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

:root {
  --bg: #0f1117;
  --surface: #181b24;
  --border: #2a2f3d;
  --text: #f4f6fb;
  --muted: #9aa3b5;
  --accent: #6c8cff;
  --accent-hover: #5476ff;
  --error: #ff6b7a;
  --radius: 14px;
  --shadow: 0 24px 60px rgba(0, 0, 0, 0.45);
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: Inter, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(circle at top left, rgba(108, 140, 255, 0.18), transparent 40%),
    radial-gradient(circle at bottom right, rgba(108, 140, 255, 0.1), transparent 35%),
    var(--bg);
}

.page {
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
}

.card {
  width: min(100%, 420px);
  padding: 2rem;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: calc(var(--radius) + 4px);
  box-shadow: var(--shadow);
}

.card__header {
  text-align: center;
  margin-bottom: 1.75rem;
}

.logo {
  width: 3rem;
  height: 3rem;
  margin: 0 auto 1rem;
  display: grid;
  place-items: center;
  border-radius: 12px;
  background: linear-gradient(135deg, var(--accent), #9b7bff);
  color: white;
  font-size: 1.25rem;
}

h1 {
  margin: 0 0 0.35rem;
  font-size: 1.75rem;
  font-weight: 700;
  letter-spacing: -0.02em;
}

.subtitle {
  margin: 0;
  color: var(--muted);
  font-size: 0.95rem;
}

.form {
  display: grid;
  gap: 1.1rem;
}

.field label {
  display: block;
  margin-bottom: 0.45rem;
  font-size: 0.875rem;
  font-weight: 500;
}

.field__label-row {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.45rem;
}

.field__label-row label {
  margin-bottom: 0;
}

input[type="email"],
input[type="password"],
input[type="text"] {
  width: 100%;
  padding: 0.75rem 0.9rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  background: #12151d;
  color: var(--text);
  font: inherit;
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

input::placeholder {
  color: #6b7385;
}

input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(108, 140, 255, 0.2);
}

input.invalid {
  border-color: var(--error);
}

.password-wrap {
  position: relative;
}

.password-wrap input {
  padding-right: 4.5rem;
}

.toggle-password {
  position: absolute;
  top: 50%;
  right: 0.5rem;
  transform: translateY(-50%);
  border: none;
  background: transparent;
  color: var(--muted);
  font: inherit;
  font-size: 0.8rem;
  cursor: pointer;
  padding: 0.35rem 0.5rem;
  border-radius: 8px;
}

.toggle-password:hover {
  color: var(--text);
  background: rgba(255, 255, 255, 0.05);
}

.checkbox {
  display: flex;
  align-items: center;
  gap: 0.55rem;
  font-size: 0.875rem;
  color: var(--muted);
  cursor: pointer;
}

.checkbox input {
  width: 1rem;
  height: 1rem;
  accent-color: var(--accent);
}

.btn {
  border: none;
  border-radius: var(--radius);
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, transform 0.1s ease;
}

.btn--primary {
  margin-top: 0.25rem;
  padding: 0.85rem 1rem;
  background: var(--accent);
  color: white;
}

.btn--primary:hover {
  background: var(--accent-hover);
}

.btn--primary:active {
  transform: scale(0.99);
}

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

.link {
  color: var(--accent);
  text-decoration: none;
  font-size: 0.875rem;
}

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

.footer-text {
  margin: 1.5rem 0 0;
  text-align: center;
  color: var(--muted);
  font-size: 0.875rem;
}

.error {
  min-height: 1.1rem;
  margin: 0.35rem 0 0;
  font-size: 0.8rem;
  color: var(--error);
}

.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(1rem);
  padding: 0.75rem 1.1rem;
  border-radius: 999px;
  background: #222735;
  border: 1px solid var(--border);
  color: var(--text);
  font-size: 0.875rem;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.toast.visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}