/* 🚀 Smart Travel Planner – Ultra Premium Theme */

/* ---------- Design Tokens ---------- */
:root {
  /* Core Palette */
  --bg: #060b1a;
  --bg-accent: rgba(15, 25, 45, 0.75);
  --panel: rgba(20, 30, 60, 0.55);
  --card: rgba(20, 28, 55, 0.45);
  --muted: #a4b8e6;
  --text: #f0f6ff;
  --heading: #ffffff;

  /* Accents */
  --accent: #6ea8ff;
  --accent2: #9bffcf;
  --accent3: #ff7fff;
  --glow: rgba(110, 168, 255, 0.35);

  /* New turquoise for links */
  --link: #40e0d0; /* turquoise */
}

/* ---------- Reset ---------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}
html, body {
  height: 100%;
}
body {
  font-family: "Inter", system-ui, sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  position: relative;
  line-height: 1.6;
  perspective: 1000px;
}

/* ---------- Futuristic Background ---------- */
body::before {
  content: "";
  position: fixed;
  inset: 0;
  background: url("https://images.unsplash.com/photo-1507525428034-b723cf961d3e")
    no-repeat center/cover;
  filter: brightness(0.35) blur(10px);
  transform: scale(1.1);
  z-index: -3;
  animation: bg-zoom 30s ease-in-out infinite alternate;
}
@keyframes bg-zoom {
  from { transform: scale(1.05) translate(0, 0); }
  to { transform: scale(1.15) translate(-4%, -4%); }
}

/* Aurora Overlay */
body::after {
  content: "";
  position: fixed;
  inset: 0;
  background: radial-gradient(circle at 30% 20%, rgba(110,168,255,0.25), transparent 70%),
              radial-gradient(circle at 70% 80%, rgba(155,255,207,0.25), transparent 70%);
  z-index: -2;
  mix-blend-mode: screen;
  animation: auroraShift 12s ease-in-out infinite alternate;
}
@keyframes auroraShift {
  from { background-position: 0% 0%, 100% 100%; }
  to { background-position: 20% 20%, 80% 60%; }
}

/* Subtle Particles */
.particles {
  position: fixed;
  inset: 0;
  pointer-events: none;
  background-image: radial-gradient(circle, rgba(255,255,255,0.08) 1px, transparent 1px);
  background-size: 100px 100px;
  animation: drift 80s linear infinite;
  z-index: -1;
}
@keyframes drift {
  from { background-position: 0 0; }
  to { background-position: 300px 300px; }
}

/* ---------- Layout ---------- */
.container {
  max-width: 980px;
  margin: auto;
  padding: 4rem 1.5rem;
  display: grid;
  gap: 3rem;
}

/* ---------- Title ---------- */
h1 {
  text-align: center;
  font-size: 3rem;
  font-weight: 900;
  letter-spacing: -1px;
  background: linear-gradient(90deg, var(--accent), var(--accent2), var(--accent3));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  text-shadow: 0 0 25px var(--glow), 0 0 35px rgba(155,255,207,0.2);
  animation: glowPulse 5s ease-in-out infinite alternate;
}
@keyframes glowPulse {
  from { text-shadow: 0 0 15px var(--accent), 0 0 25px var(--accent2); }
  to   { text-shadow: 0 0 25px var(--accent3), 0 0 40px var(--accent2); }
}

/* ---------- Glass Cards ---------- */
.card {
  background: var(--card);
  backdrop-filter: blur(18px) saturate(160%);
  -webkit-backdrop-filter: blur(18px) saturate(160%);
  border-radius: 1.4rem;
  padding: 2.2rem;
  border: 1px solid rgba(255,255,255,0.12);
  box-shadow: 0 8px 30px rgba(0,0,0,0.6), inset 0 0 25px rgba(255,255,255,0.05);
  transition: transform 0.35s ease, box-shadow 0.35s ease;
  transform-style: preserve-3d;
}
.card:hover {
  transform: translateY(-10px) rotateX(6deg) rotateY(-6deg);
  box-shadow: 0 15px 40px rgba(0,0,0,0.7), 0 0 35px rgba(110,168,255,0.5);
}

