/* ═══════════════════════════════════════════════════════════════
   EXAMI – Auth Pages (Login & Signup)
   Professional, mobile-first design
═══════════════════════════════════════════════════════════════ */

:root {
  --primary:       #4F46E5;
  --primary-dark:  #3730A3;
  --primary-light: #818CF8;
  --secondary:     #06B6D4;
  --success:       #10B981;
  --warning:       #F59E0B;
  --danger:        #EF4444;
  --text-900:      #0F172A;
  --text-700:      #334155;
  --text-500:      #64748B;
  --text-300:      #CBD5E1;
  --border:        #E2E8F0;
  --bg-light:      #F8FAFC;
  --radius:        12px;
  --radius-sm:     8px;
  --shadow:        0 4px 24px rgba(0,0,0,.08);
  --shadow-lg:     0 20px 60px rgba(0,0,0,.14);
  --font:          'Inter', 'Hind Siliguri', sans-serif;
  --font-bn:       'Hind Siliguri', sans-serif;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { font-size: 16px; }
body { font-family: var(--font); color: var(--text-700); -webkit-font-smoothing: antialiased; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* ─── Layout ─────────────────────────────────────────────────── */
.auth-body {
  min-height: 100vh;
  background: var(--bg-light);
  display: flex;
  align-items: stretch;
}

.auth-layout {
  display: flex;
  width: 100%;
  min-height: 100vh;
}

/* ─── Left Panel ─────────────────────────────────────────────── */
.auth-panel {
  display: none;
  position: relative;
  width: 420px;
  flex-shrink: 0;
  background: linear-gradient(145deg, var(--primary) 0%, #3730A3 60%, #1E1B4B 100%);
  color: #fff;
  overflow: hidden;
}

.auth-panel--signup {
  background: linear-gradient(145deg, #0F766E 0%, #0369A1 60%, #1E1B4B 100%);
}

@media (min-width: 900px) { .auth-panel { display: flex; } }
@media (min-width: 1100px) { .auth-panel { width: 480px; } }

.auth-panel__inner {
  position: relative;
  z-index: 2;
  display: flex;
  flex-direction: column;
  padding: 2.5rem 2.5rem 2rem;
  height: 100%;
  gap: 1.5rem;
}

/* Decorative blobs */
.panel-blob {
  position: absolute;
  border-radius: 50%;
  opacity: .12;
  pointer-events: none;
}
.panel-blob--1 {
  width: 400px; height: 400px;
  background: #fff;
  top: -150px; right: -150px;
}
.panel-blob--2 {
  width: 300px; height: 300px;
  background: var(--secondary);
  bottom: -100px; left: -100px;
  opacity: .18;
}

/* Logo */
.auth-logo {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-weight: 800;
  font-size: 1.5rem;
  color: #fff;
  text-decoration: none;
}
.auth-logo--mobile {
  display: flex;
  color: var(--text-900);
  margin-bottom: 1.5rem;
  font-size: 1.35rem;
}
.auth-logo--mobile .logo-wordmark { color: var(--primary); }
@media (min-width: 900px) { .auth-logo--mobile { display: none; } }
.logo-wordmark { color: rgba(255,255,255,.95); }

/* Panel Content */
.auth-panel__hero { margin-top: .5rem; }
.auth-panel__title {
  font-size: 1.9rem;
  font-weight: 800;
  line-height: 1.2;
  margin-bottom: .75rem;
  font-family: var(--font-bn);
}
.auth-panel__sub {
  font-size: .9rem;
  opacity: .8;
  line-height: 1.7;
  font-family: var(--font-bn);
}

/* Features list */
.auth-panel__features {
  display: flex;
  flex-direction: column;
  gap: 1rem;
  list-style: none;
  margin-top: .5rem;
}
.auth-panel__features li {
  display: flex;
  align-items: flex-start;
  gap: .875rem;
}
.feat-icon {
  font-size: 1.3rem;
  flex-shrink: 0;
  margin-top: .1rem;
}
.auth-panel__features strong {
  display: block;
  font-size: .9rem;
  font-weight: 700;
  margin-bottom: .1rem;
  font-family: var(--font-bn);
}
.auth-panel__features small {
  font-size: .78rem;
  opacity: .75;
  font-family: var(--font-bn);
}

