/* ============================================================================
   VPN Sentinel — shared design system
   Single source of truth for tokens, layout primitives and components. Linked
   before each page's inline <style> so page-specific rules still win.
   ========================================================================== */

/* ---------- Design tokens ---------- */
:root {
    /* Surfaces — a deliberate 4-step elevation ramp rather than one flat grey */
    --bg-color: #08090c;
    --bg-subtle: #0b0d11;
    --panel-bg: #12141a;
    --panel-bg-soft: #0e1015;
    --bg-elevated: #171a21;

    --border-color: rgba(255, 255, 255, 0.07);
    --border-strong: rgba(255, 255, 255, 0.14);
    --border-accent: rgba(79, 124, 255, 0.35);

    --accent-primary: #5b84ff;
    --accent-primary-hover: #7396ff;
    --accent-primary-soft: rgba(91, 132, 255, 0.13);
    --accent-vpn: #f4566a;
    --accent-vpn-soft: rgba(244, 86, 106, 0.13);
    --accent-safe: #2ed3a7;
    --accent-safe-soft: rgba(46, 211, 167, 0.13);
    --accent-warn: #f2ac45;
    --accent-warn-soft: rgba(242, 172, 69, 0.13);

    --text-main: #edeff3;
    --text-secondary: #a8adb9;
    --text-muted: #7c818d;

    /* Spacing scale — 4px base, used everywhere instead of ad-hoc values */
    --sp-1: 4px;  --sp-2: 8px;  --sp-3: 12px; --sp-4: 16px;
    --sp-5: 20px; --sp-6: 24px; --sp-8: 32px; --sp-10: 40px; --sp-12: 48px;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-pill: 999px;

    /* Layered shadows read as real depth; a single hard shadow looks cheap */
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 2px 4px rgba(0, 0, 0, 0.25), 0 6px 16px -4px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 4px 8px rgba(0, 0, 0, 0.25), 0 16px 40px -8px rgba(0, 0, 0, 0.55);
    --shadow-glow: 0 0 0 1px var(--border-accent), 0 8px 32px -8px rgba(91, 132, 255, 0.35);

    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', Menlo, monospace;

    --nav-height: 60px;
    --content-max: 1440px;

    --safe-l: env(safe-area-inset-left, 0px);
    --safe-r: env(safe-area-inset-right, 0px);
    --safe-b: env(safe-area-inset-bottom, 0px);

    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
    --transition: 0.16s var(--ease-out);
}

/* ---------- Reset ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    -webkit-text-size-adjust: 100%;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.14) transparent;
}

body {
    background: var(--bg-color);
    color: var(--text-main);
    font-family: var(--font-sans);
    font-size: 15px;
    line-height: 1.55;
    letter-spacing: -0.005em;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    padding-bottom: var(--safe-b);
    /* Very low-contrast ambient wash so large dark areas aren't dead flat */
    background-image:
        radial-gradient(900px 500px at 12% -8%, rgba(91, 132, 255, 0.055), transparent 70%),
        radial-gradient(800px 480px at 100% 0%, rgba(46, 211, 167, 0.032), transparent 70%);
    background-attachment: fixed;
}

a { color: inherit; text-decoration: none; }
button { font-family: inherit; }
img, svg, canvas { max-width: 100%; }

/* Webkit scrollbars — the default light scrollbar on a dark UI is jarring */
::-webkit-scrollbar { width: 10px; height: 10px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.12);
    border-radius: var(--radius-pill);
    border: 2px solid transparent;
    background-clip: content-box;
}
::-webkit-scrollbar-thumb:hover { background: rgba(255, 255, 255, 0.2); background-clip: content-box; }

/* ---------- Typography ---------- */
h1, h2, h3, h4 { letter-spacing: -0.022em; line-height: 1.2; font-weight: 700; }
h1 { font-size: clamp(1.65rem, 1.2rem + 1.8vw, 2.25rem); }
h2 { font-size: clamp(1.15rem, 1rem + 0.6vw, 1.4rem); }
h3 { font-size: 1.02rem; }

