@import url('https://fonts.googleapis.com/css2?family=Google+Sans:ital,wght@0,400;0,500;0,700;1,400&family=Google+Sans+Display:wght@400;500;700&family=IBM+Plex+Mono:wght@300;400;500&display=swap');

/* ════════════════════════════════════════════════════════════════
   M3 Expressive Design Tokens
   Light palette: teal/cyan source colour, tone 40 primary
   Dark  palette: teal/cyan source colour, tone 80 primary
   All surface containers follow the 5-level tonal stack:
   lowest · low · base · high · highest
   ════════════════════════════════════════════════════════════════ */
:root {
    /* Key colours */
    --md-primary:             #006874;
    --md-on-primary:          #ffffff;
    --md-primary-container:   #97f0ff;
    --md-on-primary-container:#001f24;
    --md-secondary:           #4a6267;
    --md-on-secondary:        #ffffff;
    --md-secondary-container: #cde7ec;
    --md-on-secondary-container:#051f23;
    --md-tertiary:            #525e7d;
    --md-on-tertiary:         #ffffff;
    --md-tertiary-container:  #dae2ff;
    --md-on-tertiary-container:#0e1836;
    --md-error:               #ba1a1a;
    --md-on-error:            #ffffff;
    --md-error-container:     #ffdad6;
    --md-on-error-container:  #410002;
    /* Surfaces */
    --md-bg:                       #f5fafb;
    --md-surface:                  #f5fafb;
    --md-surface-dim:              #d2d8d9;
    --md-surface-bright:           #f5fafb;
    --md-surface-container-lowest: #ffffff;
    --md-surface-container-low:    #eff5f6;
    --md-surface-container:        #e9eff0;
    --md-surface-container-high:   #e3e9ea;
    --md-surface-container-highest:#dde4e5;
    --md-on-surface:               #171d1e;
    --md-on-surface-variant:       #3f4849;
    --md-outline:                  #6f797a;
    --md-outline-variant:          #bec8ca;
    --md-inverse-surface:          #2b3133;
    --md-inverse-on-surface:       #ecf2f3;
    --md-inverse-primary:          #4fd8eb;
    --md-surface-tint:             #006874;
    --md-scrim:                    rgba(0,0,0,0.32);
    /* Semantic overrides */
    --ns-dl:    #006874;
    --ns-ul:    #525e7d;
    --ns-ping:  #006d3b;
    --ns-warn:  #7a5900;
    --ns-ok:    #006d3b;
    /* Typography */
    --font-display: 'Google Sans Display', 'Google Sans', sans-serif;
    --font-ui:      'Google Sans', system-ui, sans-serif;
    --font-mono:    'IBM Plex Mono', 'Courier New', monospace;
    /* M3 motion curves */
    --ease-std:  cubic-bezier(0.2, 0, 0, 1);
    --ease-dec:  cubic-bezier(0, 0, 0, 1);
    --ease-acc:  cubic-bezier(0.3, 0, 1, 1);
    --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
    /* M3 shape scale */
    --shape-none: 0;
    --shape-xs:   4px;
    --shape-sm:   8px;
    --shape-md:   12px;
    --shape-lg:   16px;
    --shape-xl:   28px;
    --shape-full: 9999px;
    /* M3 elevation tokens (tonal overlay %) */
    --elev-0: rgba(0,104,116,0.00);
    --elev-1: rgba(0,104,116,0.05);
    --elev-2: rgba(0,104,116,0.08);
    --elev-3: rgba(0,104,116,0.11);
    --elev-4: rgba(0,104,116,0.12);
    --elev-5: rgba(0,104,116,0.14);
    /* Shadows per elevation */
    --shadow-1: 0 1px 2px rgba(0,0,0,0.10);
    --shadow-2: 0 1px 2px rgba(0,0,0,0.10), 0 2px 6px rgba(0,0,0,0.07);
    --shadow-3: 0 1px 3px rgba(0,0,0,0.12), 0 4px 8px rgba(0,0,0,0.10);
}

