/**
 * SGC Trazabilidad
 * 🔗 Documento: docs/Login Page.md
 * 📦 Dependencias: Google Fonts (Outfit, Inter)
 * 🔄 Consumido por: login.html, reset-password.html
 */

/* ═══════════════════════════════════════════════════════
   LOGIN PAGE — INDUSTRYTEC SAS
   Tema corporativo azul acero + glassmorphism
═══════════════════════════════════════════════════════ */

/* ── Variables de login ──────────────────────────────── */
:root {
  --login-primary:    #2563eb;
  --login-primary-dk: #1d4ed8;
  --login-primary-lt: rgba(37,99,235,.10);
  --login-bg:         #f0f4fa;
  --login-card:       rgba(255,255,255,.82);
  --login-border:     rgba(37,99,235,.12);
  --login-text:       #0f172a;
  --login-text-2:     #475569;
  --login-text-3:     #94a3b8;
  --login-shadow:     0 20px 60px -12px rgba(15,23,42,.12);
  --login-radius:     22px;
  --login-transition: .3s cubic-bezier(.4,0,.2,1);
}

/* ── Body del login ──────────────────────────────────── */
.login-body {
  margin: 0;
  padding: 0;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Outfit', 'Inter', system-ui, sans-serif;
  color: var(--login-text);
  background: var(--login-bg);
  background-image:
    radial-gradient(ellipse 60% 50% at 20% 20%, rgba(37,99,235,.06) 0%, transparent 60%),
    radial-gradient(ellipse 50% 60% at 80% 80%, rgba(225,29,72,.04) 0%, transparent 60%);
  position: relative;
  overflow: hidden;
}

/* ── Grid decorativa de fondo ────────────────────────── */
.login-bg-grid {
  position: fixed;
  inset: 0;
  background-image:
    linear-gradient(rgba(37,99,235,.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37,99,235,.03) 1px, transparent 1px);
  background-size: 44px 44px;
  pointer-events: none;
  z-index: 0;
}

/* ── Orbes flotantes de fondo ────────────────────────── */
.login-orb {
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  pointer-events: none;
  z-index: 0;
}
.login-orb--1 {
  width: 400px;
  height: 400px;
  background: rgba(37,99,235,.08);
  top: -100px;
  right: -80px;
  animation: orbFloat 12s ease-in-out infinite;
}
.login-orb--2 {
  width: 300px;
  height: 300px;
  background: rgba(225,29,72,.05);
  bottom: -60px;
  left: -60px;
  animation: orbFloat 15s ease-in-out infinite reverse;
}
.login-orb--3 {
  width: 200px;
  height: 200px;
  background: rgba(16,185,129,.05);
  top: 50%;
  left: 60%;
  animation: orbFloat 10s ease-in-out infinite 3s;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(30px, -20px) scale(1.05); }
  66% { transform: translate(-20px, 15px) scale(0.95); }
}

/* ═══════════════════════════════════════════════════════
   LOGIN CARD
═══════════════════════════════════════════════════════ */
.login-card {
  position: relative;
  z-index: 1;
  width: 100%;
  max-width: 440px;
  margin: 20px;
  background: var(--login-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,.6);
  border-radius: var(--login-radius);
  padding: 48px 40px 40px;
  box-shadow: var(--login-shadow);
  animation: loginSlideUp .6s cubic-bezier(.16,1,.3,1) both;
}

.login-card::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  border: 1px solid rgba(255,255,255,.4);
  mask: linear-gradient(135deg, white 30%, transparent 70%);
  -webkit-mask: linear-gradient(135deg, white 30%, transparent 70%);
  pointer-events: none;
}

@keyframes loginSlideUp {
  from {
    opacity: 0;
    transform: translateY(24px) scale(.97);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* ── Header del card ─────────────────────────────────── */
.login-header {
  text-align: center;
  margin-bottom: 36px;
}

.login-avatar {
  width: 64px;
  height: 64px;
  margin: 0 auto 20px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--login-primary) 0%, #3b82f6 100%);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow:
    0 8px 24px -4px rgba(37,99,235,.30),
    0 0 0 6px rgba(37,99,235,.08);
  animation: avatarPulse 3s ease-in-out infinite;
}

.login-avatar svg {
  width: 28px;
  height: 28px;
  fill: #ffffff;
}

@keyframes avatarPulse {
  0%, 100% { box-shadow: 0 8px 24px -4px rgba(37,99,235,.30), 0 0 0 6px rgba(37,99,235,.08); }
  50% { box-shadow: 0 8px 24px -4px rgba(37,99,235,.40), 0 0 0 10px rgba(37,99,235,.04); }
}

.login-title {
  font-size: 1.55rem;
  font-weight: 800;
  color: var(--login-text);
  margin: 0 0 8px;
  letter-spacing: -.02em;
}

.login-subtitle {
  font-size: .92rem;
  color: var(--login-text-2);
  margin: 0;
  font-weight: 400;
}

/* ═══════════════════════════════════════════════════════
   FORM
═══════════════════════════════════════════════════════ */
.login-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.login-field {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.login-label {
  font-size: .82rem;
  font-weight: 600;
  color: var(--login-text-2);
  display: flex;
  align-items: center;
  gap: 6px;
}

