:root {
  --font-sans: "Inter", "Poppins", "Montserrat", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --color-bg: #050914;
  --color-surface: rgba(255, 255, 255, 0.08);
  --color-surface-soft: rgba(255, 255, 255, 0.04);
  --color-border: rgba(255, 255, 255, 0.16);
  --color-border-strong: rgba(255, 255, 255, 0.26);
  --color-text-primary: #eef3ff;
  --color-text-secondary: rgba(238, 243, 255, 0.7);
  --color-accent: #6d7bff;
  --color-accent-strong: #8c5dff;
  --color-success: #4cd79c;
  --color-warning: #ffb86c;
  --color-error: #ff829f;
  --radius-lg: 28px;
  --radius-md: 18px;
  --radius-sm: 14px;
  --shadow-lg: 0 32px 70px rgba(3, 8, 20, 0.55);
  --shadow-md: 0 18px 40px rgba(3, 8, 20, 0.35);
  --transition-base: 220ms ease;
}

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

html {
  scroll-behavior: smooth;
}

body {
  margin: 0;
  min-height: 100vh;
  padding: 48px 32px;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: radial-gradient(circle at 12% 0%, rgba(102, 124, 255, 0.32), transparent 48%), radial-gradient(circle at 85% 10%, rgba(144, 82, 255, 0.28), transparent 54%), radial-gradient(circle at 50% 90%, rgba(28, 196, 255, 0.22), transparent 56%), var(--color-bg);
  color: var(--color-text-primary);
  font-family: var(--font-sans);
  letter-spacing: -0.01em;
  overflow-x: hidden;
  position: relative;
}

.background {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: -2;
}

.glow {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  filter: blur(150px);
  opacity: 0.55;
  animation: float 18s ease-in-out infinite alternate;
}

.glow-1 {
  top: -210px;
  left: -180px;
  background: linear-gradient(140deg, rgba(108, 125, 255, 0.75), rgba(156, 93, 255, 0.55));
}

.glow-2 {
  bottom: -240px;
  right: -200px;
  background: linear-gradient(160deg, rgba(82, 236, 255, 0.65), rgba(173, 102, 255, 0.5));
  animation-delay: 5s;
}

.grid-overlay {
  position: absolute;
  inset: 0;
  background-image: linear-gradient(rgba(255, 255, 255, 0.06) 1px, transparent 1px), linear-gradient(90deg, rgba(255, 255, 255, 0.05) 1px, transparent 1px);
  background-size: 140px 140px;
  opacity: 0.35;
}

.hero {
  max-width: 620px;
  text-align: center;
  margin-bottom: 42px;
  animation: fadeIn 540ms ease forwards;
  opacity: 0;
  transform: translateY(18px);
}

.badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 6px 16px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid var(--color-border);
  text-transform: uppercase;
  letter-spacing: 0.4px;
  font-size: 13px;
  margin-bottom: 16px;
}

.hero h1 {
  margin: 0;
  font-size: clamp(32px, 4vw, 40px);
  letter-spacing: -0.04em;
}

.subtitle {
  margin: 16px auto 0;
  color: var(--color-text-secondary);
  font-size: 16px;
  line-height: 1.65;
  max-width: 540px;
}

.flash-container {
  width: min(520px, 90vw);
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-bottom: 12px;
}

.flash {
  padding: 12px 16px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.08);
  backdrop-filter: blur(18px);
  font-size: 14px;
  line-height: 1.5;
  box-shadow: var(--shadow-md);
}

.flash-success {
  border-color: rgba(76, 215, 156, 0.35);
  background: rgba(76, 215, 156, 0.16);
  color: var(--color-text-primary);
}

.flash-error {
  border-color: rgba(255, 122, 153, 0.35);
  background: rgba(255, 122, 153, 0.16);
  color: var(--color-text-primary);
}

.auth-area {
  width: 100%;
  max-width: 760px;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: 26px;
}

.controls {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 10px;
  border-radius: var(--radius-md);
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(16px);
}

.toggle-button {
  min-width: 150px;
  padding: 12px 18px;
  border-radius: var(--radius-sm);
  font-weight: 600;
  letter-spacing: 0.02em;
  background: transparent;
  border: 1px solid transparent;
  color: var(--color-text-secondary);
  transition: transform var(--transition-base), background var(--transition-base), color var(--transition-base), border-color var(--transition-base);
}

.toggle-button:hover {
  color: var(--color-text-primary);
  transform: translateY(-2px);
}

.toggle-button.active {
  color: var(--color-text-primary);
  background: linear-gradient(135deg, rgba(109, 123, 255, 0.35), rgba(140, 93, 255, 0.32));
  border-color: rgba(255, 255, 255, 0.22);
  box-shadow: 0 16px 28px rgba(109, 123, 255, 0.28);
}

