:root {
  --bg: #050816;
  --bg-elevated: rgba(15, 23, 42, 0.9);
  --bg-soft: rgba(15, 23, 42, 0.7);
  --accent: #38bdf8;
  --accent-soft: rgba(56, 189, 248, 0.12);
  --accent-strong: rgba(56, 189, 248, 0.25);
  --accent-gradient: linear-gradient(135deg, #38bdf8, #a855f7);
  --text-primary: #e5e7eb;
  --text-muted: #9ca3af;
  --danger: #f97373;
  --danger-soft: rgba(248, 113, 113, 0.16);
  --border-subtle: rgba(148, 163, 184, 0.3);
  --shadow-soft: 0 22px 45px rgba(15, 23, 42, 0.75);
  --radius-lg: 18px;
  --radius-pill: 999px;
  --transition-fast: 180ms ease-out;
  --transition-med: 220ms ease-out;
}

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

html,
body {
  margin: 0;
  padding: 0;
  min-height: 100%;
  font-family: system-ui, -apple-system, BlinkMacSystemFont, "SF Pro Text",
    "Segoe UI", sans-serif;
  color: var(--text-primary);
  background: radial-gradient(circle at top, #1f2937 0, #020617 40%, #020617 100%);
}

body {
  display: flex;
  align-items: stretch;
  justify-content: center;
  padding: 24px 16px;
}

.app {
  width: 100%;
  max-width: 920px;
  margin: auto;
  background: linear-gradient(
      135deg,
      rgba(15, 23, 42, 0.96),
      rgba(2, 6, 23, 0.98)
    );
  border-radius: 28px;
  padding: 28px 24px 20px;
  box-shadow: var(--shadow-soft);
  border: 1px solid rgba(148, 163, 184, 0.25);
  backdrop-filter: blur(24px);
  position: relative;
  overflow: hidden;
}

.app::before,
.app::after {
  content: "";
  position: absolute;
  border-radius: 999px;
  filter: blur(36px);
  opacity: 0.9;
  mix-blend-mode: screen;
  pointer-events: none;
}

.app::before {
  width: 260px;
  height: 260px;
  background: radial-gradient(circle, rgba(56, 189, 248, 0.25), transparent);
  top: -80px;
  right: -60px;
}

.app::after {
  width: 220px;
  height: 220px;
  background: radial-gradient(circle, rgba(168, 85, 247, 0.27), transparent);
  bottom: -120px;
  left: -80px;
}

.app-header {
  position: relative;
  z-index: 1;
  margin-bottom: 22px;
  display: flex;
  justify-content: space-between;
  gap: 16px;
  align-items: flex-start;
}

.app-header h1 {
  margin: 0 0 4px;
  font-size: clamp(1.8rem, 2.1vw + 1.2rem, 2.4rem);
  background: var(--accent-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  letter-spacing: 0.03em;
}

.subtitle {
  margin: 0;
  font-size: 0.9rem;
  color: var(--text-muted);
}

.app-main {
  position: relative;
  z-index: 1;
}

.search-section {
  margin-bottom: 14px;
}

.search-form {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.search-input {
  flex: 1 1 220px;
  min-width: 0;
  padding: 11px 14px;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-subtle);
  background: rgba(15, 23, 42, 0.85);
  color: var(--text-primary);
  font-size: 0.95rem;
  outline: none;
  transition: border-color var(--transition-fast),
    box-shadow var(--transition-fast), background var(--transition-fast),
    transform 120ms ease-out;
}

.search-input::placeholder {
  color: rgba(148, 163, 184, 0.8);
}

.search-input:focus-visible {
  border-color: var(--accent);
  box-shadow: 0 0 0 1px var(--accent-strong);
  background: rgba(15, 23, 42, 0.94);
  transform: translateY(-0.5px);
}

.btn {
  border: none;
  border-radius: var(--radius-pill);
  padding: 10px 18px;
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  white-space: nowrap;
  transition: background var(--transition-med), color var(--transition-med),
    transform 120ms ease-out, box-shadow var(--transition-med),
    border-color var(--transition-med);
}

.btn.primary {
  background-image: var(--accent-gradient);
  color: #0b1120;
  box-shadow: 0 10px 28px rgba(56, 189, 248, 0.35);
}