/* Tabular figures stop live-updating numbers from jittering as digits change */
.num, .stat-value, .stat-val { font-variant-numeric: tabular-nums; }

/* ---------- Accessibility ---------- */
:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
    border-radius: 4px;
}
:focus:not(:focus-visible) { outline: none; }

.sr-only {
    position: absolute; width: 1px; height: 1px;
    padding: 0; margin: -1px; overflow: hidden;
    clip: rect(0, 0, 0, 0); white-space: nowrap; border: 0;
}

.skip-link {
    position: absolute; left: 12px; top: -60px; z-index: 400;
    background: var(--accent-primary); color: #fff;
    padding: 10px 16px; border-radius: var(--radius-sm);
    font-size: 0.86rem; font-weight: 600;
    transition: top var(--transition);
}
.skip-link:focus { top: 12px; }

/* Honour the OS reduce-motion setting — this UI has pulsing dots, a radar
   sweep, sliding toasts and entrance animations. */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
    .rise { opacity: 1 !important; transform: none !important; }
}

/* ---------- Entrance animation ----------
   Content fades up on load. Stagger via .rise-1 … .rise-6 */
@keyframes rise-in {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: none; }
}
.rise { animation: rise-in 0.5s var(--ease-out) both; }
.rise-1 { animation-delay: 0.04s; }
.rise-2 { animation-delay: 0.08s; }
.rise-3 { animation-delay: 0.12s; }
.rise-4 { animation-delay: 0.16s; }
.rise-5 { animation-delay: 0.20s; }
.rise-6 { animation-delay: 0.24s; }

/* ---------- Top navigation ---------- */
.topnav {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-4);
    height: var(--nav-height);
    padding: 0 max(var(--sp-6), var(--safe-r)) 0 max(var(--sp-6), var(--safe-l));
    background: rgba(8, 9, 12, 0.72);
    backdrop-filter: blur(16px) saturate(160%);
    -webkit-backdrop-filter: blur(16px) saturate(160%);
    position: sticky;
    top: 0;
    z-index: 200;
    /* Gradient hairline reads softer than a flat 1px border */
    border-bottom: 1px solid transparent;
    background-clip: padding-box;
    box-shadow: inset 0 -1px 0 var(--border-color);
}

.brand { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }

.brand-mark {
    width: 27px; height: 27px;
    border-radius: 8px;
    background: linear-gradient(145deg, var(--accent-primary), #3d63d8);
    display: flex; align-items: center; justify-content: center;
    font-weight: 800; font-size: 0.7rem; color: #fff;
    letter-spacing: -0.02em; flex-shrink: 0;
    box-shadow: 0 2px 8px -2px rgba(91, 132, 255, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.22);
}

.brand-name {
    font-size: 0.92rem; font-weight: 700;
    letter-spacing: -0.015em; white-space: nowrap;
}
.brand-name .sub { color: var(--text-muted); font-weight: 500; }

.nav-links { display: flex; align-items: center; gap: 2px; }

.nav-links a {
    display: flex; align-items: center; gap: 7px;
    padding: 7px 12px;
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 0.855rem; font-weight: 500;
    white-space: nowrap;
    position: relative;
    transition: background var(--transition), color var(--transition);
}
.nav-links a svg { width: 15px; height: 15px; flex-shrink: 0; opacity: 0.85; }
.nav-links a:hover { color: var(--text-main); background: rgba(255, 255, 255, 0.045); }
.nav-links a.active {
    color: var(--text-main);
    background: var(--accent-primary-soft);
}
.nav-links a.active svg { opacity: 1; color: var(--accent-primary); }

.nav-toggle {
    display: none;
    width: 40px; height: 40px;
    align-items: center; justify-content: center;
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    cursor: pointer;
    transition: background var(--transition), border-color var(--transition);
}
.nav-toggle:hover { background: var(--bg-elevated); border-color: var(--border-strong); }

