/* ============================================================
   SpeedTest — Thème Light (inspiré EuropeSoftwares)
   Palette : blanc / gris-ciel / bleu royal #003399
   ============================================================ */

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

:root {
    --bg:          #F4F6FA;
    --surface:     #FFFFFF;
    --border:      #D0D8E8;
    --border-soft: #E8EDF5;

    --blue:        #003399;
    --blue-mid:    #0055CC;
    --blue-light:  #E8EEFF;
    --blue-accent: #0044BB;

    --text:        #1A1A2E;
    --text-sub:    #5A6070;
    --text-faint:  #9AA3B5;

    --green:       #0A7C42;
    --orange:      #C05800;
    --red:         #B00020;

    --radius:      4px;
    --radius-md:   8px;
    --shadow-card: 0 1px 4px rgba(0,30,100,.07), 0 4px 16px rgba(0,30,100,.05);
    --shadow-btn:  0 2px 6px rgba(0,51,153,.25);
    --font-ui:     'Inter', system-ui, sans-serif;
    --font-data:   'JetBrains Mono', monospace;
}

html { font-size: 15px; -webkit-font-smoothing: antialiased; }

body {
    font-family: var(--font-ui);
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ── Header ───────────────────────────────────────────────── */
.site-header {
    background: var(--surface);
    border-bottom: 2px solid var(--blue);
    padding: 0 2rem;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 8px rgba(0,30,100,.08);
}

.logo {
    display: flex;
    align-items: center;
    gap: .5rem;
    text-decoration: none;
    color: inherit;
}

.logo-icon {
    color: var(--blue);
    font-size: 1.35rem;
    line-height: 1;
}

.logo-text {
    font-family: var(--font-ui);
    font-size: .95rem;
    font-weight: 400;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--text);
}

.logo-text strong {
    color: var(--blue);
    font-weight: 700;
}

.header-nav { display: flex; gap: .25rem; }

.nav-link {
    text-decoration: none;
    font-size: .85rem;
    font-weight: 500;
    letter-spacing: .04em;
    color: var(--text-sub);
    padding: .35rem .9rem;
    border-radius: var(--radius);
    border: 1px solid transparent;
    transition: all .15s;
}

.nav-link:hover {
    color: var(--blue);
    background: var(--blue-light);
    border-color: var(--border);
}

.nav-link.active {
    color: var(--surface);
    background: var(--blue);
    border-color: var(--blue);
}

/* ── Main layout ──────────────────────────────────────────── */
.main-container {
    flex: 1;
    max-width: 900px;
    width: 100%;
    margin: 0 auto;
    padding: 2rem 1.5rem 3rem;
}

/* ── Gauge section ────────────────────────────────────────── */
.gauge-section { display: flex; flex-direction: column; align-items: center; gap: 2rem; }

.gauge-wrap { position: relative; display: flex; flex-direction: column; align-items: center; gap: 1rem; }

#speedGauge {
    width: 300px;
    height: 263px; /* ratio 320/280 × 300 */
}

/* Restyle SVG elements for light theme */
#speedValue { fill: var(--text) !important; }
#speedUnit  { fill: var(--blue) !important; }

/* Phase label */
.phase-label {
    font-family: var(--font-ui);
    font-size: .8rem;
    font-weight: 600;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--blue);
    background: var(--blue-light);
    border: 1px solid var(--border);
    padding: .3rem .9rem;
    border-radius: 999px;
}

/* ── Metrics row ──────────────────────────────────────────── */
.metrics-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    width: 100%;
}

.metric-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1rem .75rem;
    text-align: center;
    box-shadow: var(--shadow-card);
    transition: border-color .2s, box-shadow .2s;
}

.metric-card:hover {
    border-color: var(--blue);
    box-shadow: 0 2px 12px rgba(0,51,153,.12);
}

