/* ============================================
   Token system — Urología del Valle
   Light / dark, semantic roles, verified contrast
   ============================================ */

:root {
  --surface: #FFFFFF;
  --surface-elevated: #F5F9F9;
  --surface-muted: #EDF4F4;
  --content: #0E1B23;
  --content-secondary: #4A5A63;          /* 7.16:1 on white */
  --accent: #005196;                       /* brand blue, text/icon 8.02:1 */
  --accent-strong: #003A6E;                /* link/hover, white 11.47:1 */
  --accent-solid: #005196;                 /* filled button bg, white 8.02:1 */
  --accent-solid-hover: #003A6E;
  --accent-surface: #E6F8FC;
  --accent-cyan: #007F99;                  /* legible cyan, white text 4.67:1 */
  --cyan: #00bed5;                         /* decorative only in light */
  --border: #D8E2E2;
  --focus: #005196;
  --error: #C62828;                        /* 5.62:1 on surface */

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 22px;

  --font: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
          "Helvetica Neue", Arial, "Noto Sans", sans-serif;

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 40px;
  --space-5: 64px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --surface: #10171C;
    --surface-elevated: #161F25;
    --surface-muted: #1A2329;
    --content: #E6F0EE;                    /* 15.55:1 on surface */
    --content-secondary: #9FB3B8;          /* 8.28:1 on surface */
    --accent: #00bed5;                     /* brand cyan, text 8.03:1 */
    --accent-strong: #00bed5;
    --accent-solid: #005196;               /* filled btn bg, white 8.02:1 */
    --accent-solid-hover: #0078D4;         /* white 4.53:1 */
    --accent-surface: #0E2733;             /* content 13.31:1, cyan 6.87:1 */
    --accent-cyan: #00bed5;
    --cyan: #00bed5;
    --border: #2A363C;
    --focus: #00bed5;
    --error: #FF9A8F;                       /* 8.17:1 on elevated surface */
  }
}

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

*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: var(--font);
  font-size: 1.0625rem;                          /* mobile default */
  line-height: 1.55;
  color: var(--content);
  background: var(--surface);
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

h1, h2, h3, p { margin: 0; }

img, svg { display: block; max-width: 100%; }

a { color: var(--accent-strong); }

::selection { background: var(--accent-surface); }

.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;
  top: -48px; left: var(--space-2);
  z-index: 100;
  padding: 10px 16px;
  background: var(--accent-solid);
  color: #fff;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  text-decoration: none;
  font-weight: 600;
  transition: top 160ms ease;
}

.skip-link:focus { top: 0; }

:focus-visible {
  outline: 3px solid var(--focus);
  outline-offset: 2px;
  border-radius: var(--radius-sm);
}

.container {
  width: min(1080px, 100% - var(--space-4));
  margin-inline: auto;
}

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

.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: transparent;
  transition: background 200ms ease, box-shadow 200ms ease;
}

.site-header.is-scrolled {
  background: color-mix(in srgb, var(--surface) 86%, transparent);
  backdrop-filter: saturate(160%) blur(14px);
  -webkit-backdrop-filter: saturate(160%) blur(14px);
  box-shadow: 0 1px 0 var(--border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  min-height: 68px;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--content);
}

.brand-mark { flex: none; height: 44px; width: auto; object-fit: contain; }

.brand-name {
  font-size: 1.0625rem;
  font-weight: 400;
  letter-spacing: -0.01em;
}

.brand-name strong { font-weight: 700; }

.main-nav {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}

.main-nav a {
  color: var(--content-secondary);
  text-decoration: none;
  font-weight: 500;
  padding: var(--space-1) 4px;
  border-radius: var(--radius-sm);
}

.main-nav a:hover { color: var(--content); }

.nav-cta {
  color: #fff !important;
  background: var(--accent-solid);
  padding: 10px 18px !important;
  border-radius: 999px !important;
  font-weight: 600 !important;
}

.nav-cta:hover {
  background: var(--accent-solid-hover);
  color: #fff !important;
}

.nav-btn-secondary {
  color: var(--accent-strong) !important;
  background: var(--accent-surface);
  padding: 10px 18px !important;
  border: 1px solid transparent;
  border-radius: 999px !important;
  font-weight: 600 !important;
  transition: border-color 160ms ease, background 160ms ease;
}

.nav-btn-secondary:hover {
  border-color: var(--accent-strong);
  color: var(--accent-strong) !important;
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: 0;
  padding: 10px;
  cursor: pointer;
  border-radius: var(--radius-sm);
}

.menu-toggle .bar {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--content);
  border-radius: 2px;
  transition: transform 200ms ease, opacity 200ms ease;
}

