/* ====== DESIGN TOKENS ====== */
:root {
  /* Base colors */
  --bg-deep: #06060f;
  --bg-glass: rgba(18, 18, 40, 0.55);
  --bg-glass-hover: rgba(22, 22, 50, 0.65);
  --bg-glass-border: rgba(255, 255, 255, 0.08);
  --bg-glass-border-hover: rgba(255, 255, 255, 0.16);

  /* Text */
  --text-primary: #f0f0f5;
  --text-secondary: #b0b0c8;
  --text-tertiary: #6b6b88;
  --text-accent: #ffffff;

  /* Accent — dynamic via JS */
  --accent: #5b9cf5;
  --accent-glow: rgba(91, 156, 245, 0.35);
  --accent-soft: rgba(91, 156, 245, 0.15);
  --accent-warm: #f5a65b;

  /* Gradients */
  --gradient-card: linear-gradient(
    135deg,
    rgba(255, 255, 255, 0.04) 0%,
    rgba(255, 255, 255, 0.01) 100%
  );

  /* Spacing */
  --space-xs: 4px;
  --space-sm: 8px;
  --space-md: 16px;
  --space-lg: 24px;
  --space-xl: 32px;
  --space-2xl: 48px;

  /* Radii */
  --radius-md: 16px;
  --radius-lg: 22px;
  --radius-xl: 28px;
  --radius-full: 50%;

  /* Shadows */
  --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
  --shadow-md: 0 8px 24px rgba(0, 0, 0, 0.4);

  /* Typography */
  --font-display:
    "SF Pro Display", "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-body:
    "SF Pro Text", "Inter", "Segoe UI", system-ui, -apple-system, sans-serif;
  --font-mono:
    "SF Mono", "Fira Code", "Cascadia Code", "JetBrains Mono", monospace;

  /* Transitions */
  --ease-out: cubic-bezier(0.22, 0.61, 0.36, 1);
  --ease-spring: cubic-bezier(0.34, 1.56, 0.64, 1);
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --duration-slow: 500ms;

  /* Font sizes */
  --text-hero: clamp(4rem, 8vw, 7rem);
  --text-h1: clamp(2rem, 4vw, 3rem);
  --text-h2: clamp(1.4rem, 2.5vw, 2rem);
  --text-h3: 1.2rem;
  --text-body: 0.95rem;
  --text-sm: 0.8rem;
  --text-xs: 0.7rem;
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  text-rendering: optimizeLegibility;
}

body {
  font-family: var(--font-body);
  background: var(--bg-deep);
  color: var(--text-primary);
  min-height: 100vh;
  overflow-x: hidden;
  line-height: 1.5;
  letter-spacing: -0.01em;
  transition: background-color var(--duration-slow) var(--ease-out);
}

/* ====== ANIMATED GRADIENT BACKGROUND LAYERS ====== */
.bg-layer {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.7;
}

.bg-layer-1 {
  background:
    radial-gradient(
      ellipse at 20% 20%,
      rgba(91, 140, 245, 0.12) 0%,
      transparent 55%
    ),
    radial-gradient(
      ellipse at 75% 60%,
      rgba(140, 80, 230, 0.1) 0%,
      transparent 55%
    ),
    radial-gradient(
      ellipse at 50% 90%,
      rgba(245, 130, 60, 0.06) 0%,
      transparent 50%
    );
  animation: bgPulse 12s ease-in-out infinite;
}

.bg-layer-2 {
  background:
    radial-gradient(
      ellipse at 60% 30%,
      rgba(100, 200, 240, 0.08) 0%,
      transparent 50%
    ),
    radial-gradient(
      ellipse at 30% 70%,
      rgba(160, 100, 240, 0.07) 0%,
      transparent 50%
    );
  animation: bgPulse 16s ease-in-out infinite reverse;
}