.panel-surface {
  padding: 36px 0;
  width: 100%;
}

.panel-stack {
  width: min(520px, 94vw);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0;
  perspective: 1200px;
}

.form-panel,
.panel-placeholder {
  padding: 42px 36px 38px;
  border-radius: var(--radius-lg);
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.14);
  backdrop-filter: blur(26px);
  box-shadow: var(--shadow-lg);
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.form-panel {
  display: none;
  flex-direction: column;
  gap: 24px;
  opacity: 0;
  transform: translateY(18px);
}

.form-panel.active {
  display: flex;
  opacity: 1;
  transform: translateY(0);
}

.panel-placeholder {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 15px;
  line-height: 1.6;
  opacity: 1;
  transform: translateY(0);
}

.panel-placeholder.hidden {
  display: none;
}

.panel-header h2 {
  margin: 0 0 10px;
  font-size: 26px;
  letter-spacing: -0.03em;
}

.panel-header p {
  margin: 0;
  color: var(--color-text-secondary);
  font-size: 15px;
}

.form-panel {
  overflow-y: auto;
  overflow-x: hidden;
  scrollbar-width: thin;
  scrollbar-color: rgba(109, 123, 255, 0.4) transparent;
}

.form-panel::-webkit-scrollbar {
  width: 6px;
}

.form-panel::-webkit-scrollbar-thumb {
  background: rgba(109, 123, 255, 0.4);
  border-radius: 999px;
}

.form-panel::-webkit-scrollbar-track {
  background: transparent;
}

.form {
  display: flex;
  flex-direction: column;
  gap: 22px;
  width: min(100%, 420px);
  margin: 0 auto;
}

.link-button {
  margin: 12px auto 0;
  background: none;
  border: none;
  color: var(--color-accent);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: color var(--transition-base), transform var(--transition-base);
}

.link-button:hover {
  color: #9db4ff;
  transform: translateY(-1px);
}

.form label {
  display: flex;
  flex-direction: column;
  gap: 12px;
  padding: 6px 0;
  font-size: 14px;
  color: var(--color-text-secondary);
}

.form label span {
  font-weight: 600;
  letter-spacing: 0.01em;
  color: var(--color-text-primary);
}

.password-strength-group {
  display: flex;
  flex-direction: column;
  gap: 16px;
  padding: 18px 20px;
  border-radius: var(--radius-md);
  border: 1px solid rgba(255, 255, 255, 0.14);
  background: rgba(20, 28, 54, 0.62);
  box-shadow: 0 22px 46px rgba(5, 10, 28, 0.45);
  backdrop-filter: blur(18px);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), background var(--transition-base);
}

.password-strength-group[data-state='medium'] {
  border-color: rgba(255, 184, 108, 0.55);
  box-shadow: 0 26px 54px rgba(255, 163, 72, 0.3);
}

.password-strength-group[data-state='strong'] {
  border-color: rgba(76, 215, 156, 0.55);
  box-shadow: 0 28px 60px rgba(64, 205, 152, 0.32);
  background: rgba(20, 42, 52, 0.58);
}

.password-strength-meter {
  position: relative;
  width: 100%;
  height: 12px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.08);
  overflow: hidden;
}

.password-strength-bar {
  position: absolute;
  inset: 0;
  width: 0%;
  border-radius: inherit;
  background: linear-gradient(135deg, #ff4d6d, #ff758c);
  box-shadow: 0 12px 28px rgba(255, 94, 124, 0.28);
  transition: width 0.3s ease, background 0.3s ease, box-shadow 0.3s ease;
}

.password-rules {
  display: flex;
  flex-direction: column;
  gap: 8px;
  margin: 0;
  padding: 0;
  list-style: none;
  font-size: 13px;
  color: rgba(238, 243, 255, 0.65);
}

.password-rules li {
  display: flex;
  align-items: center;
  gap: 10px;
  line-height: 1.35;
  opacity: 0.75;
  text-decoration-thickness: 2px;
  text-decoration-color: transparent;
  transition: color 0.3s ease, opacity 0.3s ease, text-decoration-color 0.3s ease;
}

.password-rules li::before {
  content: '';
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.24);
  box-shadow: 0 0 0 2px rgba(255, 255, 255, 0.12);
  transition: background 0.3s ease, transform 0.3s ease, box-shadow 0.3s ease;
  flex-shrink: 0;
}

.password-rules li.fulfilled {
  color: var(--color-success);
  opacity: 1;
  text-decoration-line: line-through;
  text-decoration-color: rgba(76, 215, 156, 0.55);
}

