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

[data-theme="dark"] {
  color-scheme: dark;
  --bg-gradient: linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
  --card-bg: rgba(255, 255, 255, 0.06);
  --card-border: rgba(255, 255, 255, 0.10);
  --card-shadow: 0 8px 40px rgba(0, 0, 0, 0.4);
  --text: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.55);
  --accent: #c9a84c;
  --accent-hover: #dbb95c;
  --input-bg: rgba(255, 255, 255, 0.07);
  --input-border: rgba(255, 255, 255, 0.12);
  --input-focus-border: #c9a84c;
  --error: #ff6b6b;
  --error-bg: rgba(255, 107, 107, 0.12);
  --toggle-bg: rgba(255, 255, 255, 0.08);
  --toggle-hover: rgba(255, 255, 255, 0.15);
  --blur-amount: 24px;
}

[data-theme="light"] {
  color-scheme: light;
  --bg-gradient: linear-gradient(135deg, #f5f0eb 0%, #e8ddd0 50%, #ddd0be 100%);
  --card-bg: #ffffff;
  --card-border: rgba(0, 0, 0, 0.06);
  --card-shadow: 0 8px 40px rgba(0, 0, 0, 0.08);
  --text: #2d2d2d;
  --text-secondary: rgba(0, 0, 0, 0.45);
  --accent: #5b4a8a;
  --accent-hover: #6b5a9a;
  --input-bg: #f7f5f3;
  --input-border: #e0dbd5;
  --input-focus-border: #5b4a8a;
  --error: #dc3545;
  --error-bg: rgba(220, 53, 69, 0.08);
  --toggle-bg: rgba(0, 0, 0, 0.06);
  --toggle-hover: rgba(0, 0, 0, 0.10);
  --blur-amount: 0px;
}

html, body {
  height: 100%;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
  background: var(--bg-gradient);
  color: var(--text);
  transition: background 0.4s ease, color 0.4s ease;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow: hidden;
}

.view {
  display: none;
}

.view.active {
  display: flex;
  width: 100%;
  height: 100vh;
}

#viewAuth.active {
  align-items: center;
  justify-content: center;
}

.theme-toggle {
  position: fixed;
  top: 20px;
  right: 20px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  border: none;
  background: var(--toggle-bg);
  color: var(--text);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background 0.3s, transform 0.2s;
  z-index: 100;
  backdrop-filter: blur(8px);
}

.theme-toggle:hover {
  background: var(--toggle-hover);
  transform: scale(1.08);
}

.theme-toggle:active {
  transform: scale(0.94);
}

.theme-toggle svg {
  width: 20px;
  height: 20px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

[data-theme="dark"] .theme-toggle .icon-light {
  display: none;
}

[data-theme="dark"] .theme-toggle .icon-dark {
  display: block;
}

[data-theme="light"] .theme-toggle .icon-light {
  display: block;
}

[data-theme="light"] .theme-toggle .icon-dark {
  display: none;
}

.auth-container {
  width: 100%;
  padding: 20px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.auth-card {
  width: 100%;
  max-width: 400px;
  padding: 48px 40px 40px;
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: 20px;
  box-shadow: var(--card-shadow);
  backdrop-filter: blur(var(--blur-amount));
  transition: background 0.4s, border-color 0.4s, box-shadow 0.4s;
}

.auth-header {
  text-align: center;
  margin-bottom: 36px;
}

.logo-icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 16px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo-icon svg {
  width: 100%;
  height: 100%;
}

.auth-header h1 {
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 6px;
  color: var(--text);
}

.auth-header p {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.4;
}

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

.form-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.form-group label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--text-secondary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.form-group input {
  width: 100%;
  padding: 12px 14px;
  background: var(--input-bg);
  border: 1px solid var(--input-border);
  border-radius: 10px;
  color: var(--text);
  font-size: 0.95rem;
  font-family: inherit;
  outline: none;
  transition: border-color 0.25s, background 0.25s;
}

.form-group input::placeholder {
  color: var(--text-secondary);
  opacity: 0.6;
}

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

.password-wrapper {
  position: relative;
}

.password-wrapper input {
  padding-right: 44px;
}

.password-toggle {
  position: absolute;
  right: 8px;
  top: 50%;
  transform: translateY(-50%);
  width: 32px;
  height: 32px;
  border: none;
  border-radius: 8px;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color 0.2s, background 0.2s;
}

.password-toggle:hover {
  color: var(--text);
  background: var(--toggle-bg);
}

.password-toggle svg {
  width: 18px;
  height: 18px;
  fill: none;
  stroke: currentColor;
  stroke-width: 2;
  stroke-linecap: round;
  stroke-linejoin: round;
}

.form-error {
  display: none;
  padding: 10px 14px;
  background: var(--error-bg);
  border: 1px solid transparent;
  border-radius: 10px;
  color: var(--error);
  font-size: 0.85rem;
  line-height: 1.4;
  text-align: center;
}

.form-error.visible {
  display: block;
}

.btn-submit {
  position: relative;
  width: 100%;
  padding: 13px 20px;
  border: none;
  border-radius: 10px;
  background: var(--accent);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  font-family: inherit;
  cursor: pointer;
  transition: background 0.25s, transform 0.15s, opacity 0.25s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

.btn-submit:hover:not(:disabled) {
  background: var(--accent-hover);
  transform: translateY(-1px);
}

.btn-submit:active:not(:disabled) {
  transform: translateY(0);
}

.btn-submit:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

.btn-submit .btn-text {
  transition: opacity 0.2s;
}

.btn-submit.loading .btn-text {
  opacity: 0;
}

.btn-loader {
  display: none;
  position: absolute;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-top-color: #fff;
  border-radius: 50%;
}

.btn-submit.loading .btn-loader {
  display: block;
  animation: spin 0.6s linear infinite;
}

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

@media (max-width: 480px) {
  .auth-card {
    padding: 36px 24px 32px;
    border-radius: 16px;
  }

  .auth-header h1 {
    font-size: 1.5rem;
  }

  .theme-toggle {
    top: 12px;
    right: 12px;
    width: 40px;
    height: 40px;
  }
}