/* ═══════════════════════════════════════════
   RUTH.ia — registro.css
   Misma estética que ruth.html / "Personas Naturales":
   colores dorados, rfont, modo oscuro por defecto,
   con toggle a modo claro.
═══════════════════════════════════════════ */

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

:root {
  /* ===== Paleta RUTH.ia — idéntica a ruth.html (modo oscuro, predeterminado) ===== */
  --bg:#0C0E0F; --bg-2:#17191C; --bg-3:#22262A; --footer-bg:#07080A;
  --gold:#FFEDA8; --gold-bright:#FFF6D9; --gold-rgb:255,237,168;
  --gold-ink:var(--gold-bright); --gold-border:var(--gold); --gold-line-rgb:255,237,168;
  --text-1:#FFFFFF; --text-1-rgb:255,255,255; --text-2:rgba(255,255,255,.80); --text-3:rgba(255,255,255,.56);
  --border-c:rgba(255,255,255,.09); --border-strong:rgba(255,255,255,.16);
  --auth-card-bg:rgba(12,10,8,.75);
  --modal-bg:rgba(14,16,20,.97);
  --dark-text:#080a0c;
  --ambient-rgb:255,237,168; --ambient-dot-op:.45; --ambient-line-op:.2; --ambient-r:1;

  /* Alias hacia los nombres que ya usaba este archivo, para no reescribir cada regla */
  --bg-dark: var(--bg);
  --bg-card: var(--bg-2);
  --accent:  var(--gold-border);
  --accent2: var(--gold-ink);
  --text:    var(--text-1);
  --muted:   var(--text-3);
  --border:  var(--border-c);
  --error:   #f87171;
  --success: #4ade80;
}

:root[data-theme="light"] {
  /* ===== Paleta RUTH.ia — modo claro, idéntica a ruth.html ===== */
  --bg:#FFFFFF; --bg-2:#F7F5EF; --bg-3:#EFEBE1; --footer-bg:#EFEAE0;
  --gold-ink:#8A6B1F; --gold-border:#B8860B; --gold-line-rgb:120,90,20;
  --text-1:#14171A; --text-1-rgb:20,23,26; --text-2:rgba(20,23,26,.80); --text-3:rgba(20,23,26,.58);
  --border-c:rgba(20,23,26,.10); --border-strong:rgba(20,23,26,.18);
  --auth-card-bg:rgba(255,255,255,.82);
  --modal-bg:#FFFFFF;
  /* dorado pálido casi no se ve sobre blanco: aquí se sube opacidad, tamaño y se satura el color */
  --ambient-rgb:90,62,10; --ambient-dot-op:.8; --ambient-line-op:.3; --ambient-r:1.7;
}

@font-face {
  font-family: rfont;
  src: url("../fonts/Brother-1816-Regular.ttf");
  font-display: swap;
}
@font-face {
  font-family: rfont2;
  src: url("../fonts/AbrilFatface-Regular.ttf");
  font-display: swap;
}

html { scroll-behavior: smooth; }

body {
  font-family: rfont, sans-serif;
  background: var(--bg-dark);
  color: var(--text);
  overflow-x: hidden;
  min-height: 100vh;
  transition: background .3s, color .3s;
}

/* ─── CANVAS ─── */
#network-canvas {
  position: fixed; inset: 0; z-index: 0;
  width: 100%; height: 100%;
  opacity: .8; pointer-events: none;
}

/* ─── NAV ─── */
nav {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 56px;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-c);
}

.nav-logo-img { width: 130px; height: auto; }
:root[data-theme="light"] .nav-logo-img,
:root[data-theme="light"] .auth-brand-img { filter: invert(1) brightness(1.15); }

.nav-right { display: flex; align-items: center; gap: 14px; }

.btn-back {
  font-family: rfont; font-weight: 700;
  font-size: .72rem; letter-spacing: .14em; text-transform: uppercase;
  padding: 9px 20px;
  border: 1.5px solid rgba(var(--gold-line-rgb),.3);
  color: var(--text-2);
  background: transparent; cursor: pointer;
  transition: all .25s;
}
.btn-back:hover {
  border-color: var(--accent);
  color: var(--gold-ink);
}

/* ─── TOGGLE DE TEMA — idéntico al de ruth.html ─── */
.theme-toggle {
  position: relative; width: 52px; height: 28px; border-radius: 100px;
  border: 1px solid var(--border-strong); background: var(--bg-3);
  cursor: pointer; display: inline-flex; align-items: center; justify-content: space-between;
  padding: 0 6px; flex-shrink: 0; transition: .2s;
}
.theme-toggle:hover { border-color: var(--gold-ink); }
.theme-toggle svg { width: 13px; height: 13px; position: relative; z-index: 1; transition: .2s; }
.theme-toggle .tt-sun { stroke: var(--text-3); }
.theme-toggle .tt-moon { stroke: var(--gold-ink); }
.theme-toggle .tt-thumb {
  position: absolute; top: 2px; left: 2px; width: 22px; height: 22px; border-radius: 50%;
  background: linear-gradient(135deg, var(--gold), var(--gold-bright));
  transition: transform .3s cubic-bezier(.2,.8,.2,1);
}
.theme-toggle.is-light .tt-thumb { transform: translateX(24px); }
.theme-toggle.is-light .tt-sun { stroke: var(--gold-ink); }
.theme-toggle.is-light .tt-moon { stroke: var(--text-3); }