.bg-grid {
  position: fixed;
  inset: 0;
  pointer-events: none;
  z-index: 0;
  opacity: 0.03;
  background-image:
    linear-gradient(rgba(255, 255, 255, 0.5) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255, 255, 255, 0.5) 1px, transparent 1px);
  background-size: 60px 60px;
}

@keyframes bgPulse {
  0%,
  100% {
    opacity: 0.6;
    transform: scale(1);
  }

  33% {
    opacity: 0.8;
    transform: scale(1.04);
  }

  66% {
    opacity: 0.55;
    transform: scale(0.97);
  }
}

/* Particle canvas */
#particles-canvas {
  position: fixed;
  inset: 0;
  z-index: 1;
  pointer-events: none;
}

/* ====== TOAST NOTIFICATIONS ====== */
.toast-container {
  position: fixed;
  top: 20px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 10000;
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  pointer-events: none;
}

.toast {
  pointer-events: auto;
  background: rgba(30, 20, 20, 0.9);
  border: 1.5px solid rgba(255, 80, 80, 0.4);
  border-radius: var(--radius-md);
  padding: var(--space-md) var(--space-lg);
  color: #fca5a5;
  font-size: var(--text-sm);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  animation:
    toastIn 0.4s var(--ease-spring) forwards,
    toastOut 0.35s var(--ease-out) 3.5s forwards;
  max-width: 380px;
  box-shadow: 0 8px 32px rgba(255, 0, 0, 0.2);
}

@keyframes toastIn {
  from {
    opacity: 0;
    transform: translateY(-100%);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes toastOut {
  from {
    opacity: 1;
    transform: translateY(0);
  }
  to {
    opacity: 0;
    transform: translateY(-100%);
  }
}

/* ====== LAYOUT ====== */
.app-container {
  position: relative;
  z-index: 2;
  max-width: 1400px;
  margin: 0 auto;
  padding: var(--space-md);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
  min-height: 100vh;
}

/* ====== API KEY MODAL STYLES ====== */
.key-modal-overlay {
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at 30% 20%, var(--bg-deep), #020208);
  z-index: 20000;
  display: flex;
  align-items: center;
  justify-content: center;
  backdrop-filter: blur(12px);
  transition: opacity var(--duration-normal) var(--ease-out);
}

.key-modal-card {
  background: var(--bg-glass);
  backdrop-filter: blur(24px);
  border: 1.5px solid var(--bg-glass-border);
  border-radius: var(--radius-xl);
  max-width: 520px;
  width: 90%;
  padding: var(--space-2xl) var(--space-xl);
  box-shadow:
    var(--shadow-md),
    0 0 0 1px rgba(255, 255, 255, 0.03);
  text-align: center;
  animation: modalFloatUp 0.5s var(--ease-spring);
  position: relative;
  overflow: hidden;
}

.key-modal-card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--gradient-card);
  pointer-events: none;
  border-radius: inherit;
}

@keyframes modalFloatUp {
  0% {
    opacity: 0;
    transform: translateY(30px) scale(0.96);
  }
  100% {
    opacity: 1;
    transform: translateY(0) scale(1);
  }
}

.key-modal-icon {
  font-size: 58px;
  margin-bottom: var(--space-md);
  filter: drop-shadow(0 0 12px var(--accent-glow));
  animation: iconPulse 2s ease-in-out infinite;
}

@keyframes iconPulse {
  0%,
  100% {
    filter: drop-shadow(0 0 8px var(--accent-glow));
  }
  50% {
    filter: drop-shadow(0 0 20px var(--accent-glow));
  }
}

.key-modal-title {
  font-family: var(--font-display);
  font-size: var(--text-h2);
  font-weight: 700;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--text-accent), #9ac8ff);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
  margin-bottom: var(--space-sm);
}

.key-modal-desc {
  font-family: var(--font-body);
  color: var(--text-secondary);
  font-size: var(--text-body);
  margin-bottom: var(--space-xl);
  line-height: 1.5;
}

