/* =====================================================
   WeatherNow — Premium Weather App Styles
   Author: WeatherNow
   ===================================================== */

/* ── CSS Custom Properties ── */
:root {
  /* Typography */
  --font-main: "Inter", sans-serif;

  /* Spacing */
  --space-xs: 0.4rem;
  --space-sm: 0.75rem;
  --space-md: 1.25rem;
  --space-lg: 2rem;
  --space-xl: 3rem;

  /* Border radius */
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-med: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
  --shadow-md: 0 8px 32px rgba(0, 0, 0, 0.15);
  --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.25);
  --shadow-glow: 0 0 40px rgba(255, 255, 255, 0.12);

  /* Background Gradients */
  --grad-sunny: linear-gradient(135deg, #f5a623 0%, #f7971e 30%, #ff6b35 70%, #e84393 100%);
  --grad-cloudy: linear-gradient(135deg, #485563 0%, #29323c 40%, #485563 100%);
  --grad-rainy: linear-gradient(135deg, #1a1a2e 0%, #16213e 40%, #0f3460 100%);
  --grad-snowy: linear-gradient(135deg, #e0eafc 0%, #cfdef3 50%, #a8c0d6 100%);
  --grad-stormy: linear-gradient(135deg, #0f0c29 0%, #302b63 50%, #24243e 100%);
  --grad-misty: linear-gradient(135deg, #5c6bc0 0%, #7e57c2 50%, #4a148c 100%);

  /* Glass Card */
  --glass-bg: rgba(255, 255, 255, 0.12);
  --glass-border: rgba(255, 255, 255, 0.2);
  --glass-hover: rgba(255, 255, 255, 0.18);

  /* Text */
  --text-primary: #ffffff;
  --text-secondary: rgba(255, 255, 255, 0.75);
  --text-muted: rgba(255, 255, 255, 0.5);
}

/* ── Reset & Base ── */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-main);
  min-height: 100vh;
  background: var(--grad-sunny);
  color: var(--text-primary);
  transition: background var(--transition-slow);
  overflow-x: hidden;
  position: relative;
}

/* ── Background Theme Classes ── */
body.bg-sunny  { background: var(--grad-sunny); }
body.bg-cloudy { background: var(--grad-cloudy); }
body.bg-rainy  { background: var(--grad-rainy); }
body.bg-snowy  { background: var(--grad-snowy); color: #1a1a2e; --text-primary: #1a1a2e; --text-secondary: rgba(26,26,46,0.75); --text-muted: rgba(26,26,46,0.5); --glass-bg: rgba(255,255,255,0.45); --glass-border: rgba(255,255,255,0.6); }
body.bg-stormy { background: var(--grad-stormy); }
body.bg-misty  { background: var(--grad-misty); }

/* ── Animated Particles ── */
.particles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.15);
  animation: floatParticle linear infinite;
}

@keyframes floatParticle {
  0%   { transform: translateY(110vh) scale(0); opacity: 0; }
  10%  { opacity: 1; }
  90%  { opacity: 0.6; }
  100% { transform: translateY(-10vh) scale(1); opacity: 0; }
}

/* ── App Container ── */
.app-container {
  position: relative;
  z-index: 1;
  max-width: 520px;
  margin: 0 auto;
  padding: var(--space-lg) var(--space-md);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
  min-height: 100vh;
}

/* ── Header ── */
.app-header {
  text-align: center;
  margin-bottom: var(--space-xs);
}

.logo {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0.6rem;
  font-size: 1.9rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
}

.logo-icon {
  font-size: 2rem;
  filter: drop-shadow(0 2px 8px rgba(0, 0, 0, 0.3));
  animation: spin 8s linear infinite;
}

@keyframes spin {
  0%   { transform: rotate(0deg);   }
  50%  { transform: rotate(10deg);  }
  100% { transform: rotate(0deg);   }
}

.tagline {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-top: 4px;
  font-weight: 400;
  letter-spacing: 0.5px;
}

