/* ===========================
   CSS VARIABLES & RESET
   =========================== */
:root {
  --bg-from: #1a1a2e;
  --bg-to: #16213e;
  --accent: #4f8ef7;
  --accent-hover: #3a7de0;
  --card-bg: rgba(255, 255, 255, 0.06);
  --card-border: rgba(255, 255, 255, 0.1);
  --text-primary: #f0f4ff;
  --text-secondary: #9aaacb;
  --error-bg: rgba(231, 76, 60, 0.12);
  --error-border: #e74c3c;
  --radius-lg: 20px;
  --radius-md: 14px;
  --radius-sm: 10px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
}

*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

/* ===========================
   BASE
   =========================== */
body {
  font-family: 'DM Sans', sans-serif;
  background: linear-gradient(135deg, var(--bg-from) 0%, var(--bg-to) 100%);
  color: var(--text-primary);
  min-height: 100vh;
  padding: 24px 16px 40px;
  transition: background var(--transition);
  position: relative;
  overflow-x: hidden;
}

/* Screen-reader only utility */
.sr-only {
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}

/* ===========================
   CONTAINER
   =========================== */
.container {
  position: relative;
  z-index: 1;
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 28px;
}

/* ===========================
   HEADER
   =========================== */
header {
  text-align: center;
  padding-bottom: 8px;
}

header h1 {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(2rem, 5vw, 3rem);
  color: var(--text-primary);
  letter-spacing: -0.5px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
}

header h1 i {
  color: var(--accent);
  font-size: 0.85em;
}

.tagline {
  color: var(--text-secondary);
  font-size: 1rem;
  font-weight: 300;
  margin-top: 6px;
  letter-spacing: 0.3px;
}

/* ===========================
   SEARCH
   =========================== */
.search-container {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.input-group {
  display: flex;
  gap: 10px;
}

#cityInput {
  flex: 1;
  padding: 14px 18px;
  background: var(--card-bg);
  border: 1.5px solid var(--card-border);
  border-radius: var(--radius-md);
  color: var(--text-primary);
  font-family: 'DM Sans', sans-serif;
  font-size: 1rem;
  transition: border-color var(--transition), box-shadow var(--transition);
  backdrop-filter: blur(8px);
}

#cityInput::placeholder {
  color: var(--text-secondary);
  font-weight: 300;
}

#cityInput:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 142, 247, 0.2);
}

#searchBtn {
  padding: 14px 22px;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-md);
  font-family: 'DM Sans', sans-serif;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  display: flex;
  align-items: center;
  gap: 8px;
  transition: background var(--transition), transform var(--transition), box-shadow var(--transition);
  white-space: nowrap;
}

#searchBtn:hover {
  background: var(--accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 20px rgba(79, 142, 247, 0.35);
}

#searchBtn:active {
  transform: translateY(0);
  box-shadow: none;
}

.hint {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.875rem;
  font-weight: 300;
  letter-spacing: 0.5px;
}

/* ===========================
   LOADING
   =========================== */
.loading {
  text-align: center;
  padding: 40px 20px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 16px;
}

.spinner {
  width: 44px;
  height: 44px;
  border: 3px solid rgba(255,255,255,0.1);
  border-top-color: var(--accent);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.loading p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

/* ===========================
   WEATHER DISPLAY
   =========================== */
.weather-display {
  display: flex;
  flex-direction: column;
  gap: 20px;
  animation: fadeUp 0.5s ease forwards;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(18px); }
  to   { opacity: 1; transform: translateY(0); }
}

.weather-header {
  text-align: center;
}

.weather-header h2 {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(1.6rem, 4vw, 2.2rem);
  color: var(--text-primary);
  letter-spacing: -0.3px;
}

.date {
  color: var(--text-secondary);
  font-size: 0.9rem;
  margin-top: 4px;
}

/* Main weather card */
.weather-main {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-lg);
  padding: 28px 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 24px;
  backdrop-filter: blur(12px);
}

.temp-block {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.temperature {
  font-family: 'DM Serif Display', serif;
  font-size: clamp(3rem, 8vw, 5rem);
  line-height: 1;
  color: var(--text-primary);
  display: flex;
  align-items: flex-start;
}

.unit {
  font-size: 0.38em;
  color: var(--text-secondary);
  margin-top: 8px;
  font-family: 'DM Sans', sans-serif;
  font-weight: 300;
}

