:root {
  --primary: #4f46e5;
  --primary-strong: #9333ea;
  --background: #f4f7fb;
  --card-bg: rgba(255, 255, 255, 0.76);
  --text: #111827;
  --muted: #64748b;
  --border: rgba(148, 163, 184, 0.34);
  --input-bg: rgba(255, 255, 255, 0.82);
  --error: #dc2626;
  --success: #16a34a;
  --warning: #f97316;
  --shadow: 0 8px 32px rgba(15, 23, 42, 0.2);
  color-scheme: light;
}

@media (prefers-color-scheme: dark) {
  :root {
    --background: #0f172a;
    --card-bg: rgba(15, 23, 42, 0.74);
    --text: #f8fafc;
    --muted: #a9b7cc;
    --border: rgba(148, 163, 184, 0.28);
    --input-bg: rgba(15, 23, 42, 0.82);
    --shadow: 0 8px 32px rgba(0, 0, 0, 0.36);
    color-scheme: dark;
  }
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
}

body {
  min-height: 100vh;
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  background:
    radial-gradient(circle at top left, rgba(79, 70, 229, 0.28), transparent 30rem),
    radial-gradient(circle at bottom right, rgba(147, 51, 234, 0.24), transparent 28rem),
    var(--background);
  color: var(--text);
}

button,
input {
  font: inherit;
}

.page-shell {
  display: grid;
  min-height: 100vh;
  place-items: center;
  padding: 24px;
}

.reset-card {
  width: min(100%, 420px);
  padding: 24px;
  border: 1px solid var(--border);
  border-radius: 16px;
  background: var(--card-bg);
  box-shadow: var(--shadow);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.brand-lockup {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 20px;
}

.brand-mark {
  display: grid;
  width: 42px;
  height: 42px;
  place-items: center;
  border-radius: 14px;
  background: linear-gradient(135deg, var(--primary), var(--primary-strong));
  color: #ffffff;
  font-weight: 800;
}

.brand-name {
  margin: 0;
  font-size: 0.88rem;
  font-weight: 800;
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

.brand-subtitle {
  margin: 2px 0 0;
  color: var(--muted);
  font-size: 0.85rem;
}

.gradient-header {
  padding: 22px;
  border-radius: 16px;
  background: linear-gradient(135deg, #4f46e5, #9333ea);
  color: #ffffff;
}

.gradient-header h1 {
  margin: 0;
  font-size: 1.9rem;
  line-height: 1.12;
}

.gradient-header p {
  margin: 8px 0 0;
  color: rgba(255, 255, 255, 0.84);
  line-height: 1.45;
}

.reset-form {
  display: grid;
  gap: 18px;
  margin-top: 22px;
}

.field-group {
  display: grid;
  gap: 8px;
}

.field-group label,
.strength-label {
  font-size: 0.9rem;
  font-weight: 700;
}

.password-control {
  display: flex;
  align-items: center;
  gap: 8px;
  border: 1px solid var(--border);
  border-radius: 14px;
  background: var(--input-bg);
  transition: border-color 160ms ease, box-shadow 160ms ease, transform 160ms ease;
}

.password-control:focus-within {
  border-color: rgba(79, 70, 229, 0.78);
  box-shadow: 0 0 0 4px rgba(79, 70, 229, 0.16);
}

.password-control input {
  width: 100%;
  min-width: 0;
  border: 0;
  outline: 0;
  padding: 14px 0 14px 14px;
  background: transparent;
  color: var(--text);
}

.password-control input::placeholder {
  color: color-mix(in srgb, var(--muted), transparent 22%);
}

.toggle-password {
  min-width: 58px;
  margin-right: 6px;
  border: 0;
  border-radius: 10px;
  padding: 8px 10px;
  background: transparent;
  color: var(--primary);
  cursor: pointer;
  font-weight: 800;
  transition: background 160ms ease, transform 160ms ease;
}

.toggle-password:hover,
.toggle-password:focus-visible {
  background: rgba(79, 70, 229, 0.12);
}

.toggle-password:active {
  transform: scale(0.96);
}

.field-help,
.field-message {
  min-height: 18px;
  margin: 0;
  font-size: 0.82rem;
}