/* ---------- Form Elements ---------- */
label {
  display: block;
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
  color: var(--muted);
}
input, select, textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  margin-bottom: 1.3rem;
  border-radius: 1rem;
  border: 1px solid rgba(255,255,255,0.12);
  background: var(--bg-accent);
  backdrop-filter: blur(10px);
  color: var(--text);
  font-size: 1rem;
  transition: all 0.25s ease;
}
input:focus, select:focus, textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 4px rgba(110,168,255,0.25);
  transform: scale(1.01);
}
input:hover, select:hover, textarea:hover {
  box-shadow: 0 0 12px rgba(155,255,207,0.3), 0 0 18px rgba(110,168,255,0.25);
}

/* ---------- Buttons ---------- */
button {
  padding: 1rem 1.6rem;
  border-radius: 1rem;
  border: none;
  font-weight: 700;
  cursor: pointer;
  font-size: 1rem;
  letter-spacing: 0.5px;
  transition: all 0.3s ease;
  text-transform: uppercase;
  margin: 0.3rem;
}

/* Primary (Generate Itinerary) */
button.primary {
  background: linear-gradient(270deg, #d96dff, #8ab4ff, #9bffcf);
  background-size: 400% 400%;
  color: #fff;
  animation: btnShine 6s ease infinite;
  box-shadow: 0 0 18px rgba(200, 150, 255, 0.5), 0 0 25px rgba(155, 255, 207, 0.35);
}
button.primary:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 0 25px rgba(200, 150, 255, 0.8), 0 0 35px rgba(155, 255, 207, 0.6);
}

/* Secondary (Copy & Clear) */
button.secondary {
  background: rgba(255, 255, 255, 0.12);
  backdrop-filter: blur(10px);
  color: #f0f6ff;
  border: 1px solid rgba(255,255,255,0.2);
}
button.secondary:hover {
  background: rgba(255, 255, 255, 0.2);
  color: #fff;
  box-shadow: 0 0 15px rgba(110, 168, 255, 0.4);
  transform: translateY(-2px);
}

/* Disabled state */
button:disabled {
  opacity: 0.6;
  filter: grayscale(40%);
  cursor: not-allowed;
}

/* Gradient Animation */
@keyframes btnShine {
  0% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
  100% { background-position: 0% 50%; }
}

/* ---------- Output Sections ---------- */
.output {
  margin-top: 2rem;
  animation: fadeUp 0.9s ease both;
}
.day {
  margin-bottom: 2rem;
  padding: 1.6rem;
  background: rgba(20, 28, 55, 0.55);
  border-radius: 1.2rem;
  border: 1px solid rgba(255,255,255,0.1);
  backdrop-filter: blur(12px);
  animation: fadeUp 1s ease both;
  position: relative;
  overflow: hidden;
}
.day h2 {
  font-size: 1.5rem;
  margin-bottom: 1rem;
  color: var(--accent2);
  text-shadow: 0 0 10px rgba(155,255,207,0.5);
}
.day ul {
  list-style: none;
}
.day li {
  padding: 0.5rem 0;
  border-left: 3px solid var(--accent);
  padding-left: 1rem;
  margin-bottom: 0.7rem;
  opacity: 0;
  transform: translateX(-15px);
  animation: fadeInItem 0.7s ease forwards;
}
.day li:nth-child(1) { animation-delay: 0.2s; }
.day li:nth-child(2) { animation-delay: 0.4s; }
.day li:nth-child(3) { animation-delay: 0.6s; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(25px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeInItem {
  to { opacity: 1; transform: translateX(0); }
}

/* ---------- Links (New Turquoise Style) ---------- */
a {
  color: var(--link);
  text-decoration: underline;
  transition: color 0.3s ease, text-shadow 0.3s ease;
}
a:hover {
  color: #5fffe0; /* brighter turquoise */
  text-shadow: 0 0 12px rgba(64, 224, 208, 0.7);
}