.metric-icon {
    font-size: 1.1rem;
    color: var(--blue);
    margin-bottom: .4rem;
    line-height: 1;
}

.metric-value {
    font-family: var(--font-data);
    font-size: 1.55rem;
    font-weight: 700;
    color: var(--text);
    line-height: 1;
    margin-bottom: .2rem;
}

.metric-label {
    font-size: .7rem;
    font-weight: 600;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--text-sub);
    margin-bottom: .15rem;
}

.metric-unit {
    font-family: var(--font-data);
    font-size: .7rem;
    color: var(--blue-mid);
}

/* ── Action zone ──────────────────────────────────────────── */
.action-zone {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1rem;
    width: 100%;
}

.start-btn {
    position: relative;
    background: var(--blue);
    color: #fff;
    border: none;
    border-radius: var(--radius-md);
    padding: .85rem 2.5rem;
    font-family: var(--font-ui);
    font-size: .95rem;
    font-weight: 600;
    letter-spacing: .06em;
    cursor: pointer;
    box-shadow: var(--shadow-btn);
    transition: background .15s, transform .1s, box-shadow .15s;
    overflow: visible;
}

.start-btn:hover  { background: var(--blue-accent); box-shadow: 0 4px 14px rgba(0,51,153,.35); transform: translateY(-1px); }
.start-btn:active { transform: translateY(0); box-shadow: var(--shadow-btn); }

.btn-inner  { display: flex; align-items: center; gap: .5rem; position: relative; z-index: 1; }
.btn-ring   { display: none; } /* masqué en light */

/* Progress bar */
.progress-bar {
    width: 100%;
    max-width: 400px;
    height: 4px;
    background: var(--border);
    border-radius: 999px;
    overflow: hidden;
}

.progress-fill {
    height: 100%;
    background: var(--blue);
    border-radius: 999px;
    width: 0%;
    transition: width .3s;
}

.status-msg {
    font-size: .82rem;
    color: var(--text-sub);
    min-height: 1.2em;
    text-align: center;
}

/* ── Server info ──────────────────────────────────────────── */
.server-info {
    display: flex;
    align-items: center;
    gap: .5rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: .45rem 1rem;
    font-size: .78rem;
    color: var(--text-sub);
}

.server-dot {
    width: 7px; height: 7px;
    border-radius: 50%;
    background: var(--green);
    flex-shrink: 0;
}

.server-text { color: var(--text-sub); }

.server-sep { color: var(--border); }

/* ── Footer ───────────────────────────────────────────────── */
.site-footer {
    background: var(--surface);
    border-top: 1px solid var(--border);
    padding: .9rem 2rem;
    text-align: center;
    font-size: .75rem;
    color: var(--text-faint);
    letter-spacing: .04em;
}

/* ============================================================
   History page
   ============================================================ */
.history-main { max-width: 100%; }

.history-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
    gap: .75rem;
}

.history-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: -.01em;
}

.history-actions { display: flex; gap: .5rem; }

/* ── Buttons secondary/danger ─────────────────────────────── */
.btn-secondary, .btn-danger {
    border: 1px solid;
    border-radius: var(--radius);
    padding: .4rem .9rem;
    font-family: var(--font-ui);
    font-size: .8rem;
    font-weight: 600;
    cursor: pointer;
    transition: all .15s;
    letter-spacing: .03em;
}

.btn-secondary {
    background: var(--surface);
    color: var(--blue);
    border-color: var(--blue);
}
.btn-secondary:hover { background: var(--blue); color: #fff; }

.btn-danger {
    background: var(--surface);
    color: var(--red);
    border-color: var(--red);
}
.btn-danger:hover { background: var(--red); color: #fff; }

/* ── Stats summary ────────────────────────────────────────── */
.stats-summary {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-box {
    background: var(--surface);
    border: 1px solid var(--border);
    border-top: 3px solid var(--blue);
    border-radius: var(--radius-md);
    padding: 1rem;
    text-align: center;
    box-shadow: var(--shadow-card);
}