.menu-toggle[aria-expanded="true"] .bar:nth-child(2) { transform: rotate(45deg) translateY(7px); }
.menu-toggle[aria-expanded="true"] .bar:nth-child(3) { transform: rotate(-45deg) translateY(-7px); }
.menu-toggle[aria-expanded="true"] .bar:first-child { opacity: 0; }

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

.hero {
  position: relative;
  overflow: hidden;
  padding: var(--space-5) 0 var(--space-5);
  background:
    radial-gradient(1100px 520px at 85% -10%, var(--accent-surface), transparent 60%), radial-gradient(700px 380px at 10% 20%, color-mix(in srgb, var(--cyan) 22%, transparent), transparent 70%),
    var(--surface);
}

.hero-contours {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  color: color-mix(in srgb, var(--accent) 12%, transparent);
  pointer-events: none;
}

.hero-inner {
  position: relative;
  display: grid;
  grid-template-columns: 1fr minmax(0, 440px);
  gap: var(--space-5);
  align-items: center;
}

.hero-content { max-width: 640px; }

.hero-media { position: relative; }

.hero-img {
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 4;
  object-fit: cover;
  border-radius: var(--radius-lg);
  box-shadow: 0 24px 60px -24px color-mix(in srgb, var(--accent) 45%, transparent);
}

@media (max-width: 1000px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: var(--space-4);
    text-align: center;
  }
  .hero-actions, .hero-facts { justify-content: center; }
  .hero-content, .hero-sub { margin-inline: auto; }
  .hero-img { max-width: 420px; margin-inline: auto; aspect-ratio: 3 / 4; }
}

@media (max-width: 900px) {
  .hero-inner { margin-inline: auto; }
}

.eyebrow {
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: var(--space-2);
}

.hero-title {
  font-size: clamp(2.125rem, 5.5vw, 3.5rem);
  line-height: 1.08;
  letter-spacing: -0.02em;
  font-weight: 700;
  margin-bottom: var(--space-3);
}

.hero-title span { color: var(--accent); }

.hero-sub {
  font-size: 1.1875rem;
  color: var(--content-secondary);
  max-width: 60ch;
  margin-bottom: var(--space-4);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-5);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;                          /* ≥44 control target */
  padding: 13px 24px;
  border-radius: 999px;
  font-size: 1.0625rem;
  font-weight: 600;
  text-decoration: none;
  border: 1px solid transparent;
  cursor: pointer;
  transition: background 160ms ease, border-color 160ms ease, transform 120ms ease;
}

.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--accent-solid);
  color: #fff;
}

.btn-primary:hover { background: var(--accent-solid-hover); }

.btn-secondary {
  background: var(--accent-surface);
  color: var(--accent-strong);
}

.btn-secondary:hover {
  border-color: var(--accent-strong);
  background: color-mix(in srgb, var(--accent-surface) 70%, white);
}

.btn-block { width: 100%; }

.hero-facts {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin: 0;
}

.hero-facts div { display: flex; flex-direction: column; gap: 2px; }

.fact-num { font-size: 1.5rem; font-weight: 700; letter-spacing: -0.01em; }

.fact-label { color: var(--content-secondary); font-size: 0.9375rem; }

/* ============================================
   Sections
   ============================================ */

.nosotros { padding: var(--space-5) 0; background: var(--surface-elevated); }

.contacto { padding: var(--space-5) 0; background: var(--surface); }

.section-title {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  line-height: 1.12;
  letter-spacing: -0.02em;
  font-weight: 700;
  margin-bottom: var(--space-2);
}

.section-lead {
  color: var(--content-secondary);
  font-size: 1.125rem;
  max-width: 62ch;
  margin-bottom: var(--space-4);
}

/* Cards */

.nosotros-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
  margin-bottom: var(--space-5);
}

@media (max-width: 900px) {
  .nosotros-grid { grid-template-columns: 1fr; }
}

.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
}

.card-icon { color: var(--accent); margin-bottom: var(--space-2); }

.card h3 {
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-1);
}

.card p { color: var(--content-secondary); }

/* Sedes */

.sedes h3 { font-size: 1.25rem; margin-bottom: var(--space-2); }

.sedes-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-2);
}

@media (max-width: 700px) {
  .sedes-list { grid-template-columns: 1fr; }
}

.sedes-list li {
  display: flex;
  flex-direction: column;
  gap: 2px;
  background: var(--accent-surface);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-3);
}

.sedes-list span { color: var(--content-secondary); }

/* ============================================
   Contacto
   ============================================ */

.contacto-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  align-items: start;
}