.key-input-group {
  margin-bottom: var(--space-lg);
  text-align: left;
}

.key-input-group label {
  display: block;
  font-family: var(--font-body);
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-tertiary);
  margin-bottom: var(--space-sm);
}

.key-input {
  width: 100%;
  background: rgba(0, 0, 0, 0.4);
  border: 1.5px solid var(--bg-glass-border);
  border-radius: var(--radius-xl);
  padding: 14px 20px;
  font-family: var(--font-mono, "SF Mono", monospace);
  font-size: var(--text-sm);
  color: var(--text-primary);
  transition: all var(--duration-fast) var(--ease-out);
}

.key-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
  background: rgba(0, 0, 0, 0.6);
}

.key-input::placeholder {
  color: var(--text-tertiary);
  font-family: var(--font-body);
  font-size: var(--text-sm);
}

.key-error {
  color: #ffa6a6;
  font-size: var(--text-sm);
  margin-top: var(--space-sm);
  background: rgba(255, 60, 60, 0.1);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-xl);
  display: inline-block;
  backdrop-filter: blur(4px);
  border: 1px solid rgba(255, 80, 80, 0.2);
}

.btn-group {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  margin-top: var(--space-sm);
}

.btn-primary {
  background: var(--accent);
  border: none;
  padding: 12px 28px;
  border-radius: var(--radius-xl);
  font-family: var(--font-body);
  font-weight: 600;
  font-size: var(--text-sm);
  color: white;
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  box-shadow: 0 4px 14px var(--accent-glow);
}

.btn-primary:hover {
  background: #4186e0;
  transform: scale(1.02);
  box-shadow: 0 8px 20px var(--accent-glow);
}

.btn-primary:active {
  transform: scale(0.98);
}

.btn-primary:disabled {
  opacity: 0.7;
  cursor: not-allowed;
  transform: none;
}

.btn-secondary {
  background: transparent;
  border: 1.5px solid var(--bg-glass-border);
  padding: 12px 20px;
  border-radius: var(--radius-xl);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--text-secondary);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--text-accent);
  background: var(--accent-soft);
}

.info-hint {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  margin-top: var(--space-xl);
  background: rgba(255, 255, 255, 0.02);
  padding: var(--space-md);
  border-radius: var(--radius-lg);
  text-align: center;
  border: 1px solid var(--bg-glass-border);
}

.info-hint a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--duration-fast);
}

.info-hint a:hover {
  color: var(--text-accent);
  text-decoration: underline;
}

.spinner-small {
  display: inline-block;
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255, 255, 255, 0.2);
  border-top-color: white;
  border-radius: var(--radius-full);
  animation: spin 0.6s linear infinite;
  margin-right: var(--space-sm);
  vertical-align: middle;
}

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

@media (max-width: 768px) {
  .key-modal-card {
    padding: var(--space-xl) var(--space-lg);
    margin: var(--space-md);
  }

  .key-modal-icon {
    font-size: 48px;
  }

  .key-modal-title {
    font-size: 1.6rem;
  }

  .key-modal-desc {
    font-size: var(--text-sm);
  }

  .btn-primary,
  .btn-secondary {
    padding: 10px 20px;
  }
}

@media (max-width: 480px) {
  .key-modal-card {
    padding: var(--space-lg) var(--space-md);
  }

  .key-modal-icon {
    font-size: 42px;
  }

  .btn-group {
    flex-direction: column;
  }

  .btn-primary,
  .btn-secondary {
    width: 100%;
  }
}

/* ====== LOADING SCREEN ====== */
.loading-screen {
  position: fixed;
  inset: 0;
  z-index: 9999;
  background: var(--bg-deep);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-lg);
  transition:
    opacity 0.4s var(--ease-out),
    visibility 0.4s;
}

.loading-screen.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loading-logo {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  background: linear-gradient(135deg, var(--accent), #c084fc);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  animation: logoShimmer 2s ease-in-out infinite;
}

