/* ===== THEME VARIABLES (with RGB for transparency) ===== */
:root {
  --bg: #0b0f17;
  --panel: #101827;
  --panel-2: #0f172a;
  --text: #e5e7eb;
  --muted: #9ca3af;
  --border: rgba(255, 255, 255, 0.08);
  --dark: #0b0b0b;
  --accent: #ff3d6e;

  /* RGB values for glass effects */
  --panel-rgb: 16, 24, 39;       /* = #101827 */
  --accent-rgb: 255, 61, 110;    /* = #ff3d6e */

  --shadow: 0 20px 45px rgba(0, 0, 0, 0.35);
}

* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: "Bell MT", serif;
  background: radial-gradient(1200px 600px at 15% 10%, rgba(255, 61, 110, 0.12), transparent 60%),
              radial-gradient(1000px 600px at 90% 30%, rgba(59, 130, 246, 0.10), transparent 60%),
              var(--bg);
  color: var(--text);
  height: 100dvh;
  margin: 0;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: background-color 0.25s, color 0.25s;
  padding: 20px;
}

/* ===== LIGHT THEME ===== */
body.light-theme {
  --bg: #ffffff;
  --panel: #f9fafb;
  --panel-2: #ffffff;
  --text: #111827;
  --muted: #6b7280;
  --border: rgba(0, 0, 0, 0.08);
  --panel-rgb: 255, 255, 255;    /* white base */
  --accent-rgb: 255, 61, 110;

   background: radial-gradient(900px 500px at 20% 10%, rgba(255, 61, 110, 0.10), transparent 60%),
              radial-gradient(900px 500px at 80% 35%, rgba(59, 130, 246, 0.08), transparent 60%),
              var(--bg); 
}

/* ===== SIMPLE TOGGLE BUTTON ===== */
.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  background: rgba(var(--panel-rgb), 0.3);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(var(--panel-rgb), 0.2);
  color: var(--text);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  cursor: pointer;
  z-index: 9999;
  box-shadow: var(--shadow);
  transition: 0.2s;
}
.theme-toggle:hover {
  background: rgba(var(--accent-rgb), 0.2);
  border-color: rgba(var(--accent-rgb), 0.3);
}

/* ===== GLASS LOGIN POPUP – THEMED ===== */
.glass-popup {
  width: 100%;
  max-width: 520px;
  padding: 40px 35px;
  border-radius: 24px;

  /* Glass effect using theme RGB variables + opacity */
  backdrop-filter: blur(10px) saturate(180%);
  -webkit-backdrop-filter: blur(30px) saturate(180%);
  /* background: rgba(var(--panel-rgb), 0.02);    */
  border: 1px solid rgba(var(--panel-rgb), 0.15);

  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.2);
  animation: fadeIn 0.4s ease-in-out;
}

.glass-popup h2 {
  text-align: center;
  color: var(--text);
  margin-bottom: 25px;
  font-weight: 600;
  letter-spacing: 0.5px;
  text-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.glass-popup .subhead {
  text-align: center;
  font-size: 14px;
  color: var(--text);
  margin-bottom: 25px;
}

.glass-popup .form-group {
  margin-bottom: 20px;
}

.glass-popup label {
  display: block;
  font-size: 13px;
  color: var(--text);
  margin-bottom: 6px;
  font-weight: 400;
}

.glass-popup input {
  width: 100%;
  padding: 14px 16px;
  border-radius: 14px;
  border: 1px solid rgba(var(--panel-rgb), 0.25);
  background: rgba(var(--panel-rgb), 0.1);
  color: var(--text);
  font-size: 15px;
  outline: none;
  transition: 0.3s;
}

.glass-popup input::placeholder {
  color: var(--text);
  font-weight: 300;
}

.glass-popup input:focus {
  border-color: var(--accent);
  background: rgba(var(--panel-rgb), 0.15);
}