@media (max-width: 800px) {
  .contacto-grid { grid-template-columns: 1fr; }
}

.contacto-ways { display: flex; flex-direction: column; gap: var(--space-2); }

.contact-item {
  display: flex;
  flex-direction: column;
  gap: 2px;
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-md);
  border: 1px solid var(--border);
  text-decoration: none;
  color: var(--content);
  transition: border-color 160ms ease, background 160ms ease;
}

.contact-item:hover { border-color: var(--accent); background: var(--accent-surface); }

.contact-line { font-size: 0.875rem; color: var(--content-secondary); }

.contact-value { font-size: 1.1875rem; font-weight: 600; }

/* Form */

.appt-form {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
}

.field { display: flex; flex-direction: column; gap: 6px; }

.field label { font-weight: 600; font-size: 0.9375rem; }

.field input,
.field textarea {
  font: inherit;
  font-size: 1.0625rem;
  color: var(--content);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  min-height: 48px;
  transition: border-color 160ms ease, box-shadow 160ms ease;
}

.field textarea { resize: vertical; min-height: 88px; }

.field input:hover,
.field textarea:hover { border-color: var(--accent); }

.field input:focus,
.field textarea:focus {
  outline: none;
  border-color: var(--focus);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--focus) 25%, transparent);
}

.field-error {
  font-size: 0.875rem;
  color: var(--error);
  min-height: 0;
}

.field.has-error input,
.field.has-error textarea {
  border-color: var(--error);
}

.form-note { font-size: 0.875rem; color: var(--content-secondary); margin: 4px 0 0; }

/* ============================================
   Equipo y tecnología
   ============================================ */

.equipo { padding: var(--space-5) 0; background: var(--surface-elevated); }

.equipo-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-auto-rows: 260px;
  gap: var(--space-3);
}

.photo-wide { grid-column: span 2; }

.photo-card {
  position: relative;
  overflow: hidden;
  border-radius: var(--radius-lg);
  margin: 0;
  background: var(--surface-muted);
}

.photo {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 320ms ease;
}

.photo-card:hover .photo { transform: scale(1.03); }

.photo-card figcaption {
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  padding: var(--space-4) var(--space-3) var(--space-2);
  color: #fff;
  font-size: 0.9375rem;
  font-weight: 600;
  line-height: 1.3;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.78), rgba(0, 0, 0, 0.25) 60%, transparent);
}

@media (max-width: 800px) {
  .equipo-grid {
    grid-template-columns: 1fr;
    grid-auto-rows: auto;
  }
  .photo-wide { grid-column: span 1; }
  .photo-card { aspect-ratio: 16 / 10; }
  .photo { position: absolute; inset: 0; width: 100%; height: 100%; }
}

@media (prefers-reduced-motion: reduce) {
  .photo-card:hover .photo { transform: none; }
}

/* ============================================
   Ubicación (mapas)
   ============================================ */

.ubicacion { margin-top: var(--space-5); }

.ubicacion-title {
  font-size: 1.25rem;
  letter-spacing: -0.01em;
  margin-bottom: var(--space-3);
}

.map-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-3);
}

@media (max-width: 800px) {
  .map-grid { grid-template-columns: 1fr; }
}

.map-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  background: var(--surface-elevated);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
}

.map-card h4 {
  font-size: 1.125rem;
  letter-spacing: -0.01em;
}

.map-address { color: var(--content-secondary); }

.map-frame {
  width: 100%;
  border: 0;
  border-radius: var(--radius-md);
  aspect-ratio: 4 / 3;
  min-height: 220px;
  background: var(--surface-muted);
}

.btn-map { align-self: flex-start; }

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

.site-footer {
  border-top: 1px solid var(--border);
  background: var(--surface-elevated);
  padding: var(--space-4) 0;
}

.footer-inner {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  justify-content: space-between;
  color: var(--content-secondary);
  font-size: 0.9375rem;
}

/* ============================================
   Motion
   ============================================ */

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

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

@media (max-width: 900px) {
  .main-nav { display: none; }
  .menu-toggle { display: flex; }

  .hero { padding: var(--space-4) 0; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }
}

.mobile-menu { background: var(--surface); }

.mobile-menu[hidden] { display: none; }

.mobile-menu {
  position: sticky;
  top: 68px;
  z-index: 49;
  border-bottom: 1px solid var(--border);
  padding: var(--space-2) 0 var(--space-3);
}

.mobile-nav { display: flex; flex-direction: column; gap: 4px; }

.mobile-nav a {
  padding: 14px var(--space-4);
  text-decoration: none;
  color: var(--content);
  font-weight: 500;
  font-size: 1.125rem;
  border-radius: var(--radius-sm);
}

.mobile-nav a:hover { background: var(--accent-surface); }

.mobile-nav .nav-cta,
.mobile-nav .nav-btn-secondary {
  margin: var(--space-2) var(--space-4) 0;
  text-align: center;
}