@keyframes logoShimmer {
  0%,
  100% {
    filter: brightness(1);
  }

  50% {
    filter: brightness(1.5);
  }
}

.loading-spinner {
  width: 44px;
  height: 44px;
  border: 3px solid rgba(255, 255, 255, 0.1);
  border-top-color: var(--accent);
  border-radius: var(--radius-full);
  animation: spin 0.8s linear infinite;
}

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

.loading-text {
  color: var(--text-tertiary);
  font-size: var(--text-sm);
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

/* ====== NAVIGATION BAR ====== */
.nav-bar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  flex-wrap: wrap;
  padding: var(--space-sm) 0;
}

.nav-brand {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--text-accent);
  white-space: nowrap;
  display: flex;
  align-items: center;
  gap: var(--space-xs);
}

.nav-brand-dot {
  width: 8px;
  height: 8px;
  border-radius: var(--radius-full);
  background: var(--accent);
  box-shadow: 0 0 12px var(--accent-glow);
  animation: dotPulse 2s ease-in-out infinite;
}

@keyframes dotPulse {
  0%,
  100% {
    box-shadow: 0 0 8px var(--accent-glow);
  }

  50% {
    box-shadow:
      0 0 20px var(--accent-glow),
      0 0 40px var(--accent-glow);
  }
}

.nav-controls {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

/* Search bar */
.search-wrapper {
  position: relative;
  flex: 1;
  min-width: 200px;
  max-width: 380px;
}

.search-input {
  width: 100%;
  padding: 12px 44px 12px 18px;
  border-radius: var(--radius-xl);
  border: 1.5px solid var(--bg-glass-border);
  background: var(--bg-glass);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: var(--text-body);
  outline: none;
  transition: all var(--duration-normal) var(--ease-out);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

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

.search-input:focus {
  border-color: var(--accent);
  box-shadow:
    0 0 24px var(--accent-glow),
    0 0 0 4px var(--accent-soft);
  background: var(--bg-glass-hover);
}

.search-btn {
  position: absolute;
  right: 6px;
  top: 50%;
  transform: translateY(-50%);
  background: var(--accent);
  border: none;
  color: #fff;
  width: 34px;
  height: 34px;
  border-radius: var(--radius-full);
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--duration-fast) var(--ease-out);
  font-size: 1rem;
}

.search-btn:hover {
  box-shadow: 0 0 20px var(--accent-glow);
  transform: translateY(-50%) scale(1.06);
}

.search-btn:active {
  transform: translateY(-50%) scale(0.95);
}

/* Unit toggle */
.unit-toggle {
  display: flex;
  background: var(--bg-glass);
  border-radius: var(--radius-xl);
  border: 1.5px solid var(--bg-glass-border);
  overflow: hidden;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.unit-btn {
  padding: 10px 16px;
  border: none;
  background: transparent;
  color: var(--text-secondary);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  transition: all var(--duration-fast) var(--ease-out);
  white-space: nowrap;
}

.unit-btn.active {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 12px var(--accent-glow);
}

.unit-btn:hover:not(.active) {
  color: var(--text-primary);
  background: rgba(255, 255, 255, 0.04);
}

/* Location button */
.location-btn {
  padding: 10px 16px;
  border-radius: var(--radius-xl);
  border: 1.5px solid var(--bg-glass-border);
  background: var(--bg-glass);
  color: var(--text-primary);
  cursor: pointer;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: all var(--duration-fast) var(--ease-out);
  display: flex;
  align-items: center;
  gap: 6px;
  white-space: nowrap;
}

.location-btn:hover {
  border-color: var(--accent);
  box-shadow: 0 0 16px var(--accent-soft);
  background: var(--bg-glass-hover);
}

/* ====== HERO WEATHER SECTION ====== */
.hero-section {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-xl) var(--space-md);
  position: relative;
}