[data-theme="dark"] {
    --md-primary:             #4fd8eb;
    --md-on-primary:          #00363d;
    --md-primary-container:   #004f58;
    --md-on-primary-container:#97f0ff;
    --md-secondary:           #b1cbd0;
    --md-on-secondary:        #1c3438;
    --md-secondary-container: #324b4f;
    --md-on-secondary-container:#cde7ec;
    --md-tertiary:            #bac3e8;
    --md-on-tertiary:         #243047;
    --md-tertiary-container:  #3b475e;
    --md-on-tertiary-container:#dae2ff;
    --md-error:               #ffb4ab;
    --md-on-error:            #690005;
    --md-error-container:     #93000a;
    --md-on-error-container:  #ffdad6;
    --md-bg:                  #0e1415;
    --md-surface:             #0e1415;
    --md-surface-dim:         #0e1415;
    --md-surface-bright:      #343a3b;
    --md-surface-container-lowest:#091011;
    --md-surface-container-low:   #171d1e;
    --md-surface-container:       #1b2122;
    --md-surface-container-high:  #252b2c;
    --md-surface-container-highest:#303637;
    --md-on-surface:          #dde4e5;
    --md-on-surface-variant:  #bec8ca;
    --md-outline:             #899394;
    --md-outline-variant:     #3f4849;
    --md-inverse-surface:     #dde4e5;
    --md-inverse-on-surface:  #2b3133;
    --md-inverse-primary:     #006874;
    --md-surface-tint:        #4fd8eb;
    --md-scrim:               rgba(0,0,0,0.5);
    --ns-dl:   #4fd8eb;
    --ns-ul:   #bac3e8;
    --ns-ping: #6dd58c;
    --ns-warn: #ffb951;
    --ns-ok:   #6dd58c;
    --elev-0: rgba(79,216,235,0.00);
    --elev-1: rgba(79,216,235,0.05);
    --elev-2: rgba(79,216,235,0.08);
    --elev-3: rgba(79,216,235,0.11);
    --elev-4: rgba(79,216,235,0.12);
    --elev-5: rgba(79,216,235,0.14);
    --shadow-1: 0 1px 2px rgba(0,0,0,0.3);
    --shadow-2: 0 1px 2px rgba(0,0,0,0.3), 0 2px 6px rgba(0,0,0,0.2);
    --shadow-3: 0 1px 3px rgba(0,0,0,0.35), 0 4px 8px rgba(0,0,0,0.28);
}

/* ── Reset ──────────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; scroll-behavior: smooth; }
body {
    font-family: var(--font-ui);
    background: var(--md-bg);
    color: var(--md-on-surface);
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    transition: background 0.35s var(--ease-std), color 0.35s var(--ease-std);
    overflow-x: hidden;
}
::selection { background: var(--md-primary-container); color: var(--md-on-primary-container); }
:focus-visible { outline: 3px solid var(--md-primary); outline-offset: 3px; border-radius: var(--shape-xs); }

/* ── M3 State Layers ────────────────────────────────────────────── */
/* Applied via pseudo-element; opacity changes per state */
.sl { position: relative; overflow: hidden; cursor: pointer; }
.sl::after {
    content: ''; position: absolute; inset: 0;
    background: currentColor; opacity: 0;
    transition: opacity 0.18s var(--ease-std);
    pointer-events: none; border-radius: inherit;
}
.sl:hover::after  { opacity: 0.08; }
.sl:active::after { opacity: 0.12; }
.sl:focus-visible::after { opacity: 0.12; }

/* ── Ripple ─────────────────────────────────────────────────────── */
.rip { position: relative; overflow: hidden; }
.ripple-el {
    position: absolute; border-radius: 50%;
    transform: scale(0); pointer-events: none;
    background: currentColor; opacity: 0.16;
    animation: ripple-go 0.55s var(--ease-dec) forwards;
}
@keyframes ripple-go { to { transform: scale(4); opacity: 0; } }

/* ── Top App Bar ────────────────────────────────────────────────── */
header {
    position: sticky; top: 0; z-index: 200;
    display: flex; align-items: center; justify-content: space-between;
    height: 64px; padding: 0 8px 0 16px;
    background: var(--md-surface-container);
    transition: background 0.35s var(--ease-std), box-shadow 0.25s var(--ease-std);
}
header.elevated { box-shadow: var(--shadow-2); }

.logo {
    display: flex; align-items: center; gap: 10px;
    text-decoration: none; color: inherit; user-select: none;
}
.logo-mark {
    width: 36px; height: 36px;
    border-radius: var(--shape-sm);
    flex-shrink: 0;
    transition: transform 0.4s var(--ease-spring);
}
.logo:hover .logo-mark { transform: rotate(-8deg) scale(1.05); }
.logo-wordmark {
    display: flex; flex-direction: column; gap: 0; line-height: 1;
}
.logo-name {
    font-family: var(--font-display);
    font-size: 1.25rem; font-weight: 500; letter-spacing: -0.01em;
    color: var(--md-on-surface);
}
.logo-tagline {
    font-size: 0.62rem; font-weight: 500; letter-spacing: 0.06em;
    text-transform: uppercase; color: var(--md-on-surface-variant);
}