.field-help {
  color: var(--muted);
}

.field-message.error {
  color: var(--error);
  font-weight: 700;
}

.field-message.success {
  color: var(--success);
  font-weight: 700;
}

.strength {
  height: 8px;
  overflow: hidden;
  border-radius: 999px;
  background: rgba(148, 163, 184, 0.28);
}

.strength-bar {
  width: 0;
  height: 100%;
  border-radius: inherit;
  background: transparent;
  transition: width 240ms ease, background-color 240ms ease;
}

.strength-bar.weak {
  width: 33%;
  background: var(--error);
}

.strength-bar.medium {
  width: 66%;
  background: var(--warning);
}

.strength-bar.strong {
  width: 100%;
  background: var(--success);
}

.message {
  display: none;
  margin-top: 16px;
  border-radius: 14px;
  padding: 12px 14px;
  font-size: 0.9rem;
  font-weight: 700;
  line-height: 1.4;
}

.message.error {
  display: block;
  background: var(--error);
  color: #ffffff;
  animation: slideIn 220ms ease, shake 320ms ease 70ms;
}

.message.success {
  display: block;
  background: var(--success);
  color: #ffffff;
  animation: slideIn 220ms ease;
}

.submit-button,
.return-button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 48px;
  border: 0;
  border-radius: 14px;
  padding: 0 18px;
  background: linear-gradient(135deg, var(--primary), var(--primary-strong));
  color: #ffffff;
  cursor: pointer;
  font-weight: 800;
  text-decoration: none;
  position: relative;
  box-shadow: 0 14px 28px rgba(79, 70, 229, 0.28);
  transition: box-shadow 180ms ease, filter 180ms ease, transform 180ms ease;
}

.submit-button:hover:not(:disabled),
.return-button:hover {
  filter: brightness(1.04);
  transform: translateY(-1px) scale(1.01);
  box-shadow: 0 18px 34px rgba(79, 70, 229, 0.34);
}

.submit-button:disabled {
  cursor: not-allowed;
  opacity: 0.55;
  box-shadow: none;
}

.submit-button.loading .button-label {
  opacity: 0;
}

.submit-button.loading .spinner {
  display: inline-block;
}

.spinner {
  display: none;
  position: absolute;
  width: 20px;
  height: 20px;
  border: 3px solid rgba(255, 255, 255, 0.42);
  border-top-color: #ffffff;
  border-radius: 50%;
  animation: spin 700ms linear infinite;
}

.success-panel {
  display: grid;
  justify-items: center;
  gap: 14px;
  padding: 34px 8px 8px;
  text-align: center;
}

.success-panel[hidden] {
  display: none;
}

.success-icon {
  display: grid;
  width: 70px;
  height: 70px;
  place-items: center;
  border-radius: 999px;
  background: rgba(22, 163, 74, 0.14);
  color: var(--success);
  font-size: 2.3rem;
  font-weight: 900;
  animation: successPop 420ms cubic-bezier(0.2, 0.85, 0.3, 1.25);
}

.success-panel h2 {
  margin: 4px 0 0;
  font-size: 1.55rem;
}

.success-panel p {
  margin: 0;
  max-width: 28ch;
  color: var(--muted);
  line-height: 1.5;
}

.return-button {
  margin-top: 8px;
}

.fade-in {
  opacity: 0;
  animation: fadeIn 0.4s forwards;
}

.fade-out {
  opacity: 1;
  animation: fadeOut 0.4s forwards;
}

@media (min-width: 720px) {
  .page-shell {
    padding: 40px;
  }

  .reset-card {
    padding: 28px;
  }
}

@keyframes fadeIn {
  from {
    opacity: 0;
    transform: translateY(8px);
  }

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

@keyframes fadeOut {
  from {
    opacity: 1;
    transform: translateY(0);
  }

  to {
    opacity: 0;
    transform: translateY(-8px);
  }
}

@keyframes slideIn {
  from {
    opacity: 0;
    transform: translateY(-6px);
  }

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

@keyframes shake {
  0%,
  100% {
    transform: translateX(0);
  }

  25% {
    transform: translateX(-4px);
  }

  75% {
    transform: translateX(4px);
  }
}

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

@keyframes successPop {
  0% {
    transform: scale(0.84);
  }

  70% {
    transform: scale(1.08);
  }

  100% {
    transform: scale(1);
  }
}