/* ============================================
   ATMOS — Weather App Design System
   Retro-Futuristic Dark Theme
   ============================================ */

:root {
  --bg-primary: #080B14;
  --bg-secondary: #0D1220;
  --bg-card: rgba(255, 255, 255, 0.04);
  --bg-card-hover: rgba(255, 255, 255, 0.07);
  --border-glass: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(0, 245, 212, 0.3);

  --cyan: #00F5D4;
  --cyan-dim: rgba(0, 245, 212, 0.15);
  --lime: #CCFF00;
  --lime-dim: rgba(204, 255, 0, 0.12);
  --magenta: #FF3CAC;
  --orange: #FF6B35;
  --gold: #FFD700;

  --text-primary: #F0F4FF;
  --text-secondary: rgba(240, 244, 255, 0.55);
  --text-muted: rgba(240, 244, 255, 0.3);

  --font-display: 'Outfit', sans-serif;
  --font-body: 'Outfit', sans-serif;

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  --shadow-glow-cyan: 0 0 30px rgba(0, 245, 212, 0.15);
  --shadow-glow-lime: 0 0 30px rgba(204, 255, 0, 0.12);
  --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============ RESET & BASE ============ */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

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

/* ============ BACKGROUND CANVAS ============ */
#bgCanvas {
  position: fixed;
  inset: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
  pointer-events: none;
}

.weather-overlay {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  transition: background 2s ease;
}

.app-wrapper {
  position: relative;
  z-index: 2;
  min-height: 100vh;
}

/* ============ GLASSMORPHISM CARDS ============ */
.card-glass {
  background: var(--bg-card);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
}

.card-glass::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: inherit;
  background: linear-gradient(135deg, rgba(255,255,255,0.05) 0%, transparent 60%);
  pointer-events: none;
}

.card-glass:hover {
  background: var(--bg-card-hover);
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow-cyan);
  transform: translateY(-2px);
}

/* ============ HEADER ============ */
.app-header {
  background: rgba(8, 11, 20, 0.8);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-glass);
  position: sticky;
  top: 0;
  z-index: 100;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.brand-icon {
  color: var(--cyan);
  font-size: 1.4rem;
  animation: pulse-glow 2s ease-in-out infinite;
}

.brand-name {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 900;
  letter-spacing: 0.15em;
  background: linear-gradient(135deg, var(--cyan), var(--lime));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.brand-tag {
  font-size: 0.6rem;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--magenta);
  background: rgba(255, 60, 172, 0.15);
  border: 1px solid rgba(255, 60, 172, 0.3);
  padding: 2px 6px;
  border-radius: 4px;
  animation: blink 1.5s step-end infinite;
}

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.live-time {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.05em;
}

.btn-unit {
  background: var(--cyan-dim);
  border: 1px solid var(--border-glow);
  color: var(--cyan);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 6px 14px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  letter-spacing: 0.05em;
}

.btn-unit:hover {
  background: var(--cyan);
  color: var(--bg-primary);
  box-shadow: 0 0 20px rgba(0, 245, 212, 0.4);
}

.btn-locate {
  background: var(--lime-dim);
  border: 1px solid rgba(204, 255, 0, 0.3);
  color: var(--lime);
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1rem;
}

.btn-locate:hover {
  background: var(--lime);
  color: var(--bg-primary);
  box-shadow: 0 0 20px rgba(204, 255, 0, 0.4);
}

/* ============ SEARCH ============ */
.search-section {
  padding: 2rem 0 1rem;
}

.search-wrapper {
  position: relative;
  max-width: 680px;
  margin: 0 auto;
}

.search-box {
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-xl);
  padding: 0.5rem 0.5rem 0.5rem 1.25rem;
  gap: 0.75rem;
  transition: var(--transition);
}

.search-box:focus-within {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow-cyan), inset 0 0 20px rgba(0, 245, 212, 0.03);
}

.search-icon {
  color: var(--text-muted);
  font-size: 1rem;
  flex-shrink: 0;
}

.search-input {
  flex: 1;
  background: transparent;
  border: none;
  outline: none;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
}

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

.search-btn {
  background: linear-gradient(135deg, var(--cyan), var(--lime));
  border: none;
  color: var(--bg-primary);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.8rem;
  letter-spacing: 0.1em;
  padding: 10px 20px;
  border-radius: 999px;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.4rem;
  white-space: nowrap;
}

