/* ========================================
   CSS Variables & Theme System
   ======================================== */

:root {
    /* Typography */
    --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", system-ui, "Helvetica Neue", Arial, sans-serif;
    --font-size-base: 16px;
    --font-size-small: 0.875rem;
    --font-size-large: 1.125rem;
    --font-size-h1: 2.5rem;
    --font-size-h2: 2rem;
    --font-size-h3: 1.5rem;
    --line-height-base: 1.6;
    --line-height-heading: 1.2;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    --spacing-xxl: 4rem;

    /* Border radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    /* Transitions */
    --transition-base: 0.2s ease;
}

/* Dark Theme (Default) */
[data-theme="dark"] {
    --bg-primary: #0a0a0a;
    --bg-secondary: #141414;
    --bg-tertiary: #1a1a1a;
    --bg-card: #1f1f1f;
    --text-primary: #e0e0e0;
    --text-secondary: #b0b0b0;
    --text-muted: #808080;
    --accent-primary: #3b82f6;
    --accent-secondary: #8b5cf6;
    --border-color: #2a2a2a;
    --header-bg: rgba(10, 10, 10, 0.9);
    --header-bg-solid: #0a0a0a;
}

/* Light Theme */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f5f5f5;
    --bg-tertiary: #eeeeee;
    --bg-card: #fafafa;
    --text-primary: #1a1a1a;
    --text-secondary: #4a4a4a;
    --text-muted: #6a6a6a;
    --accent-primary: #2563eb;
    --accent-secondary: #7c3aed;
    --border-color: #e0e0e0;
    --header-bg: rgba(255, 255, 255, 0.9);
    --header-bg-solid: #ffffff;
}

/* ========================================
   Base Styles
   ======================================== */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-base);
    line-height: var(--line-height-base);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    transition: background-color var(--transition-base), color var(--transition-base);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-md);
}

/* ========================================
   Typography
   ======================================== */

h1, h2, h3, h4, h5, h6 {
    line-height: var(--line-height-heading);
    color: var(--text-primary);
    font-weight: 600;
    margin-bottom: var(--spacing-md);
}

h1 {
    font-size: var(--font-size-h1);
}

h2 {
    font-size: var(--font-size-h2);
}

h3 {
    font-size: var(--font-size-h3);
}

p {
    margin-bottom: var(--spacing-sm);
}

a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color var(--transition-base);
}

a:hover {
    color: var(--accent-secondary);
}

a:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

ul {
    list-style-position: inside;
}

/* ========================================
   Header / Navigation
   ======================================== */

.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: var(--header-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition-base);
}

.header.scrolled {
    background-color: var(--header-bg-solid);
}

.header-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
}

.logo a {
    font-size: var(--font-size-large);
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.logo .asn {
    color: var(--accent-primary);
    font-weight: 600;
}

.nav {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.nav-link {
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: color var(--transition-base), background-color var(--transition-base);
}

.nav-link:hover {
    color: var(--text-primary);
    background-color: var(--bg-tertiary);
}

.theme-toggle {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: var(--font-size-large);
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 40px;
    height: 40px;
    transition: background-color var(--transition-base), border-color var(--transition-base);
}

.theme-toggle:hover {
    background-color: var(--bg-tertiary);
    border-color: var(--accent-primary);
}

.theme-toggle:focus {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

/* ========================================
   Network Status Section
   ======================================== */

.network-status {
    padding: var(--spacing-md) var(--spacing-md);
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

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

.status-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

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

.status-indicator {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    flex-shrink: 0;
}

.status-indicator.status-ok {
    background-color: #10b981;
    color: white;
}

.status-indicator.status-warning {
    background-color: #f59e0b;
    color: white;
}

.status-indicator.status-error {
    background-color: #ef4444;
    color: white;
}

.status-icon {
    font-size: 14px;
    font-weight: bold;
    line-height: 1;
}

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

.status-message {
    font-weight: 500;
    color: var(--text-primary);
    font-size: var(--font-size-base);
}