/* ─── WRAP ─── */
.auth-wrap {
  position: relative; z-index: 1;
  min-height: 100svh;
  display: flex; align-items: center; justify-content: center;
  padding: 110px 20px 60px;
}

/* ─── CARD ─── */
.auth-card {
  width: 100%; max-width: 500px;
  background: var(--auth-card-bg);
  border: 1px solid rgba(var(--gold-line-rgb),.15);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 48px 44px 40px;
  animation: slideUp .6s cubic-bezier(.22,1,.36,1) both;
  transition: background .3s, border-color .3s;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── BRAND ─── */
.auth-brand { text-align: center; margin-bottom: 6px; }
.auth-brand-img { width: 200px; height: auto; margin: 0 auto; display: block; }

.auth-tagline {
  font-family: rfont;
  font-size: .65rem; letter-spacing: .22em; text-transform: uppercase;
  color: var(--text-3);
  text-align: center; margin-bottom: 24px;
}

.auth-title {
  font-family: rfont;
  font-size: .75rem; font-weight: 700; letter-spacing: .2em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 28px; padding-bottom: 14px;
  border-bottom: 1px solid rgba(var(--gold-line-rgb),.12);
}

/* ─── FIELDS ─── */
.field-group { display: flex; flex-direction: column; gap: 28px; }

.fields-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }

.field { position: relative; }

.field input {
  width: 100%;
  padding: 12px 40px 12px 0;
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(var(--gold-line-rgb),.2);
  color: var(--text);
  font-family: rfont; font-size: .9rem;
  outline: none;
  transition: border-color .3s;
}
.field input:focus { border-bottom-color: var(--accent); }

.field label {
  position: absolute; top: 12px; left: 0;
  color: var(--muted);
  font-family: rfont; font-size: .85rem;
  pointer-events: none; transition: all .25s;
  letter-spacing: .04em;
}
.field input:focus ~ label,
.field input:not(:placeholder-shown) ~ label {
  top: -14px; font-size: .65rem;
  color: var(--gold-ink); letter-spacing: .16em;
  text-transform: uppercase;
}

.field-line {
  position: absolute; bottom: 0; left: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width .3s;
}
.field input:focus ~ .field-line { width: 100%; }

.eye-btn {
  position: absolute; right: 0; top: 50%; transform: translateY(-50%);
  background: none; border: none; cursor: pointer;
  font-size: .95rem; color: var(--muted);
  padding: 4px; transition: color .2s;
}
.eye-btn:hover { color: var(--gold-ink); }

/* ─── PASSWORD STRENGTH ─── */
#pwdStrength {
  height: 3px;
  background: rgba(var(--gold-line-rgb),.1);
  margin-top: -20px;
  overflow: hidden;
}
#pwdStrengthBar {
  height: 100%;
  width: 0;
  transition: width .3s, background .3s;
}

/* ─── TERMS ─── */
.terms-row {
  display: flex; align-items: flex-start; gap: 10px;
  margin-top: 8px;
  font-family: rfont; font-size: .78rem;
  color: var(--text-3); line-height: 1.6;
}
.terms-row input[type="checkbox"] {
  margin-top: 3px; flex-shrink: 0;
  accent-color: var(--accent); cursor: pointer;
}
.terms-row label { cursor: pointer; }
.link-like {
  color: var(--gold-ink); cursor: pointer;
  text-decoration: underline; text-underline-offset: 3px;
}

/* ─── BUTTON ─── */
.btn-auth {
  width: 100%; margin-top: 28px;
  padding: 14px;
  background: var(--accent);
  color: var(--dark-text);
  border: none;
  font-family: rfont; font-weight: 700;
  font-size: .78rem; letter-spacing: .18em; text-transform: uppercase;
  cursor: pointer;
  transition: opacity .25s, transform .25s;
}
.btn-auth:hover { opacity: .85; transform: translateY(-2px); }
.btn-auth:active { transform: translateY(0); }
.btn-auth:disabled { opacity: .4; cursor: not-allowed; transform: none; }

/* ─── DIVIDER ─── */
.divider-line {
  display: flex; align-items: center; gap: 12px;
  margin: 24px 0 18px;
  color: var(--text-3); font-size: .75rem;
  font-family: rfont; letter-spacing: .1em;
}
.divider-line::before, .divider-line::after {
  content: ''; flex: 1; height: 1px;
  background: rgba(var(--gold-line-rgb),.12);
}

