/* ==========================================================================
   APEX // BRAKE LAB — Calibración de pedal (calibracion.html)
   ========================================================================== */

:root {
    --bg-dark: #0a0a0d;
    --card-bg: #121217;
    --red-eva: #e60012;
    --orange-accent: #ff8c00;
    --yellow-eva: #ffc700;
    --green-eva: #10b981;
    --text-main: #f3f4f6;
    --text-muted: #a1a1aa;
    --font-head: 'Rajdhani', sans-serif;
}

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

[hidden] { display: none !important; }

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Roboto', sans-serif;
    line-height: 1.6;
    animation: pageIn 1.1s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes pageIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: none; }
}

:focus-visible { outline: 2px solid var(--yellow-eva); outline-offset: 3px; }

.accent { color: var(--red-eva); }

/* ---------- Navbar y contenedor ---------- */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.2rem 2rem;
    background-color: rgba(18, 18, 23, 0.95);
    border-bottom: 1px solid rgba(230, 0, 18, 0.5);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.7);
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(8px);
}

.logo {
    font-family: var(--font-head);
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: 2px;
    text-shadow: 0 0 8px rgba(230, 0, 18, 0.6);
}

.nav-links a {
    color: var(--text-main);
    text-decoration: none;
    font-family: var(--font-head);
    font-weight: 600;
    font-size: 1.05rem;
    text-transform: uppercase;
    transition: color 0.25s ease;
}

.nav-links a:hover {
    color: var(--yellow-eva);
    text-shadow: 0 0 10px rgba(255, 199, 0, 0.8);
}

.container { max-width: 760px; margin: 3.5rem auto; padding: 0 1rem; }

/* ---------- Botones ---------- */
.btn {
    display: inline-block;
    padding: 0.85rem 2.2rem;
    border: none;
    font-family: var(--font-head);
    font-weight: 700;
    font-size: 1.15rem;
    text-align: center;
    text-decoration: none;
    cursor: pointer;
    clip-path: polygon(12px 0, 100% 0, 100% calc(100% - 12px), calc(100% - 12px) 100%, 0 100%, 0 12px);
    transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

.btn:disabled { opacity: 0.4; cursor: not-allowed; }

.btn-primary {
    background: linear-gradient(135deg, var(--red-eva), #99000c);
    color: #fff;
    box-shadow: 0 0 18px rgba(230, 0, 18, 0.5);
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(135deg, var(--orange-accent), var(--yellow-eva));
    color: #000;
    transform: scale(1.04);
    filter: drop-shadow(0 0 14px rgba(255, 199, 0, 0.9));
}

.btn-action {
    flex: 1;
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(230, 0, 18, 0.5);
    color: var(--text-main);
}

.btn-action:hover:not(:disabled) {
    background-color: var(--red-eva);
    color: #fff;
    box-shadow: 0 0 12px rgba(230, 0, 18, 0.6);
}

.btn-group { display: flex; gap: 1rem; }

/* ---------- Cabecera y pasos ---------- */
.page-head { margin-bottom: 2rem; text-align: center; }

.page-head h1 {
    font-family: var(--font-head);
    font-size: 2.1rem;
    letter-spacing: 2px;
}

.page-head p {
    max-width: 560px;
    margin: 0.6rem auto 0;
    color: var(--text-muted);
}

.stepper {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    margin-bottom: 1.8rem;
    list-style: none;
}

.step {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.4rem;
    font-family: var(--font-head);
    font-size: 0.85rem;
    letter-spacing: 1px;
    color: var(--text-muted);
    text-align: center;
}

.step::before {
    content: '';
    position: absolute;
    top: 17px;
    left: -50%;
    width: 100%;
    height: 2px;
    background-color: rgba(255, 255, 255, 0.15);
}

.step:first-child::before { display: none; }

.step-dot {
    position: relative;
    z-index: 1;
    display: grid;
    place-items: center;
    width: 36px;
    height: 36px;
    background-color: var(--bg-dark);
    border: 2px solid rgba(255, 255, 255, 0.25);
    border-radius: 50%;
    font-size: 1rem;
    font-weight: 700;
    transition: all 0.3s ease;
}