.header-nav { display: flex; align-items: center; gap: 4px; }

.icon-btn {
    background: none; border: none; cursor: pointer;
    width: 48px; height: 48px; border-radius: var(--shape-full);
    display: flex; align-items: center; justify-content: center;
    color: var(--md-on-surface-variant);
    transition: background 0.18s var(--ease-std), color 0.18s;
    position: relative; overflow: hidden;
    flex-shrink: 0;
}
.icon-btn svg { width: 24px; height: 24px; pointer-events: none; }
.icon-btn:hover { background: color-mix(in srgb, var(--md-on-surface-variant) 8%, transparent); color: var(--md-on-surface); }
.icon-btn:active { background: color-mix(in srgb, var(--md-on-surface-variant) 12%, transparent); }

/* ── Main ───────────────────────────────────────────────────────── */
main {
    flex: 1; display: flex; flex-direction: column;
    align-items: center; gap: 12px;
    padding: 16px 16px 56px; max-width: 620px;
    margin: 0 auto; width: 100%;
}

/* ── Server Chip (Assist Chip) ──────────────────────────────────── */
.server-chip {
    display: flex; align-items: center; gap: 8px;
    padding: 6px 12px 6px 6px;
    background: var(--md-surface-container-low);
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--shape-full);
    cursor: pointer; color: var(--md-on-surface);
    font-family: var(--font-ui);
    transition: background 0.18s var(--ease-std), border-color 0.18s, box-shadow 0.18s;
    align-self: flex-start;
    animation: enter-up 0.4s var(--ease-dec) both;
}
.server-chip:hover {
    background: var(--md-surface-container);
    border-color: var(--md-outline);
    box-shadow: var(--shadow-1);
}
.server-chip-avatar {
    width: 30px; height: 30px; border-radius: var(--shape-full);
    background: var(--md-primary-container);
    color: var(--md-on-primary-container);
    display: flex; align-items: center; justify-content: center;
    flex-shrink: 0; transition: background 0.3s, color 0.3s;
}
.server-chip-avatar svg { width: 16px; height: 16px; }
.server-chip-info { display: flex; flex-direction: column; gap: 1px; }
.server-chip-label { font-size: 0.65rem; font-weight: 500; letter-spacing: 0.06em; text-transform: uppercase; color: var(--md-on-surface-variant); line-height: 1; }
.server-chip-name  { font-size: 0.875rem; font-weight: 500; color: var(--md-on-surface); line-height: 1.2; }
.server-status-dot { width: 8px; height: 8px; border-radius: var(--shape-full); flex-shrink: 0; transition: background 0.3s; }
.server-status-dot.ok   { background: var(--ns-ok); }
.server-status-dot.warn { background: var(--ns-warn); animation: blink 1.5s ease infinite; }
@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.4} }
.server-chip-chevron { color: var(--md-on-surface-variant); }
.server-chip-chevron svg { width: 16px; height: 16px; }

/* ── Gauge Card ─────────────────────────────────────────────────── */
.gauge-card {
    width: 100%;
    background: var(--md-surface-container-low);
    border-radius: var(--shape-xl);
    padding: 20px 20px 16px;
    display: flex; flex-direction: column; align-items: center;
    position: relative; overflow: hidden;
    animation: enter-up 0.45s var(--ease-dec) 0.04s both;
}
/* Subtle tonal scrim behind gauge arc */
.gauge-card::before {
    content: ''; position: absolute; inset: 0; pointer-events: none;
    background: radial-gradient(ellipse 90% 70% at 50% 105%,
        color-mix(in srgb, var(--md-primary) 10%, transparent) 0%,
        transparent 65%);
    transition: opacity 0.6s var(--ease-std);
}

.gauge-wrapper { position: relative; width: 100%; max-width: 320px; }
.gauge-svg { width: 100%; height: auto; overflow: visible; display: block; }

