/* ============================================================
       DESIGN TOKENS
    ============================================================ */
:root {
  --brand-primary: #960E53;
  --brand-secondary: #960E53;
  --brand-dark: #960E53;
  --accent: #f4e4ed;
  --neutral-100: #ffffff;
  --neutral-200: #f7f3f5;
  --neutral-300: #e8dde3;
  --neutral-500: #9a8090;
  --neutral-700: #4a3840;
  --neutral-900: #1e1118;
  --surface: #ffffff;
  --shadow-sm: 0 2px 8px rgba(150, 15, 84, 0.08);
  --shadow-md: 0 6px 24px rgba(150, 15, 84, 0.12);
  --shadow-lg: 0 12px 40px rgba(150, 15, 84, 0.16);
  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 20px;
  --font-display: "Playfair Display", Georgia, serif;
  --font-body: "DM Sans", system-ui, sans-serif;
  --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.6;
  color: var(--neutral-700);
  background-color: var(--neutral-200);
  -webkit-font-smoothing: antialiased;
}

/* ============================================================
       TOPBAR
    ============================================================ */
.topbar {
  background: var(--neutral-900);
  color: #c9b8c3;
  font-size: 0.78rem;
  padding: 0.45rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.topbar a {
  color: #c9b8c3;
  text-decoration: none;
  transition: color var(--transition);
}

.topbar a:hover,
.topbar a:focus-visible {
  color: #fff;
}

.topbar .topbar-icon {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.topbar .social-links {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

.topbar .social-links a {
  font-size: 0.95rem;
  line-height: 1;
}

/* ============================================================
       HEADER / NAVBAR
    ============================================================ */
.site-header {
  background: var(--surface);
  box-shadow: var(--shadow-sm);
  position: sticky;
  top: 0;
  z-index: 1000;
}

.site-header .navbar-brand {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
}

.site-header .brand-logo {
  height: 52px;
  width: auto;
}

.site-header .navbar-nav .nav-link {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--neutral-700);
  padding: 0.5rem 0.85rem;
  border-radius: var(--radius-sm);
  transition:
    background var(--transition),
    color var(--transition);
}

.site-header .navbar-nav .nav-link:hover,
.site-header .navbar-nav .nav-link:focus-visible {
  background: var(--accent);
  color: var(--brand-primary);
}

.site-header .navbar-nav .nav-link.active {
  color: var(--brand-primary);
  font-weight: 600;
}

.site-header .dropdown-menu {
  border: 1px solid var(--neutral-300);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: 0.5rem;
}

.site-header .dropdown-item {
  font-size: 0.88rem;
  padding: 0.45rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}

.site-header .dropdown-item:hover {
  background: var(--accent);
  color: var(--brand-primary);
}

/* ============================================================
       TICKER / ANNOUNCEMENT BAND
    ============================================================ */
.announcement-band {
  background: linear-gradient(
    90deg,
    var(--brand-primary),
    var(--brand-secondary)
  );
  color: #fff;
  font-size: 0.83rem;
  font-weight: 500;
  padding: 0.55rem 0;
  text-align: center;
  letter-spacing: 0.01em;
}

/* ============================================================
       HERO SECTION
    ============================================================ */
.calc-hero {
  background: var(--surface);
  border-bottom: 1px solid var(--neutral-300);
  padding: 2.5rem 0 1.5rem;
}

.calc-hero h1 {
  font-family: var(--font-display);
  font-size: clamp(1.6rem, 3vw, 2.4rem);
  color: var(--neutral-900);
  margin-bottom: 0.4rem;
}

.calc-hero h1 .accent-icon {
  color: var(--brand-primary);
  margin-right: 0.5rem;
}

.calc-hero .subtitle {
  font-size: 1rem;
  color: var(--neutral-500);
  max-width: 600px;
  margin: 0 auto 0.75rem;
}

.calc-hero .disclaimer {
  font-size: 0.78rem;
  color: var(--neutral-500);
  max-width: 580px;
  margin: 0 auto;
  border-left: 3px solid var(--brand-primary);
  padding-left: 0.75rem;
  text-align: left;
}

/* ============================================================
       CALCULATOR CARD GRID
    ============================================================ */
.calc-section {
  padding: 2.5rem 0;
}

.card-panel {
  background: var(--surface);
  border: 1px solid var(--neutral-300);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  padding: 2rem;
  height: 100%;
  transition: box-shadow var(--transition);
}

.card-panel:hover {
  box-shadow: var(--shadow-md);
}

.card-panel__title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  color: var(--neutral-900);
  margin-bottom: 1.25rem;
  padding-bottom: 0.75rem;
  border-bottom: 2px solid var(--brand-primary);
}

/* ============================================================
       FORM CONTROLS
    ============================================================ */
.form-label {
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--neutral-700);
  margin-bottom: 0.3rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.form-control,
.form-select {
  font-family: var(--font-body);
  font-size: 0.95rem;
  border: 1.5px solid var(--neutral-300);
  border-radius: var(--radius-sm);
  padding: 0.55rem 0.8rem;
  color: var(--neutral-900);
  background-color: var(--neutral-200);
  transition:
    border-color var(--transition),
    box-shadow var(--transition);
}