.btn.primary:hover {
  transform: translateY(-1px);
  box-shadow: 0 16px 38px rgba(56, 189, 248, 0.45);
}

.btn.primary:active {
  transform: translateY(0);
  box-shadow: 0 6px 18px rgba(15, 23, 42, 0.9);
}

.btn.ghost {
  background: rgba(15, 23, 42, 0.7);
  color: var(--text-muted);
  border: 1px solid rgba(148, 163, 184, 0.35);
}

.btn.ghost:hover {
  background: rgba(15, 23, 42, 0.85);
  color: var(--text-primary);
  border-color: rgba(148, 163, 184, 0.8);
}

.btn:disabled {
  opacity: 0.6;
  cursor: default;
  transform: none;
  box-shadow: none;
}

.unit-toggle {
  padding-inline: 10px;
  font-size: 0.75rem;
}

.status-section {
  min-height: 22px;
  margin-bottom: 16px;
}

.status-message {
  margin: 0;
  font-size: 0.86rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 6px;
}

.status-message::before {
  content: "";
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
  animation: pulse 1.1s ease-out infinite;
}

.status-message.error {
  color: var(--danger);
}

.status-message.error::before {
  background: var(--danger);
  box-shadow: 0 0 0 4px var(--danger-soft);
  animation: none;
}

.hidden {
  display: none !important;
}

.weather-card {
  border-radius: 22px;
  background: radial-gradient(
      circle at top left,
      rgba(56, 189, 248, 0.16),
      transparent 55%
    ),
    radial-gradient(
      circle at bottom right,
      rgba(168, 85, 247, 0.16),
      transparent 50%
    ),
    var(--bg-soft);
  border: 1px solid rgba(148, 163, 184, 0.25);
  box-shadow: 0 18px 40px rgba(15, 23, 42, 0.9);
  padding: 18px 18px 16px;
  display: grid;
  gap: 16px;
  animation: cardIn 260ms ease-out;
}

.weather-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.city-name {
  margin: 0;
  font-size: 1.3rem;
  letter-spacing: 0.02em;
}

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

.weather-main {
  display: flex;
  align-items: center;
  gap: 10px;
}

.temperature {
  font-size: 1.9rem;
  font-weight: 600;
}

.weather-body {
  display: grid;
  grid-template-columns: minmax(0, 1.4fr) minmax(0, 1.1fr);
  gap: 16px;
  align-items: center;
}

.weather-primary {
  display: flex;
  align-items: center;
  gap: 14px;
}

.weather-icon {
  width: 70px;
  height: 70px;
  object-fit: contain;
  filter: drop-shadow(0 10px 16px rgba(15, 23, 42, 0.9));
}

.description {
  margin: 0;
  font-size: 1rem;
  text-transform: capitalize;
  color: var(--text-primary);
}

.weather-details {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 10px;
}

.detail {
  padding: 9px 12px;
  border-radius: 14px;
  background: rgba(15, 23, 42, 0.9);
  border: 1px solid rgba(148, 163, 184, 0.28);
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(148, 163, 184, 0.9);
}

.value {
  font-size: 0.94rem;
}

.app-footer {
  position: relative;
  z-index: 1;
  margin-top: 12px;
  display: flex;
  justify-content: flex-end;
}

.app-footer small {
  color: var(--text-muted);
  font-size: 0.75rem;
}

.app-footer a {
  color: var(--accent);
  text-decoration: none;
}

.app-footer a:hover {
  text-decoration: underline;
}

@keyframes pulse {
  0% {
    transform: scale(1);
    opacity: 1;
  }
  60% {
    transform: scale(1.55);
    opacity: 0;
  }
  100% {
    transform: scale(1.55);
    opacity: 0;
  }
}

@keyframes cardIn {
  from {
    opacity: 0;
    transform: translateY(4px) scale(0.99);
  }
  to {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

@media (max-width: 720px) {
  body {
    padding: 18px 10px;
  }

  .app {
    padding: 20px 16px 18px;
    border-radius: 22px;
  }

  .app-header {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }

  .weather-body {
    grid-template-columns: 1fr;
  }

  .weather-primary {
    justify-content: flex-start;
  }

  .weather-card {
    padding: 16px 14px 14px;
  }
}

@media (prefers-reduced-motion: reduce) {
  * {
    scroll-behavior: auto !important;
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}