.g-track {
    fill: none; stroke: var(--md-surface-container-highest);
    stroke-width: 10; stroke-linecap: round;
    transition: stroke 0.35s var(--ease-std);
}
.g-prog {
    fill: none; stroke: var(--md-primary);
    stroke-width: 10; stroke-linecap: round;
    transition: stroke-dasharray 0.09s linear, stroke 0.4s var(--ease-std),
                filter 0.4s var(--ease-std);
    filter: drop-shadow(0 0 6px color-mix(in srgb,var(--md-primary) 55%,transparent));
}
.g-prog.upload {
    stroke: var(--md-tertiary);
    filter: drop-shadow(0 0 6px color-mix(in srgb,var(--md-tertiary) 55%,transparent));
}

.g-ticks line  { stroke: var(--md-outline-variant); stroke-linecap: round; }
.g-ticks .major { stroke: var(--md-outline); }
.g-ticks text {
    fill: var(--md-on-surface-variant); font-family: var(--font-mono);
    font-size: 7px; dominant-baseline: middle; text-anchor: middle;
}

.gauge-center {
    position: absolute; inset: 0;
    display: flex; flex-direction: column; align-items: center; justify-content: center;
    padding-bottom: 16%;
}

.speed-row { display: flex; align-items: baseline; gap: 3px; }
.speed-int {
    font-family: var(--font-mono);
    font-size: clamp(2.8rem, 9vw, 4.2rem);
    font-weight: 300; line-height: 1; letter-spacing: -0.03em;
    color: var(--md-on-surface);
    transition: color 0.4s var(--ease-std);
    min-width: 3.5ch; text-align: right;
}
.speed-dec {
    font-family: var(--font-mono);
    font-size: clamp(1.1rem, 3vw, 1.5rem);
    font-weight: 300; line-height: 1;
    color: var(--md-on-surface-variant);
    opacity: 0; transform: translateY(3px);
    transition: opacity 0.25s, transform 0.25s var(--ease-dec), color 0.4s;
}
.speed-dec.show { opacity: 1; transform: translateY(0); }
.speed-unit {
    font-size: 0.7rem; font-weight: 500; letter-spacing: 0.08em;
    text-transform: uppercase; color: var(--md-on-surface-variant); margin-top: 2px;
}
.phase-lbl {
    font-size: 0.7rem; font-weight: 500; letter-spacing: 0.07em;
    text-transform: uppercase; color: var(--md-on-surface-variant);
    min-height: 1em; transition: opacity 0.2s, transform 0.2s;
}
.phase-lbl.fade { opacity: 0; transform: translateY(-3px); }

/* Ping dots */
.ping-dots { display: flex; gap: 3.5px; align-items: center; margin-top: 5px; flex-wrap: wrap; justify-content: center; max-width: 140px; }
.p-dot {
    width: 5px; height: 5px; border-radius: var(--shape-full);
    background: var(--md-outline-variant);
    transition: background 0.12s, transform 0.2s var(--ease-spring);
}
.p-dot.done   { background: var(--ns-ping); transform: scale(1.2); }
.p-dot.active { background: var(--md-primary); animation: dot-pop 0.35s var(--ease-spring); }
@keyframes dot-pop { 0%{transform:scale(1)} 50%{transform:scale(1.8)} 100%{transform:scale(1.2)} }

/* Mini speed graph */
.graph-wrap {
    width: 100%; max-width: 320px; height: 36px;
    opacity: 0; transition: opacity 0.4s var(--ease-dec);
    margin-top: 8px; flex-shrink: 0;
}
.graph-wrap.show { opacity: 1; }
.graph-svg { width: 100%; height: 100%; overflow: visible; }
.g-line { fill: none; stroke: var(--md-primary); stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; transition: stroke 0.4s; }
.g-line.ul { stroke: var(--md-tertiary); }
.g-area { opacity: 0.12; transition: fill 0.4s; }
.g-area.dl { fill: var(--md-primary); }
.g-area.ul { fill: var(--md-tertiary); }

/* ── Action Row ─────────────────────────────────────────────────── */
.action-row {
    display: flex; align-items: center; justify-content: center; gap: 12px;
    animation: enter-up 0.5s var(--ease-dec) 0.08s both;
}

