/* ============================================================
   ReservWise — Design System
   ============================================================ */

:root {
  /* Brand */
  --green-700: #1c6529;
  --green-600: #227932;
  --green-500: #2e9143;
  --green-400: #4caf63;
  --green-200: #a5d6a7;
  --green-100: #e6f3e8;
  --green-50:  #f3f9f4;

  --charcoal-900: #1c2240;
  --charcoal-800: #2c3358;
  --charcoal-700: #3a4068;
  --charcoal-500: #6b7194;
  --charcoal-400: #8d93b3;

  --gray-50: #f7f8fa;
  --gray-100: #eef0f4;
  --gray-200: #e1e5ec;
  --gray-300: #cfdadc;
  --gray-400: #b3bbc5;

  --white: #ffffff;
  --offwhite: #fafbfc;

  /* Spacing scale */
  --sp-1: 4px;
  --sp-2: 8px;
  --sp-3: 12px;
  --sp-4: 16px;
  --sp-5: 24px;
  --sp-6: 32px;
  --sp-7: 48px;
  --sp-8: 64px;
  --sp-9: 96px;
  --sp-10: 128px;

  /* Radii */
  --r-sm: 6px;
  --r-md: 10px;
  --r-lg: 16px;
  --r-xl: 24px;
  --r-2xl: 32px;

  /* Shadows — soft, premium */
  --shadow-xs: 0 1px 2px rgba(28, 34, 64, 0.04);
  --shadow-sm: 0 2px 6px rgba(28, 34, 64, 0.05), 0 1px 2px rgba(28, 34, 64, 0.04);
  --shadow-md: 0 8px 24px rgba(28, 34, 64, 0.06), 0 2px 6px rgba(28, 34, 64, 0.04);
  --shadow-lg: 0 24px 60px rgba(28, 34, 64, 0.10), 0 6px 16px rgba(28, 34, 64, 0.05);
  --shadow-xl: 0 40px 100px rgba(28, 34, 64, 0.14), 0 12px 30px rgba(28, 34, 64, 0.06);
  --shadow-green: 0 12px 32px rgba(34, 121, 50, 0.20);

  /* Type */
  --font-display: "Montserrat", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-body: "Open Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "JetBrains Mono", ui-monospace, "SF Mono", Menlo, monospace;
}

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--charcoal-800);
  background: var(--white);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  color: var(--charcoal-900);
  letter-spacing: -0.02em;
  line-height: 1.1;
  margin: 0;
}

p { margin: 0; }

a { color: inherit; text-decoration: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ===== Buttons ===== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 22px;
  border-radius: var(--r-md);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 15px;
  letter-spacing: -0.01em;
  cursor: pointer;
  transition: transform .15s ease, box-shadow .2s ease, background .2s ease, color .2s ease, border-color .2s ease;
  white-space: nowrap;
  border: 1px solid transparent;
}
.btn:active { transform: translateY(1px); }

.btn-primary {
  background: var(--green-600);
  color: var(--white);
  box-shadow: var(--shadow-green);
}
.btn-primary:hover {
  background: var(--green-700);
  box-shadow: 0 16px 40px rgba(34, 121, 50, 0.28);
}

.btn-secondary {
  background: var(--white);
  color: var(--charcoal-900);
  border-color: var(--gray-200);
}
.btn-secondary:hover {
  border-color: var(--charcoal-800);
}

.btn-ghost {
  background: transparent;
  color: var(--charcoal-800);
  padding: 10px 14px;
}
.btn-ghost:hover { color: var(--green-600); }

.btn-sm { padding: 10px 16px; font-size: 14px; }
.btn-lg { padding: 17px 28px; font-size: 16px; }

/* ===== Layout ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--sp-5);
}
.container-wide {
  max-width: 1320px;
  margin: 0 auto;
  padding: 0 var(--sp-5);
}

section { padding: var(--sp-9) 0; }
.section-tight { padding: var(--sp-8) 0; }

/* ===== Eyebrow / labels ===== */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--green-600);
}
.eyebrow .dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: var(--green-500);
  box-shadow: 0 0 0 4px var(--green-100);
}

