:root {
  --bg-overlay: linear-gradient(
    165deg,
    rgba(15, 23, 42, 0.5) 0%,
    rgba(6, 95, 70, 0.35) 50%,
    rgba(15, 23, 42, 0.55) 100%
  );
  --glass: rgba(255, 255, 255, 0.14);
  --glass-strong: rgba(255, 255, 255, 0.22);
  --glass-border: rgba(255, 255, 255, 0.38);
  --glass-input: rgba(255, 255, 255, 0.1);
  --text: #f8fafc;
  --text-soft: rgba(248, 250, 252, 0.82);
  --muted: rgba(226, 232, 240, 0.65);
  --accent: #38bdf8;
  --accent-end: #6366f1;
  --accent-hover: #0ea5e9;
  --error: #fca5a5;
  --error-bg: rgba(127, 29, 29, 0.45);
  --radius: 24px;
  --radius-sm: 14px;
  --shadow: 0 32px 64px -16px rgba(0, 0, 0, 0.45);
}

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

html {
  -webkit-text-size-adjust: 100%;
}

body {
  margin: 0;
  min-height: 100vh;
  font-family: "DM Sans", system-ui, sans-serif;
  color: var(--text);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

.page {
  position: relative;
  min-height: 100vh;
  display: grid;
  place-items: center;
  padding: 1.5rem;
  background-color: #0f172a;
  background-image: url("/images/background.jpg");
  background-position: center;
  background-size: cover;
  background-repeat: no-repeat;
  background-attachment: fixed;
}

.page__overlay {
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background: var(--bg-overlay);
}

.page > .card {
  position: relative;
  z-index: 1;
}

.card {
  width: 100%;
  max-width: 440px;
  padding: 2.5rem 2.25rem 2rem;
  background: var(--glass);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  backdrop-filter: blur(22px) saturate(160%);
  -webkit-backdrop-filter: blur(22px) saturate(160%);
  border: 1px solid var(--glass-border);
  animation: rise 0.55s cubic-bezier(0.22, 1, 0.36, 1);
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(
    145deg,
    rgba(255, 255, 255, 0.55) 0%,
    rgba(255, 255, 255, 0.05) 40%,
    rgba(255, 255, 255, 0.2) 100%
  );
  -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  pointer-events: none;
}

@keyframes rise {
  from {
    opacity: 0;
    transform: translateY(20px) scale(0.98);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.card__brand {
  display: flex;
  align-items: center;
  gap: 1.125rem;
  margin-bottom: 2rem;
  padding-bottom: 1.75rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
}

.card__logo {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  font-weight: 700;
  font-size: 1.35rem;
  color: #fff;
  background: linear-gradient(135deg, var(--accent), var(--accent-end));
  border-radius: 16px;
  box-shadow: 0 8px 24px rgba(56, 189, 248, 0.35);
}

.card h1 {
  margin: 0;
  font-size: 1.625rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text);
}

.card__subtitle {
  margin: 0.35rem 0 0;
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--muted);
}

.card__welcome {
  margin: 0 0 1.5rem;
  font-size: 0.9375rem;
  line-height: 1.5;
  color: var(--text-soft);
}

.form {
  display: flex;
  flex-direction: column;
  gap: 1.125rem;
}

.field label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
  color: var(--muted);
}

.field input,
.field select {
  width: 100%;
  padding: 0.875rem 1rem;
  font: inherit;
  font-size: 0.9375rem;
  color: var(--text);
  border: 1px solid rgba(255, 255, 255, 0.2);
  border-radius: var(--radius-sm);
  background: var(--glass-input);
  backdrop-filter: blur(8px);
  transition: border-color 0.2s, background 0.2s, box-shadow 0.2s;
}

.field select {
  cursor: pointer;
  color-scheme: dark;
  background-color: rgba(15, 23, 42, 0.72);
}

.field select option {
  background-color: #1e293b;
  color: #f8fafc;
}

.field select option:checked,
.field select option:hover {
  background-color: #334155;
  color: #fff;
}

.field select:disabled {
  opacity: 0.65;
  cursor: not-allowed;
}

.field-hint {
  margin: 0.35rem 0 0;
  font-size: 0.75rem;
  color: var(--muted);
}

.field input::placeholder {
  color: rgba(226, 232, 240, 0.45);
}

.field input:focus,
.field select:focus {
  outline: none;
  border-color: rgba(56, 189, 248, 0.65);
  background: rgba(255, 255, 255, 0.14);
  box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.18);
}

.error {
  margin: 0;
  font-size: 0.875rem;
  color: var(--error);
  padding: 0.75rem 0.875rem;
  background: var(--error-bg);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(252, 165, 165, 0.35);
  backdrop-filter: blur(8px);
}

.btn {
  position: relative;
  margin-top: 0.5rem;
  padding: 0.9375rem 1rem;
  font: inherit;
  font-size: 1rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  color: #fff;
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-end) 100%);
  border: none;
  border-radius: var(--radius-sm);
  cursor: pointer;
  box-shadow: 0 12px 28px rgba(99, 102, 241, 0.35);
  transition: transform 0.15s, box-shadow 0.2s, filter 0.2s;
}

.btn:hover:not(:disabled) {
  filter: brightness(1.06);
  box-shadow: 0 14px 32px rgba(99, 102, 241, 0.45);
}

.btn:active:not(:disabled) {
  transform: scale(0.98);
}

.btn:disabled {
  opacity: 0.7;
  cursor: wait;
}

.btn__spinner {
  position: absolute;
  inset: 0;
  margin: auto;
  width: 22px;
  height: 22px;
  border: 2px solid rgba(255, 255, 255, 0.35);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

.footer-note {
  margin: 1.75rem 0 0;
  padding-top: 1.25rem;
  font-size: 0.6875rem;
  color: var(--muted);
  text-align: center;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-note code {
  font-size: 0.65rem;
  color: var(--text-soft);
  background: rgba(255, 255, 255, 0.1);
  padding: 0.15rem 0.4rem;
  border-radius: 6px;
  border: 1px solid rgba(255, 255, 255, 0.12);
}

@media (max-width: 480px) {
  .page {
    padding: 1rem;
    align-items: flex-start;
    padding-top: max(1rem, env(safe-area-inset-top));
    padding-bottom: max(1rem, env(safe-area-inset-bottom));
  }

  .card {
    padding: 2rem 1.25rem 1.75rem;
    border-radius: 20px;
    max-width: 100%;
  }
}