/* Extended FAB */
.efab {
    display: flex; align-items: center; gap: 10px;
    padding: 0 24px; height: 56px; min-width: 130px;
    background: var(--md-primary-container);
    color: var(--md-on-primary-container);
    border: none; border-radius: var(--shape-xl);
    font-family: var(--font-ui); font-size: 0.9375rem; font-weight: 500;
    letter-spacing: 0.006em; cursor: pointer;
    box-shadow: var(--shadow-2);
    transition: background 0.2s var(--ease-std), color 0.2s,
                box-shadow 0.25s var(--ease-std), transform 0.25s var(--ease-spring);
    position: relative; overflow: hidden;
}
.efab svg { width: 22px; height: 22px; transition: transform 0.4s var(--ease-spring); flex-shrink: 0; }
.efab:hover { box-shadow: var(--shadow-3); transform: translateY(-2px); }
.efab:hover svg { transform: rotate(12deg) scale(1.1); }
.efab:active { transform: scale(0.97); box-shadow: var(--shadow-1); }
.efab:disabled {
    background: color-mix(in srgb, var(--md-on-surface) 12%, transparent);
    color: color-mix(in srgb, var(--md-on-surface) 38%, transparent);
    box-shadow: none; cursor: not-allowed; transform: none;
}
.efab.testing {
    background: var(--md-primary); color: var(--md-on-primary);
    animation: efab-pulse 2s ease infinite;
}
@keyframes efab-pulse {
    0%,100% { box-shadow: var(--shadow-2), 0 0 0 0 color-mix(in srgb,var(--md-primary) 35%,transparent); }
    50%      { box-shadow: var(--shadow-2), 0 0 0 10px transparent; }
}

/* Stop FAB */
.stop-fab {
    display: none; align-items: center; justify-content: center;
    width: 56px; height: 56px; border-radius: var(--shape-xl);
    background: var(--md-error-container); color: var(--md-error);
    border: none; cursor: pointer; box-shadow: var(--shadow-1);
    transition: all 0.2s var(--ease-std);
    position: relative; overflow: hidden;
}
.stop-fab svg { width: 22px; height: 22px; }
.stop-fab:hover { transform: scale(1.06); box-shadow: var(--shadow-2); }

/* Share text button */
.share-tbtn {
    display: none; align-items: center; gap: 8px;
    padding: 0 18px; height: 40px;
    background: none; border: 1px solid var(--md-outline);
    border-radius: var(--shape-full); color: var(--md-primary);
    font-family: var(--font-ui); font-size: 0.875rem; font-weight: 500;
    cursor: pointer; transition: all 0.18s var(--ease-std);
    position: relative; overflow: hidden;
}
.share-tbtn svg { width: 18px; height: 18px; }
.share-tbtn:hover { background: color-mix(in srgb,var(--md-primary) 8%,transparent); border-color: var(--md-primary); }

/* ── 2×2 Metric Grid ────────────────────────────────────────────── */
.metrics-grid {
    display: grid; grid-template-columns: 1fr 1fr; gap: 8px; width: 100%;
    animation: enter-up 0.55s var(--ease-dec) 0.12s both;
}

.mc {
    background: var(--md-surface-container-low);
    border-radius: var(--shape-lg); padding: 14px 14px 12px;
    display: flex; flex-direction: column; gap: 6px;
    position: relative; overflow: hidden;
    transition: background 0.3s var(--ease-std), transform 0.3s var(--ease-spring), box-shadow 0.3s;
}
/* Top accent stripe — slides in from left */
.mc::before {
    content: ''; position: absolute; top: 0; left: 0; right: 0; height: 3px;
    transform: scaleX(0); transform-origin: left;
    transition: transform 0.4s var(--ease-dec);
    border-radius: 0 0 3px 3px;
}
.mc.dl::before { background: var(--ns-dl); }
.mc.ul::before { background: var(--ns-ul); }
.mc.pg::before { background: var(--ns-ping); }
.mc.jt::before { background: var(--ns-ping); }
.mc.active::before  { transform: scaleX(1); }
.mc.active          { background: var(--md-surface-container); }
.mc.phase-hi        { background: var(--md-surface-container); transform: translateY(-3px); box-shadow: var(--shadow-2); }

.mc-icon {
    width: 32px; height: 32px; border-radius: var(--shape-sm);
    display: flex; align-items: center; justify-content: center;
    transition: background 0.3s, color 0.3s;
}
.mc-icon svg { width: 18px; height: 18px; }
.mc.dl .mc-icon { background: var(--md-primary-container);   color: var(--md-on-primary-container); }
.mc.ul .mc-icon { background: var(--md-tertiary-container);  color: var(--md-on-tertiary-container); }
.mc.pg .mc-icon, .mc.jt .mc-icon { background: var(--md-secondary-container); color: var(--md-on-secondary-container); }

