/* Modern styles with CSS variables, responsive layout, and small animations */
:root{
  --bg: #f7f7fb;
  --card: #ffffff;
  --muted: #6b7280;
  --accent-start: #7c3aed;
  --accent-end: #06b6d4;
  --text: #0f172a;
  --glass: rgba(255,255,255,0.6);
  --radius: 12px;
  --container: 1100px;
  --shadow: 0 8px 24px rgba(16,24,40,0.06);
}

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

html,body{ height:100%; }

body{
  margin:0;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial;
  /* use a second variable so we can update the gradient for dark mode too */
  --bg-secondary: #eef2ff;
  background: linear-gradient(180deg,var(--bg),var(--bg-secondary) 60%);
  color:var(--text);
  transition: background 0.3s ease, color 0.3s ease;
  -webkit-font-smoothing:antialiased;
  -moz-osx-font-smoothing:grayscale;
  line-height:1.45;
}

.container{
  width: min(92%, var(--container));
  margin: 0 auto;
}

/* Header */
.site-header{
  background: rgba(255,255,255,0.95);
  border-bottom: 1px solid rgba(15,23,42,0.04);
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: blur(4px);
}

.header-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap:1rem;
  padding: 1rem 0;
}

.brand{ display:flex; align-items:center; gap:1.25rem; }

.logo{
  margin:0;
  font-size:1.15rem;
  font-weight:700;
  letter-spacing: -0.02em;
}

/* Nav */
.main-nav a{
  margin-right: 1rem;
  color:var(--muted);
  text-decoration:none;
  font-weight:600;
  transition: color .15s ease;
}
.main-nav a:hover,
.main-nav a[aria-current="page"]{ color:var(--text); }

/* Header actions */
.icon-btn{
  background:transparent;
  border: none;
  padding: 0.4rem 0.6rem;
  border-radius: 10px;
  cursor:pointer;
  font-size:1.05rem;
}

/* Hero */
.hero{ padding: 3.25rem 0; }

.hero-inner{
  display:grid;
  grid-template-columns: 1fr 360px;
  gap: 2rem;
  align-items:center;
}

.hero-content h2{
  font-size: clamp(1.5rem, 3vw, 2rem);
  margin:0 0 .5rem 0;
}

.lead{
  color:var(--muted);
  margin:0 0 1.25rem 0;
}

.hero-cta{ display:flex; gap:0.75rem; align-items:center; }

/* Buttons */
.btn{
  display:inline-flex;
  align-items:center;
  justify-content:center;
  gap:0.6rem;
  padding: 0.6rem 1rem;
  border-radius: 10px;
  border: none;
  cursor:pointer;
  text-decoration:none;
  font-weight:600;
  line-height: 1;
}

.btn-primary{
  background: linear-gradient(90deg,var(--accent-start),var(--accent-end));
  color:white;
  box-shadow: 0 8px 20px rgba(124,58,237,0.12);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.btn-primary:hover,
.btn-primary:focus{
  transform: translateY(-2px);
  box-shadow: 0 12px 24px rgba(124,58,237,0.2);
}
.btn-primary:active{
  transform: translateY(0);
  box-shadow: 0 6px 16px rgba(124,58,237,0.15);
}

.btn-ghost{
  background: transparent;
  border: 1px solid rgba(15,23,42,0.12);
  color:var(--text);
}

.btn:focus-visible,
a.btn:focus-visible,
button:focus-visible{
  outline: 3px solid rgba(124,58,237,0.35);
  outline-offset: 2px;
}

/* Hero illustration */
.hero-illustration{
  display:flex;
  align-items:center;
  justify-content:center;
  background: linear-gradient(180deg, rgba(255,255,255,0.7), rgba(255,255,255,0.35));
  border-radius: 16px;
  padding: 1.25rem;
  box-shadow: var(--shadow);
}

.illustration-placeholder{
  width: 100%;
  min-height: 200px;
  border-radius: 14px;
  display:flex;
  align-items:center;
  justify-content:center;
  text-align:center;
  color: rgba(15,23,42,0.6);
  background: rgba(255,255,255,0.65);
  border: 1px solid rgba(15,23,42,0.06);
}

/* Features */
.features{ padding: 1.25rem 0 2.25rem; }

.feature-grid{
  display:grid;
  grid-template-columns: repeat(3, minmax(0, 1fr));
  gap: 1rem;
}

.card{
  background: var(--card);
  border: 1px solid rgba(15,23,42,0.06);
  border-radius: var(--radius);
  padding: 1rem;
  box-shadow: var(--shadow);
}

.card h3{ margin:0 0 .4rem 0; }
.card p{ margin:0; color: var(--muted); }

/* Quick Form */
.quick-form-section{
  padding: 2rem 0 4rem;
  /* subtle background behind form to separate from page */
  background: rgba(15,23,42,0.02);
}

.quick-form{
  background: var(--card);
  border: 1px solid rgba(15,23,42,0.1);
  border-radius: var(--radius);
  padding: 2rem;
  max-width: 720px;
  margin: 0 auto;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  transition: transform 0.2s ease;
}
.quick-form:hover{
  transform: translateY(-2px);
}

.quick-form input,
.quick-form select{
  /* soften input background */
  background: rgba(255,255,255,0.9);
  transition: box-shadow 0.2s ease, border-color 0.2s ease;
}
.quick-form input:focus,
.quick-form select:focus{
  outline: none;
  box-shadow: 0 0 0 3px rgba(6,182,212,0.3);
}

