/* ============================================================
   auth.css - Authentication Pages (login, register, reset password)
   ============================================================ */

/* === CSS Variables (local aliases for convenience) ========= */
.auth-container,
.auth-card,
.auth-header,
.auth-body {
  --primary: #102b6a;
  --primary-light: #1a3f8f;
  --gold: #fdb933;
  --orange: #f15a22;
  --red: #e74c3c;
  --green: #27ae60;
  --bg-light: #f4f6fb;
  --text-dark: #1a1a2e;
  --text-muted: #6b7280;
  --border-light: #e5e7eb;
  --radius-md: 8px;
  --radius-lg: 12px;
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.06);
  --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.08);
}

/* === Page Background ======================================= */
body:has(.auth-container) {
  background:
    linear-gradient(120deg, rgba(246, 249, 255, 0.68), rgba(250, 252, 255, 0.58) 44%, rgba(255, 255, 255, 0.76)),
    url("../img/auth-login-bg.png") center / cover no-repeat fixed;
  min-height: 100vh;
}

/* === Floating Background Decorations ======================= */
.auth-decoration {
  position: fixed;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

.auth-decoration-1 {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(16, 43, 106, 0.06) 0%, rgba(16, 43, 106, 0.02) 60%, transparent 70%);
  top: -120px;
  right: -100px;
  animation: float-decoration-1 20s ease-in-out infinite;
}

.auth-decoration-2 {
  width: 300px;
  height: 300px;
  background: radial-gradient(circle, rgba(253, 185, 51, 0.08) 0%, rgba(253, 185, 51, 0.02) 60%, transparent 70%);
  bottom: -80px;
  left: -80px;
  animation: float-decoration-2 25s ease-in-out infinite;
}

.auth-decoration-3 {
  width: 200px;
  height: 200px;
  background: radial-gradient(circle, rgba(241, 90, 34, 0.05) 0%, rgba(241, 90, 34, 0.01) 60%, transparent 70%);
  top: 50%;
  left: 60%;
  animation: float-decoration-3 18s ease-in-out infinite;
}

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

@keyframes float-decoration-2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33% { transform: translate(25px, -15px) scale(1.03); }
  66% { transform: translate(-10px, 20px) scale(0.97); }
}

@keyframes float-decoration-3 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-30px, 25px) scale(1.08); }
}

/* === Auth Container (centered flex) ======================== */
.auth-container {
  display: flex;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  padding: 24px;
  position: relative;
  z-index: 1;
}

/* === Auth Card ============================================= */
.auth-card {
  width: 420px;
  max-width: 100%;
  background: #ffffff;
  border-radius: 20px;
  box-shadow: 0 20px 60px rgba(16, 43, 106, 0.1), 0 8px 24px rgba(0, 0, 0, 0.06);
  overflow: hidden;
  position: relative;
  animation: card-appear 0.5s ease-out;
}

@keyframes card-appear {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Internal card decorations (inside the header) */
.auth-card .auth-decoration-1,
.auth-card .auth-decoration-2,
.auth-card .auth-decoration-3 {
  position: absolute;
  border-radius: 50%;
  pointer-events: none;
  z-index: 0;
}

.auth-card .auth-decoration-1 {
  width: 200px;
  height: 200px;
  background: rgba(253, 185, 51, 0.08);
  top: -80px;
  right: -60px;
}

.auth-card .auth-decoration-2 {
  width: 120px;
  height: 120px;
  background: rgba(241, 90, 34, 0.06);
  bottom: 50px;
  left: -40px;
}

.auth-card .auth-decoration-3 {
  width: 80px;
  height: 80px;
  background: rgba(255, 255, 255, 0.1);
  bottom: -20px;
  right: 30px;
}

/* === Auth Header =========================================== */
.auth-header {
  background: linear-gradient(135deg, var(--primary, #102b6a) 0%, var(--primary-light, #1a3f8f) 60%, #5b2c8e 100%);
  padding: 36px 40px 32px;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.auth-header::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 80px;
  height: 3px;
  background: linear-gradient(90deg, #fdb933, #f15a22);
  border-radius: 2px;
}

/* === Auth Logo ============================================= */
.auth-logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 220px;
  max-width: 76%;
  margin: 0 auto 10px;
  position: relative;
  z-index: 1;
  text-decoration: none;
  transition: transform 0.22s ease, filter 0.22s ease;
}

.auth-logo:hover {
  transform: translateY(-2px);
  filter: drop-shadow(0 10px 18px rgba(0, 0, 0, 0.22));
}

.auth-logo img {
  display: block;
  width: 100%;
  height: auto;
  object-fit: contain;
}

/* === Auth Subtitle ========================================= */
.auth-subtitle {
  font-size: 14px;
  color: rgba(255, 255, 255, 0.7);
  position: relative;
  z-index: 1;
}

/* === Auth Body ============================================= */
.auth-body {
  padding: 36px 36px 28px;
}