.form-control:focus,
.form-select:focus {
  border-color: var(--brand-primary);
  box-shadow: 0 0 0 3px rgba(150, 15, 84, 0.12);
  background-color: var(--surface);
  outline: none;
}

.form-control:disabled {
  background-color: var(--neutral-200);
  cursor: not-allowed;
  opacity: 0.85;
}

.input-group-text {
  background: var(--neutral-300);
  border: 1.5px solid var(--neutral-300);
  color: var(--neutral-700);
  font-weight: 600;
  font-size: 0.9rem;
  border-radius: var(--radius-sm);
}

.input-group .form-control {
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0 !important;
}

.input-group .input-group-text:first-child {
  border-radius: var(--radius-sm) 0 0 var(--radius-sm) !important;
}

.input-group .input-group-text:last-child {
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0 !important;
}

/* ============================================================
       BUTTONS
    ============================================================ */
.btn-calc {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.6rem 1.4rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  border: none;
  min-height: 44px;
  transition:
    background var(--transition),
    transform var(--transition),
    box-shadow var(--transition);
}

.btn-calc--primary {
  background: var(--brand-primary);
  color: #fff;
}

.btn-calc--primary:hover,
.btn-calc--primary:focus-visible {
  background: var(--brand-dark);
  box-shadow: var(--shadow-md);
  transform: translateY(-1px);
  color: #fff;
}

.btn-calc--secondary {
  background: var(--neutral-900);
  color: #fff;
}

.btn-calc--secondary:hover,
.btn-calc--secondary:focus-visible {
  background: var(--neutral-700);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
  color: #fff;
}

.btn-calc:active {
  transform: translateY(0);
}

/* ============================================================
       RESULTS GRID
    ============================================================ */
.results-stat {
  background: var(--neutral-200);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  margin-bottom: 0.6rem;
}

/* ============================================================
       PAYMENTS TABLE
    ============================================================ */
.table-wrapper {
  background: var(--surface);
  border: 1px solid var(--neutral-300);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  margin-top: 1.5rem;
}

.table-wrapper .table {
  margin-bottom: 0;
  font-size: 0.88rem;
}

.table-wrapper thead th {
  background: var(--brand-primary);
  color: #fff;
  font-weight: 600;
  font-size: 0.78rem;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.85rem 0.75rem;
  border: none;
  white-space: nowrap;
}

.table-wrapper tbody tr {
  transition: background var(--transition);
}

.table-wrapper tbody tr:nth-child(odd) {
  background: var(--neutral-200);
}

.table-wrapper tbody tr:nth-child(even) {
  background: var(--surface);
}

.table-wrapper tbody tr:hover {
  background: var(--accent);
}

.table-wrapper tbody td {
  padding: 0.65rem 0.75rem;
  border-color: var(--neutral-300);
  vertical-align: middle;
}

.badge-grace {
  display: inline-block;
  background: var(--brand-primary);
  color: #fff;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  padding: 0.15em 0.55em;
  border-radius: 50px;
  vertical-align: middle;
  margin-left: 0.3rem;
}

.table-empty {
  text-align: center;
  padding: 3rem 1rem;
  color: var(--neutral-500);
}

.table-empty i {
  font-size: 2.5rem;
  display: block;
  margin-bottom: 0.75rem;
  color: var(--neutral-300);
}

/* ============================================================
       FOOTER
    ============================================================ */
.site-footer {
  background: var(--neutral-900);
  color: #a093a0;
  font-size: 0.82rem;
  padding: 2.5rem 0;
  margin-top: 3rem;
  border-top: 3px solid var(--brand-primary);
}

.site-footer a {
  color: #c9b8c3;
  text-decoration: none;
}

.site-footer a:hover {
  color: #fff;
}

.site-footer .footer-logo {
  height: 60px;
  width: auto;
  filter: brightness(0) invert(1);
  opacity: 0.7;
}

/* ============================================================
       RESPONSIVE
    ============================================================ */
@media (max-width: 767px) {
  .topbar .topbar-icon span {
    display: none;
  }

  .calc-hero {
    padding: 1.5rem 0 1rem;
  }

  .card-panel {
    padding: 1.25rem;
    margin-bottom: 1rem;
  }

  .table-wrapper {
    border-radius: var(--radius-md);
  }

  .table-wrapper .table {
    font-size: 0.78rem;
  }
}

/* ============================================================
       FOCUS RINGS (Accessibility)
    ============================================================ */
:focus-visible {
  outline: 2px solid var(--brand-primary);
  outline-offset: 3px;
}

/* ============================================================
       SKIP LINK (Accessibility)
    ============================================================ */
.skip-link {
  position: absolute;
  top: -100%;
  left: 0.5rem;
  background: var(--brand-primary);
  color: #fff;
  padding: 0.5rem 1rem;
  border-radius: 0 0 var(--radius-sm) var(--radius-sm);
  z-index: 9999;
  font-weight: 600;
}

.skip-link:focus {
  top: 0;
}

/* ============================================================
       ANIMATION: fade-in on load
    ============================================================ */
@media (prefers-reduced-motion: no-preference) {
  .fade-up {
    opacity: 0;
    transform: translateY(16px);
    animation: fadeUp 0.45s var(--transition) forwards;
  }

  .fade-up:nth-child(2) {
    animation-delay: 0.1s;
  }

  .fade-up:nth-child(3) {
    animation-delay: 0.2s;
  }

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