/* ── Search Section ── */
.search-section {
  width: 100%;
}

.search-wrapper {
  display: flex;
  align-items: center;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-full);
  padding: 0.5rem 0.5rem 0.5rem 1.2rem;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  box-shadow: var(--shadow-md), var(--shadow-glow);
  transition: box-shadow var(--transition-fast), background var(--transition-fast);
}

.search-wrapper:focus-within {
  box-shadow: var(--shadow-lg), 0 0 0 2px rgba(255, 255, 255, 0.4);
  background: var(--glass-hover);
}

.search-icon {
  color: var(--text-secondary);
  font-size: 0.95rem;
  flex-shrink: 0;
}

.search-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: var(--font-main);
  font-size: 1rem;
  font-weight: 500;
  padding: 0.35rem 0.75rem;
  caret-color: white;
}

.search-input::placeholder {
  color: var(--text-muted);
  font-weight: 400;
}

.search-btn {
  background: rgba(255, 255, 255, 0.9);
  border: none;
  border-radius: var(--radius-full);
  width: 42px;
  height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: #333;
  font-size: 1rem;
  transition: transform var(--transition-fast), background var(--transition-fast), box-shadow var(--transition-fast);
  flex-shrink: 0;
}

.search-btn:hover {
  background: white;
  transform: scale(1.08) translateX(2px);
  box-shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
}

.search-btn:active {
  transform: scale(0.96);
}

/* ── Loading Spinner ── */
.spinner-wrapper {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  padding: var(--space-lg);
}

.spinner {
  position: relative;
  width: 60px;
  height: 60px;
}

.spinner-ring {
  position: absolute;
  inset: 0;
  border-radius: 50%;
  border: 3px solid transparent;
  border-top-color: rgba(255, 255, 255, 0.9);
  animation: spinRing 1.2s linear infinite;
}

.spinner-ring:nth-child(2) {
  inset: 8px;
  border-top-color: rgba(255, 255, 255, 0.6);
  animation-delay: -0.4s;
  animation-duration: 1.6s;
}

.spinner-ring:nth-child(3) {
  inset: 16px;
  border-top-color: rgba(255, 255, 255, 0.35);
  animation-delay: -0.8s;
  animation-duration: 2s;
}

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

.loading-text {
  font-size: 0.9rem;
  color: var(--text-secondary);
  font-weight: 500;
  letter-spacing: 0.3px;
  animation: pulse 1.5s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50%       { opacity: 0.5; }
}

/* ── Error Card ── */
.error-card {
  width: 100%;
  background: rgba(220, 53, 69, 0.2);
  border: 1px solid rgba(220, 53, 69, 0.4);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  text-align: center;
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  animation: slideIn var(--transition-med) both;
}

.error-icon {
  font-size: 2.5rem;
  color: #ff6b6b;
  margin-bottom: 0.5rem;
  display: block;
}

.error-title {
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}

.error-subtitle {
  font-size: 0.875rem;
  color: var(--text-secondary);
}

/* ── Weather Card ── */
.weather-card {
  width: 100%;
  background: var(--glass-bg);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-xl);
  padding: var(--space-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: var(--shadow-lg), var(--shadow-glow);
  animation: slideIn var(--transition-slow) both;
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

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

/* ── Card Top ── */
.card-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.city-name {
  font-size: 2rem;
  font-weight: 800;
  line-height: 1.1;
  letter-spacing: -0.5px;
  text-shadow: 0 2px 8px rgba(0,0,0,0.15);
}

.country-name {
  font-size: 0.9rem;
  color: var(--text-secondary);
  margin-top: 4px;
  display: flex;
  align-items: center;
  gap: 5px;
}

.date-time {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-top: 8px;
  font-weight: 500;
}

/* Weather Icon */
.weather-icon-wrapper {
  flex-shrink: 0;
}

.weather-icon-bg {
  width: 80px;
  height: 80px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid rgba(255, 255, 255, 0.2);
  animation: iconFloat 3s ease-in-out infinite;
}

@keyframes iconFloat {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-6px); }
}

.weather-icon {
  width: 64px;
  height: 64px;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,0.2));
}

/* ── Temperature ── */
.temp-section {
  display: flex;
  align-items: flex-start;
  gap: 2px;
  position: relative;
}