.status-page-link {
    color: var(--accent-primary);
    font-size: var(--font-size-small);
    text-decoration: none;
    transition: color var(--transition-base);
    white-space: nowrap;
}

.status-page-link:hover {
    color: var(--accent-secondary);
    text-decoration: underline;
}

.status-pops {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr;
    gap: var(--spacing-lg);
    align-items: start;
}

.status-region {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.status-region-title {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-xs);
}

.status-pop-list {
    display: grid;
    gap: var(--spacing-xs);
}

.status-region:first-child .status-pop-list {
    grid-template-columns: repeat(3, 1fr);
}

.status-region:nth-child(2) .status-pop-list {
    grid-template-columns: repeat(2, 1fr);
}

.status-region:last-child .status-pop-list {
    grid-template-columns: 1fr;
}

.status-pop-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-small);
}

.status-pop-indicator {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

.status-pop-indicator.status-ok {
    background-color: #10b981;
    box-shadow: 0 0 0 2px rgba(16, 185, 129, 0.2);
}

.status-pop-indicator.status-warning {
    background-color: #f59e0b;
    box-shadow: 0 0 0 2px rgba(245, 158, 11, 0.2);
}

.status-pop-indicator.status-error {
    background-color: #ef4444;
    box-shadow: 0 0 0 2px rgba(239, 68, 68, 0.2);
}

.status-pop-indicator.status-coming-soon {
    background-color: #8b5cf6;
    box-shadow: 0 0 0 2px rgba(139, 92, 246, 0.2);
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

.status-pop-name {
    color: var(--text-secondary);
}

.coming-soon-badge {
    font-size: 0.9em;
    margin-left: 0.3em;
    opacity: 0.8;
    display: inline-block;
    vertical-align: middle;
}

/* ========================================
   Hero Section
   ======================================== */

.hero {
    padding: var(--spacing-xxl) var(--spacing-md);
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    background-image: 
        url("data:image/svg+xml,%3Csvg width='120' height='120' xmlns='http://www.w3.org/2000/svg'%3E%3Cdefs%3E%3Cpattern id='network-pattern' x='0' y='0' width='120' height='120' patternUnits='userSpaceOnUse'%3E%3Ccircle cx='24' cy='24' r='1.5' fill='%233b82f6' opacity='0.15'/%3E%3Ccircle cx='60' cy='36' r='1.5' fill='%233b82f6' opacity='0.15'/%3E%3Ccircle cx='96' cy='24' r='1.5' fill='%233b82f6' opacity='0.15'/%3E%3Ccircle cx='36' cy='72' r='1.5' fill='%233b82f6' opacity='0.15'/%3E%3Ccircle cx='84' cy='84' r='1.5' fill='%233b82f6' opacity='0.15'/%3E%3Ccircle cx='12' cy='60' r='1.5' fill='%233b82f6' opacity='0.15'/%3E%3Ccircle cx='108' cy='60' r='1.5' fill='%233b82f6' opacity='0.15'/%3E%3Cline x1='24' y1='24' x2='60' y2='36' stroke='%233b82f6' stroke-width='0.3' opacity='0.08'/%3E%3Cline x1='60' y1='36' x2='96' y2='24' stroke='%233b82f6' stroke-width='0.3' opacity='0.08'/%3E%3Cline x1='24' y1='24' x2='36' y2='72' stroke='%233b82f6' stroke-width='0.3' opacity='0.08'/%3E%3Cline x1='96' y1='24' x2='84' y2='84' stroke='%233b82f6' stroke-width='0.3' opacity='0.08'/%3E%3Cline x1='36' y1='72' x2='84' y2='84' stroke='%233b82f6' stroke-width='0.3' opacity='0.08'/%3E%3Cline x1='12' y1='60' x2='24' y2='24' stroke='%233b82f6' stroke-width='0.3' opacity='0.08'/%3E%3Cline x1='108' y1='60' x2='96' y2='24' stroke='%233b82f6' stroke-width='0.3' opacity='0.08'/%3E%3C/pattern%3E%3C/defs%3E%3Crect width='120' height='120' fill='url(%23network-pattern)'/%3E%3C/svg%3E"),
        linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-primary) 100%);
    background-size: 240px 240px, 100% 100%;
    background-position: 0 0, center;
    text-align: center;
    min-height: 60vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.08) 0%, transparent 50%);
    pointer-events: none;
}