.glass-popup .btn {
  width: 100%;
  padding: 14px;
  border: none;
  border-radius: 14px;
  background: rgba(var(--accent-rgb), 0.25);
  color: #ffffff;
  font-weight: 600;
  font-size: 16px;
  cursor: pointer;
  transition: 0.3s;
  backdrop-filter: blur(5px);
  border: 1px solid rgba(var(--accent-rgb), 0.3);
  margin-top: 10px;
}

.glass-popup .btn:hover {
  background: rgba(var(--accent-rgb), 0.35);
  border-color: rgba(var(--accent-rgb), 0.5);
}

.glass-popup .error-message, .glass-popup .error {
  background: rgba(255, 70, 70, 0.2);
  backdrop-filter: blur(8px);
  color: #fff;
  padding: 10px 12px;
  border-radius: 10px;
  margin-bottom: 18px;
  font-size: 13px;
  border-left: 3px solid #ff4d4d;
  text-align: center;
}

.glass-popup .message {
  background: rgba(0, 123, 255, 0.2);
  backdrop-filter: blur(8px);
  color: #fff;
  padding: 10px 12px;
  border-radius: 10px;
  margin-bottom: 18px;
  font-size: 13px;
  border-left: 3px solid #3399ff;
}

.glass-popup .footer-text {
  margin-top: 22px;
  text-align: center;
  font-size: 12px;
  color: var(--text);
  font-weight: 300;
}

.glass-popup .login-link, .glass-popup .resend-link {
  text-align: center;
  margin-top: 22px;
  font-size: 14px;
  color: var(--text);
}

.glass-popup .login-link a, .glass-popup .resend-link a {
  color: var(--text);
  text-decoration: none;
  font-weight: 500;
  transition: 0.2s;
}

.glass-popup .login-link a:hover, .glass-popup .resend-link a:hover {
  text-decoration: underline;
  opacity: 0.9;
}

/* OTP specific */
.glass-popup .otp-input {
  letter-spacing: 8px;
  text-align: center;
  font-weight: 600;
  font-size: 20px;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

/* Responsive */
@media (max-width: 480px) {
  .glass-popup {
    padding: 30px 20px;
    border-radius: 20px;
  }
  .glass-popup h2 {
    font-size: 24px;
  }
  .glass-popup input {
    padding: 12px 14px;
    font-size: 14px;
  }
  .glass-popup .btn {
    padding: 12px;
    font-size: 15px;
  }
}

/* ===== BACK BUTTON STYLES ===== */
.back-btn-container {
  width: 100%;
  max-width: 420px;
  margin-bottom: 15px;
  display: flex;
  justify-content: flex-start;
}

.back-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 8px 16px;
  background: rgba(var(--panel-rgb), 0.3);
  backdrop-filter: blur(10px);
  border: 1px solid rgba(var(--panel-rgb), 0.15);
  border-radius: 50px;
  color: var(--text);
  text-decoration: none;
  font-size: 0.85rem;
  font-weight: 500;
  transition: 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.back-btn:hover {
  background: rgba(var(--accent-rgb), 0.15);
  border-color: rgba(var(--accent-rgb), 0.3);
  transform: translateX(-5px);
  color: var(--accent);
}

.back-btn i {
  font-size: 1.1rem;
}

/* ===== GOOGLE BUTTON & DIVIDER ===== */
.divider {
  display: flex;
  align-items: center;
  gap: 12px;
  margin: 18px 0 14px;
  color: var(--muted);
  font-size: 12px;
}
.divider::before,
.divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: rgba(255, 255, 255, 0.1);
}

.btn-google {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  width: 100%;
  padding: 13px;
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: var(--text);
  font-size: 15px;
  font-weight: 500;
  text-decoration: none;
  cursor: pointer;
  backdrop-filter: blur(5px);
  transition: background 0.25s, border-color 0.25s, transform 0.15s;
}
.btn-google:hover {
  background: rgba(255, 255, 255, 0.11);
  border-color: rgba(255, 255, 255, 0.22);
  transform: translateY(-1px);
}
.btn-google svg {
  flex-shrink: 0;
}