@media (max-width: 900px) {
    .topnav { padding: 0 max(var(--sp-4), var(--safe-r)) 0 max(var(--sp-4), var(--safe-l)); }
    .nav-toggle { display: flex; }
    .nav-links {
        display: none;
        position: absolute;
        top: calc(var(--nav-height) + 6px);
        left: var(--sp-3); right: var(--sp-3);
        flex-direction: column; align-items: stretch; gap: 2px;
        background: var(--bg-elevated);
        border: 1px solid var(--border-strong);
        border-radius: var(--radius-md);
        padding: var(--sp-2);
        box-shadow: var(--shadow-lg);
        animation: rise-in 0.2s var(--ease-out) both;
    }
    .nav-links.open { display: flex; }
    /* 44px minimum touch target */
    .nav-links a { padding: 12px; min-height: 44px; font-size: 0.9rem; }
}

/* ---------- Layout ---------- */
.page-header {
    display: flex; align-items: center; justify-content: space-between;
    gap: var(--sp-4);
    padding: var(--sp-8) var(--sp-6) 0;
    max-width: var(--content-max);
    margin: 0 auto;
}

.page-title {
    font-size: 1.3rem; font-weight: 700;
    letter-spacing: -0.022em;
}
.page-subtitle {
    color: var(--text-muted);
    font-size: 0.875rem;
    margin-top: 3px;
}

/* ---------- Panels ---------- */
.panel {
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: var(--sp-5);
    box-shadow: var(--shadow-sm);
    /* Faint top highlight — mimics light falling from above, gives edges form */
    background-image: linear-gradient(180deg, rgba(255, 255, 255, 0.028), transparent 90px);
}

/* Opt-in hover lift for interactive cards */
.panel-interactive {
    transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
    cursor: pointer;
}
.panel-interactive:hover {
    transform: translateY(-2px);
    border-color: var(--border-strong);
    box-shadow: var(--shadow-md);
}

.panel-head {
    display: flex; align-items: center; justify-content: space-between;
    gap: var(--sp-3);
    margin-bottom: var(--sp-4);
}

.panel-title {
    font-size: 0.955rem; font-weight: 650;
    letter-spacing: -0.012em;
    display: flex; align-items: center; gap: var(--sp-2);
}
.panel-title svg { width: 15px; height: 15px; color: var(--text-muted); }

/* ---------- Stat tiles ---------- */
.stat-label {
    display: flex; align-items: center; gap: 7px;
    color: var(--text-muted);
    font-size: 0.795rem; font-weight: 550;
    letter-spacing: 0.005em;
    margin-bottom: 10px;
}
.stat-label svg { width: 14px; height: 14px; flex-shrink: 0; }

.stat-value {
    font-family: var(--font-mono);
    font-size: clamp(1.6rem, 1.3rem + 1vw, 2.1rem);
    font-weight: 600;
    letter-spacing: -0.03em;
    line-height: 1.05;
    margin-bottom: 5px;
}

.stat-sub { font-size: 0.79rem; color: var(--text-muted); }

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: var(--sp-2);
    border: 1px solid transparent;
    border-radius: var(--radius-sm);
    padding: 10px 18px;
    font-size: 0.875rem; font-weight: 600;
    cursor: pointer;
    white-space: nowrap;
    transition: background var(--transition), border-color var(--transition),
                transform var(--transition), box-shadow var(--transition), color var(--transition);
}
.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.45; cursor: not-allowed; transform: none; }
.btn svg { width: 15px; height: 15px; }

.btn-primary {
    background: var(--accent-primary);
    color: #fff;
    box-shadow: 0 1px 2px rgba(0,0,0,0.3), inset 0 1px 0 rgba(255,255,255,0.14);
}
.btn-primary:hover:not(:disabled) { background: var(--accent-primary-hover); }