/* ===== Typography utilities ===== */
.h-display {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(40px, 5.4vw, 72px);
  line-height: 1.04;
  letter-spacing: -0.03em;
  color: var(--charcoal-900);
}
.h-section {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(32px, 3.6vw, 52px);
  line-height: 1.08;
  letter-spacing: -0.025em;
  color: var(--charcoal-900);
}
.h-card {
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 22px;
  letter-spacing: -0.01em;
  color: var(--charcoal-900);
}
.lead {
  font-size: 19px;
  line-height: 1.55;
  color: var(--charcoal-500);
  max-width: 56ch;
}
.text-mono { font-family: var(--font-mono); }
.text-green { color: var(--green-600); }
.text-muted { color: var(--charcoal-500); }

/* ===== Cards ===== */
.card {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-xs);
}
.card-elevated {
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--r-lg);
  box-shadow: var(--shadow-md);
}

/* ===== Page chrome ===== */
.page-fade-in {
  animation: pageFade .5s ease both;
}
@keyframes pageFade {
  from { opacity: 0; transform: translateY(8px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ===== Nav ===== */
.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.85);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid var(--gray-100);
}
.nav-inner {
  max-width: 1320px;
  margin: 0 auto;
  padding: 14px var(--sp-5);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--sp-6);
}
.nav-brand {
  display: flex; align-items: center; gap: 10px;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  letter-spacing: -0.01em;
}
.nav-brand .reserv { color: var(--charcoal-900); }
.nav-brand .wise { color: var(--green-600); }
.nav-brand img { height: 28px; width: auto; display: block; }

.nav-links {
  display: flex; align-items: center; gap: 4px;
}
.nav-link {
  padding: 8px 14px;
  border-radius: 8px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 14.5px;
  color: var(--charcoal-700);
  transition: color .15s, background .15s;
  cursor: pointer;
}
.nav-link:hover { color: var(--green-600); background: var(--green-50); }
.nav-link.active { color: var(--green-600); }

.nav-cta { display: flex; align-items: center; gap: 8px; }

/* ===== Footer ===== */
.footer {
  background: var(--charcoal-900);
  color: #c9cee0;
  padding: 80px 0 40px;
}
.footer h4 {
  color: var(--white);
  font-size: 13px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
}
.footer a {
  display: block;
  color: #b8bdd1;
  font-size: 14px;
  padding: 6px 0;
  transition: color .15s;
  cursor: pointer;
}
.footer a:hover { color: var(--green-400); }

.footer-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr 1fr 1fr;
  gap: 40px;
}
.footer-bottom {
  margin-top: 60px;
  padding-top: 24px;
  border-top: 1px solid rgba(255,255,255,0.08);
  display: flex;
  justify-content: space-between;
  font-size: 13px;
  color: #8a90aa;
}

/* ===== Tag / badge ===== */
.tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--green-50);
  color: var(--green-700);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 12px;
  letter-spacing: 0.02em;
  border: 1px solid var(--green-100);
}

/* ===== Subtle background accents ===== */
.bg-soft { background: var(--offwhite); }
.bg-charcoal {
  background: var(--charcoal-900);
  color: #d4d8e8;
}
.bg-charcoal h1, .bg-charcoal h2, .bg-charcoal h3 { color: var(--white); }

/* ===== Inputs ===== */
.input {
  width: 100%;
  padding: 14px 16px;
  border: 1px solid var(--gray-200);
  border-radius: var(--r-md);
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--charcoal-900);
  background: var(--white);
  transition: border-color .15s, box-shadow .15s;
}
.input:focus {
  outline: none;
  border-color: var(--green-500);
  box-shadow: 0 0 0 4px rgba(46, 145, 67, 0.12);
}
.input-label {
  display: block;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 13px;
  color: var(--charcoal-700);
  margin-bottom: 8px;
}

/* ===== Subtle motion helpers ===== */
.fade-up {
  opacity: 0;
  transform: translateY(16px);
  animation: fadeUp .8s cubic-bezier(.2,.6,.2,1) forwards;
}
.fade-up.delay-1 { animation-delay: .1s; }
.fade-up.delay-2 { animation-delay: .2s; }
.fade-up.delay-3 { animation-delay: .3s; }
.fade-up.delay-4 { animation-delay: .4s; }
.fade-up.delay-5 { animation-delay: .5s; }
@keyframes fadeUp {
  to { opacity: 1; transform: translateY(0); }
}

/* ===== Divider ===== */
.divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--gray-200), transparent);
  border: 0;
  margin: 0;
}

/* ===== Scroll behavior ===== */
html { scroll-behavior: smooth; }

/* ===== Mobile niceties ===== */
@media (max-width: 880px) {
  .nav-links { display: none; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  section { padding: 64px 0; }
}