.search-btn:hover {
  transform: scale(1.05);
  box-shadow: 0 0 25px rgba(0, 245, 212, 0.5);
}

/* Suggestions Dropdown */
.suggestions-dropdown {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  right: 0;
  background: rgba(13, 18, 32, 0.97);
  backdrop-filter: blur(20px);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  overflow: hidden;
  z-index: 200;
  display: none;
}

.suggestion-item {
  padding: 0.75rem 1.25rem;
  cursor: pointer;
  transition: var(--transition);
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.9rem;
  color: var(--text-secondary);
  border-bottom: 1px solid var(--border-glass);
}

.suggestion-item:last-child { border-bottom: none; }

.suggestion-item:hover {
  background: var(--cyan-dim);
  color: var(--cyan);
}

.suggestion-item i { color: var(--text-muted); }

/* ============ LOADING STATE ============ */
.loading-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 5rem 2rem;
  gap: 1.5rem;
}

.loader-ring {
  width: 60px;
  height: 60px;
  border: 3px solid var(--border-glass);
  border-top-color: var(--cyan);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loader-text {
  font-family: var(--font-display);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.25em;
  color: var(--cyan);
  animation: pulse-opacity 1s ease-in-out infinite;
}

@keyframes pulse-opacity {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

/* ============ ERROR STATE ============ */
.error-state {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
  gap: 1rem;
}

.error-icon {
  font-size: 3rem;
  color: var(--magenta);
  animation: shake 0.5s ease;
}

@keyframes shake {
  0%, 100% { transform: translateX(0); }
  25% { transform: translateX(-8px); }
  75% { transform: translateX(8px); }
}

.error-msg {
  font-size: 1rem;
  color: var(--text-secondary);
  text-align: center;
}

/* ============ WELCOME STATE ============ */
.welcome-state {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 4rem 2rem;
  min-height: 60vh;
}

.welcome-content {
  text-align: center;
  max-width: 520px;
}

.welcome-icon {
  font-size: 5rem;
  margin-bottom: 1.5rem;
  background: linear-gradient(135deg, var(--cyan), var(--lime));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  animation: float 3s ease-in-out infinite;
}

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}

.welcome-title {
  font-family: var(--font-display);
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  margin-bottom: 0.75rem;
  background: linear-gradient(135deg, var(--text-primary), var(--text-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.welcome-sub {
  color: var(--text-secondary);
  font-size: 1rem;
  line-height: 1.6;
  margin-bottom: 2rem;
}

.welcome-features {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
  justify-content: center;
}

.welcome-features span {
  display: flex;
  align-items: center;
  gap: 0.4rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.05em;
  color: var(--cyan);
  background: var(--cyan-dim);
  border: 1px solid var(--border-glow);
  padding: 6px 14px;
  border-radius: 999px;
}

/* ============ CURRENT WEATHER ============ */
.current-weather-section { padding-top: 1.5rem; }

.card-main-temp {
  height: 100%;
  background: linear-gradient(135deg, rgba(0, 245, 212, 0.06) 0%, rgba(204, 255, 0, 0.03) 100%);
  border-color: rgba(0, 245, 212, 0.15);
}

.location-row {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 1rem;
}

.city-name {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 4vw, 2.4rem);
  font-weight: 800;
  letter-spacing: -0.02em;
  line-height: 1.1;
  background: linear-gradient(135deg, var(--text-primary), var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.country-name {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  margin-top: 0.25rem;
  letter-spacing: 0.05em;
}

.weather-icon-large {
  font-size: 4rem;
  line-height: 1;
  filter: drop-shadow(0 0 20px rgba(255, 215, 0, 0.4));
  animation: float 4s ease-in-out infinite;
}

.temp-display {
  display: flex;
  align-items: flex-start;
  gap: 0.25rem;
  margin: 0.5rem 0;
}

.temp-value {
  font-family: var(--font-display);
  font-size: clamp(4rem, 10vw, 7rem);
  font-weight: 900;
  line-height: 1;
  letter-spacing: -0.04em;
  background: linear-gradient(135deg, #FFFFFF, var(--cyan));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.temp-unit-label {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 300;
  color: var(--text-secondary);
  margin-top: 0.75rem;
}

.weather-desc {
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-secondary);
  text-transform: capitalize;
  letter-spacing: 0.05em;
  margin-bottom: 0.75rem;
}