.btn-ghost {
    background: rgba(255, 255, 255, 0.045);
    border-color: var(--border-color);
    color: var(--text-main);
    padding: 8px 14px;
    font-size: 0.8rem; font-weight: 550;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: background var(--transition), border-color var(--transition);
}
.btn-ghost:hover { background: rgba(255, 255, 255, 0.085); border-color: var(--border-strong); }

/* ---------- Form controls ---------- */
.input {
    width: 100%;
    background: var(--panel-bg-soft);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-main);
    padding: 10px 14px;
    font-size: 0.875rem;
    font-family: inherit;
    outline: none;
    transition: border-color var(--transition), box-shadow var(--transition);
}
.input::placeholder { color: #5a5f6b; }
.input:focus {
    border-color: var(--border-accent);
    box-shadow: 0 0 0 3px var(--accent-primary-soft);
}

/* ---------- Badges ---------- */
.badge {
    display: inline-flex; align-items: center; gap: 5px;
    padding: 4px 10px;
    border-radius: var(--radius-pill);
    font-size: 0.755rem; font-weight: 650;
    letter-spacing: 0.005em;
    white-space: nowrap;
}
.badge::before {
    content: '';
    width: 5px; height: 5px; border-radius: 50%;
    background: currentColor;
    flex-shrink: 0;
}
.badge.vpn-flag  { background: var(--accent-vpn-soft);  color: var(--accent-vpn); }
.badge.safe-flag { background: var(--accent-safe-soft); color: var(--accent-safe); }
.badge.adv-flag  { background: var(--accent-warn-soft); color: var(--accent-warn); }
.badge.tle-flag  { background: var(--accent-warn-soft); color: var(--accent-warn); }

/* Status pill with a live pulsing dot */
.status-badge {
    display: inline-flex; align-items: center; gap: var(--sp-2);
    padding: 6px 13px;
    border-radius: var(--radius-pill);
    font-size: 0.8rem; font-weight: 600;
    background: var(--accent-warn-soft);
    color: var(--accent-warn);
    border: 1px solid transparent;
    transition: background var(--transition), color var(--transition);
}
.status-dot {
    width: 7px; height: 7px; border-radius: 50%;
    background: currentColor;
    position: relative;
    flex-shrink: 0;
}
.status-dot::after {
    content: '';
    position: absolute; inset: 0;
    border-radius: 50%;
    background: currentColor;
    animation: status-ping 1.9s var(--ease-out) infinite;
}
@keyframes status-ping {
    0%   { transform: scale(1);   opacity: 0.65; }
    70%  { transform: scale(2.6); opacity: 0; }
    100% { transform: scale(2.6); opacity: 0; }
}

/* ---------- Tables ---------- */
.table-wrapper { overflow-x: auto; -webkit-overflow-scrolling: touch; }

table { width: 100%; border-collapse: collapse; }

th {
    padding: 10px 14px;
    color: var(--text-muted);
    font-size: 0.735rem; font-weight: 650;
    text-transform: uppercase;
    letter-spacing: 0.055em;
    border-bottom: 1px solid var(--border-color);
    text-align: left;
    white-space: nowrap;
}

td {
    padding: 13px 14px;
    font-size: 0.865rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.035);
    vertical-align: top;
}

tbody tr { transition: background var(--transition); }
tbody tr:hover td { background: rgba(255, 255, 255, 0.022); }
tbody tr:last-child td { border-bottom: none; }

/* ---------- Empty state ---------- */
.empty-state {
    text-align: center;
    padding: var(--sp-10) var(--sp-5);
    color: var(--text-muted);
}
.empty-state svg {
    width: 34px; height: 34px;
    opacity: 0.3;
    margin-bottom: var(--sp-3);
}
.empty-state-title {
    color: var(--text-secondary);
    font-weight: 600; font-size: 0.9rem;
    margin-bottom: 4px;
}
.empty-state-hint { font-size: 0.82rem; }