/* === Form Labels =========================================== */
.form-group label {
  display: block;
  font-size: 14px;
  font-weight: 600;
  color: var(--text-dark, #1a1a2e);
  margin-bottom: 8px;
}

/* === Form Group ============================================ */
.form-group {
  margin-bottom: 20px;
  position: relative;
}

/* === Form Input ============================================ */
.form-input {
  width: 100%;
  height: 46px;
  padding: 0 16px;
  border: 2px solid var(--border-light, #e5e7eb);
  border-radius: var(--radius-lg, 12px);
  font-size: 14px;
  color: var(--text-dark, #1a1a2e);
  background: var(--bg-light, #f4f6fb);
  transition: border-color 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease;
  outline: none;
  font-family: inherit;
}

.form-input::placeholder {
  color: var(--text-muted, #6b7280);
  font-weight: 400;
}

.form-input:focus {
  border-color: var(--primary, #102b6a);
  background: #ffffff;
  box-shadow: 0 0 0 4px rgba(16, 43, 106, 0.1);
}

.form-input:hover:not(:focus) {
  border-color: #d1d5db;
}

/* Disabled input state */
.form-input:disabled {
  background: #f9fafb;
  color: var(--text-muted, #6b7280);
  cursor: not-allowed;
  opacity: 0.7;
}

/* === Error State =========================================== */
.form-group.error .form-input {
  border-color: var(--red, #e74c3c);
  background: #fff5f5;
}

.form-group.error .form-input:focus {
  box-shadow: 0 0 0 4px rgba(231, 76, 60, 0.1);
}

.error-message {
  display: none;
  font-size: 12px;
  color: var(--red, #e74c3c);
  margin-top: 6px;
  padding-left: 4px;
  line-height: 1.4;
}

.form-group.error .error-message {
  display: block;
  animation: error-appear 0.2s ease-out;
}

@keyframes error-appear {
  from {
    opacity: 0;
    transform: translateY(-4px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

/* === Captcha Row =========================================== */
.captcha-row {
  display: flex;
  gap: 10px;
  align-items: stretch;
}

.captcha-row .form-input {
  flex: 1;
  min-width: 0;
}

.captcha-img-box {
  width: 120px;
  height: 46px;
  border: 2px solid var(--border-light, #e5e7eb);
  border-radius: var(--radius-lg, 12px);
  overflow: hidden;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--bg-light, #f4f6fb);
  flex-shrink: 0;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.captcha-img-box:hover {
  border-color: var(--primary, #102b6a);
  box-shadow: 0 0 0 3px rgba(16, 43, 106, 0.08);
}

.captcha-img-box img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.form-group.is-slide-mode .captcha-row {
  display: block;
}

.form-group.is-slide-mode .captcha-img-box {
  width: 100%;
  height: auto;
  min-height: 0;
  border: 0;
  border-radius: 0;
  overflow: visible;
  background: transparent;
  box-shadow: none;
}

.form-group.is-slide-mode .captcha-img-box:hover {
  border-color: transparent;
  box-shadow: none;
}

/* Captcha refresh link */
.captcha-refresh-link {
  font-size: 12px;
  color: var(--primary, #102b6a);
  cursor: pointer;
  text-decoration: none;
  display: inline-block;
  text-align: right;
  margin-top: 6px;
  transition: color 0.2s ease;
  user-select: none;
}

.captcha-refresh-link:hover {
  color: var(--orange, #f15a22);
}

/* === SMS Verification ====================================== */
.auth-sms-row {
  display: flex;
  gap: 10px;
  align-items: stretch;
}

.auth-sms-row .form-input {
  flex: 1;
  min-width: 0;
}

.auth-sms-button {
  width: 112px;
  height: 46px;
  border: none;
  border-radius: var(--radius-lg, 12px);
  background: linear-gradient(135deg, var(--primary, #102b6a), var(--primary-light, #1a3f8f));
  color: #ffffff;
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
  flex-shrink: 0;
  transition: transform 0.2s ease, box-shadow 0.2s ease, opacity 0.2s ease;
}

.auth-sms-button:hover:not(:disabled) {
  transform: translateY(-1px);
  box-shadow: 0 8px 18px rgba(16, 43, 106, 0.18);
}

.auth-sms-button:disabled {
  cursor: not-allowed;
  opacity: 0.62;
}

/* === Slide Verification ==================================== */
.slide-verify-card {
  width: 100%;
  min-height: 58px;
  padding: 10px 12px;
  border: 1px solid rgba(16, 43, 106, 0.14);
  border-radius: var(--radius-lg, 12px);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(244, 247, 253, 0.92)),
    linear-gradient(135deg, rgba(253, 185, 51, 0.16), rgba(26, 63, 143, 0.12));
  display: flex;
  align-items: center;
  justify-content: flex-start;
  gap: 10px;
  cursor: pointer;
  position: relative;
  overflow: hidden;
  box-shadow: inset 0 0 0 1px rgba(255, 255, 255, 0.68);
  transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.slide-verify-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(100deg, transparent 0%, rgba(253, 185, 51, 0.18) 45%, transparent 70%);
  transform: translateX(-100%);
  transition: transform 0.45s ease;
}