.step.done::before,
.step.current::before { background-color: var(--green-eva); }

.step.done .step-dot {
    background-color: var(--green-eva);
    border-color: var(--green-eva);
    font-size: 0;
}

.step.done .step-dot::after {
    content: '✔';
    font-size: 1rem;
    color: #04130d;
}

.step.current { color: var(--text-main); }

.step.current .step-dot {
    border-color: var(--yellow-eva);
    color: var(--yellow-eva);
    box-shadow: 0 0 12px rgba(255, 199, 0, 0.5);
}

/* ---------- Panel principal ---------- */
.cal-panel {
    padding: 2rem;
    background-color: var(--card-bg);
    border: 1px solid var(--red-eva);
    clip-path: polygon(0 0, calc(100% - 20px) 0, 100% 20px, 100% 100%, 20px 100%, 0 calc(100% - 20px));
}

.cal-label {
    font-family: var(--font-head);
    font-size: 0.9rem;
    letter-spacing: 1px;
    color: var(--text-muted);
}

.device-row {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.8rem;
    margin-bottom: 1.4rem;
}

.cal-select {
    flex: 1;
    min-width: 180px;
    padding: 0.55rem 0.8rem;
    background-color: #08080a;
    color: var(--text-main);
    border: 1px solid rgba(255, 255, 255, 0.2);
    font-family: var(--font-head);
    font-size: 1rem;
}

.cal-select:disabled { opacity: 0.6; }

.badge {
    padding: 0.3rem 0.8rem;
    border-radius: 2px;
    font-family: var(--font-head);
    font-size: 0.85rem;
    letter-spacing: 1px;
    white-space: nowrap;
}

.badge-off { color: var(--red-eva); border: 1px dashed var(--red-eva); background-color: rgba(230, 0, 18, 0.12); }
.badge-ok { color: var(--green-eva); border: 1px solid var(--green-eva); background-color: rgba(16, 185, 129, 0.12); }
.badge-warn { color: var(--yellow-eva); border: 1px dashed var(--yellow-eva); background-color: rgba(255, 199, 0, 0.1); }

.guide {
    --tone: var(--yellow-eva);
    display: flex;
    align-items: center;
    gap: 1.2rem;
    margin-bottom: 1rem;
    padding: 1.2rem;
    background-color: rgba(0, 0, 0, 0.4);
    border-left: 4px solid var(--tone);
}

.guide.ok { --tone: var(--green-eva); }
.guide.error { --tone: var(--red-eva); }

.guide-icon {
    flex: none;
    display: grid;
    place-items: center;
    width: 52px;
    height: 52px;
    border: 2px solid var(--tone);
    border-radius: 50%;
    font-family: var(--font-head);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--tone);
}

.guide h2 {
    margin-bottom: 0.2rem;
    font-family: var(--font-head);
    font-size: 1.5rem;
    line-height: 1.2;
}

.guide p {
    min-height: 3em;
    color: var(--text-muted);
    font-size: 0.98rem;
    line-height: 1.5;
}

.progress {
    height: 10px;
    margin-bottom: 1.6rem;
    overflow: hidden;
    background-color: #08080a;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.progress-fill { width: 0; height: 100%; background-color: var(--yellow-eva); }

.meter { margin-bottom: 1.6rem; }

.meter-head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 0.4rem;
}

.meter-value {
    font-family: var(--font-head);
    font-size: 1.8rem;
    line-height: 1;
}

.meter-bar {
    position: relative;
    height: 34px;
    overflow: hidden;
    background-color: #08080a;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.meter-fill { position: relative; z-index: 1; width: 0; height: 100%; background-color: var(--red-eva); }

.meter-bar i {
    position: absolute;
    top: 0;
    bottom: 0;
    z-index: 2;
    width: 1px;
    background-color: rgba(255, 255, 255, 0.25);
}

.meter-scale {
    display: flex;
    justify-content: space-between;
    margin-top: 0.2rem;
    font-family: var(--font-head);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.panel-actions { text-align: center; }