.mc-label { font-size: 0.68rem; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; color: var(--md-on-surface-variant); }
.mc-val-row { display: flex; align-items: baseline; gap: 3px; }
.mc-val {
    font-family: var(--font-mono); font-size: 1.55rem; font-weight: 400;
    line-height: 1; color: var(--md-on-surface);
    transition: color 0.3s var(--ease-std);
}
.mc.dl.active .mc-val { color: var(--ns-dl); }
.mc.ul.active .mc-val { color: var(--ns-ul); }
.mc.pg.active .mc-val, .mc.jt.active .mc-val { color: var(--ns-ping); }
.mc-unit { font-size: 0.62rem; font-weight: 500; letter-spacing: 0.07em; text-transform: uppercase; color: var(--md-on-surface-variant); padding-bottom: 2px; }
.mc-rating { font-size: 0.68rem; font-weight: 500; color: var(--md-on-surface-variant); min-height: 1em; transition: color 0.3s; }

/* ── Loaded Latency / Bufferbloat card ──────────────────────────── */
.bloat-card {
    width: 100%; border-radius: var(--shape-lg);
    background: var(--md-surface-container-low);
    padding: 14px 16px; display: flex; align-items: center; gap: 14px;
    opacity: 0; transform: translateY(6px);
    transition: opacity 0.4s var(--ease-dec), transform 0.4s var(--ease-spring);
}
.bloat-card.show { opacity: 1; transform: translateY(0); }
.bloat-grade-circle {
    width: 48px; height: 48px; border-radius: var(--shape-full); flex-shrink: 0;
    display: flex; align-items: center; justify-content: center;
    font-family: var(--font-display); font-size: 1.5rem; font-weight: 700;
    background: var(--md-primary-container); color: var(--md-on-primary-container);
    transition: background 0.4s, color 0.4s;
}
.bloat-body { flex: 1; min-width: 0; }
.bloat-title { font-size: 0.85rem; font-weight: 600; color: var(--md-on-surface); }
.bloat-desc  { font-size: 0.75rem; color: var(--md-on-surface-variant); line-height: 1.45; margin-top: 2px; }
.bloat-detail { font-family: var(--font-mono); font-size: 0.7rem; color: var(--md-on-surface-variant); margin-top: 3px; }

/* ── Speed Rating card ──────────────────────────────────────────── */
.rating-card {
    width: 100%; border-radius: var(--shape-lg);
    background: var(--md-surface-container-low);
    padding: 14px 16px; display: flex; align-items: center; gap: 12px;
    opacity: 0; transform: translateY(6px);
    transition: opacity 0.4s var(--ease-dec) 0.1s, transform 0.4s var(--ease-spring) 0.1s;
}
.rating-card.show { opacity: 1; transform: translateY(0); }
.rating-emoji { font-size: 2rem; flex-shrink: 0; line-height: 1; }
.rating-body { flex: 1; min-width: 0; }
.rating-title { font-size: 0.9rem; font-weight: 600; color: var(--md-on-surface); }
.rating-desc  { font-size: 0.75rem; color: var(--md-on-surface-variant); line-height: 1.45; margin-top: 2px; }
.rating-speed { font-family: var(--font-mono); font-size: 1.35rem; font-weight: 400; color: var(--md-primary); transition: color 0.4s; flex-shrink: 0; }

/* ── Info Card ──────────────────────────────────────────────────── */
.info-card {
    width: 100%; border-radius: var(--shape-lg); overflow: hidden;
    background: var(--md-surface-container-low);
    animation: enter-up 0.6s var(--ease-dec) 0.18s both;
}
.info-row { display: flex; align-items: stretch; border-bottom: 1px solid var(--md-outline-variant); }
.info-row:last-child { border-bottom: none; }
.info-cell { flex: 1; padding: 11px 14px; display: flex; flex-direction: column; gap: 3px; border-right: 1px solid var(--md-outline-variant); }
.info-cell:last-child { border-right: none; }
.info-lbl { font-size: 0.65rem; font-weight: 500; letter-spacing: 0.07em; text-transform: uppercase; color: var(--md-on-surface-variant); }
.info-val { font-family: var(--font-mono); font-size: 0.78rem; color: var(--md-on-surface); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.badge {
    display: inline-flex; align-items: center; gap: 4px;
    padding: 2px 8px; border-radius: var(--shape-full);
    font-family: var(--font-ui); font-size: 0.68rem; font-weight: 500;
    letter-spacing: 0.03em;
    background: var(--md-secondary-container); color: var(--md-on-secondary-container);
    transition: background 0.3s, color 0.3s;
}