.password-rules li.fulfilled::before {
  background: linear-gradient(135deg, #39d592, #4cd79c);
  box-shadow: 0 0 0 3px rgba(76, 215, 156, 0.26);
  transform: scale(1.1);
}

.form label.remember-me {
  position: relative;
  flex-direction: row;
  align-items: center;
  gap: 14px;
  padding: 4px 0;
  font-size: 13px;
  color: var(--color-text-secondary);
  cursor: pointer;
  user-select: none;
}

.form label.remember-me input[type="checkbox"] {
  position: absolute;
  top: 50%;
  left: 0;
  width: 20px;
  height: 20px;
  margin: 0;
  transform: translateY(-50%);
  opacity: 0;
  pointer-events: none;
}

.form label.remember-me .checkbox-indicator {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 20px;
  height: 20px;
  border-radius: 6px;
  border: 1px solid var(--color-border);
  background: rgba(255, 255, 255, 0.08);
  box-shadow: 0 10px 24px rgba(3, 8, 20, 0.4);
  transition: border-color var(--transition-base), box-shadow var(--transition-base), background var(--transition-base), transform var(--transition-base);
}

.form label.remember-me .checkbox-indicator::after {
  content: '';
  width: 8px;
  height: 12px;
  border: 2px solid transparent;
  border-right-color: var(--color-text-primary);
  border-bottom-color: var(--color-text-primary);
  transform: translateY(-1px) rotate(45deg) scale(0.6);
  opacity: 0;
  transition: opacity var(--transition-base), transform var(--transition-base);
}

.form label.remember-me input[type="checkbox"]:checked + .checkbox-indicator {
  border-color: rgba(109, 123, 255, 0.7);
  background: linear-gradient(140deg, rgba(109, 123, 255, 0.4), rgba(140, 93, 255, 0.35));
  box-shadow: 0 12px 30px rgba(109, 123, 255, 0.35);
  transform: translateY(-1px);
}

.form label.remember-me input[type="checkbox"]:checked + .checkbox-indicator::after {
  opacity: 1;
  transform: translateY(-1px) rotate(45deg) scale(1);
}

.form label.remember-me input[type="checkbox"]:focus-visible + .checkbox-indicator {
  border-color: rgba(255, 255, 255, 0.6);
  box-shadow: 0 0 0 4px rgba(109, 123, 255, 0.3);
}

.form label.remember-me span:last-of-type {
  font-weight: 500;
  color: var(--color-text-secondary);
  letter-spacing: 0.01em;
  transition: color var(--transition-base), transform var(--transition-base);
}

.form label.remember-me:hover .checkbox-indicator {
  border-color: rgba(255, 255, 255, 0.32);
  box-shadow: 0 14px 32px rgba(109, 123, 255, 0.28);
}

.form label.remember-me:hover span:last-of-type {
  color: var(--color-text-primary);
  transform: translateY(-1px);
}

body.forgot-modal-open {
  overflow: hidden;
}

.forgot-overlay {
  position: fixed;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: clamp(24px, 6vw, 52px) clamp(16px, 5vw, 48px);
  background: rgba(4, 6, 18, 0.54);
  backdrop-filter: blur(14px);
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
  z-index: 999;
}

.forgot-overlay.open {
  opacity: 1;
  pointer-events: auto;
}

.forgot-overlay .forgot-backdrop {
  position: absolute;
  inset: 0;
}

.forgot-dialog {
  position: relative;
  width: min(420px, 100%);
  padding: clamp(28px, 4vw, 36px);
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(16, 21, 48, 0.82);
  box-shadow: 0 40px 90px rgba(5, 10, 28, 0.65);
  backdrop-filter: blur(22px);
  transform: translateY(18px) scale(0.98);
  transition: transform var(--transition-base), opacity var(--transition-base);
  opacity: 0;
}

.forgot-overlay.open .forgot-dialog {
  opacity: 1;
  transform: translateY(0) scale(1);
}

.forgot-close {
  position: absolute;
  top: 18px;
  right: 18px;
  width: 36px;
  height: 36px;
  border-radius: 999px;
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-text-primary);
  font-size: 20px;
  line-height: 1;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition-base), border-color var(--transition-base), background var(--transition-base);
}

.forgot-close:hover {
  transform: scale(1.05);
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.14);
}

.forgot-header {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-bottom: 24px;
  text-align: left;
}

.forgot-header h3 {
  margin: 0;
  font-size: clamp(20px, 2.6vw, 24px);
  color: var(--color-text-primary);
  letter-spacing: -0.01em;
}

.forgot-header p {
  margin: 0;
  font-size: 14px;
  line-height: 1.6;
  color: rgba(226, 232, 255, 0.78);
}