.feels-like-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 1rem;
}

.feels-like-row strong { color: var(--text-primary); }

.last-updated {
  font-size: 0.75rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.temp-range-bar {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-size: 0.85rem;
  font-weight: 600;
}

.temp-min { color: #74B9FF; }
.temp-max { color: #FF7675; }

.range-track {
  flex: 1;
  height: 4px;
  background: rgba(255,255,255,0.1);
  border-radius: 2px;
  overflow: hidden;
}

.range-indicator {
  height: 100%;
  background: linear-gradient(90deg, #74B9FF, #FFD700, #FF7675);
  border-radius: 2px;
  width: 60%;
  transition: width 1s ease;
}

/* ============ STAT CARDS ============ */
.card-stat {
  text-align: center;
  padding: 1.25rem 1rem;
  height: 100%;
}

.stat-icon {
  font-size: 1.4rem;
  margin-bottom: 0.5rem;
  color: var(--cyan);
}

.stat-value {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.2;
}

.stat-label {
  font-size: 0.7rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-top: 0.25rem;
}

.stat-bar {
  height: 3px;
  background: rgba(255,255,255,0.08);
  border-radius: 2px;
  margin-top: 0.5rem;
  overflow: hidden;
}

.stat-bar-fill {
  height: 100%;
  background: linear-gradient(90deg, var(--cyan), var(--lime));
  border-radius: 2px;
  transition: width 1s ease;
}

.wind-dir {
  font-size: 1.2rem;
  color: var(--lime);
  margin-top: 0.4rem;
  transition: transform 0.5s ease;
}

/* ============ SECTION HEADERS ============ */
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 1rem;
}

.section-title {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  color: var(--text-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.section-title i { color: var(--cyan); }

.section-tag {
  font-size: 0.65rem;
  font-weight: 700;
  letter-spacing: 0.15em;
  color: var(--lime);
  background: var(--lime-dim);
  border: 1px solid rgba(204, 255, 0, 0.2);
  padding: 3px 8px;
  border-radius: 4px;
}

/* ============ HOURLY FORECAST ============ */
.hourly-scroll-wrapper {
  overflow-x: auto;
  padding-bottom: 0.5rem;
  scrollbar-width: thin;
  scrollbar-color: var(--border-glow) transparent;
}

.hourly-scroll-wrapper::-webkit-scrollbar { height: 4px; }
.hourly-scroll-wrapper::-webkit-scrollbar-track { background: transparent; }
.hourly-scroll-wrapper::-webkit-scrollbar-thumb {
  background: var(--border-glow);
  border-radius: 2px;
}

.hourly-track {
  display: flex;
  gap: 0.75rem;
  padding: 0.25rem 0.25rem 0.5rem;
  min-width: max-content;
}

.hourly-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 1rem 1.25rem;
  text-align: center;
  min-width: 90px;
  transition: var(--transition);
  cursor: default;
  position: relative;
  overflow: hidden;
}

.hourly-card::before {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, var(--cyan), var(--lime));
  transform: scaleX(0);
  transition: transform 0.3s ease;
}

.hourly-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-4px);
  box-shadow: var(--shadow-glow-cyan);
}

.hourly-card:hover::before { transform: scaleX(1); }

.hourly-card.current-hour {
  border-color: rgba(0, 245, 212, 0.4);
  background: rgba(0, 245, 212, 0.08);
}

.hourly-time {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.hourly-icon { font-size: 1.6rem; margin-bottom: 0.5rem; }

.hourly-temp {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.hourly-pop {
  font-size: 0.7rem;
  color: #74B9FF;
  margin-top: 0.25rem;
}

/* ============ DAILY FORECAST ============ */
.daily-forecast-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 0.75rem;
}

@media (max-width: 768px) {
  .daily-forecast-grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 480px) {
  .daily-forecast-grid { grid-template-columns: repeat(2, 1fr); }
}

.daily-card {
  background: var(--bg-card);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-md);
  padding: 1.25rem 1rem;
  text-align: center;
  transition: var(--transition);
}

.daily-card:hover {
  border-color: var(--border-glow);
  transform: translateY(-3px);
  box-shadow: var(--shadow-glow-cyan);
}

.daily-day {
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--text-muted);
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.daily-icon { font-size: 2rem; margin-bottom: 0.5rem; }