.feels-like {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 300;
}

.icon-block {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 6px;
}

#weatherIcon {
  filter: drop-shadow(0 4px 12px rgba(79, 142, 247, 0.3));
  animation: float 3s ease-in-out infinite;
}

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

.condition-label {
  color: var(--text-secondary);
  font-size: 0.9rem;
  font-weight: 500;
  text-align: center;
  text-transform: capitalize;
}

/* Detail cards */
.weather-details {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.detail-card {
  background: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--radius-md);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  backdrop-filter: blur(8px);
  transition: transform var(--transition), border-color var(--transition);
}

.detail-card:hover {
  transform: translateY(-3px);
  border-color: rgba(79, 142, 247, 0.3);
}

.detail-card i {
  font-size: 1.4rem;
  color: var(--accent);
  flex-shrink: 0;
  width: 24px;
  text-align: center;
}

.detail-card .label {
  color: var(--text-secondary);
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.8px;
  font-weight: 500;
  margin-bottom: 3px;
}

.detail-card .value {
  color: var(--text-primary);
  font-size: 1.1rem;
  font-weight: 600;
}

/* ===========================
   ERROR
   =========================== */
.error-message {
  background: var(--error-bg);
  border-left: 4px solid var(--error-border);
  border-radius: var(--radius-sm);
  padding: 18px 20px;
  display: flex;
  align-items: center;
  gap: 14px;
  animation: shake 0.4s ease;
}

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

.error-message i {
  color: var(--error-border);
  font-size: 1.3rem;
  flex-shrink: 0;
}

.error-message p {
  color: #f5a093;
  font-size: 0.95rem;
}

/* ===========================
   FOOTER
   =========================== */
footer {
  text-align: center;
  color: var(--text-secondary);
  font-size: 0.85rem;
  font-weight: 300;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

footer a {
  color: var(--accent);
  text-decoration: none;
  font-weight: 500;
  transition: color var(--transition);
}

footer a:hover {
  color: #fff;
}

.copyright {
  font-size: 0.78rem;
  opacity: 0.5;
}

/* ===========================
   UTILITY
   =========================== */
.hidden {
  display: none !important;
}

/* ===========================
   WEATHER MOOD THEMES
   (CSS variables = no !important chaos)
   =========================== */
.weather-mood-sunny {
  --bg-from: #f76b1c;
  --bg-to: #fad961;
  --accent: #e65c00;
  --accent-hover: #c44d00;
  --text-primary: #2d1a00;
  --text-secondary: #7a4400;
  --card-bg: rgba(255,255,255,0.25);
  --card-border: rgba(255,255,255,0.4);
}

.weather-mood-cloudy {
  --bg-from: #485563;
  --bg-to: #29323c;
  --accent: #8fa3b1;
  --accent-hover: #6f8795;
}

.weather-mood-rainy {
  --bg-from: #1c3f5e;
  --bg-to: #0d2137;
  --accent: #4fa3d4;
  --accent-hover: #3585b0;
  --card-border: rgba(79,163,212,0.2);
}

.weather-mood-snowy {
  --bg-from: #d7e9f7;
  --bg-to: #aecde8;
  --accent: #1a78c2;
  --accent-hover: #145fa0;
  --text-primary: #0d2a45;
  --text-secondary: #3a6a8a;
  --card-bg: rgba(255,255,255,0.5);
  --card-border: rgba(26,120,194,0.25);
}

.weather-mood-night {
  --bg-from: #050510;
  --bg-to: #0e0e30;
  --accent: #a78bfa;
  --accent-hover: #8b69f0;
  --card-border: rgba(167,139,250,0.15);
}

.weather-mood-stormy {
  --bg-from: #0c0c0c;
  --bg-to: #1a1a2a;
  --accent: #f7d060;
  --accent-hover: #e0b840;
  --card-border: rgba(247,208,96,0.15);
}

.weather-mood-misty {
  --bg-from: #5c6370;
  --bg-to: #3a3f4a;
  --accent: #b0bec5;
  --accent-hover: #90a4ae;
}

/* ===========================
   RESPONSIVE
   =========================== */
@media (max-width: 600px) {
  .weather-main {
    flex-direction: column-reverse;
    text-align: center;
    padding: 24px 20px;
  }

  .temp-block {
    align-items: center;
  }

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

  #searchBtn {
    justify-content: center;
  }
}

@media (max-width: 380px) {
  .weather-details {
    grid-template-columns: 1fr;
  }
}