.slide-verify-card:hover {
  border-color: rgba(253, 185, 51, 0.5);
  box-shadow: 0 10px 24px rgba(16, 43, 106, 0.12);
  transform: translateY(-1px);
}

.slide-verify-card:hover::after {
  transform: translateX(100%);
}

.slide-verify-card.is-success {
  border-color: rgba(39, 174, 96, 0.38);
  background:
    linear-gradient(135deg, rgba(255, 255, 255, 0.94), rgba(239, 253, 246, 0.92)),
    linear-gradient(135deg, rgba(39, 174, 96, 0.16), rgba(16, 43, 106, 0.06));
  cursor: default;
}

.slide-verify-mark {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: linear-gradient(135deg, #fdb933, #f15a22);
  color: #ffffff;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 18px;
  font-weight: 800;
  flex: 0 0 38px;
  box-shadow: 0 8px 16px rgba(253, 185, 51, 0.26);
  position: relative;
  z-index: 1;
}

.slide-verify-card.is-success .slide-verify-mark {
  background: linear-gradient(135deg, #27ae60, #1a8f50);
  box-shadow: 0 8px 16px rgba(39, 174, 96, 0.22);
}

.slide-verify-main {
  min-width: 0;
  flex: 1;
  position: relative;
  z-index: 1;
}

.slide-verify-title {
  font-size: 13px;
  font-weight: 700;
  color: var(--text-dark, #1a1a2e);
  line-height: 1.25;
}

.slide-verify-desc {
  margin-top: 2px;
  font-size: 12px;
  color: var(--text-muted, #6b7280);
  line-height: 1.25;
}

.slide-verify-action {
  font-size: 12px;
  font-weight: 700;
  color: #ffffff;
  white-space: nowrap;
  padding: 5px 10px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--primary, #102b6a), var(--primary-light, #1a3f8f));
  position: relative;
  z-index: 1;
}

.slide-verify-card.is-success .slide-verify-action {
  background: linear-gradient(135deg, #27ae60, #1a8f50);
}

/* === Captcha Dialog ======================================== */
.captcha-dialog {
  padding: 24px;
  color: var(--text-dark, #1a1a2e);
}

.captcha-dialog-title {
  font-size: 18px;
  font-weight: 800;
  line-height: 1.3;
}

.captcha-dialog-desc {
  margin-top: 8px;
  font-size: 13px;
  line-height: 1.6;
  color: var(--text-muted, #6b7280);
}

.captcha-dialog-row {
  display: flex;
  gap: 10px;
  align-items: center;
  margin-top: 18px;
}

.captcha-dialog-input {
  flex: 1;
  min-width: 0;
  height: 44px;
  padding: 0 12px;
  border: 1px solid var(--border-light, #e5e7eb);
  border-radius: var(--radius-md, 10px);
  font-size: 14px;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.captcha-dialog-input:focus {
  border-color: var(--primary, #102b6a);
  box-shadow: 0 0 0 3px rgba(16, 43, 106, 0.08);
}

.captcha-dialog-img-box {
  width: 120px;
  height: 44px;
  border: 1px solid var(--border-light, #e5e7eb);
  border-radius: var(--radius-md, 10px);
  overflow: hidden;
  cursor: pointer;
  background: var(--bg-light, #f4f6fb);
  flex: 0 0 120px;
}

.captcha-dialog-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.captcha-dialog-tip {
  margin-top: 10px;
  font-size: 12px;
  color: var(--text-muted, #6b7280);
}

.captcha-dialog-tip span {
  color: var(--primary, #102b6a);
  cursor: pointer;
  font-weight: 700;
}

.captcha-dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 10px;
  margin-top: 22px;
}

.captcha-dialog-btn {
  min-width: 84px;
  height: 38px;
  border: 1px solid var(--border-light, #e5e7eb);
  border-radius: var(--radius-md, 10px);
  background: #ffffff;
  color: var(--text-dark, #1a1a2e);
  font-size: 13px;
  font-weight: 700;
  cursor: pointer;
}

.captcha-dialog-btn.primary {
  border-color: transparent;
  background: linear-gradient(135deg, var(--primary, #102b6a), var(--primary-light, #1a3f8f));
  color: #ffffff;
}

/* === Submit Button ========================================= */
.auth-submit-btn {
  width: 100%;
  height: 48px;
  border: none;
  border-radius: var(--radius-lg, 12px);
  font-size: 16px;
  font-weight: 700;
  letter-spacing: 4px;
  background: linear-gradient(135deg, var(--primary, #102b6a), var(--primary-light, #1a3f8f));
  color: #ffffff;
  cursor: pointer;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
  font-family: inherit;
  margin-top: 4px;
}

.auth-submit-btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
  transition: left 0.5s ease;
}

