@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@400;600;700;800&display=swap');

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

:root {
  --blue-deep:   #0b3d91;
  --blue-mid:    #1560c8;
  --blue-light:  #e8f0fe;
  --blue-accent: #3b82f6;
  --gray-50:     #f9fafb;
  --gray-200:    #e5e7eb;
  --gray-600:    #4b5563;
  --gray-800:    #1f2937;
  --white:       #ffffff;
  --shadow-lg:   0 10px 40px rgba(11,61,145,.18);
  --radius-sm:   8px;
  --radius-lg:   20px;
  --transition:  .18s ease;
}

body {
  font-family: 'Nunito', 'Segoe UI', sans-serif;
  background: linear-gradient(145deg, #0b3d91 0%, #1560c8 60%, #3a7fe6 100%);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 20px;
  margin: 0;
}

body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image:
    radial-gradient(circle at 20% 20%, rgba(255,255,255,.06) 0%, transparent 50%),
    radial-gradient(circle at 80% 80%, rgba(255,255,255,.04) 0%, transparent 50%);
  pointer-events: none;
}

.container {
  width: 100%;
  max-width: 440px;
  margin: auto 0;
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
  animation: slideUp .4s cubic-bezier(.22,.68,0,1.2) both;
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(24px) scale(.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}

.container::before {
  content: 'Hệ thống theo dõi quá trình xét thưởng SV5T\A KHOA HÓA HỌC';
  white-space: pre-line;
  display: block;
  background: var(--blue-deep);
  color: var(--white);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .06em;
  text-align: center;
  padding: 10px 20px;
  opacity: .9;
}

h2, h3 {
  text-align: center;
  color: var(--blue-deep);
  margin: 0 0 18px;
}

h2 { font-size: 22px; font-weight: 800; margin: 28px 0 6px; }
h3 { font-size: 17px; font-weight: 700; }

#step1,
#step2,
#createPasswordForm,
#loginForm,
#resetPasswordForm {
  padding: 0 28px 28px;
}

label {
  display: block;
  margin-bottom: 6px;
  font-size: 14px;
  font-weight: 700;
  color: var(--gray-600);
}

input[type="text"],
input[type="password"] {
  width: 100%;
  padding: 13px 16px;
  margin-bottom: 16px;
  border: 1.5px solid var(--gray-200);
  border-radius: var(--radius-sm);
  font-family: inherit;
  font-size: 15px;
  color: var(--gray-800);
  background: var(--gray-50);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition), background var(--transition);
}

input:focus {
  border-color: var(--blue-accent);
  background: var(--white);
  box-shadow: 0 0 0 3px rgba(59,130,246,.15);
}

button {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--blue-deep);
  color: var(--white);
  font-family: inherit;
  font-size: 15px;
  font-weight: 700;
  cursor: pointer;
  transition: background var(--transition), transform .1s ease, box-shadow var(--transition);
  letter-spacing: .02em;
}

button:hover {
  background: var(--blue-mid);
  box-shadow: 0 4px 12px rgba(11,61,145,.3);
}

button:active { transform: scale(.98); }

.hidden { display: none !important; }

p {
  text-align: center;
  color: var(--gray-600);
  font-size: 14px;
  margin: 14px 0 0;
  min-height: 20px;
}

#step2 {
  background: var(--blue-light);
  border-radius: 14px;
  margin: 0 28px;
  padding: 18px 20px !important;
}

#step2 p { color: var(--gray-600); font-size: 13px; margin: 0 0 4px; text-align: left; }
#step2 h3 { text-align: left; margin: 0 0 14px; color: var(--blue-deep); font-size: 20px; }

@media (max-width: 480px) {
  .container { border-radius: 14px; }
  h2 { font-size: 19px; }
}

/* ── Reset form hint ── */
.hint {
  font-size: 14px;
  color: var(--gray-600);
  text-align: center;
  margin: 0 0 18px;
}

.hint strong { color: var(--blue-deep); }

/* ── Info box (step 2) ── */
.info-box {
  background: var(--blue-light);
  border-radius: 12px;
  padding: 16px 18px;
  margin-bottom: 18px;
}

.info-label {
  font-size: 12px;
  font-weight: 700;
  color: var(--gray-600);
  text-transform: uppercase;
  letter-spacing: .05em;
  margin: 0 0 2px;
  text-align: left;
}