.forgot-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.forgot-field {
  display: flex;
  flex-direction: column;
  gap: 10px;
  font-size: 13px;
  color: rgba(226, 232, 255, 0.8);
}

.forgot-field span {
  font-weight: 600;
  color: var(--color-text-primary);
}

.forgot-field input {
  width: 100%;
  padding: 16px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-text-primary);
  font-size: 14px;
  transition: border-color var(--transition-base), background var(--transition-base), box-shadow var(--transition-base);
}

.forgot-field input:focus {
  outline: none;
  border-color: rgba(255, 255, 255, 0.35);
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 0 0 4px rgba(109, 123, 255, 0.28);
}

.forgot-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.btn-ghost {
  padding: 13px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.18);
  background: transparent;
  color: var(--color-text-secondary);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: color var(--transition-base), background var(--transition-base), border-color var(--transition-base), transform var(--transition-base);
}

.btn-ghost:hover {
  color: var(--color-text-primary);
  border-color: rgba(255, 255, 255, 0.32);
  background: rgba(255, 255, 255, 0.08);
  transform: translateY(-1px);
}

@media (min-width: 540px) {
  .forgot-actions {
    flex-direction: row;
    justify-content: flex-end;
  }

  .forgot-actions .btn-primary {
    min-width: 180px;
  }
}
.form-actions {
  display: flex;
  flex-direction: column;
  gap: 12px;
  margin-top: 4px;
}

.form input {
  width: 100%;
  padding: 16px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.16);
  background: rgba(255, 255, 255, 0.06);
  color: var(--color-text-primary);
  font-size: 14px;
  transition: border-color var(--transition-base), background var(--transition-base), box-shadow var(--transition-base);
}

.form input::placeholder {
  color: rgba(238, 243, 255, 0.55);
}

.form input:focus {
  outline: none;
  border-color: rgba(255, 255, 255, 0.3);
  background: rgba(255, 255, 255, 0.1);
  box-shadow: 0 0 0 3px rgba(109, 123, 255, 0.18);
}

.form-error {
  padding: 12px 14px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 129, 152, 0.35);
  background: rgba(255, 129, 152, 0.12);
  color: var(--color-text-primary);
  font-size: 13px;
  line-height: 1.45;
}

.field-error {
  font-size: 12px;
  color: var(--color-error);
}

.btn-secondary {
  padding: 14px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.22);
  background: rgba(255, 255, 255, 0.08);
  color: var(--color-text-primary);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  box-shadow: 0 16px 32px rgba(9, 18, 48, 0.26);
}

.btn-secondary:hover {
  transform: translateY(-2px);
  box-shadow: 0 22px 42px rgba(9, 18, 48, 0.32);
}

.btn-primary {
  margin-top: 8px;
  padding: 15px 18px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(255, 255, 255, 0.26);
  background: linear-gradient(135deg, rgba(109, 123, 255, 0.85), rgba(140, 93, 255, 0.85));
  color: #ffffff;
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  box-shadow: 0 24px 48px rgba(109, 123, 255, 0.35);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 30px 60px rgba(109, 123, 255, 0.42);
}

.form .btn-primary {
  width: 100%;
  margin-top: 0;
}

.footer {
  margin-top: 40px;
  text-align: center;
  color: var(--color-text-secondary);
  font-size: 13px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer .link {
  color: var(--color-accent);
  text-decoration: none;
  position: relative;
  align-self: center;
}

.footer .link::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -2px;
  width: 100%;
  height: 1px;
  background: linear-gradient(90deg, var(--color-accent), var(--color-accent-strong));
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 180ms ease;
}

.footer .link:hover::after {
  transform: scaleX(1);
}

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

@keyframes float {
  from {
    transform: translate3d(0, 0, 0) scale(1);
  }
  to {
    transform: translate3d(32px, 52px, 0) scale(1.03);
  }
}

@media (max-width: 900px) {
  body {
    padding: 42px 26px;
  }
  .panel-surface {
    padding: 30px 0;
  }
}

@media (max-width: 720px) {
  .controls {
    flex-direction: column;
    width: min(460px, 100%);
    margin: 0 auto;
  }

  .toggle-button {
    width: 100%;
  }

  .panel-stack {
    width: min(440px, 100%);
    min-height: 400px;
  }

  .form-panel,
  .panel-placeholder {
    padding: 32px 26px 28px;
  }
}

@media (max-width: 540px) {
  body {
    padding: 32px 18px;
  }

  .hero h1 {
    font-size: 30px;
  }

  .subtitle {
    font-size: 15px;
  }

  .panel-stack {
    width: 100%;
  }
}