
    background: var(--gray-200);
}

/* Footer */
footer {
    background: var(--white);
    border-top: 1px solid var(--gray-200);
    padding: 2rem 0;
    margin-top: 3rem;
}

.footer-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 400;
    font-size: 1rem;
    color: var(--gray-500);
}

.footer-links {
    display: flex;
    gap: 1.5rem;
}

.footer-links a {
    font-size: 12px;
    color: var(--gray-500);
}

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

@media (max-width: 768px) {
    .top-bar-left {
        display: none;
    }

    .main-nav {
        display: none;
    }
}