.stat-val {
    font-family: var(--font-data);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--blue);
    margin-bottom: .25rem;
}

.stat-lbl {
    font-size: .7rem;
    font-weight: 600;
    letter-spacing: .06em;
    text-transform: uppercase;
    color: var(--text-sub);
}

/* ── Chart ────────────────────────────────────────────────── */
.chart-container {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 1.25rem 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-card);
}

.chart-title {
    font-size: .78rem;
    font-weight: 600;
    letter-spacing: .08em;
    text-transform: uppercase;
    color: var(--text-sub);
    margin-bottom: .75rem;
}

.chart-wrap { overflow-x: auto; }
.chart-wrap canvas { max-width: 100%; }

/* ── History table ────────────────────────────────────────── */
.table-wrap {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-card);
}

.history-table {
    width: 100%;
    border-collapse: collapse;
    font-size: .82rem;
}

.history-table thead tr {
    background: var(--blue);
    color: #fff;
}

.history-table th {
    padding: .65rem .9rem;
    font-weight: 600;
    letter-spacing: .06em;
    text-transform: uppercase;
    font-size: .72rem;
    text-align: left;
    white-space: nowrap;
}

.history-table tbody tr {
    border-bottom: 1px solid var(--border-soft);
    transition: background .12s;
}

.history-table tbody tr:last-child { border-bottom: none; }
.history-table tbody tr:hover      { background: var(--bg); }

.history-table td {
    padding: .6rem .9rem;
    color: var(--text);
    vertical-align: middle;
}

.td-date { white-space: nowrap; }

.date-d {
    display: block;
    font-family: var(--font-data);
    font-size: .8rem;
    color: var(--text);
    font-weight: 500;
}

.date-t {
    display: block;
    font-family: var(--font-data);
    font-size: .72rem;
    color: var(--text-faint);
}

.td-ping, .td-download, .td-upload, .td-jitter, .td-server {
    font-family: var(--font-data);
    font-size: .82rem;
}

.td-download { color: var(--blue); font-weight: 600; }
.td-upload   { color: var(--blue-mid); }
.td-ping     { color: var(--text-sub); }
.td-server   { color: var(--text-faint); font-size: .75rem; }

/* ── Quality badges ───────────────────────────────────────── */
.quality-badge {
    display: inline-block;
    padding: .2rem .55rem;
    border-radius: 999px;
    font-size: .7rem;
    font-weight: 700;
    letter-spacing: .05em;
    text-transform: uppercase;
    border: 1px solid transparent;
}

.quality-excellent { background: #E6F4EE; color: #0A7C42; border-color: #B6DEC9; }
.quality-tresbien  { background: #E8F0FF; color: #003399; border-color: #B3C5F0; }
.quality-bon       { background: #EEF4FF; color: #0055CC; border-color: #C3D5F5; }
.quality-correct   { background: #FFF3E6; color: #C05800; border-color: #F0C89A; }
.quality-faible    { background: #FDEAEA; color: #B00020; border-color: #F0AAAA; }

/* ── Empty message ────────────────────────────────────────── */
.empty-msg {
    display: block;
    padding: 2.5rem;
    text-align: center;
    color: var(--text-sub);
    font-size: .88rem;
}

.empty-msg a { color: var(--blue); }

/* ── Responsive ───────────────────────────────────────────── */
@media (max-width: 720px) {
    .metrics-row   { grid-template-columns: repeat(2, 1fr); }
    .stats-summary { grid-template-columns: repeat(2, 1fr); }
    .site-header   { padding: 0 1rem; }
    .history-header { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
    .metrics-row   { grid-template-columns: repeat(2, 1fr); }
    .stats-summary { grid-template-columns: repeat(2, 1fr); }
    #speedGauge    { width: 230px; height: 230px; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { transition: none !important; animation: none !important; }
}