/* Stats bar */
.auth-panel__stats {
  display: flex;
  gap: 1.5rem;
  padding: 1.1rem 1.25rem;
  background: rgba(255,255,255,.12);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
  margin-top: auto;
}
.panel-stat strong { display: block; font-size: 1.1rem; font-weight: 800; }
.panel-stat span { font-size: .72rem; opacity: .75; font-family: var(--font-bn); }

/* Trial Box */
.trial-box {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 1rem 1.25rem;
  background: rgba(255,255,255,.15);
  border: 1px solid rgba(255,255,255,.25);
  border-radius: var(--radius);
  backdrop-filter: blur(8px);
}
.trial-box__icon { font-size: 2rem; flex-shrink: 0; }
.trial-box strong { display: block; font-size: .95rem; font-weight: 700; font-family: var(--font-bn); margin-bottom: .2rem; }
.trial-box p { font-size: .78rem; opacity: .8; font-family: var(--font-bn); }

/* Review */
.auth-panel__review {
  margin-top: auto;
  padding: 1.1rem 1.25rem;
  background: rgba(255,255,255,.1);
  border-radius: var(--radius);
  border-left: 3px solid rgba(255,255,255,.4);
}
.review-stars { font-size: .9rem; color: #FCD34D; margin-bottom: .4rem; }
.auth-panel__review p { font-size: .85rem; opacity: .9; line-height: 1.6; font-family: var(--font-bn); font-style: italic; margin-bottom: .4rem; }
.auth-panel__review cite { font-size: .78rem; opacity: .7; font-style: normal; font-family: var(--font-bn); }

/* ─── Right Panel (Form) ──────────────────────────────────────── */
.auth-form-panel {
  flex: 1;
  display: flex;
  align-items: flex-start;
  justify-content: center;
  padding: 2rem 1.25rem;
  overflow-y: auto;
  background: #fff;
}

@media (min-width: 600px) { .auth-form-panel { padding: 2.5rem 2rem; } }
@media (min-width: 900px) { .auth-form-panel { align-items: center; padding: 3rem 3rem; } }

.auth-form-wrap {
  width: 100%;
  max-width: 460px;
}

/* Form Header */
.auth-form-header {
  margin-bottom: 1.75rem;
}
.auth-form-header h2 {
  font-size: 1.7rem;
  font-weight: 800;
  color: var(--text-900);
  margin-bottom: .35rem;
  font-family: var(--font-bn);
}
.auth-form-header p {
  color: var(--text-500);
  font-size: .95rem;
  font-family: var(--font-bn);
}

/* ─── Toast ───────────────────────────────────────────────────── */
.toast {
  display: flex;
  align-items: center;
  gap: .75rem;
  padding: .875rem 1.1rem;
  border-radius: var(--radius-sm);
  font-size: .9rem;
  font-weight: 500;
  margin-bottom: 1.25rem;
  font-family: var(--font-bn);
  animation: slideDown .3s ease;
}
.toast--success { background: #ECFDF5; color: #065F46; border: 1px solid #A7F3D0; }
.toast--error   { background: #FEF2F2; color: #991B1B; border: 1px solid #FECACA; }
.toast--loading { background: #EFF6FF; color: #1E40AF; border: 1px solid #BFDBFE; }

@keyframes slideDown {
  from { opacity: 0; transform: translateY(-10px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ─── Social Buttons ─────────────────────────────────────────── */
.social-btns {
  display: flex;
  flex-direction: column;
  gap: .75rem;
  margin-bottom: 1.5rem;
}

