:root {
  --bg: #f5ede2;
  --paper: #fffaf3;
  --ink: #211911;
  --muted: #6b6159;
  --line: #deccb5;
  --gold: #bc8a35;
  --gold-light: #e1bc75;
  --green: #27584a;
  --error: #a33a32;
  --success: #2e6d38;
}

* { box-sizing: border-box; }

html,
body { height: 100%; }

body {
  display: grid;
  height: 100vh;
  margin: 0;
  padding: 32px 16px;
  overflow: hidden;
  place-items: center;
  color: var(--muted);
  font-family: "Manrope", sans-serif;
  background: radial-gradient(circle at 0 0, #ffeecd 0, transparent 38%), var(--bg);
}

.auth-shell { width: min(560px, 92vw); }

.back-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  color: var(--muted);
  font-size: 0.9rem;
  font-weight: 700;
  text-decoration: none;
}

.back-link:hover { color: var(--ink); }
.back-link i { transition: transform 0.2s ease; }
.back-link:hover i { transform: translateX(-3px); }

.auth-card {
  margin-top: 14px;
  padding: 30px;
  overflow: hidden;
  border: 1px solid var(--line);
  border-radius: 22px;
  background: var(--paper);
  box-shadow: 0 12px 28px rgba(46, 31, 16, 0.08);
}

.auth-header { min-height: 132px; }

.kicker {
  margin: 0;
  color: var(--green);
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

h1 {
  margin: 8px 0 10px;
  color: #000;
  font-family: "Manrope", sans-serif;
  font-size: clamp(1.8rem, 4vw, 2.5rem);
  font-weight: 800;
  letter-spacing: -0.04em;
  line-height: 1.1;
}

.lead {
  margin: 0;
  color: var(--ink);
  font-size: 0.92rem;
  line-height: 1.6;
}

.tabs {
  --tab-gap: 4px;
  --tab-padding: 4px;
  position: relative;
  display: grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: var(--tab-gap);
  padding: var(--tab-padding);
  isolation: isolate;
  border: 1px solid var(--line);
  border-radius: 999px;
  background: #f8f0e6;
}

.tab-indicator {
  position: absolute;
  top: var(--tab-padding);
  left: var(--tab-padding);
  width: calc((100% - (var(--tab-padding) * 2) - (var(--tab-gap) * 2)) / 3);
  height: calc(100% - (var(--tab-padding) * 2));
  z-index: 0;
  pointer-events: none;
  border-radius: 999px;
  background: linear-gradient(120deg, var(--gold), var(--gold-light));
  box-shadow: 0 2px 5px rgba(72, 45, 13, 0.14), inset 0 1px 0 rgba(255, 255, 255, 0.22);
  transition: transform 0.55s cubic-bezier(0.22, 1, 0.36, 1);
}

.tabs[data-active="register"] .tab-indicator { transform: translateX(calc(100% + var(--tab-gap))); }
.tabs[data-active="forgot"] .tab-indicator { transform: translateX(calc((100% + var(--tab-gap)) * 2)); }

.tab {
  position: relative;
  z-index: 1;
  min-width: 0;
  min-height: 40px;
  padding: 8px 6px;
  border: 0;
  border-radius: 999px;
  color: var(--ink);
  font-family: inherit;
  font-size: 0.82rem;
  font-weight: 800;
  cursor: pointer;
  background: transparent;
  transition: color 0.25s ease;
}

.tab:hover,
.tab.active { color: var(--ink); }

.form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 16px;
}

.field {
  display: grid;
  max-height: 90px;
  gap: 6px;
  margin: 0;
  overflow: hidden;
  color: var(--muted);
  font-size: 0.93rem;
  font-weight: 600;
  transition: max-height 0.38s cubic-bezier(0.22, 1, 0.36, 1), opacity 0.25s ease, transform 0.38s cubic-bezier(0.22, 1, 0.36, 1);
}

.field.hidden {
  max-height: 0;
  opacity: 0;
  pointer-events: none;
  transform: translateY(-10px);
}

.field input {
  width: 100%;
  min-height: 44px;
  padding: 12px 13px;
  border: 1px solid var(--line);
  border-radius: 10px;
  outline: none;
  color: var(--ink);
  font: 500 0.92rem inherit;
  background: #fff;
  transition: border-color 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
}

.field input::placeholder { color: #a79b90; }
.field input:hover { border-color: #cdb99e; }
.field input:focus {
  border-color: var(--gold);
  background: #fffdf9;
  box-shadow: 0 0 0 3px rgba(188, 138, 53, 0.12);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 46px;
  gap: 8px;
  width: 100%;
  margin-top: 4px;
  padding: 11px 18px;
  border: 0;
  border-radius: 999px;
  color: var(--ink);
  font-family: inherit;
  font-size: 1rem;
  font-weight: 800;
  cursor: pointer;
  background: linear-gradient(120deg, var(--gold), var(--gold-light));
  box-shadow: 0 4px 10px rgba(110, 75, 25, 0.12);
  transition: transform 0.2s ease, box-shadow 0.2s ease, filter 0.2s ease;
}

.btn:hover { filter: brightness(1.03); box-shadow: 0 6px 14px rgba(110, 75, 25, 0.16); }
.btn:hover i { transform: translateX(4px); }
.btn:active { transform: scale(0.99); }
.btn:disabled { cursor: wait; opacity: 0.7; }
.btn i { transition: transform 0.3s cubic-bezier(0.22, 1, 0.36, 1); }

.status {
  min-height: 22px;
  margin: 14px 0 0;
  color: var(--muted);
  font-size: 0.84rem;
  font-weight: 600;
  line-height: 1.4;
  text-align: center;
  opacity: 0;
  transform: translateY(-5px);
  transition: opacity 0.28s ease, transform 0.32s ease;
}

.status.show { opacity: 1; transform: translateY(0); }
.status.error { color: var(--error); }
.status.success { color: var(--success); }

@media (max-width: 520px) {
  body { padding: 20px 12px; }
  .auth-shell { width: 100%; }
  .auth-card { padding: 24px 20px; border-radius: 18px; }
  .auth-header { min-height: 138px; }
  .tabs { --tab-gap: 2px; --tab-padding: 3px; }
  .tab { min-height: 38px; padding: 7px 4px; font-size: 0.76rem; }
}

@media (max-width: 380px) {
  .auth-card { padding: 22px 16px; }
  .tab { font-size: 0.72rem; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { transition-duration: 0.01ms !important; }
}