.hero-city {
  font-family: var(--font-display);
  font-size: var(--text-h1);
  font-weight: 700;
  letter-spacing: -0.04em;
  color: var(--text-accent);
  margin-bottom: var(--space-xs);
}

.hero-date {
  color: var(--text-tertiary);
  font-size: var(--text-body);
  letter-spacing: 0.02em;
}

.hero-temp {
  font-family: var(--font-display);
  font-size: var(--text-hero);
  font-weight: 200;
  letter-spacing: -0.05em;
  line-height: 1;
  color: var(--text-accent);
  margin: var(--space-md) 0;
  position: relative;
}

.hero-temp sup {
  font-size: 0.35em;
  font-weight: 300;
  vertical-align: super;
  letter-spacing: 0;
}

.hero-condition {
  font-size: var(--text-h3);
  color: var(--text-secondary);
  text-transform: capitalize;
  letter-spacing: 0.01em;
}

.hero-feels-like {
  color: var(--text-tertiary);
  font-size: var(--text-body);
  margin-top: var(--space-xs);
}

.hero-icon {
  font-size: 5rem;
  margin-bottom: var(--space-sm);
  animation: floatIcon 4s ease-in-out infinite;
  filter: drop-shadow(0 8px 24px var(--accent-glow));
}

@keyframes floatIcon {
  0%,
  100% {
    transform: translateY(0);
  }

  50% {
    transform: translateY(-12px);
  }
}

/* ====== WEATHER CARDS ====== */
.card {
  background: var(--bg-glass);
  border: 1.5px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  transition: all var(--duration-normal) var(--ease-out);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
}

.card::before {
  content: "";
  position: absolute;
  inset: 0;
  background: var(--gradient-card);
  pointer-events: none;
  border-radius: inherit;
}

.card:hover {
  border-color: var(--bg-glass-border-hover);
  box-shadow:
    var(--shadow-md),
    0 0 30px rgba(255, 255, 255, 0.03);
  transform: translateY(-2px);
  background: var(--bg-glass-hover);
}

.card-title {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-tertiary);
  margin-bottom: var(--space-md);
  font-weight: 600;
}

.card-value {
  font-family: var(--font-display);
  font-size: var(--text-h2);
  font-weight: 500;
  letter-spacing: -0.03em;
  color: var(--text-accent);
}

.card-subtitle {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  margin-top: var(--space-xs);
}

/* ====== CURRENT WEATHER DETAIL GRID ====== */
.current-detail-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
  gap: var(--space-md);
}

/* ====== HOURLY FORECAST ====== */
.hourly-slider-container {
  position: relative;
  overflow: hidden;
}

.hourly-slider {
  display: flex;
  gap: var(--space-md);
  overflow-x: auto;
  scroll-behavior: smooth;
  padding: var(--space-sm) 0;
  scrollbar-width: thin;
  scrollbar-color: rgba(255, 255, 255, 0.15) transparent;
  -webkit-overflow-scrolling: touch;
  cursor: grab;
}

.hourly-slider:active {
  cursor: grabbing;
}

.hourly-slider::-webkit-scrollbar {
  height: 4px;
}

.hourly-slider::-webkit-scrollbar-track {
  background: transparent;
  border-radius: 4px;
}

.hourly-slider::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.2);
  border-radius: 4px;
}

.hourly-card {
  flex: 0 0 auto;
  min-width: 90px;
  padding: var(--space-md);
  background: var(--bg-glass);
  border: 1.5px solid var(--bg-glass-border);
  border-radius: var(--radius-md);
  text-align: center;
  transition: all var(--duration-fast) var(--ease-out);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.hourly-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 20px var(--accent-soft);
  transform: translateY(-4px);
}

.hourly-time {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
  font-weight: 500;
  letter-spacing: 0.04em;
}

.hourly-icon {
  font-size: 2rem;
  margin: var(--space-sm) 0;
}

.hourly-temp {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--text-accent);
}