.auth-submit-btn:hover::before {
  left: 100%;
}

.auth-submit-btn:hover {
  box-shadow: 0 8px 24px rgba(16, 43, 106, 0.4);
  transform: translateY(-2px);
}

.auth-submit-btn:active {
  transform: translateY(0);
  box-shadow: 0 4px 12px rgba(16, 43, 106, 0.3);
}

/* Disabled submit button */
.auth-submit-btn:disabled {
  background: linear-gradient(135deg, #93a3be, #a8b5cc);
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
  letter-spacing: 2px;
}

.auth-submit-btn:disabled::before {
  display: none;
}

.auth-submit-btn:disabled:hover {
  transform: none;
  box-shadow: none;
}

/* === Agreement Checkbox ==================================== */
.auth-agreement {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: 12px;
  color: var(--text-muted, #6b7280);
  margin-top: 16px;
  margin-bottom: 8px;
  line-height: 1.5;
  flex-wrap: wrap;
}

.auth-agreement input[type="checkbox"] {
  accent-color: var(--primary, #102b6a);
  width: 16px;
  height: 16px;
  flex-shrink: 0;
  cursor: pointer;
}

.auth-agreement a {
  color: var(--primary, #102b6a);
  text-decoration: none;
  transition: color 0.2s ease;
  white-space: nowrap;
}

.auth-agreement a:hover {
  color: var(--orange, #f15a22);
  text-decoration: underline;
}

/* === Auth Links ============================================ */
.auth-links {
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  margin-top: 16px;
  padding-top: 16px;
  border-top: 1px solid var(--border-light, #e5e7eb);
}

.auth-links a {
  color: var(--primary, #102b6a);
  text-decoration: none;
  transition: color 0.2s ease;
  font-weight: 500;
}

.auth-links a:hover {
  color: var(--orange, #f15a22);
  text-decoration: underline;
}

.auth-wechat-login {
  margin-top: 18px;
  display: flex;
  justify-content: center;
}

.auth-wechat-login a {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  min-height: 48px;
  padding: 0 24px;
  border: 1px solid rgba(7, 193, 96, 0.24);
  border-radius: 24px;
  color: #07c160;
  background: rgba(7, 193, 96, 0.06);
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
}

.auth-wechat-login a:hover {
  background: rgba(7, 193, 96, 0.12);
  border-color: rgba(7, 193, 96, 0.42);
  transform: translateY(-1px);
}

.auth-wechat-icon {
  width: 34px;
  height: 34px;
  display: block;
  object-fit: contain;
}

/* ============================================================
   Register Page - Step Indicators
   ============================================================ */
.reg-step-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 28px;
  padding: 0 10px;
}

.reg-step {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  font-weight: 600;
  color: var(--text-muted, #6b7280);
  transition: color 0.3s ease;
}

.reg-step.active {
  color: var(--primary, #102b6a);
}

.reg-step.completed {
  color: var(--green, #27ae60);
}

.step-dot {
  width: 28px;
  height: 28px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 13px;
  font-weight: 700;
  background: var(--bg-light, #f4f6fb);
  color: var(--text-muted, #6b7280);
  border: 2px solid var(--border-light, #e5e7eb);
  transition: all 0.3s ease;
  flex-shrink: 0;
}

.reg-step.active .step-dot {
  background: var(--primary, #102b6a);
  color: #ffffff;
  border-color: var(--primary, #102b6a);
  box-shadow: 0 4px 12px rgba(16, 43, 106, 0.3);
}

.reg-step.completed .step-dot {
  background: var(--green, #27ae60);
  color: #ffffff;
  border-color: var(--green, #27ae60);
  box-shadow: 0 4px 12px rgba(39, 174, 96, 0.3);
}

.reg-step-line {
  width: 40px;
  height: 2px;
  background: var(--border-light, #e5e7eb);
  margin: 0 8px;
  border-radius: 1px;
  transition: background 0.3s ease;
  flex-shrink: 0;
}

.reg-step-line.active {
  background: var(--primary, #102b6a);
}

.reg-step-line.completed {
  background: var(--green, #27ae60);
}

/* ============================================================
   Register Page - Invite Code Row
   ============================================================ */
.invite-code-row {
  display: flex;
  gap: 10px;
  align-items: stretch;
}

.invite-code-row .form-input {
  flex: 1;
  min-width: 0;
}

.invite-code-row .invite-verify-btn {
  height: 46px;
  padding: 0 18px;
  border: 2px solid var(--primary, #102b6a);
  border-radius: var(--radius-lg, 12px);
  background: transparent;
  color: var(--primary, #102b6a);
  font-size: 13px;
  font-weight: 600;
  cursor: pointer;
  white-space: nowrap;
  flex-shrink: 0;
  transition: all 0.3s ease;
  font-family: inherit;
}

.invite-code-row .invite-verify-btn:hover {
  background: var(--primary, #102b6a);
  color: #ffffff;
  box-shadow: 0 4px 12px rgba(16, 43, 106, 0.3);
}