.login-label svg {
  width: 15px;
  height: 15px;
  fill: var(--login-text-3);
  flex-shrink: 0;
}

.login-input {
  width: 100%;
  padding: 13px 16px;
  font-size: .95rem;
  font-family: inherit;
  color: var(--login-text);
  background: rgba(255,255,255,.6);
  border: 1.5px solid rgba(37,99,235,.12);
  border-radius: 12px;
  outline: none;
  transition: all var(--login-transition);
  box-sizing: border-box;
}

.login-input::placeholder {
  color: var(--login-text-3);
}

.login-input:focus {
  border-color: var(--login-primary);
  background: #fff;
  box-shadow: 0 0 0 4px rgba(37,99,235,.08);
}

.login-input:hover:not(:focus) {
  border-color: rgba(37,99,235,.25);
}

/* ── Password toggle ─────────────────────────────────── */
.login-input-wrap {
  position: relative;
}

.login-input-wrap .login-input {
  padding-right: 44px;
}

.login-toggle-pw {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  padding: 4px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--login-text-3);
  transition: color var(--login-transition);
}

.login-toggle-pw:hover {
  color: var(--login-primary);
}

.login-toggle-pw svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* ═══════════════════════════════════════════════════════
   SUBMIT BUTTON
═══════════════════════════════════════════════════════ */
.login-btn {
  width: 100%;
  padding: 14px 24px;
  font-size: 1rem;
  font-weight: 700;
  font-family: inherit;
  color: #fff;
  background: linear-gradient(135deg, var(--login-primary) 0%, #3b82f6 50%, var(--login-primary-dk) 100%);
  background-size: 200% auto;
  border: none;
  border-radius: 12px;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  transition: all var(--login-transition);
  box-shadow: 0 4px 16px -2px rgba(37,99,235,.30);
  margin-top: 4px;
  position: relative;
  overflow: hidden;
}

.login-btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 0%, rgba(255,255,255,.15) 50%, transparent 100%);
  opacity: 0;
  transition: opacity .3s;
}

.login-btn:hover {
  background-position: right center;
  transform: translateY(-2px);
  box-shadow: 0 8px 24px -4px rgba(37,99,235,.40);
}

.login-btn:hover::before {
  opacity: 1;
}

.login-btn:active {
  transform: translateY(0);
  box-shadow: 0 4px 12px -2px rgba(37,99,235,.25);
}

.login-btn svg {
  width: 18px;
  height: 18px;
  fill: #fff;
  transition: transform .3s;
}

.login-btn:hover svg {
  transform: translateX(3px);
}

/* ── Loading state ───────────────────────────────────── */
.login-btn.loading {
  pointer-events: none;
  opacity: .85;
}

.login-btn.loading .login-btn-text {
  visibility: hidden;
}

.login-btn.loading .login-btn-arrow {
  visibility: hidden;
}

.login-spinner {
  display: none;
  width: 20px;
  height: 20px;
  border: 2.5px solid rgba(255,255,255,.3);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin .7s linear infinite;
  position: absolute;
}

.login-btn.loading .login-spinner {
  display: block;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

/* ═══════════════════════════════════════════════════════
   FOOTER LINK
═══════════════════════════════════════════════════════ */
.login-footer {
  text-align: center;
  margin-top: 24px;
  padding-top: 20px;
  border-top: 1px solid rgba(37,99,235,.06);
}

.login-footer-link {
  font-size: .85rem;
  color: var(--login-text-3);
  text-decoration: none;
  transition: color var(--login-transition);
  cursor: pointer;
  background: none;
  border: none;
  font-family: inherit;
}

.login-footer-link:hover {
  color: var(--login-primary);
}

/* ── Brand footer ────────────────────────────────────── */
.login-brand {
  text-align: center;
  margin-top: 28px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.login-brand img {
  height: 28px;
  width: auto;
  object-fit: contain;
  border-radius: 4px;
  opacity: .6;
  transition: opacity .3s;
}

.login-brand img:hover {
  opacity: 1;
}

.login-brand-text {
  font-size: .75rem;
  color: var(--login-text-3);
  font-weight: 500;
  letter-spacing: .02em;
}

/* ═══════════════════════════════════════════════════════
   ERROR MESSAGE
═══════════════════════════════════════════════════════ */
.login-error {
  display: none;
  align-items: center;
  gap: 8px;
  padding: 12px 16px;
  background: rgba(225,29,72,.06);
  border: 1px solid rgba(225,29,72,.15);
  border-radius: 10px;
  color: #be123c;
  font-size: .85rem;
  font-weight: 500;
  animation: shakeError .4s ease;
}

.login-error.visible {
  display: flex;
}

.login-error svg {
  width: 18px;
  height: 18px;
  fill: #e11d48;
  flex-shrink: 0;
}

@keyframes shakeError {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

/* ═══════════════════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════════════════ */
@media (max-width: 480px) {
  .login-card {
    padding: 36px 24px 32px;
    margin: 16px;
    border-radius: 18px;
  }

  .login-title {
    font-size: 1.35rem;
  }

  .login-avatar {
    width: 56px;
    height: 56px;
  }

  .login-avatar svg {
    width: 24px;
    height: 24px;
  }
}