/* Slider Buttons */
.slider-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  border-radius: var(--radius-full);
  width: 32px;
  height: 32px;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  color: var(--text-secondary);
  z-index: 3;
  backdrop-filter: blur(8px);
  transition: all 0.2s;
}

.slider-btn:hover {
  background: var(--accent);
  color: white;
  border-color: var(--accent);
}

.slider-btn.left {
  left: 4px;
}

.slider-btn.right {
  right: 4px;
}

@media (max-width: 768px) {
  .slider-btn {
    width: 28px;
    height: 28px;
  }
}

/* ====== CHART CONTAINER ====== */
.chart-container {
  background: var(--bg-glass);
  border: 1.5px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  position: relative;
  height: 320px;
}

.chart-container canvas {
  width: 100% !important;
  height: 100% !important;
}

/* ====== 5-DAY FORECAST ====== */
.forecast-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: var(--space-md);
}

.forecast-card {
  background: var(--bg-glass);
  border: 1.5px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg) var(--space-md);
  text-align: center;
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: all var(--duration-normal) var(--ease-out);
}

.forecast-card:hover {
  border-color: var(--accent);
  box-shadow: 0 8px 28px rgba(0, 0, 0, 0.3);
  transform: translateY(-3px);
}

.forecast-day {
  font-weight: 600;
  font-size: var(--text-body);
  color: var(--text-primary);
  letter-spacing: -0.01em;
}

.forecast-icon {
  font-size: 2.5rem;
  margin: var(--space-sm) 0;
}

.forecast-high {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text-accent);
}

.forecast-low {
  font-size: var(--text-sm);
  color: var(--text-tertiary);
  margin-left: 6px;
}

/* ====== WEATHER HIGHLIGHTS GRID ====== */
.highlights-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-md);
}

.highlight-card {
  background: var(--bg-glass);
  border: 1.5px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  transition: all var(--duration-normal) var(--ease-out);
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
  text-align: center;
  align-items: center;
}

.highlight-card:hover {
  border-color: var(--bg-glass-border-hover);
  box-shadow: var(--shadow-md);
  background: var(--bg-glass-hover);
}

.highlight-label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-tertiary);
  font-weight: 600;
}

.highlight-value {
  font-family: var(--font-display);
  font-size: 1.6rem;
  font-weight: 500;
  letter-spacing: -0.03em;
  color: var(--text-accent);
}

.highlight-sub {
  font-size: var(--text-xs);
  color: var(--text-tertiary);
}

/* ====== SUNRISE / SUNSET CARD ====== */
.sun-card {
  background: var(--bg-glass);
  border: 1.5px solid var(--bg-glass-border);
  border-radius: var(--radius-lg);
  padding: var(--space-lg);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  display: flex;
  align-items: center;
  justify-content: space-around;
  gap: var(--space-lg);
  flex-wrap: wrap;
  position: relative;
  overflow: hidden;
}

.sun-item {
  text-align: center;
  flex: 1;
  min-width: 100px;
}

.sun-icon {
  font-size: 2.5rem;
  margin-bottom: var(--space-sm);
}

.sun-time {
  font-family: var(--font-display);
  font-size: 1.3rem;
  font-weight: 500;
  color: var(--text-accent);
}

.sun-label {
  font-size: var(--text-xs);
  text-transform: uppercase;
  letter-spacing: 0.07em;
  color: var(--text-tertiary);
}

.sun-arc {
  flex: 2;
  min-width: 150px;
  height: 80px;
  position: relative;
  border-bottom: 2px solid rgba(255, 255, 255, 0.1);
  border-radius: 0 0 50% 50%;
  overflow: hidden;
}

.sun-dot {
  position: absolute;
  width: 14px;
  height: 14px;
  left: 20%;
  border-radius: var(--radius-full);
  background: var(--accent-warm);
  box-shadow: 0 0 20px rgba(245, 166, 91, 0.7);
  transition: left 0.6s var(--ease-out);
  bottom: -7px;
}