.social-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .75rem;
  padding: .8rem 1.25rem;
  border-radius: var(--radius-sm);
  font-size: .95rem;
  font-weight: 600;
  transition: all .2s ease;
  font-family: var(--font-bn);
  border: 1.5px solid var(--border);
  background: #fff;
  color: var(--text-700);
  width: 100%;
}
.social-btn:hover {
  border-color: var(--text-300);
  background: var(--bg-light);
  transform: translateY(-1px);
  box-shadow: var(--shadow);
}
.social-btn:active { transform: translateY(0); }
.social-btn--google:hover  { border-color: #EA4335; background: #FFF5F5; }
.social-btn--facebook:hover { border-color: #1877F2; background: #F0F4FF; }

@media (min-width: 500px) { .social-btns { flex-direction: row; } }

/* ─── Divider ────────────────────────────────────────────────── */
.divider {
  position: relative;
  text-align: center;
  margin: 1.25rem 0;
}
.divider::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0; right: 0;
  height: 1px;
  background: var(--border);
}
.divider span {
  position: relative;
  background: #fff;
  padding: 0 .875rem;
  font-size: .82rem;
  color: var(--text-500);
}

/* ─── Input Tabs ─────────────────────────────────────────────── */
.input-tabs {
  display: flex;
  background: var(--bg-light);
  border-radius: var(--radius-sm);
  padding: 3px;
  margin-bottom: 1rem;
  border: 1px solid var(--border);
}
.input-tab {
  flex: 1;
  padding: .45rem;
  border-radius: 6px;
  font-size: .875rem;
  font-weight: 600;
  color: var(--text-500);
  transition: all .2s;
  font-family: var(--font-bn);
  text-align: center;
}
.input-tab.active {
  background: #fff;
  color: var(--primary);
  box-shadow: 0 1px 4px rgba(0,0,0,.1);
}

/* ─── Form Elements ──────────────────────────────────────────── */
.form-group {
  margin-bottom: 1.1rem;
}

.form-label {
  display: block;
  font-size: .875rem;
  font-weight: 600;
  color: var(--text-700);
  margin-bottom: .5rem;
  font-family: var(--font-bn);
}
.form-label-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: .5rem;
}
.form-label-row .form-label { margin-bottom: 0; }

.required { color: var(--danger); }
.optional  { color: var(--text-500); font-weight: 400; font-size: .78rem; }

.form-link {
  font-size: .82rem;
  color: var(--primary);
  font-weight: 600;
  font-family: var(--font-bn);
}
.form-link:hover { text-decoration: underline; }

/* Input Wrap */
.input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.input-icon {
  position: absolute;
  left: .875rem;
  color: var(--text-500);
  display: flex;
  align-items: center;
  pointer-events: none;
  z-index: 1;
}

.input-prefix {
  position: absolute;
  left: 2.75rem;
  font-size: .875rem;
  color: var(--text-700);
  font-weight: 600;
  pointer-events: none;
  z-index: 1;
}

.form-input {
  width: 100%;
  padding: .75rem 1rem .75rem 2.75rem;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-size: .95rem;
  color: var(--text-900);
  background: #fff;
  font-family: var(--font);
  transition: border-color .15s, box-shadow .15s;
  outline: none;
  -webkit-appearance: none;
}
.form-input--prefixed { padding-left: 5rem; }

.form-input::placeholder { color: var(--text-300); }
.form-input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(79,70,229,.12);
}
.form-input.error  { border-color: var(--danger); box-shadow: 0 0 0 3px rgba(239,68,68,.1); }
.form-input.valid  { border-color: var(--success); }

.form-select {
  padding-left: 2.75rem;
  cursor: pointer;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%2364748B' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right .875rem center;
  padding-right: 2.5rem;
  appearance: none;
}

.input-toggle {
  position: absolute;
  right: .875rem;
  color: var(--text-500);
  display: flex;
  align-items: center;
  padding: .25rem;
  border-radius: 4px;
  transition: color .15s;
}
.input-toggle:hover { color: var(--primary); }