/* ── Packet Loss Indicator ──────────────────────────────────────── */
.loss-bar-wrap { display: flex; flex-direction: column; gap: 3px; }
.loss-bar-track { height: 4px; background: var(--md-outline-variant); border-radius: var(--shape-full); overflow: hidden; }
.loss-bar-fill { height: 100%; border-radius: var(--shape-full); background: var(--ns-ok); transition: width 0.6s var(--ease-std), background 0.4s; }

/* ── Panels (Side Sheet) ────────────────────────────────────────── */
.scrim {
    position: fixed; inset: 0; background: var(--md-scrim); z-index: 300;
    opacity: 0; pointer-events: none; transition: opacity 0.3s var(--ease-std);
}
.scrim.on { opacity: 1; pointer-events: all; }

.side-sheet {
    position: fixed; top: 0; right: 0; bottom: 0;
    width: min(400px, 96vw);
    background: var(--md-surface-container-low);
    z-index: 400; display: flex; flex-direction: column;
    border-radius: var(--shape-xl) 0 0 var(--shape-xl);
    transform: translateX(100%);
    transition: transform 0.35s var(--ease-dec);
    box-shadow: var(--shadow-3);
}
.side-sheet.on { transform: translateX(0); }

.ss-header { display: flex; align-items: center; justify-content: space-between; padding: 20px 12px 12px 20px; flex-shrink: 0; }
.ss-title { font-family: var(--font-display); font-size: 1.375rem; font-weight: 400; color: var(--md-on-surface); }
.ss-actions { display: flex; gap: 4px; align-items: center; }
.ss-body { flex: 1; overflow-y: auto; padding: 4px 16px 32px; display: flex; flex-direction: column; gap: 12px; scrollbar-width: thin; scrollbar-color: var(--md-outline-variant) transparent; }

/* Settings groups */
.sg { display: flex; flex-direction: column; gap: 8px; }
.sg-label { font-size: 0.72rem; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; color: var(--md-primary); padding: 8px 4px 2px; }
.field { display: flex; flex-direction: column; gap: 4px; }
.field > label { font-size: 0.8rem; font-weight: 500; color: var(--md-on-surface-variant); padding: 0 4px; }
.field input, .field select {
    background: var(--md-surface-container); border: none; border-radius: var(--shape-sm);
    padding: 12px 14px; color: var(--md-on-surface); font-family: var(--font-mono); font-size: 0.83rem;
    outline: none; width: 100%; -webkit-appearance: none;
    transition: background 0.18s, box-shadow 0.18s;
}
.field input:focus, .field select:focus { box-shadow: 0 0 0 2px var(--md-primary); }
.field .hint { font-size: 0.7rem; color: var(--md-on-surface-variant); padding: 0 4px; line-height: 1.55; }
.field .hint a { color: var(--md-primary); }

.btn-filled {
    background: var(--md-primary); color: var(--md-on-primary);
    border: none; border-radius: var(--shape-full);
    padding: 0 24px; height: 40px; width: 100%;
    font-family: var(--font-ui); font-size: 0.875rem; font-weight: 500;
    letter-spacing: 0.006em; cursor: pointer;
    transition: box-shadow 0.18s var(--ease-std), opacity 0.18s;
    position: relative; overflow: hidden;
}
.btn-filled:hover { box-shadow: var(--shadow-1); opacity: 0.9; }

.btn-tonal {
    background: var(--md-secondary-container); color: var(--md-on-secondary-container);
    border: none; border-radius: var(--shape-full); padding: 0 16px; height: 36px;
    font-family: var(--font-ui); font-size: 0.8rem; font-weight: 500;
    cursor: pointer; display: inline-flex; align-items: center; gap: 6px;
    transition: box-shadow 0.18s; position: relative; overflow: hidden;
}
.btn-tonal svg { width: 16px; height: 16px; }
.btn-tonal:hover { box-shadow: var(--shadow-1); }

.btn-text-err {
    background: none; color: var(--md-error);
    border: none; border-radius: var(--shape-full); padding: 0 12px; height: 36px;
    font-family: var(--font-ui); font-size: 0.8rem; font-weight: 500; cursor: pointer;
    transition: background 0.18s;
}
.btn-text-err:hover { background: color-mix(in srgb,var(--md-error) 8%,transparent); }