/* ============================================================
   Reset Password Page - Step Indicators
   ============================================================ */
.repwd-step-bar {
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 28px;
  padding: 0 10px;
}

.repwd-step-bar .reg-step {
  /* Reuse reg-step styles */
}

.repwd-step-bar .reg-step-line {
  /* Reuse reg-step-line styles */
}

/* ============================================================
   Reset Password Page - Password Strength Meter
   ============================================================ */
.pwd-strength {
  margin-top: 8px;
  margin-bottom: 4px;
}

.pwd-strength .strength-bar {
  display: flex;
  gap: 4px;
  margin-bottom: 4px;
}

.pwd-strength .strength-bar .bar-segment {
  flex: 1;
  height: 4px;
  border-radius: 2px;
  background: var(--border-light, #e5e7eb);
  transition: background 0.3s ease;
}

/* Strength levels */
.pwd-strength.level-weak .bar-segment:nth-child(1) {
  background: var(--red, #e74c3c);
}

.pwd-strength.level-medium .bar-segment:nth-child(1),
.pwd-strength.level-medium .bar-segment:nth-child(2) {
  background: var(--orange, #f15a22);
}

.pwd-strength.level-strong .bar-segment:nth-child(1),
.pwd-strength.level-strong .bar-segment:nth-child(2),
.pwd-strength.level-strong .bar-segment:nth-child(3) {
  background: var(--green, #27ae60);
}

.pwd-strength .strength-text {
  font-size: 11px;
  color: var(--text-muted, #6b7280);
  text-align: right;
  transition: color 0.3s ease;
}

.pwd-strength.level-weak .strength-text {
  color: var(--red, #e74c3c);
}

.pwd-strength.level-medium .strength-text {
  color: var(--orange, #f15a22);
}

.pwd-strength.level-strong .strength-text {
  color: var(--green, #27ae60);
}

/* ============================================================
   Loading Overlay
   ============================================================ */
.loading-overlay {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(255, 255, 255, 0.85);
  z-index: 9999;
  justify-content: center;
  align-items: center;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}

.loading-overlay.show {
  display: flex;
}

/* Card-scoped loading overlay (if placed inside .auth-card) */
.auth-card > .loading-overlay {
  position: absolute;
  border-radius: 20px;
}

.loading-spinner {
  width: 40px;
  height: 40px;
  border: 3px solid rgba(16, 43, 106, 0.15);
  border-top-color: var(--primary, #102b6a);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* Spinner with pulse effect */
.loading-spinner::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 8px;
  height: 8px;
  background: var(--primary, #102b6a);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  animation: pulse 1.2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 0.4; transform: translate(-50%, -50%) scale(0.8); }
  50% { opacity: 1; transform: translate(-50%, -50%) scale(1.2); }
}

/* ============================================================
   Page-specific Tweaks
   ============================================================ */

/* Register page - slightly tighter spacing for more fields */
.page-reg .auth-body,
.auth-body.reg-body {
  padding: 32px 36px 24px;
}

.page-reg .form-group {
  margin-bottom: 16px;
}

.page-reg .form-input {
  height: 44px;
}

.page-reg .auth-links {
  justify-content: center;
}

/* Reset password page */
.page-repwd .auth-body,
.auth-body.repwd-body {
  padding: 32px 36px 24px;
}

.page-repwd .form-group {
  margin-bottom: 16px;
}

/* ============================================================
   Responsive Styles
   ============================================================ */

/* Tablet and small desktop */
@media (max-width: 768px) {
  .auth-decoration-1 {
    width: 280px;
    height: 280px;
  }

  .auth-decoration-2 {
    width: 200px;
    height: 200px;
  }

  .auth-decoration-3 {
    width: 140px;
    height: 140px;
  }

  .auth-container {
    padding: 16px;
  }

  .auth-card {
    border-radius: 16px;
  }

  .auth-header {
    padding: 28px 28px 24px;
  }

  .auth-logo {
    width: 198px;
  }

  .auth-subtitle {
    font-size: 13px;
  }

  .auth-body {
    padding: 28px 24px 24px;
  }

  .form-input {
    height: 44px;
    font-size: 14px;
  }

  .captcha-img-box {
    height: 44px;
    width: 110px;
  }

  .auth-submit-btn {
    height: 46px;
    font-size: 15px;
  }

  /* Step indicators */
  .reg-step-bar,
  .repwd-step-bar {
    margin-bottom: 24px;
  }

  .step-dot {
    width: 26px;
    height: 26px;
    font-size: 12px;
  }

  .reg-step-line {
    width: 30px;
    margin: 0 6px;
  }
}

/* Mobile phones */
@media (max-width: 480px) {
  .auth-decoration-1 {
    width: 200px;
    height: 200px;
    top: -80px;
    right: -60px;
  }

