@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ---------- CSS Variables ---------- */
:root {
  --login-primary: #0d9488;
  --login-primary-hover: #0f766e;
  --login-primary-soft: rgba(13, 148, 136, 0.08);
  --login-gradient-1: #0f172a;
  --login-gradient-2: #1e293b;
  --login-gradient-3: #0f172a;
  --login-card-bg: rgba(255, 255, 255, 0.97);
  --login-card-border: rgba(255, 255, 255, 0.12);
  --login-input-border: #e2e8f0;
  --login-input-focus: #0d9488;
  --login-text: #0f172a;
  --login-text-muted: #64748b;
  --login-shadow: 0 25px 60px rgba(0, 0, 0, 0.35);
  --login-radius: 20px;
  --login-input-radius: 14px;
}

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

html, body {
  height: 100%;
}

body {
  display: grid;
  place-items: center;
  padding: 24px;
  font-family: 'Inter', system-ui, -apple-system, sans-serif;
  color: var(--login-text);
  background: linear-gradient(135deg, var(--login-gradient-1) 0%, var(--login-gradient-2) 50%, var(--login-gradient-3) 100%);
  background-size: 400% 400%;
  animation: gradientShift 12s ease infinite;
  overflow: hidden;
}

/* Animated background particles */
body::before,
body::after {
  content: '';
  position: fixed;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.4;
  z-index: 0;
  pointer-events: none;
}

body::before {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(13, 148, 136, 0.45), transparent 70%);
  top: -10%;
  right: -5%;
  animation: floatOrb1 8s ease-in-out infinite;
}

body::after {
  width: 400px;
  height: 400px;
  background: radial-gradient(circle, rgba(20, 184, 166, 0.35), transparent 70%);
  bottom: -10%;
  left: -5%;
  animation: floatOrb2 10s ease-in-out infinite;
}

@keyframes gradientShift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

@keyframes floatOrb1 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(-40px, 30px) scale(1.1); }
}

@keyframes floatOrb2 {
  0%, 100% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(30px, -40px) scale(1.15); }
}

/* ---------- Login Card ---------- */
.login-card {
  position: relative;
  z-index: 3;
  width: 100%;
  max-width: 420px;
  padding: 48px 36px 40px;
  border-radius: var(--login-radius);
  background: var(--login-card-bg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--login-card-border);
  box-shadow: var(--login-shadow);
  text-align: center;
  animation: cardEntrance 0.6s cubic-bezier(0.16, 1, 0.3, 1) both;
}

@keyframes cardEntrance {
  from {
    opacity: 0;
    transform: translateY(24px) scale(0.96);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

/* Brand icon */
.login-card::before {
  content: '';
  display: block;
  width: 56px;
  height: 56px;
  margin: 0 auto 24px;
  border-radius: 16px;
  background: linear-gradient(135deg, #0d9488, #14b8a6);
  box-shadow: 0 8px 24px rgba(13, 148, 136, 0.35);
}

.login-card > h2 {
  font-size: 26px;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin: 0 0 8px;
  color: var(--login-text);
}

.login-card > h3 {
  color: var(--login-text-muted);
  margin: 0 0 32px;
  font-weight: 500;
  font-size: 14px;
  letter-spacing: 0.1px;
}

/* ---------- Login Form ---------- */
.login-form {
  width: 100%;
  display: grid;
  gap: 14px;
}

.login-form > input,
.login-form > button,
.login-form > select {
  width: 100%;
  height: 52px;
  font-family: inherit;
}

.login-form > input,
.login-form > select {
  border: 1.5px solid var(--login-input-border);
  font-size: 14px;
  padding: 0 16px;
  border-radius: var(--login-input-radius);
  background: #fff;
  color: var(--login-text);
  transition: all 0.2s ease;
  outline: none;
}

.login-form > input::placeholder {
  color: #94a3b8;
}

.login-form > input:hover,
.login-form > select:hover {
  border-color: #cbd5e1;
}

.login-form > input:focus,
.login-form > select:focus {
  border-color: var(--login-input-focus);
  box-shadow: 0 0 0 4px rgba(13, 148, 136, 0.12);
}

/* Select styling */
.login-form > select {
  appearance: none;
  cursor: pointer;
  background: #fff url('data:image/svg+xml;base64,PHN2ZyB3aWR0aD0iMjAiIGhlaWdodD0iMjAiIHZpZXdCb3g9IjAgMCAyMCAyMCIgZmlsbD0ibm9uZSIgeG1sbnM9Imh0dHA6Ly93d3cudzMub3JnLzIwMDAvc3ZnIj4KPHBhdGggZD0iTTUgOEwxMCAxMkwxNSA4IiBzdHJva2U9IiM2NDc0OGIiIHN0cm9rZS13aWR0aD0iMS41IiBzdHJva2UtbGluZWNhcD0icm91bmQiIHN0cm9rZS1saW5lam9pbj0icm91bmQiLz4KPC9zdmc+') no-repeat right 16px center;
  background-size: 14px;
}

.login-form > select option {
  font-size: 14px;
}

/* Submit button */
.login-form > button {
  cursor: pointer;
  padding: 0 16px;
  border-radius: var(--login-input-radius);
  background: linear-gradient(135deg, #0d9488, #0f766e);
  color: #fff;
  border: none;
  font-size: 15px;
  font-weight: 700;
  letter-spacing: 0.5px;
  transition: all 0.25s ease;
  box-shadow: 0 8px 24px rgba(13, 148, 136, 0.3);
  margin-top: 4px;
}

.login-form > button:hover {
  background: linear-gradient(135deg, #0f766e, #115e59);
  box-shadow: 0 12px 28px rgba(13, 148, 136, 0.4);
  transform: translateY(-1px);
}

.login-form > button:active {
  transform: translateY(0);
  box-shadow: 0 4px 12px rgba(13, 148, 136, 0.3);
}

/* Links */
.login-form > a {
  color: var(--login-primary);
  font-size: 13px;
  text-align: left;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.2s ease;
}

.login-form > a:hover {
  color: var(--login-primary-hover);
}

/* ---------- Login Error Message ---------- */
.login-error {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 12px 16px;
  margin-bottom: 20px;
  border-radius: 12px;
  font-size: 13px;
  font-weight: 600;
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
  animation: errorShake 0.4s ease;
  text-align: left;
}

.login-error-icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: #ef4444;
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 12px;
  font-weight: 800;
}

@keyframes errorShake {
  0%, 100% { transform: translateX(0); }
  20% { transform: translateX(-6px); }
  40% { transform: translateX(6px); }
  60% { transform: translateX(-4px); }
  80% { transform: translateX(4px); }
}

/* ---------- Popup Messages (legacy) ---------- */
.popup-message {
  padding: 12px 20px;
  border-radius: 12px;
  font-size: 13px;
  font-weight: 600;
  margin-bottom: 16px;
}

.popup-message.error {
  background: #fef2f2;
  color: #991b1b;
  border: 1px solid #fecaca;
}

.popup-message.success {
  background: #f0fdf4;
  color: #166534;
  border: 1px solid #bbf7d0;
}

/* ---------- Responsive ---------- */
@media (max-width: 500px) {
  body {
    padding: 16px;
  }
  .login-card {
    padding: 36px 24px 32px;
  }
}

@media (min-width: 500px) {
  body {
    padding: 0;
  }
}