.next-steps {
    margin-top: 1.6rem;
    padding-top: 1.2rem;
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.next-steps .cal-label { display: block; margin-bottom: 0.8rem; }
.next-steps .btn-group { flex-wrap: wrap; }
.next-steps .btn { padding: 0.85rem 1rem; font-size: 1.05rem; }

/* ---------- Opciones avanzadas ---------- */
.advanced {
    margin-top: 1.5rem;
    padding: 0.8rem 1.2rem;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.advanced summary {
    cursor: pointer;
    font-family: var(--font-head);
    letter-spacing: 1px;
    color: var(--text-muted);
}

.advanced-hint { margin: 0.8rem 0; font-size: 0.88rem; color: var(--text-muted); }

.channels { max-height: 240px; margin-bottom: 1rem; overflow-y: auto; }

.channel {
    display: grid;
    grid-template-columns: 80px 1fr auto;
    align-items: center;
    gap: 0.8rem;
    padding: 0.35rem 0.4rem;
    border-left: 3px solid transparent;
}

.channel.selected { border-left-color: var(--yellow-eva); background-color: rgba(255, 199, 0, 0.06); }

.channel-name { font-family: var(--font-head); font-size: 0.9rem; }

.channel-bar {
    height: 8px;
    overflow: hidden;
    background-color: #08080a;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

.channel-fill { width: 0; height: 100%; background-color: var(--red-eva); }

.channel-btn {
    padding: 0.25rem 0.6rem;
    background: transparent;
    border: 1px solid rgba(230, 0, 18, 0.5);
    color: var(--text-main);
    font-family: var(--font-head);
    font-size: 0.75rem;
    letter-spacing: 1px;
    cursor: pointer;
}

.channel-btn:hover { background-color: var(--red-eva); }

.advanced .btn-action { width: 100%; padding: 0.6rem 1.4rem; font-size: 1rem; }

/* ---------- Footer ---------- */
.footer {
    margin-top: 2rem;
    background-color: #08080b;
    border-top: 1px solid rgba(230, 0, 18, 0.5);
    color: var(--text-muted);
    font-size: 0.92rem;
}

.footer-inner {
    display: grid;
    grid-template-columns: 1.6fr 1fr 1.3fr 1.2fr;
    gap: 2.5rem;
    max-width: 1000px;
    margin: 0 auto;
    padding: 3rem 1.5rem 2rem;
}

.footer-logo {
    margin-bottom: 0.8rem;
    font-size: 1.3rem;
    color: var(--text-main);
}

.footer-brand p {
    max-width: 34ch;
    line-height: 1.6;
}

.footer-col h4 {
    margin-bottom: 0.9rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    font-family: var(--font-head);
    font-size: 0.95rem;
    letter-spacing: 2px;
    text-transform: uppercase;
    color: var(--text-main);
}

.footer-col ul { list-style: none; }
.footer-col li { margin-bottom: 0.5rem; }

.footer-col a {
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.2s ease;
}

.footer-col a:hover { color: var(--yellow-eva); }

.footer-bottom { border-top: 1px solid rgba(255, 255, 255, 0.08); }

.footer-bottom-inner {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 0.4rem 1rem;
    max-width: 1000px;
    margin: 0 auto;
    padding: 1.1rem 1.5rem;
    font-size: 0.85rem;
}

@media (max-width: 860px) {
    .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 520px) {
    .footer-inner { grid-template-columns: 1fr; gap: 1.8rem; padding-top: 2rem; }
    .footer-bottom-inner { flex-direction: column; text-align: center; }
}

/* ---------- Móvil y accesibilidad ---------- */
@media (max-width: 640px) {
    .navbar { padding: 1rem; }
    .logo { font-size: 1.25rem; }
    .container { margin: 2rem auto; }
    .page-head h1 { font-size: 1.6rem; }
    .step { font-size: 0.7rem; }
    .cal-panel { padding: 1.2rem; }
    .guide { flex-direction: column; align-items: flex-start; gap: 0.8rem; }
    .btn-group { flex-direction: column; }
    .btn { padding: 0.8rem 1.4rem; }
}

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