  .auth-decoration-2 {
    width: 150px;
    height: 150px;
    bottom: -60px;
    left: -50px;
  }

  .auth-decoration-3 {
    width: 100px;
    height: 100px;
  }

  .auth-container {
    padding: 12px;
    min-height: 100vh;
  }

  .auth-card {
    border-radius: 14px;
    box-shadow: 0 12px 40px rgba(16, 43, 106, 0.1), 0 4px 16px rgba(0, 0, 0, 0.06);
  }

  .auth-header {
    padding: 24px 20px 20px;
  }

  .auth-logo {
    width: 176px;
  }

  .auth-subtitle {
    font-size: 12px;
  }

  .auth-body {
    padding: 24px 20px 20px;
  }

  .form-group {
    margin-bottom: 14px;
  }

  .form-group label {
    font-size: 13px;
    margin-bottom: 6px;
  }

  .form-input {
    height: 42px;
    padding: 0 12px;
    font-size: 14px;
    border-radius: var(--radius-md, 8px);
  }

  .form-input:focus {
    box-shadow: 0 0 0 3px rgba(16, 43, 106, 0.08);
  }

  /* Captcha on mobile */
  .captcha-row {
    gap: 8px;
  }

  .captcha-img-box {
    width: 100px;
    height: 42px;
    border-radius: var(--radius-md, 8px);
  }

  /* Submit button on mobile */
  .auth-submit-btn {
    height: 44px;
    font-size: 15px;
    letter-spacing: 2px;
    border-radius: var(--radius-md, 8px);
  }

  .auth-submit-btn:hover {
    transform: none;
    box-shadow: 0 4px 16px rgba(16, 43, 106, 0.3);
  }

  /* Agreement and links on mobile */
  .auth-agreement {
    font-size: 11px;
    gap: 4px;
  }

  .auth-links {
    font-size: 12px;
    margin-top: 12px;
    padding-top: 12px;
  }

  /* Step indicators on mobile */
  .reg-step-bar,
  .repwd-step-bar {
    margin-bottom: 20px;
  }

  .reg-step {
    font-size: 11px;
    gap: 4px;
  }

  .step-dot {
    width: 24px;
    height: 24px;
    font-size: 11px;
  }

  .reg-step-line {
    width: 20px;
    margin: 0 4px;
  }

  /* Invite code row on mobile */
  .invite-code-row .invite-verify-btn {
    height: 42px;
    padding: 0 14px;
    font-size: 12px;
    border-radius: var(--radius-md, 8px);
  }

  /* Password strength on mobile */
  .pwd-strength .strength-bar .bar-segment {
    height: 3px;
  }

  .pwd-strength .strength-text {
    font-size: 10px;
  }

  /* Loading spinner on mobile */
  .loading-spinner {
    width: 32px;
    height: 32px;
  }
}

/* Very small screens */
@media (max-width: 360px) {
  .auth-container {
    padding: 8px;
  }

  .auth-header {
    padding: 20px 16px 18px;
  }

  .auth-body {
    padding: 20px 16px 16px;
  }

  .auth-logo {
    width: 160px;
  }

  .form-input {
    height: 40px;
    font-size: 13px;
  }

  .captcha-img-box {
    width: 90px;
    height: 40px;
  }

  .auth-submit-btn {
    height: 42px;
    font-size: 14px;
  }

  .captcha-refresh-link {
    font-size: 11px;
  }
}

/* Landscape phone adjustments */
@media (max-height: 500px) and (orientation: landscape) {
  .auth-container {
    min-height: auto;
    padding: 12px;
    align-items: flex-start;
  }

  .auth-header {
    padding: 20px 28px 16px;
  }

  .auth-logo {
    margin-bottom: 2px;
    width: 174px;
  }

  .auth-subtitle {
    font-size: 12px;
  }

  .auth-body {
    padding: 20px 28px 16px;
  }

  .form-group {
    margin-bottom: 12px;
  }

  .form-input {
    height: 40px;
  }

  .auth-submit-btn {
    height: 42px;
  }

  .auth-agreement {
    margin-top: 10px;
    margin-bottom: 4px;
  }

  .auth-links {
    margin-top: 10px;
    padding-top: 10px;
  }

  .reg-step-bar,
  .repwd-step-bar {
    margin-bottom: 16px;
  }
}

/* High-DPI / Retina display adjustments */
@media (-webkit-min-device-pixel-ratio: 2), (min-resolution: 192dpi) {
  .auth-submit-btn {
    font-weight: 800;
  }

  .form-input {
    border-width: 1.5px;
  }

  .captcha-img-box {
    border-width: 1.5px;
  }
}

/* Print: hide decorative elements */
@media print {
  .auth-decoration,
  .loading-overlay {
    display: none !important;
  }

  .auth-card {
    box-shadow: none;
    border: 1px solid #ccc;
  }

  .auth-submit-btn {
    background: var(--primary, #102b6a);
  }
}

/* ============================================================
   Accessibility: Reduced Motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
  .auth-decoration-1,
  .auth-decoration-2,
  .auth-decoration-3 {
    animation: none;
  }

