:root {
  --bg-color: #0f172a;
  --card-bg: rgba(30, 41, 59, 0.8);
  --card-border: rgba(255, 255, 255, 0.1);
  --text-main: #f8fafc;
  --text-muted: #94a3b8;
  --primary: #6366f1;
  --primary-hover: #4f46e5;
  --input-bg: #0f172a;
  --input-border: #334155;
  --input-focus: #818cf8;
  --danger: #ef4444;
  --danger-bg: rgba(239, 68, 68, 0.15);
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
}

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

body {
  background: radial-gradient(circle at top, #1e293b 0%, #0f172a 100%);
  color: var(--text-main);
  font-family: var(--font-family);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 24px;
}

.login-container {
  width: 100%;
  max-width: 420px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 16px;
  padding: 36px 32px;
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.text-center {
  text-align: center;
}

.logo-header {
  text-align: center;
  margin-bottom: 24px;
}

.logo-icon {
  width: 44px;
  height: 44px;
  margin: 0 auto 12px;
  display: block;
}

.logo-title {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.logo-subtitle {
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 4px;
}

.page-text {
  color: var(--text-muted);
  font-size: 14px;
  line-height: 1.6;
  margin-bottom: 24px;
}

.alert-box {
  display: none;
  background: var(--danger-bg);
  border: 1px solid var(--danger);
  color: #fca5a5;
  padding: 10px 14px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 18px;
}

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

.form-label {
  display: block;
  font-size: 13px;
  font-weight: 500;
  margin-bottom: 6px;
  color: var(--text-muted);
}

.form-input {
  width: 100%;
  padding: 10px 14px;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 8px;
  color: var(--text-main);
  font-size: 14px;
  outline: none;
}

.form-input:focus {
  border-color: var(--input-focus);
}

.form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 13px;
  margin-bottom: 22px;
}

.remember-label {
  display: flex;
  align-items: center;
  gap: 6px;
  color: var(--text-muted);
  cursor: pointer;
}

.form-link {
  color: #818cf8;
  text-decoration: none;
}

.form-link:hover {
  text-decoration: underline;
}

.submit-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  padding: 12px 16px;
  background: var(--primary);
  color: #ffffff;
  border: none;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  transition: background 0.15s ease;
}

.submit-btn:hover {
  background: var(--primary-hover);
  color: #ffffff;
}

.submit-btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.footer {
  margin-top: 28px;
  text-align: center;
  font-size: 12px;
  color: var(--text-muted);
}

.footer-links {
  margin-top: 8px;
  display: flex;
  justify-content: center;
  gap: 16px;
}

.footer-links a {
  color: var(--text-muted);
  text-decoration: none;
}

.footer-links a:hover {
  color: var(--text-main);
}