/* ============================================
   STACKD — SHARED STYLES
   Used on every page
   ============================================ */

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

:root {
  --green:        #1D9E75;
  --green-light:  #E1F5EE;
  --green-dark:   #0F6E56;
  --red:          #D85A30;
  --red-light:    #FCEBEB;
  --amber:        #BA7517;
  --amber-light:  #FAEEDA;
  --gray-50:      #F8F9FA;
  --gray-100:     #F1F3F4;
  --gray-200:     #E8EAED;
  --gray-400:     #9AA0A6;
  --gray-600:     #5F6368;
  --gray-800:     #3C4043;
  --gray-900:     #1A1A1A;
  --border:       rgba(0,0,0,0.09);
  --border-mid:   rgba(0,0,0,0.15);
  --radius:       8px;
  --radius-lg:    12px;
  --radius-xl:    16px;
  --shadow-sm:    0 1px 3px rgba(0,0,0,0.06);
  --shadow-md:    0 4px 12px rgba(0,0,0,0.08);
  --transition:   0.15s ease;
}

html { scroll-behavior: smooth; }

body {
  font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', sans-serif;
  background: #fff;
  color: var(--gray-900);
  font-size: 15px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

/* ---- LOGO ---- */
.logo {
  font-size: 20px;
  font-weight: 600;
  letter-spacing: -0.5px;
  text-decoration: none;
  color: var(--gray-900);
}
.logo span { color: var(--green); }

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 9px 20px;
  border-radius: var(--radius);
  font-size: 14px;
  font-weight: 500;
  font-family: inherit;
  cursor: pointer;
  text-decoration: none;
  border: none;
  transition: opacity var(--transition), background var(--transition), transform var(--transition);
  white-space: nowrap;
}
.btn:active { transform: scale(0.98); }

.btn-primary { background: var(--green); color: #fff; }
.btn-primary:hover { opacity: 0.9; }

.btn-outline { background: transparent; color: var(--gray-900); border: 0.5px solid var(--border-mid); }
.btn-outline:hover { background: var(--gray-50); }

.btn-ghost { background: transparent; color: var(--gray-600); border: none; }
.btn-ghost:hover { background: var(--gray-100); color: var(--gray-900); }

.btn-danger { background: transparent; color: var(--red); border: 0.5px solid var(--red); }
.btn-danger:hover { background: var(--red-light); }

.btn-lg { padding: 11px 26px; font-size: 15px; }
.btn-sm { padding: 6px 14px; font-size: 13px; }
.btn-full { width: 100%; }

/* ---- NAV ---- */
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 2rem;
  height: 60px;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  border-bottom: 0.5px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
  transition: box-shadow var(--transition);
}
.nav.scrolled { box-shadow: var(--shadow-sm); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.25rem;
}
.nav-link {
  font-size: 14px;
  color: var(--gray-600);
  text-decoration: none;
  padding: 6px 12px;
  border-radius: var(--radius);
  transition: color var(--transition), background var(--transition);
}
.nav-link:hover { color: var(--gray-900); background: var(--gray-100); }
.nav-link.active { color: var(--gray-900); font-weight: 500; }

.nav-actions { display: flex; align-items: center; gap: 8px; margin-left: 1rem; }

/* Hamburger */
.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 6px;
  border-radius: var(--radius);
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--gray-900);
  border-radius: 2px;
  transition: all 0.2s ease;
}
.nav-hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---- TYPOGRAPHY ---- */
h1 { font-size: 48px; font-weight: 600; letter-spacing: -1.5px; line-height: 1.1; }
h2 { font-size: 32px; font-weight: 600; letter-spacing: -0.5px; line-height: 1.2; margin-bottom: 0.5rem; }
h3 { font-size: 18px; font-weight: 600; margin-bottom: 0.5rem; }

.eyebrow {
  font-size: 12px;
  font-weight: 600;
  letter-spacing: 1px;
  text-transform: uppercase;
  color: var(--green);
  margin-bottom: 0.75rem;
}

/* ---- SECTIONS ---- */
.section { padding: 5rem 2rem; }
.section-alt { background: var(--gray-50); border-top: 0.5px solid var(--border); border-bottom: 0.5px solid var(--border); }
.section-inner { max-width: 960px; margin: 0 auto; }
.section-sub { font-size: 17px; color: var(--gray-600); margin-bottom: 3rem; max-width: 560px; }
.text-center { text-align: center; }
.text-center .section-sub { margin-left: auto; margin-right: auto; }

/* ---- BADGES ---- */
.badge { font-size: 11px; padding: 2px 9px; border-radius: 20px; font-weight: 500; display: inline-block; }
.badge-closed { background: var(--green-light); color: var(--green-dark); }
.badge-pending { background: var(--amber-light); color: var(--amber); }
.badge-disputed { background: var(--red-light); color: var(--red); }