  .auth-card {
    animation: none;
  }

  .auth-submit-btn::before {
    display: none;
  }

  .auth-submit-btn:hover {
    transform: none;
  }

  .loading-spinner {
    animation-duration: 2s;
  }

  .loading-spinner::after {
    animation: none;
  }

  .error-message {
    animation: none;
  }

  *,
  *::before,
  *::after {
    transition-duration: 0.01ms !important;
  }
}

/* ============================================================
   Dark mode support (system preference)
   ============================================================ */
@media (prefers-color-scheme: dark) {
  body:has(.auth-container) {
    background:
      linear-gradient(120deg, rgba(246, 249, 255, 0.68), rgba(250, 252, 255, 0.58) 44%, rgba(255, 255, 255, 0.76)),
      url("../img/auth-login-bg.png") center / cover no-repeat fixed;
  }

  .auth-card {
    background: #1e293b;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4), 0 8px 24px rgba(0, 0, 0, 0.3);
  }

  .form-input {
    background: #0f172a;
    border-color: #334155;
    color: #e2e8f0;
  }

  .form-input::placeholder {
    color: #64748b;
  }

  .form-input:focus {
    background: #1e293b;
    border-color: var(--primary-light, #1a3f8f);
    box-shadow: 0 0 0 4px rgba(26, 63, 143, 0.3);
  }

  .form-input:hover:not(:focus) {
    border-color: #475569;
  }

  .form-group label {
    color: #e2e8f0;
  }

  .form-group.error .form-input {
    background: #1c1012;
    border-color: var(--red, #e74c3c);
  }

  .auth-agreement {
    color: #94a3b8;
  }

  .auth-links {
    border-top-color: #334155;
  }

  .auth-links a {
    color: #60a5fa;
  }

  .auth-links a:hover {
    color: #93c5fd;
  }

  .auth-agreement a {
    color: #60a5fa;
  }

  .captcha-img-box {
    background: #0f172a;
    border-color: #334155;
  }

  .captcha-refresh-link {
    color: #60a5fa;
  }

  .captcha-refresh-link:hover {
    color: #f59e0b;
  }

  .loading-overlay {
    background: rgba(15, 23, 42, 0.85);
  }

  .loading-spinner {
    border-color: rgba(96, 165, 250, 0.2);
    border-top-color: #60a5fa;
  }

  .loading-spinner::after {
    background: #60a5fa;
  }

  /* Step indicators in dark mode */
  .step-dot {
    background: #1e293b;
    border-color: #334155;
    color: #64748b;
  }

  .reg-step.active .step-dot {
    background: var(--primary-light, #1a3f8f);
    border-color: var(--primary-light, #1a3f8f);
  }

  .reg-step-line {
    background: #334155;
  }

  /* Password strength dark mode */
  .pwd-strength .strength-bar .bar-segment {
    background: #334155;
  }

  .pwd-strength .strength-text {
    color: #94a3b8;
  }

  /* Invite code dark mode */
  .invite-code-row .invite-verify-btn {
    border-color: #60a5fa;
    color: #60a5fa;
  }

  .invite-code-row .invite-verify-btn:hover {
    background: #60a5fa;
    color: #0f172a;
  }
}

/* === Slide Captcha Dialog Override ========================= */
.rvplus-slide-mask {
  background: rgba(8, 18, 42, 0.5) !important;
  backdrop-filter: blur(10px) saturate(1.08) !important;
}

.rvplus-slide-modal {
  width: min(436px, calc(100vw - 32px)) !important;
  border: 1px solid rgba(255, 255, 255, 0.72) !important;
  border-radius: 18px !important;
  overflow: hidden !important;
  background: rgba(255, 255, 255, 0.96) !important;
  box-shadow: 0 28px 70px rgba(16, 43, 106, 0.24), 0 8px 24px rgba(0, 0, 0, 0.1) !important;
}

.rvplus-slide-head {
  padding: 20px 22px 18px !important;
  border-bottom: 0 !important;
  background: linear-gradient(135deg, #102b6a 0%, #1a3f8f 58%, #5b2c8e 100%) !important;
  color: #ffffff !important;
}

.rvplus-slide-title {
  color: #ffffff !important;
  font-size: 19px !important;
  font-weight: 800 !important;
}

.rvplus-slide-subtitle {
  color: rgba(255, 255, 255, 0.76) !important;
  font-size: 13px !important;
}

.rvplus-slide-close {
  width: 32px !important;
  height: 32px !important;
  border-radius: 50% !important;
  color: #102b6a !important;
  background: rgba(255, 255, 255, 0.9) !important;
  line-height: 32px !important;
  transition: transform 0.2s ease, background-color 0.2s ease !important;
}

.rvplus-slide-close:hover {
  transform: rotate(90deg) scale(1.04) !important;
  background: #fdb933 !important;
}