.form-error {
  display: block;
  font-size: .78rem;
  color: var(--danger);
  margin-top: .35rem;
  font-family: var(--font-bn);
  min-height: 1rem;
}

/* ─── Password Strength ──────────────────────────────────────── */
.pw-strength {
  display: flex;
  align-items: center;
  gap: .75rem;
  margin-top: .5rem;
}
.pw-strength__bar {
  flex: 1;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  overflow: hidden;
}
.pw-strength__fill {
  height: 100%;
  width: 0%;
  border-radius: 2px;
  transition: width .3s ease, background .3s ease;
}
.pw-strength__label {
  font-size: .75rem;
  font-weight: 600;
  white-space: nowrap;
  font-family: var(--font-bn);
}
.strength-weak   .pw-strength__fill { width: 33%; background: var(--danger); }
.strength-medium .pw-strength__fill { width: 66%; background: var(--warning); }
.strength-strong .pw-strength__fill { width: 100%; background: var(--success); }
.strength-weak   .pw-strength__label { color: var(--danger); }
.strength-medium .pw-strength__label { color: var(--warning); }
.strength-strong .pw-strength__label { color: var(--success); }

/* ─── Checkbox ───────────────────────────────────────────────── */
.form-check { margin-bottom: 1.25rem; }
.check-label {
  display: flex;
  align-items: flex-start;
  gap: .625rem;
  cursor: pointer;
  font-size: .875rem;
  color: var(--text-700);
  line-height: 1.5;
  font-family: var(--font-bn);
}
.check-input { display: none; }
.check-box {
  width: 18px; height: 18px;
  border: 2px solid var(--border);
  border-radius: 4px;
  flex-shrink: 0;
  margin-top: 1px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all .15s;
  background: #fff;
}
.check-input:checked + .check-box {
  background: var(--primary);
  border-color: var(--primary);
}
.check-input:checked + .check-box::after {
  content: '';
  width: 4px; height: 8px;
  border: 2px solid #fff;
  border-top: none;
  border-left: none;
  transform: rotate(45deg) translate(-1px, -1px);
}

/* ─── Submit Button ──────────────────────────────────────────── */
.btn-submit {
  width: 100%;
  padding: .9rem 1.5rem;
  background: var(--primary);
  color: #fff;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 700;
  font-family: var(--font-bn);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: .5rem;
  transition: all .2s ease;
  margin-bottom: 1.25rem;
  position: relative;
  overflow: hidden;
}
.btn-submit::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(255,255,255,.1) 0%, transparent 60%);
  pointer-events: none;
}
.btn-submit:hover:not(:disabled) {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(79,70,229,.35);
}
.btn-submit:active { transform: translateY(0); }
.btn-submit:disabled { opacity: .7; cursor: not-allowed; transform: none; box-shadow: none; }

/* Spinner */
.spin {
  animation: rotate 1s linear infinite;
}
@keyframes rotate {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}

/* ─── Auth Footer ────────────────────────────────────────────── */
.auth-switch {
  text-align: center;
  font-size: .9rem;
  color: var(--text-500);
  margin-bottom: .75rem;
  font-family: var(--font-bn);
}
.auth-switch__link {
  color: var(--primary);
  font-weight: 700;
}
.auth-switch__link:hover { text-decoration: underline; }

.auth-terms {
  text-align: center;
  font-size: .78rem;
  color: var(--text-500);
  line-height: 1.6;
  font-family: var(--font-bn);
}
.auth-terms a { color: var(--primary); }
.auth-terms a:hover { text-decoration: underline; }

/* ─── Focus / Accessibility ──────────────────────────────────── */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

/* ─── Mobile Responsive ──────────────────────────────────────── */
@media (max-width: 400px) {
  .auth-form-panel { padding: 1.5rem 1rem; }
  .auth-form-header h2 { font-size: 1.4rem; }
  .social-btn { font-size: .85rem; padding: .7rem 1rem; }
}