.temperature {
  font-size: 4.5rem;
  font-weight: 800;
  line-height: 1;
  letter-spacing: -3px;
  text-shadow: 0 4px 16px rgba(0,0,0,0.2);
}

.temp-unit {
  font-size: 2rem;
  font-weight: 700;
  margin-top: 10px;
  opacity: 0.8;
}

.feels-like {
  position: absolute;
  bottom: -4px;
  left: 2px;
  font-size: 0.8rem;
  color: var(--text-secondary);
  font-weight: 400;
}

/* ── Condition Badge ── */
.condition-badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: rgba(255, 255, 255, 0.15);
  border: 1px solid rgba(255, 255, 255, 0.25);
  border-radius: var(--radius-full);
  padding: 0.35rem 1rem;
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.3px;
  width: fit-content;
}

/* ── Stats Grid ── */
.stats-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.stat-card {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: 0.9rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.75rem;
  transition: background var(--transition-fast), transform var(--transition-fast);
}

.stat-card:hover {
  background: rgba(255, 255, 255, 0.18);
  transform: translateY(-2px);
}

.stat-icon {
  width: 38px;
  height: 38px;
  background: rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
  flex-shrink: 0;
}

.stat-info {
  display: flex;
  flex-direction: column;
}

.stat-value {
  font-size: 1rem;
  font-weight: 700;
  line-height: 1.2;
}

.stat-label {
  font-size: 0.72rem;
  color: var(--text-muted);
  font-weight: 500;
  margin-top: 2px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

/* ── Sun Times ── */
.sun-times {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-md);
  padding: 0.85rem 1.2rem;
  gap: 1rem;
}

.sun-item {
  flex: 1;
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.sun-item i {
  font-size: 1.5rem;
}

.sun-rise { color: #ffd700; }
.sun-set  { color: #ff8c42; }

.sun-item div {
  display: flex;
  flex-direction: column;
}

.sun-label {
  font-size: 0.7rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  font-weight: 500;
}

.sun-time {
  font-size: 0.95rem;
  font-weight: 700;
  margin-top: 2px;
}

.sun-divider {
  width: 1px;
  height: 36px;
  background: rgba(255, 255, 255, 0.2);
  flex-shrink: 0;
}

/* ── Card Footer ── */
.card-footer {
  display: flex;
  justify-content: space-between;
  font-size: 0.72rem;
  color: var(--text-muted);
  padding-top: var(--space-xs);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
}

/* ── Welcome State ── */
.welcome-state {
  text-align: center;
  padding: var(--space-xl) var(--space-md);
  animation: fadeIn 0.8s ease both;
}

@keyframes fadeIn {
  from { opacity: 0; transform: scale(0.95); }
  to   { opacity: 1; transform: scale(1); }
}

.welcome-icon {
  font-size: 5rem;
  margin-bottom: var(--space-md);
  animation: bounce 2s ease-in-out infinite;
  line-height: 1;
}

@keyframes bounce {
  0%, 100% { transform: translateY(0); }
  50%       { transform: translateY(-10px); }
}

.welcome-state h2 {
  font-size: 1.6rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
}

.welcome-state p {
  font-size: 0.9rem;
  color: var(--text-secondary);
  max-width: 260px;
  margin: 0 auto;
  line-height: 1.6;
}

/* ── Hidden utility ── */
[hidden] { display: none !important; }

/* ── Responsive ── */
@media (max-width: 540px) {
  .app-container {
    padding: var(--space-md) var(--space-sm);
  }

  .weather-card {
    padding: var(--space-md);
    border-radius: var(--radius-lg);
  }

  .city-name {
    font-size: 1.6rem;
  }

  .temperature {
    font-size: 3.5rem;
  }

  .weather-icon-bg {
    width: 68px;
    height: 68px;
  }

  .weather-icon {
    width: 52px;
    height: 52px;
  }

  .card-footer {
    flex-direction: column;
    gap: 4px;
    text-align: center;
  }
}

@media (max-width: 360px) {
  .stats-grid {
    grid-template-columns: 1fr;
  }

  .temperature {
    font-size: 3rem;
  }

  .city-name {
    font-size: 1.4rem;
  }
}