/* ---------- Loading skeletons ----------
   Live numbers used to sit at a hard "0" before the first poll returned, which
   reads as real data. A skeleton makes "not loaded yet" unambiguous. */
.skeleton {
    display: inline-block;
    min-width: 2.5ch;
    border-radius: 6px;
    color: transparent !important;
    background: linear-gradient(90deg,
        rgba(255, 255, 255, 0.045) 25%,
        rgba(255, 255, 255, 0.10)  37%,
        rgba(255, 255, 255, 0.045) 63%);
    background-size: 400% 100%;
    animation: skeleton-sweep 1.4s ease infinite;
    user-select: none;
}
@keyframes skeleton-sweep {
    0%   { background-position: 100% 50%; }
    100% { background-position: 0 50%; }
}

/* ---------- Copy to clipboard ---------- */
.copy-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    border-radius: 6px;
    cursor: pointer;
    padding: 4px 9px;
    font-size: 0.72rem; font-weight: 650;
    display: inline-flex; align-items: center; gap: 5px;
    vertical-align: middle;
    transition: all var(--transition);
}
.copy-btn:hover { color: var(--text-main); border-color: var(--border-strong); background: rgba(255,255,255,0.04); }
.copy-btn.copied { color: var(--accent-safe); border-color: var(--accent-safe); }

/* ---------- Utilities ---------- */
.scroll-x { overflow-x: auto; -webkit-overflow-scrolling: touch; }
.mono { font-family: var(--font-mono); }
.text-muted { color: var(--text-muted); }
.divider { height: 1px; background: var(--border-color); border: 0; }

@media (max-width: 700px) {
    body { font-size: 14.5px; }
    .page-header { padding: var(--sp-5) var(--sp-4) 0; flex-wrap: wrap; row-gap: 10px; }
    .panel { padding: var(--sp-4); border-radius: var(--radius-md); }
}

/* ---------- Site footer / contact ---------- */
.site-footer {
    border-top: 1px solid var(--border-color);
    margin-top: var(--sp-10);
    padding: var(--sp-8) max(var(--sp-6), var(--safe-l)) calc(var(--sp-8) + var(--safe-b));
    background: var(--bg-subtle);
}

.site-footer-inner {
    max-width: var(--content-max);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--sp-5);
    flex-wrap: wrap;
}

.footer-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    min-width: 0;
}

.footer-brand-text { min-width: 0; }

.footer-title {
    font-size: 0.9rem;
    font-weight: 700;
    letter-spacing: -0.01em;
}

.footer-tagline {
    font-size: 0.79rem;
    color: var(--text-muted);
    margin-top: 2px;
}

.footer-contact {
    display: flex;
    align-items: center;
    gap: var(--sp-2);
    flex-wrap: wrap;
}

.footer-link {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 8px 13px;
    min-height: 40px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.03);
    color: var(--text-secondary);
    font-size: 0.82rem;
    font-weight: 550;
    white-space: nowrap;
    transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.footer-link svg { width: 15px; height: 15px; flex-shrink: 0; }
.footer-link:hover {
    color: var(--text-main);
    border-color: var(--border-strong);
    background: rgba(255, 255, 255, 0.06);
}

.footer-legal {
    max-width: var(--content-max);
    margin: var(--sp-5) auto 0;
    font-size: 0.76rem;
    color: var(--text-muted);
}

@media (max-width: 700px) {
    .site-footer {
        margin-top: var(--sp-8);
        padding: var(--sp-6) max(var(--sp-4), var(--safe-l)) calc(var(--sp-6) + var(--safe-b));
    }
    .site-footer-inner { flex-direction: column; align-items: flex-start; gap: var(--sp-4); }
    /* Full-width tap targets read better than a cramped row on a phone. */
    .footer-contact { width: 100%; }
    .footer-link { flex: 1 1 auto; justify-content: center; }
}