.rvplus-slide-body {
  padding: 20px 22px 14px !important;
}

.rvplus-slide-canvas {
  height: 176px !important;
  border: 1px solid rgba(255, 255, 255, 0.86) !important;
  border-radius: 18px !important;
  background:
    radial-gradient(circle at 16% 22%, rgba(253, 185, 51, 0.5), transparent 20%),
    radial-gradient(circle at 84% 78%, rgba(26, 127, 151, 0.45), transparent 26%),
    linear-gradient(135deg, rgba(16, 43, 106, 0.92), rgba(26, 63, 143, 0.78) 45%, rgba(253, 185, 51, 0.72)),
    linear-gradient(45deg, rgba(255, 255, 255, 0.13) 25%, transparent 25% 50%, rgba(255, 255, 255, 0.13) 50% 75%, transparent 75%) !important;
  background-size: auto, auto, auto, 28px 28px !important;
  box-shadow: inset 0 1px 0 rgba(255, 255, 255, 0.3), 0 16px 34px rgba(16, 43, 106, 0.14) !important;
}

.rvplus-slide-canvas::before {
  inset: 13px !important;
  border-color: rgba(255, 255, 255, 0.22) !important;
  border-radius: 15px !important;
}

.rvplus-slide-target,
.rvplus-slide-piece {
  width: 50px !important;
  height: 50px !important;
  border-radius: 14px !important;
}

.rvplus-slide-piece {
  background:
    radial-gradient(circle at 36% 35%, rgba(255, 255, 255, 0.68), transparent 28%),
    linear-gradient(135deg, #fdb933 0%, #29b7a8 48%, #1a3f8f 100%) !important;
  border: 1px solid rgba(255, 255, 255, 0.78) !important;
  box-shadow: 0 16px 30px rgba(16, 43, 106, 0.28), inset 0 1px 0 rgba(255, 255, 255, 0.35) !important;
}

.rvplus-slide-target {
  border: 2px dashed rgba(255, 255, 255, 0.9) !important;
  background: rgba(255, 255, 255, 0.14) !important;
  box-shadow: inset 0 0 0 999px rgba(16, 43, 106, 0.08), 0 0 0 4px rgba(255, 255, 255, 0.08) !important;
}

.rvplus-slide-track {
  height: 54px !important;
  margin-top: 16px !important;
  border: 1px solid rgba(16, 43, 106, 0.12) !important;
  border-radius: 999px !important;
  background:
    linear-gradient(180deg, #f8fbff, #edf3fb) !important;
  box-shadow: inset 0 1px 4px rgba(16, 43, 106, 0.08), 0 8px 18px rgba(16, 43, 106, 0.08) !important;
}

.rvplus-slide-fill {
  border-radius: 999px !important;
  background: linear-gradient(90deg, rgba(253, 185, 51, 0.95), rgba(26, 127, 151, 0.9), rgba(26, 63, 143, 0.9)) !important;
}

.rvplus-slide-track-text {
  color: #52627d !important;
  font-weight: 600 !important;
  letter-spacing: 0 !important;
}

.rvplus-slide-handle {
  top: 5px !important;
  left: 5px;
  width: 44px !important;
  height: 44px !important;
  display: flex !important;
  align-items: center !important;
  justify-content: center !important;
  border-radius: 50% !important;
  color: transparent !important;
  background: linear-gradient(135deg, #fdb933, #f15a22) !important;
  box-shadow: 0 12px 24px rgba(253, 185, 51, 0.34), inset 0 1px 0 rgba(255, 255, 255, 0.34) !important;
  line-height: 1 !important;
  font-size: 0 !important;
  font-weight: 800 !important;
  text-align: center !important;
  padding: 0 !important;
  transition: transform 0.18s ease, box-shadow 0.18s ease !important;
}

.rvplus-slide-handle::before {
  content: '→';
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #ffffff;
  font-size: 18px;
  line-height: 1;
  font-weight: 800;
  transform: translateY(-0.5px);
}

.rvplus-slide-mask:has(.rvplus-slide-status.is-success) .rvplus-slide-handle::before {
  content: '✓';
  font-size: 19px;
  transform: translateY(-0.5px);
}

.rvplus-slide-handle:hover {
  transform: scale(1.04) !important;
  box-shadow: 0 14px 28px rgba(253, 185, 51, 0.42), inset 0 1px 0 rgba(255, 255, 255, 0.38) !important;
}

.rvplus-slide-status {
  margin-top: 12px !important;
  color: #60708c !important;
}

.rvplus-slide-actions {
  padding: 0 22px 22px !important;
}

.rvplus-slide-action {
  height: 38px !important;
  border-radius: 999px !important;
  padding: 0 18px !important;
  font-weight: 700 !important;
  color: #102b6a !important;
  background: #eef3fb !important;
}

.rvplus-slide-action.is-primary {
  color: #ffffff !important;
  background: linear-gradient(135deg, #102b6a, #1a7f97) !important;
}