/* History items */
.hist-empty { display: flex; flex-direction: column; align-items: center; gap: 8px; padding: 48px 16px; color: var(--md-on-surface-variant); text-align: center; font-size: 0.875rem; }
.hist-empty svg { width: 48px; height: 48px; opacity: 0.35; }
.hist-item { background: var(--md-surface-container); border-radius: var(--shape-lg); padding: 12px 14px; display: flex; flex-direction: column; gap: 8px; animation: enter-up 0.3s var(--ease-dec) both; }
.hist-meta { display: flex; justify-content: space-between; align-items: flex-start; }
.hist-date { font-family: var(--font-mono); font-size: 0.7rem; color: var(--md-on-surface-variant); }
.hist-server { font-size: 0.7rem; font-weight: 500; color: var(--md-on-surface-variant); max-width: 52%; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.hist-metrics { display: flex; gap: 18px; }
.hm { display: flex; flex-direction: column; gap: 1px; }
.hm-lbl { font-size: 0.58rem; font-weight: 500; letter-spacing: 0.08em; text-transform: uppercase; color: var(--md-on-surface-variant); }
.hm-val { font-family: var(--font-mono); font-size: 1rem; color: var(--md-on-surface); }
.hm-unit { font-size: 0.58rem; color: var(--md-on-surface-variant); }

/* ── Bottom Sheet (Share) ───────────────────────────────────────── */
.bs-scrim { position: fixed; inset: 0; background: var(--md-scrim); z-index: 500; opacity: 0; pointer-events: none; transition: opacity 0.3s var(--ease-std); }
.bs-scrim.on { opacity: 1; pointer-events: all; }
.bs {
    position: fixed; bottom: 0; left: 50%; z-index: 600;
    transform: translateX(-50%) translateY(110%);
    width: min(480px, 100vw);
    background: var(--md-surface-container-low);
    border-radius: var(--shape-xl) var(--shape-xl) 0 0;
    transition: transform 0.35s var(--ease-dec);
    box-shadow: var(--shadow-3);
}
.bs.on { transform: translateX(-50%) translateY(0); }
.bs-handle { width: 32px; height: 4px; background: var(--md-outline-variant); border-radius: var(--shape-full); margin: 12px auto 0; }
.bs-header { display: flex; align-items: center; justify-content: space-between; padding: 10px 16px 6px; }
.bs-title { font-family: var(--font-display); font-size: 1rem; font-weight: 500; }
.bs-body { padding: 0 16px 28px; display: flex; flex-direction: column; gap: 10px; }
.share-pre { background: var(--md-surface-container); border-radius: var(--shape-md); padding: 14px; font-family: var(--font-mono); font-size: 0.75rem; line-height: 1.8; color: var(--md-on-surface); white-space: pre; overflow-x: auto; user-select: all; }

/* ── Footer ─────────────────────────────────────────────────────── */
footer {
    padding: 14px 20px; border-top: 1px solid var(--md-outline-variant);
    background: var(--md-surface-container-low);
    display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 8px;
}
.f-links { display: flex; align-items: center; gap: 4px; flex-wrap: wrap; }
.f-link { color: var(--md-primary); text-decoration: none; font-size: 0.78rem; font-weight: 500; padding: 4px 8px; border-radius: var(--shape-full); transition: background 0.18s; }
.f-link:hover { background: color-mix(in srgb,var(--md-primary) 8%,transparent); }
.f-sep { color: var(--md-outline-variant); font-size: 0.65rem; }
.f-copy { font-size: 0.7rem; color: var(--md-on-surface-variant); }

/* ── Animations ─────────────────────────────────────────────────── */
@keyframes enter-up {
    from { opacity: 0; transform: translateY(14px); }
    to   { opacity: 1; transform: translateY(0); }
}
@keyframes count-in {
    from { opacity: 0; transform: translateY(-16px); }
    to   { opacity: 1; transform: translateY(0); }
}
.count-anim { animation: count-in 0.22s var(--ease-dec) both; }

/* ── Responsive ─────────────────────────────────────────────────── */
@media (max-width: 480px) {
    main { padding: 12px 12px 48px; gap: 10px; }
    header { padding: 0 4px 0 12px; height: 56px; }
    .logo-tagline { display: none; }
    .mc-val { font-size: 1.3rem; }
    .speed-int { font-size: clamp(2.5rem, 10vw, 3.5rem); }
    .metrics-grid { gap: 6px; }
}