:root {
  --color-bg: #f2f7f4;
  --color-surface: #ffffff;
  --color-primary: #00704e;
  --color-primary-dark: #00543a;
  --color-detail-bg: rgba(148, 224, 186, 0.22);
  --color-text: #1a2b23;
  --color-muted: #5f6f68;
  --color-border: #dce6e0;
  --topbar-height: 72px;
  --footer-height: 48px;
  --sidebar-width: 240px;
  --radius: 12px;
  --shadow: 0 1px 3px rgba(0, 0, 0, 0.08), 0 1px 2px rgba(0, 0, 0, 0.06);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
  min-height: 100%;
}

body {
  font-family: "Segoe UI", Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* ===== Top bar ===== */
.topbar {
  height: var(--topbar-height);
  min-height: var(--topbar-height);
  background: var(--color-primary);
  color: #fff;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 16px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow);
}

.topbar-left {
  display: flex;
  align-items: center;
  gap: 10px;
  min-width: 0;
}

.topbar-left .logo {
  height: 52px;
  width: 52px;
  object-fit: cover;
  border-radius: 50%;
  flex-shrink: 0;
}

.topbar-left h1 {
  font-size: 1.8rem;
  font-weight: 600;
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.topbar-right {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-shrink: 0;
}

.icon-btn {
  background: transparent;
  border: none;
  color: #fff;
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: background 0.15s ease;
}

.icon-btn:hover,
.icon-btn:focus-visible {
  background: rgba(255, 255, 255, 0.18);
  outline: none;
}

/* ===== Main ===== */
.main {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 24px;
  max-width: 800px;
  width: 100%;
  margin: 0 auto;
  padding: 20px 16px;
  min-width: 0;
}

.nav-btn {
  text-align: left;
  background: transparent;
  border: none;
  padding: 10px 12px;
  border-radius: 8px;
  font-size: 0.9rem;
  cursor: pointer;
  color: var(--color-text);
  transition: background 0.15s ease;
}

.nav-btn:hover {
  background: var(--color-bg);
}

.nav-btn.active {
  background: var(--color-primary);
  color: #fff;
  font-weight: 600;
}

.status-message {
  font-size: 0.9rem;
  color: var(--color-muted);
}

.status-message.error {
  color: #c53030;
}

.current-weather {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-dark));
  color: #fff;
  border-radius: var(--radius);
  padding: 24px;
  box-shadow: var(--shadow);
}

.current-main {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}

.current-temp {
  display: flex;
  align-items: center;
  gap: 10px;
}

.weather-icon {
  font-size: 3.2rem;
  line-height: 1;
}

.temp-value {
  font-size: 3.2rem;
  font-weight: 700;
}

.current-desc p {
  margin: 0;
}

#currentDesc {
  font-size: 1.1rem;
  font-weight: 600;
  text-transform: capitalize;
}

.muted {
  color: rgba(255, 255, 255, 0.8);
  font-size: 0.9rem;
}

.current-details {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 22px;
}

.detail-card {
  background: var(--color-detail-bg);
  border-radius: 10px;
  padding: 10px 12px;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.detail-label {
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: rgba(255, 255, 255, 0.8);
}

.detail-value {
  font-size: 1rem;
  font-weight: 600;
}

.hourly-section h2,
.daily-section h2 {
  font-size: 1rem;
  margin: 0 0 12px;
  color: var(--color-text);
}

.hourly-list {
  display: flex;
  gap: 12px;
  overflow-x: auto;
  padding-bottom: 8px;
  scroll-snap-type: x proximity;
}

.hour-card {
  flex: 0 0 auto;
  scroll-snap-align: start;
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px 16px;
  min-width: 84px;
  text-align: center;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

.hour-card .hour-time {
  font-size: 0.8rem;
  color: var(--color-muted);
}

.hour-card .hour-icon {
  font-size: 1.6rem;
}

.hour-card .hour-temp {
  font-weight: 600;
}

.daily-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.day-card {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px 18px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
}

.day-card .day-name {
  flex: 1;
  font-weight: 600;
  text-transform: capitalize;
}

.day-card .day-icon {
  font-size: 1.5rem;
}

.day-card .day-temps {
  display: flex;
  gap: 10px;
  min-width: 90px;
  justify-content: flex-end;
  font-variant-numeric: tabular-nums;
}

.day-card .day-max {
  font-weight: 700;
}

.day-card .day-min {
  color: var(--color-muted);
}

/* ===== Footer ===== */
.footer {
  min-height: var(--footer-height);
  background: var(--color-surface);
  border-top: 1px solid var(--color-border);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 10px 16px;
  text-align: center;
}

.footer p {
  margin: 0;
  font-size: 0.8rem;
  color: var(--color-muted);
}

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

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

/* ===== Impostazioni ===== */
.settings-panel {
  background: var(--color-surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.settings-panel h2 {
  margin: 0;
  font-size: 1.2rem;
}

.settings-group {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.settings-label {
  font-size: 0.8rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.03em;
  color: var(--color-muted);
}

.settings-options {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
}

.radio-option {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 10px 16px;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  cursor: pointer;
  font-size: 0.95rem;
  transition: border-color 0.15s ease, background 0.15s ease;
}

.radio-option:has(input:checked) {
  border-color: var(--color-primary);
  background: rgba(0, 112, 78, 0.08);
  font-weight: 600;
}

.radio-option input {
  accent-color: var(--color-primary);
}

.back-btn {
  align-self: flex-start;
  background: var(--color-primary);
  color: #fff;
  padding: 10px 18px;
}

.back-btn:hover {
  background: var(--color-primary-dark);
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .topbar-left h1 {
    font-size: 1.5rem;
  }

  .main {
    padding: 14px 10px;
    gap: 14px;
  }

  .current-weather {
    padding: 18px;
  }

  .weather-icon,
  .temp-value {
    font-size: 2.4rem;
  }

  .current-details {
    grid-template-columns: repeat(2, 1fr);
  }

  .day-card {
    padding: 12px 14px;
  }
}

@media (max-width: 400px) {
  .icon-btn {
    width: 32px;
    height: 32px;
  }
}