.daily-desc {
  font-size: 0.7rem;
  color: var(--text-secondary);
  margin-bottom: 0.5rem;
  text-transform: capitalize;
}

.daily-temps {
  display: flex;
  justify-content: center;
  gap: 0.5rem;
  font-size: 0.85rem;
  font-weight: 600;
}

.daily-high { color: #FF7675; }
.daily-low { color: #74B9FF; }

.daily-pop {
  font-size: 0.7rem;
  color: #74B9FF;
  margin-top: 0.25rem;
}

/* ============ AIR QUALITY ============ */
.aqi-badge {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  padding: 4px 12px;
  border-radius: 999px;
}

.aqi-good { background: rgba(0, 245, 100, 0.15); color: #00F564; border: 1px solid rgba(0, 245, 100, 0.3); }
.aqi-moderate { background: rgba(255, 215, 0, 0.15); color: #FFD700; border: 1px solid rgba(255, 215, 0, 0.3); }
.aqi-unhealthy { background: rgba(255, 107, 53, 0.15); color: #FF6B35; border: 1px solid rgba(255, 107, 53, 0.3); }
.aqi-hazardous { background: rgba(255, 60, 172, 0.15); color: #FF3CAC; border: 1px solid rgba(255, 60, 172, 0.3); }

.aqi-meter { margin: 0.5rem 0; }

.aqi-track {
  height: 8px;
  background: linear-gradient(90deg, #00F564, #FFD700, #FF6B35, #FF3CAC);
  border-radius: 4px;
  position: relative;
  margin-bottom: 0.5rem;
}

.aqi-indicator {
  position: absolute;
  top: 50%;
  transform: translate(-50%, -50%);
  width: 16px;
  height: 16px;
  background: white;
  border-radius: 50%;
  box-shadow: 0 0 10px rgba(255,255,255,0.5);
  transition: left 1s ease;
}

.aqi-scale {
  display: flex;
  justify-content: space-between;
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

.aqi-detail-item {
  background: rgba(255,255,255,0.03);
  border: 1px solid var(--border-glass);
  border-radius: var(--radius-sm);
  padding: 0.5rem;
  text-align: center;
}

.aqi-detail-val {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--text-primary);
}

.aqi-detail-label {
  font-size: 0.65rem;
  color: var(--text-muted);
  letter-spacing: 0.08em;
  text-transform: uppercase;
}

/* ============ SUN ARC ============ */
.sun-arc-container {
  padding: 0.5rem 0;
}

.sun-arc-svg {
  width: 100%;
  height: auto;
}

.sun-dot-glow {
  filter: drop-shadow(0 0 8px #FFD700);
  animation: pulse-glow 2s ease-in-out infinite;
}

@keyframes pulse-glow {
  0%, 100% { filter: drop-shadow(0 0 8px rgba(255, 215, 0, 0.6)); }
  50% { filter: drop-shadow(0 0 20px rgba(255, 215, 0, 1)); }
}

/* ============ ANIMATIONS ============ */
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.weather-content {
  animation: fadeIn 0.5s ease;
}

.card-glass, .hourly-card, .daily-card {
  animation: fadeInUp 0.4s ease both;
}

/* Stagger children */
.card-stat:nth-child(1) { animation-delay: 0.05s; }
.card-stat:nth-child(2) { animation-delay: 0.1s; }
.card-stat:nth-child(3) { animation-delay: 0.15s; }
.card-stat:nth-child(4) { animation-delay: 0.2s; }
.card-stat:nth-child(5) { animation-delay: 0.25s; }
.card-stat:nth-child(6) { animation-delay: 0.3s; }
.card-stat:nth-child(7) { animation-delay: 0.35s; }
.card-stat:nth-child(8) { animation-delay: 0.4s; }

/* ============ RESPONSIVE ============ */
@media (max-width: 576px) {
  .search-btn span { display: none; }
  .search-btn { padding: 10px 14px; }
  .brand-name { font-size: 1.2rem; }
  .live-time { display: none; }
  .card-glass { padding: 1rem; }
  .temp-value { font-size: 5rem; }
}

/* ============ SCROLLBAR ============ */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-primary); }
::-webkit-scrollbar-thumb { background: var(--border-glass); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--border-glow); }

/* ============ SELECTION ============ */
::selection { background: var(--cyan-dim); color: var(--cyan); }