.section-title{
  font-size:1.75rem;
  text-align:center;
  margin-bottom:1.5rem;
  position:relative;
}
.section-title::after{
  content:"";
  display:block;
  width:60px;
  height:4px;
  background: linear-gradient(90deg,var(--accent-start),var(--accent-end));
  margin:0.5rem auto 0;
  border-radius:2px;
}

/* error message style */
.form-error{
  display:block;
  color:#dc2626; /* red-600 */
  font-size:0.875rem;
  margin-top:0.25rem;
  font-style:italic;
  opacity:0.9;
  text-align:center; /* center the text */
  width:100%;
}

.section-title{ margin: 1.25rem 0 1rem; }

.quick-form{
  background: rgba(255,255,255,0.6);
  border: 1px solid rgba(15,23,42,0.06);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 1rem;
  max-width: 760px;
}

.form-row{
  display:grid;
  grid-template-columns: 140px 1fr;
  gap: 0.75rem 1rem;
  align-items:center;
  margin-bottom: 0.75rem;
}

.form-label{
  font-weight: 600;
  color: rgba(15,23,42,0.85);
  justify-self: end;
  text-align: right;
}

.quick-form input,
.quick-form select{
  width: 100%;
  padding: 0.55rem 0.7rem;
  border-radius: 10px;
  border: 1px solid rgba(15,23,42,0.14);
  background: rgba(255,255,255,0.85);
  font: inherit;
}

.quick-form input:focus,
.quick-form select:focus{
  outline: 3px solid rgba(6,182,212,0.25);
  border-color: rgba(6,182,212,0.55);
}

/* Fieldset should behave like a normal row (no default inset border/margins) */
.quick-form fieldset{
  margin: 0 0 0.75rem 0;
  padding: 0;
  border: 0;
  min-width: 0;
}

.quick-form legend{
  padding: 0;
}

/* Radio group aligned with the inputs (right column) */
.quick-form fieldset {
  display:grid;
  grid-template-columns: 140px 1fr;
  align-items: center;
  margin-bottom: 0.75rem;
}

.radio-group{
  width: 100%;
  display:flex;
  gap: 0.85rem;
  align-items:center;
  justify-content:center; /* center the radio buttons within their cell */
  flex-wrap: wrap;
  padding: 0.55rem 0.7rem;
  border-radius: 10px;
  border: 1px solid rgba(15,23,42,0.14);
  background: rgba(255,255,255,0.6);
}

.radio-item{
  display:inline-flex;
  align-items:center;
  gap: 0.35rem;
  color: rgba(15,23,42,0.85);
  font-weight: 600;
}
.radio-item input{ margin: 0; }

/* Actions row aligned to the right column */
.form-actions{
  display:flex;
  gap: 0.75rem;
  align-items:center;
}

/* Footer */
.site-footer{
  border-top: 1px solid rgba(15,23,42,0.06);
  padding: 1.25rem 0;
  background: rgba(255,255,255,0.65);
}

.footer-inner{
  display:flex;
  align-items:center;
  justify-content:space-between;
  gap: 1rem;
}

.footer-links a{
  color: var(--muted);
  text-decoration:none;
  font-weight:600;
  margin-left: 0.75rem;
}
.footer-links a:hover{ color: var(--text); }

/* Responsive tweaks */
@media (max-width: 900px){
  .hero-inner{
    grid-template-columns: 1fr;
  }
  .feature-grid{
    grid-template-columns: 1fr;
  }
}

@media (max-width: 520px){
  .form-row{
    grid-template-columns: 1fr;
    align-items: start;
  }
  .form-label{
    justify-self: start;
    text-align: left;
  }
  .form-actions{
    flex-wrap: wrap;
  }
}

/* Dark mode overrides */
body.dark {
  --bg: #1f2937;
  --bg-secondary: #111827; /* darker second stop */
  --card: #374151;
  --muted: #9ca3af;
  --text: #f9fafb;
  --accent-start: #a78bfa;
  --accent-end: #38bdf8;
}

/* Survey form uses same base styling as quick form */
.survey-form,
.quick-form {
  background: var(--card);
  border: 1px solid rgba(15,23,42,0.1);
  border-radius: var(--radius);
  padding: 2rem;
  max-width: 720px;
  margin: 0 auto;
  box-shadow: 0 4px 16px rgba(0,0,0,0.08);
  transition: transform 0.2s ease;
}

/* dark adjustments for both forms and elements */
body.dark .quick-form,
body.dark .survey-form {
  background: var(--card);
  border-color: rgba(255,255,255,0.1);
  box-shadow: 0 4px 16px rgba(0,0,0,0.3);
}

body.dark .form-label,
body.dark .radio-item {
  color: var(--text);
}

body.dark .quick-form input,
body.dark .survey-form input,
body.dark .quick-form select {
  background: rgba(255,255,255,0.1);
  color: var(--text);
  border: 1px solid rgba(255,255,255,0.2);
}

body.dark .quick-form input:focus,
body.dark .survey-form input:focus,
body.dark .quick-form select:focus {
  outline: 3px solid rgba(6,182,212,0.25);
  border-color: rgba(6,182,212,0.55);
}

/* tweak some background colors when dark class is on */
body.dark .site-header {
  background: rgba(31,41,55,0.95);
  border-bottom-color: rgba(255,255,255,0.1);
}
body.dark .site-footer {
  background: rgba(31,41,55,0.8);
  border-top-color: rgba(255,255,255,0.1);
}
body.dark .hero-illustration {
  background: linear-gradient(180deg, rgba(255,255,255,0.1), rgba(255,255,255,0.05));
}