/* ====== AIR QUALITY ====== */
.aqi-header {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  flex-wrap: wrap;
}

.aqi-description {
  color: var(--text-secondary);
}

.aqi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
  gap: var(--space-md);
  margin-top: var(--space-md);
}

.aqi-badge {
  display: inline-block;
  padding: 6px 14px;
  border-radius: var(--radius-xl);
  font-weight: 600;
  font-size: var(--text-sm);
  letter-spacing: 0.03em;
  text-transform: uppercase;
}

.aqi-good {
  background: rgba(76, 175, 80, 0.2);
  color: #81c784;
}

.aqi-moderate {
  background: rgba(255, 193, 7, 0.2);
  color: #ffd54f;
}

.aqi-unhealthy {
  background: rgba(244, 67, 54, 0.2);
  color: #ef9a9a;
}

.aqi-bad {
  background: rgba(156, 39, 176, 0.2);
  color: #ce93d8;
}

/* ====== FOOTER ====== */
.app-footer {
  text-align: center;
  padding: var(--space-xl) var(--space-md);
  color: var(--text-tertiary);
  font-size: var(--text-xs);
  letter-spacing: 0.04em;
  border-top: 1px solid var(--bg-glass-border);
  margin-top: var(--space-xl);
}

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

.app-footer a:hover {
  color: var(--text-accent);
}

.app-footer-meta {
  margin-top: 4px;
}

/* ====== RECENT SEARCHES ====== */
.recent-searches {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
  margin-top: var(--space-sm);
}

.recent-tag {
  padding: 6px 14px;
  border-radius: var(--radius-xl);
  background: var(--bg-glass);
  border: 1px solid var(--bg-glass-border);
  color: var(--text-secondary);
  font-size: var(--text-xs);
  cursor: pointer;
  transition: all var(--duration-fast) var(--ease-out);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  white-space: nowrap;
}

.recent-tag:hover {
  border-color: var(--accent);
  color: var(--text-accent);
  box-shadow: 0 0 12px var(--accent-soft);
}

/* ====== RESPONSIVE BREAKPOINTS ====== */
@media (max-width: 768px) {
  .app-container {
    padding: var(--space-sm);
    gap: var(--space-md);
  }

  .nav-bar {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-sm);
  }

  .search-wrapper {
    max-width: 100%;
  }

  .nav-controls {
    justify-content: center;
  }

  .hero-temp {
    font-size: clamp(3rem, 12vw, 5rem);
  }

  .hero-icon {
    font-size: 3.5rem;
  }

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

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

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

  .sun-card {
    flex-direction: column;
    text-align: center;
  }

  .sun-arc {
    width: 100%;
    flex: none;
  }
}

@media (max-width: 480px) {
  .highlights-grid {
    grid-template-columns: 1fr;
  }

  .forecast-grid {
    grid-template-columns: 1fr 1fr;
  }

  .current-detail-grid {
    grid-template-columns: 1fr 1fr;
  }

  .hourly-card {
    min-width: 70px;
    padding: var(--space-sm);
  }

  .unit-btn {
    padding: 8px 12px;
    font-size: var(--text-xs);
  }

  .location-btn {
    padding: 8px 12px;
    font-size: var(--text-xs);
  }
}

@media (min-width: 1440px) {
  .app-container {
    max-width: 1500px;
    padding: var(--space-xl);
    gap: var(--space-xl);
  }

  .highlights-grid {
    grid-template-columns: repeat(4, 1fr);
  }

  .forecast-grid {
    grid-template-columns: repeat(5, 1fr);
  }

  .current-detail-grid {
    grid-template-columns: repeat(6, 1fr);
  }
}

@media (min-width: 2560px) {
  .app-container {
    max-width: 2000px;
    padding: var(--space-2xl);
    gap: var(--space-2xl);
  }

  body {
    font-size: 18px;
  }

  .card {
    padding: var(--space-xl);
    border-radius: var(--radius-xl);
  }
}