.info-value {
  font-size: 18px;
  font-weight: 800;
  color: var(--blue-deep);
  margin: 0 0 12px;
  text-align: left;
}

.info-value:last-child { margin-bottom: 0; }

/* ── Ghost button (secondary) ── */
.btn-ghost {
  background: transparent !important;
  color: var(--gray-600) !important;
  border: 1.5px solid var(--gray-200) !important;
  box-shadow: none !important;
  margin-top: 10px;
}

.btn-ghost:hover {
  background: var(--gray-100) !important;
  color: var(--gray-800) !important;
  box-shadow: none !important;
}

/* ── Link button (quên mật khẩu) ── */
.btn-link {
  background: transparent !important;
  color: var(--blue-mid) !important;
  font-size: 13px !important;
  font-weight: 600 !important;
  text-decoration: underline;
  padding: 8px !important;
  box-shadow: none !important;
  margin-top: 4px;
}

.btn-link:hover {
  color: var(--blue-deep) !important;
  box-shadow: none !important;
  background: transparent !important;
}

/* ── Message states ── */
.msg-success {
  color: #059669 !important;
  background: #d1fae5;
  border-radius: 8px;
  padding: 10px 14px !important;
}

.msg-error {
  color: #dc2626 !important;
  background: #fee2e2;
  border-radius: 8px;
  padding: 10px 14px !important;
}

/* ── Footer link (đăng nhập quản trị) ── */
.footer-link {
  text-align: center;
  padding: 16px 28px 20px;
  border-top: 1px solid var(--gray-200);
  margin-top: 8px;
}

.footer-link a {
  font-size: 13px;
  font-weight: 600;
  color: var(--gray-400);
  text-decoration: none;
  transition: color .18s ease;
}

.footer-link a:hover {
  color: var(--blue-mid);
}

.password-field {
  position: relative;
  width: 100%;
  display: block;
}

.password-field input {
  width: 100%;
  padding-right: 52px;
}

.password-field .password-toggle {
  position: absolute;
  top: 40%;
  right: 14px;
  transform: translateY(-50%);

  width: 34px;
  height: 34px;
  min-width: 34px;

  padding: 0;
  margin: 0;

  border: none;
  border-radius: 50%;
  background: transparent;

  color: #6b7280;
  cursor: pointer;

  display: flex;
  align-items: center;
  justify-content: center;

  box-shadow: none;
}

.password-field .password-toggle:hover {
  background: #eef2ff;
  color: #0b3d91;
}

.password-field .password-toggle svg {
  width: 22px;
  height: 22px;
  pointer-events: none;
}

/* ── Reset password form ── */
#resetPasswordForm {
  position: relative;
}

#resetPasswordForm h2 {
  margin-top: 30px;
  margin-bottom: 8px;
  font-size: 24px;
}

#resetPasswordForm .hint {
  max-width: 330px;
  margin: 0 auto 22px;
  line-height: 1.5;
  color: var(--gray-600);
}

.reset-account-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  margin-top: 8px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--blue-light);
  color: var(--blue-deep);
  font-weight: 800;
  font-size: 14px;
}

.reset-password-card {
  margin-top: 18px;
}

.reset-password-card label {
  margin-top: 14px;
}

.reset-password-card .password-field input {
  border-radius: 14px;
  min-height: 52px;
  background: #f8fafc;
}

.reset-password-card .password-field input:focus {
  background: var(--white);
}

.reset-submit-btn {
  margin-top: 8px;
  border-radius: 14px;
  min-height: 52px;
  background: linear-gradient(135deg, var(--blue-deep), var(--blue-mid));
  box-shadow: 0 8px 18px rgba(11, 61, 145, 0.22);
}

.reset-submit-btn:hover {
  background: linear-gradient(135deg, #082f70, var(--blue-mid));
}

.reset-back-btn {
  margin-top: 14px;
  min-height: 48px;
  border-radius: 14px;
}

#resetMessage {
  margin-top: 14px;
}

.site-footer {
  width: 100%;
  max-width: 760px;
  margin: 0 auto;
  padding: 16px 20px 0;
  text-align: center;
  color: #ffffff;
  font-size: 13px;
  font-weight: 700;
  line-height: 1.6;
  flex-shrink: 0;
}

.site-footer p {
  margin: 2px 0;
  min-height: auto;
  color: #ffffff;
}

.auth-footer {
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.35);
}