[data-theme="light"] .hero::before {
    background: radial-gradient(circle at 20% 50%, rgba(59, 130, 246, 0.05) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(139, 92, 246, 0.05) 0%, transparent 50%);
}

.hero .container {
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: clamp(2rem, 5vw, var(--font-size-h1));
    margin-bottom: var(--spacing-md);
}

.asn-highlight {
    color: var(--accent-primary);
    display: block;
    margin-top: var(--spacing-xs);
}

.hero-subtitle {
    font-size: var(--font-size-large);
    color: var(--text-secondary);
    margin-bottom: var(--spacing-xl);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-stats {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
    margin-bottom: var(--spacing-xl);
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.stat-label {
    font-size: var(--font-size-small);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: var(--font-size-base);
    color: var(--text-primary);
    font-weight: 500;
}

.hero-cta {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

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

.btn {
    display: inline-block;
    padding: var(--spacing-sm) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: all var(--transition-base);
    border: none;
    cursor: pointer;
    text-align: center;
}

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

.btn-primary:hover {
    background-color: var(--accent-secondary);
    color: white;
    transform: translateY(-2px);
}

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

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

/* ========================================
   Section Styles
   ======================================== */

section {
    padding: var(--spacing-xxl) var(--spacing-md);
}

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

.section-description {
    text-align: center;
    color: var(--text-secondary);
    max-width: 800px;
    margin: 0 auto var(--spacing-xl);
}

/* ========================================
   Network POPs Section
   ======================================== */

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

.pops-regions {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
    max-width: 1000px;
    margin-left: auto;
    margin-right: auto;
}

.pops-region-group {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.pops-region-title {
    font-size: var(--font-size-h3);
    font-weight: 600;
    color: var(--accent-primary);
    margin-bottom: var(--spacing-md);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: var(--font-size-base);
}

.pops-list {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.pop-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-sm);
    background-color: var(--bg-tertiary);
    border-radius: var(--radius-sm);
    transition: background-color var(--transition-base);
}

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

.pop-item-name {
    font-weight: 500;
    color: var(--text-primary);
    font-size: var(--font-size-base);
}

.pop-item-link {
    color: var(--accent-primary);
    font-size: var(--font-size-small);
    text-decoration: none;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-base);
}

.pop-item-link:hover {
    background-color: var(--accent-primary);
    color: white;
}

/* Legacy support for old pop-card format (if needed elsewhere) */
.pops-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
}

.pop-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    transition: transform var(--transition-base), box-shadow var(--transition-base);
}

.pop-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.3);
}

[data-theme="light"] .pop-card:hover {
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.1);
}

.pop-location {
    font-size: var(--font-size-h3);
    margin-bottom: var(--spacing-xs);
    color: var(--text-primary);
}

.pop-region {
    font-size: var(--font-size-small);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: var(--spacing-md);
}

.pop-capabilities {
    list-style: none;
    margin-bottom: var(--spacing-md);
    padding: 0;
}

.pop-capabilities li {
    padding: var(--spacing-xs) 0;
    color: var(--text-secondary);
    font-size: var(--font-size-small);
    padding-left: var(--spacing-md);
    position: relative;
}

.pop-capabilities li::before {
    content: "▸";
    position: absolute;
    left: 0;
    color: var(--accent-primary);
}

.pop-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.pop-link {
    display: inline-block;
    padding: var(--spacing-xs) var(--spacing-sm);
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border-radius: var(--radius-sm);
    font-size: var(--font-size-small);
    transition: all var(--transition-base);
}