/* ─── ALT LINK ─── */
.auth-alt {
  text-align: center;
  font-family: rfont; font-size: .78rem;
  letter-spacing: .06em; color: var(--muted);
}
.auth-alt a {
  color: var(--gold-ink); text-decoration: none; font-weight: 700;
}
.auth-alt a:hover { text-decoration: underline; }

/* ─── MESSAGES ─── */
.auth-msg {
  padding: 10px 14px;
  font-family: rfont; font-size: .78rem;
  letter-spacing: .06em; margin-bottom: 16px;
  border-left: 2px solid;
}
.auth-msg.error {
  background: rgba(248,113,113,.07);
  color: var(--error);
  border-color: var(--error);
}
.auth-msg.info {
  background: rgba(var(--gold-line-rgb),.07);
  color: var(--accent2);
  border-color: var(--accent);
}

/* ─── MODAL ─── */
.modal-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(8,10,12,.8);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  display: flex; align-items: center; justify-content: center;
}
.modal-overlay.hidden { display: none !important; }

.modal-card {
  background: var(--modal-bg);
  border: 1px solid rgba(var(--gold-line-rgb),.2);
  padding: 44px 36px 36px;
  max-width: 380px; width: 90%;
  text-align: center;
  animation: slideUp .35s cubic-bezier(.22,1,.36,1);
}
.modal-card h3 {
  font-family: rfont;
  font-size: 1.2rem; letter-spacing: .16em;
  text-transform: uppercase;
  color: var(--text); margin-bottom: 10px;
}
.modal-card p {
  font-family: rfont; font-size: .82rem;
  line-height: 1.7; color: var(--muted);
}

/* ─── SUCCESS ICON ─── */
.success-icon {
  width: 56px; height: 56px;
  border: 1px solid rgba(var(--gold-line-rgb),.35);
  color: var(--gold-ink);
  font-size: 1.6rem;
  display: flex; align-items: center; justify-content: center;
  margin: 0 auto 20px;
  animation: pop .4s cubic-bezier(.22,1,.36,1);
}
@keyframes pop {
  from { transform: scale(0); opacity: 0; }
  to   { transform: scale(1); opacity: 1; }
}

/* ─── RESPONSIVE ─── */
@media (max-width: 600px) {
  nav { padding: 14px 20px; }
  .auth-card { padding: 32px 22px 28px; }
  .fields-row { grid-template-columns: 1fr; gap: 28px; }
}

@media (max-width: 400px) {
  .auth-brand-img { width: 160px; }
  .auth-card { padding: 28px 16px 24px; }
}

@supports (padding: max(0px)) {
  .auth-wrap {
    padding-left: max(20px, env(safe-area-inset-left));
    padding-right: max(20px, env(safe-area-inset-right));
    padding-bottom: max(60px, env(safe-area-inset-bottom));
  }
}

/* ════════════════════════════════════════════
   RESPONSIVE — solo breakpoints adicionales
   El código y lógica no fueron tocados
════════════════════════════════════════════ */

/* ── Tablet (≤ 960px) ── */
@media (max-width: 960px) {
  nav { padding: 14px 28px; }
  .nav-logo-img { width: 110px; }
  .auth-card { max-width: 480px; }
}

/* ── Móvil (≤ 600px) ── */
@media (max-width: 600px) {
  nav { padding: 14px 18px; }
  .nav-logo-img { width: 100px; }
  .btn-back { font-size: .65rem; padding: 8px 14px; }
  .theme-toggle { width: 46px; height: 25px; }
  .theme-toggle .tt-thumb { width: 19px; height: 19px; }
  .theme-toggle.is-light .tt-thumb { transform: translateX(21px); }

  .auth-wrap { padding: 90px 14px 48px; }
  .auth-card { padding: 28px 18px 24px; max-width: 100%; }
  .auth-brand-img { width: 160px; }
  .auth-tagline { font-size: .6rem; letter-spacing: .18em; }

  /* Fila de campos → columna */
  .fields-row { grid-template-columns: 1fr; gap: 28px; }

  .field input { font-size: .85rem; }
  .btn-auth { font-size: .72rem; padding: 13px; }

  /* Modal de éxito */
  .modal-card { padding: 32px 22px 28px; }
  .success-icon { width: 48px; height: 48px; font-size: 1.3rem; }
}

/* ── Móvil pequeño (≤ 400px) ── */
@media (max-width: 400px) {
  .auth-card { padding: 24px 14px 20px; }
  .auth-brand-img { width: 140px; }
}

/* ── TV / pantalla grande (≥ 1920px) ── */
@media (min-width: 1920px) {
  nav { padding: 20px 120px; }
  .auth-card { max-width: 580px; padding: 60px 56px 50px; }
  .auth-brand-img { width: 260px; }
}

/* ── Safe area (iPhone notch) ── */
@supports (padding: max(0px)) {
  .auth-wrap {
    padding-left: max(20px, env(safe-area-inset-left));
    padding-right: max(20px, env(safe-area-inset-right));
    padding-bottom: max(48px, env(safe-area-inset-bottom));
  }
}