/* ---- COLORS ---- */
.positive { color: var(--green-dark); }
.warning { color: var(--amber); }
.negative { color: var(--red); }
.gap-ok { color: var(--green); font-size: 13px; }
.gap-neg { color: var(--red); font-size: 13px; font-weight: 500; }

/* ---- FOOTER ---- */
.footer {
  border-top: 0.5px solid var(--border);
  padding: 3rem 2rem 0;
}
.footer-inner {
  max-width: 960px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  gap: 3rem;
  padding-bottom: 3rem;
  flex-wrap: wrap;
}
.footer-brand { display: flex; flex-direction: column; gap: 0.5rem; }
.footer-tagline { font-size: 13px; color: var(--gray-600); }
.footer-links-group { display: flex; gap: 4rem; }
.footer-col { display: flex; flex-direction: column; gap: 0.75rem; }
.footer-col-title { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; color: var(--gray-900); margin-bottom: 0.25rem; }
.footer-link { font-size: 14px; color: var(--gray-600); text-decoration: none; transition: color var(--transition); }
.footer-link:hover { color: var(--gray-900); }
.footer-bottom {
  max-width: 960px;
  margin: 0 auto;
  padding: 1.25rem 0;
  border-top: 0.5px solid var(--border);
  font-size: 13px;
  color: var(--gray-600);
}

/* ---- COOKIE BANNER ---- */
.cookie-banner {
  display: none;
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%);
  background: var(--gray-900);
  color: #fff;
  padding: 12px 20px;
  border-radius: var(--radius-lg);
  font-size: 13px;
  align-items: center;
  gap: 16px;
  z-index: 999;
  box-shadow: var(--shadow-md);
  white-space: nowrap;
}
.cookie-banner a { color: var(--green); text-decoration: none; }

/* ---- TOAST ---- */
.toast {
  position: fixed;
  bottom: 1.5rem;
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: var(--gray-900);
  color: #fff;
  padding: 10px 20px;
  border-radius: var(--radius);
  font-size: 13px;
  font-weight: 500;
  opacity: 0;
  transition: all 0.25s ease;
  z-index: 9999;
  white-space: nowrap;
  pointer-events: none;
}
.toast.show { opacity: 1; transform: translateX(-50%) translateY(0); }
.toast.error { background: var(--red); }
.toast.success { background: var(--green-dark); }

/* ---- INPUTS ---- */
input, select, textarea {
  width: 100%;
  padding: 10px 14px;
  border: 0.5px solid var(--border-mid);
  border-radius: var(--radius);
  font-size: 14px;
  font-family: inherit;
  background: #fff;
  color: var(--gray-900);
  outline: none;
  transition: border-color var(--transition), box-shadow var(--transition);
}
input:focus, select:focus, textarea:focus {
  border-color: var(--green);
  box-shadow: 0 0 0 3px rgba(29,158,117,0.1);
}
input:disabled, select:disabled {
  background: var(--gray-100);
  cursor: not-allowed;
  opacity: 0.7;
}
input::placeholder { color: var(--gray-400); }

/* ---- LOADING SPINNER ---- */
.spinner {
  width: 20px; height: 20px;
  border: 2px solid var(--gray-200);
  border-top-color: var(--green);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  display: inline-block;
}
@keyframes spin { to { transform: rotate(360deg); } }

.loading-state {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  padding: 3rem;
  color: var(--gray-600);
  font-size: 14px;
}

/* ---- SKELETON LOADER ---- */
.skeleton {
  background: linear-gradient(90deg, var(--gray-100) 25%, var(--gray-50) 50%, var(--gray-100) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.2s infinite;
  border-radius: var(--radius);
}
@keyframes shimmer { to { background-position: -200% 0; } }

/* ---- RESPONSIVE ---- */
@media (max-width: 768px) {
  h1 { font-size: 32px; }
  h2 { font-size: 26px; }
  .section { padding: 3.5rem 1.25rem; }
  .nav { padding: 0 1.25rem; }
  .nav-hamburger { display: flex; }
  .nav-links {
    display: none;
    position: absolute;
    top: 60px;
    left: 0;
    right: 0;
    background: #fff;
    border-bottom: 0.5px solid var(--border);
    flex-direction: column;
    align-items: stretch;
    padding: 1rem 1.25rem;
    gap: 4px;
    box-shadow: var(--shadow-md);
  }
  .nav-links.open { display: flex; }
  .nav-link { padding: 10px 12px; }
  .nav-actions {
    margin-left: 0;
    margin-top: 0.5rem;
    flex-direction: column;
    gap: 8px;
  }
  .nav-actions .btn { width: 100%; justify-content: center; }
  .footer-inner { flex-direction: column; gap: 2rem; }
  .footer-links-group { gap: 2rem; }
  .cookie-banner { width: calc(100% - 2rem); white-space: normal; }
}