.pop-link:hover {
    background-color: var(--accent-primary);
    color: white;
}

/* ========================================
   About Section
   ======================================== */

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

.about-content {
    max-width: 1000px;
    margin: 0 auto;
}

.about-text p {
    margin-bottom: var(--spacing-md);
    color: var(--text-secondary);
}

.network-highlights h3 {
    margin-bottom: var(--spacing-md);
}

.network-highlights ul {
    list-style: none;
    padding: 0;
}

.network-highlights li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
    color: var(--text-secondary);
}

.network-highlights li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent-primary);
    font-weight: bold;
}

/* ========================================
   Peering Section
   ======================================== */

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

.peering-content {
    max-width: 1000px;
    margin: 0 auto;
}

.peering-section {
    margin-bottom: var(--spacing-xl);
}

.peering-section h3 {
    margin-bottom: var(--spacing-md);
    color: var(--accent-primary);
}

.peering-section p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
}

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

.info-item {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
}

.info-label {
    font-size: var(--font-size-small);
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.info-value {
    font-size: var(--font-size-base);
    color: var(--text-primary);
    font-weight: 500;
}

.info-value a {
    word-break: break-all;
}

/* ========================================
   Contact Section
   ======================================== */

.contact {
    background-color: var(--bg-primary);
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
    max-width: 1000px;
    margin: 0 auto;
}

.contact-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
}

.contact-card h3 {
    margin-bottom: var(--spacing-md);
    color: var(--accent-primary);
}

.contact-card p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.contact-email {
    font-size: var(--font-size-large);
    font-weight: 500;
    margin: var(--spacing-md) 0 !important;
}

.contact-email a {
    color: var(--accent-primary);
    word-break: break-all;
}

.contact-note {
    font-size: var(--font-size-small);
    color: var(--text-muted);
    font-style: italic;
}

.abuse-guidelines {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--border-color);
}

.abuse-guidelines ul {
    list-style: none;
    padding: 0;
    margin-top: var(--spacing-sm);
}

.abuse-guidelines li {
    padding: var(--spacing-xs) 0;
    padding-left: var(--spacing-md);
    position: relative;
    color: var(--text-secondary);
    font-size: var(--font-size-small);
}

.abuse-guidelines li::before {
    content: "•";
    position: absolute;
    left: 0;
    color: var(--accent-primary);
}

/* ========================================
   Footer
   ======================================== */

.footer {
    background-color: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: var(--spacing-lg) var(--spacing-md);
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: center;
    align-items: center;
    text-align: center;
}

.footer-copyright {
    color: var(--text-muted);
    font-size: var(--font-size-small);
    margin: 0;
}

.footer-copyright a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color var(--transition-base);
}

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


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

@media (max-width: 768px) {
    .header-container {
        flex-wrap: wrap;
    }

    .nav {
        order: 3;
        width: 100%;
        justify-content: center;
    }

    .network-status {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    .status-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .status-pops {
        grid-template-columns: 1fr;
    }

    .status-region:first-child .status-pop-list,
    .status-region:nth-child(2) .status-pop-list,
    .status-region:last-child .status-pop-list {
        grid-template-columns: 1fr;
    }

    .hero {
        min-height: auto;
        padding: var(--spacing-xl) var(--spacing-md);
    }

    .hero-stats {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .hero-cta {
        flex-direction: column;
    }

    .hero-cta .btn {
        width: 100%;
        max-width: 300px;
    }

    .pops-regions {
        grid-template-columns: 1fr;
    }

    .pops-grid {
        grid-template-columns: 1fr;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .contact-grid {
        grid-template-columns: 1fr;
    }

    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .info-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 var(--spacing-sm);
    }

    section {
        padding: var(--spacing-xl) var(--spacing-sm);
    }

    .pop-links {
        flex-direction: column;
    }

    .pop-link {
        width: 100%;
        text-align: center;
    }
}