/* =====================================================================
   iCopilot Design System & Component Library
   design.ispbills.com
   ---------------------------------------------------------------------
   ORIGINAL identity — intentionally distinct from any existing ISPbills
   site styling (no navy/cyan dark-glass palette reused here).

   Light, editorial aesthetic. Minimalist 4-color system:
     Ink       #1B1533  Deep Indigo-Black — text, headings
     Primary   #6C4DF6  Violet            — accents, CTAs, links
     Accent    #FF7A59  Coral             — secondary highlights
     Paper     #FBFAF8  Warm Off-White    — page background
   Support: #FFFFFF surfaces, muted ink #5C566E.
   ===================================================================== */

/* ---------- Design tokens ---------- */
:root {
  /* Core palette */
  --ink: #1B1533;
  --primary: #6C4DF6;
  --primary-dark: #5638D6;
  --primary-soft: #EDE8FF;
  --accent: #FF7A59;
  --accent-dark: #F0603C;
  --accent-soft: #FFEDE6;
  --paper: #FBFAF8;

  /* Derived / semantic */
  --bg: var(--paper);
  --surface: #FFFFFF;
  --surface-alt: #F3F1FB;
  --text: #2E2A40;
  --text-heading: var(--ink);
  --text-muted: #6B6480;
  --border: #E7E3F2;
  --border-strong: #D6CFEC;
  --ring: rgba(108, 77, 246, 0.35);

  --shadow-sm: 0 2px 8px rgba(27, 21, 51, 0.06);
  --shadow: 0 14px 40px rgba(27, 21, 51, 0.10);
  --shadow-primary: 0 12px 28px rgba(108, 77, 246, 0.28);

  /* Typography */
  --font-sans: "Sora", system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  --font-heading: "Fraunces", Georgia, "Times New Roman", serif;

  /* Layout */
  --container: 1180px;
  --radius: 20px;
  --radius-sm: 12px;
  --radius-pill: 999px;
  --gap: 1.5rem;
  --header-h: 74px;

  /* Motion */
  --transition: 0.22s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-h);
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text);
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

img { max-width: 100%; height: auto; display: block; }

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition);
}
a:hover { color: var(--primary-dark); }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  color: var(--text-heading);
  line-height: 1.12;
  font-weight: 600;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.4rem, 5.5vw, 4rem); }
h2 { font-size: clamp(1.8rem, 3.6vw, 2.8rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); font-weight: 600; }

p { color: var(--text); }
ul { list-style: none; }

:focus-visible {
  outline: 3px solid var(--ring);
  outline-offset: 2px;
  border-radius: 6px;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
  }
}

/* ---------- Layout helpers ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin-inline: auto;
  padding-inline: 1.5rem;
}

.section { padding-block: clamp(3.5rem, 8vw, 6.5rem); }
.section--tight { padding-block: clamp(2rem, 5vw, 3.5rem); }
.section--alt { background: var(--surface-alt); }

.section-head {
  max-width: 720px;
  margin: 0 auto 3rem;
  text-align: center;
}
.section-head p {
  color: var(--text-muted);
  margin-top: 0.9rem;
  font-size: 1.08rem;
}

.eyebrow {
  display: inline-block;
  font-family: var(--font-sans);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 0.35rem 0.9rem;
  border-radius: var(--radius-pill);
  margin-bottom: 1rem;
}

.accent { color: var(--primary); }
.text-muted { color: var(--text-muted); }
.center { text-align: center; }

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--primary);
  color: #fff;
  padding: 0.6rem 1rem;
  z-index: 200;
  font-weight: 600;
  border-radius: 0 0 var(--radius-sm) 0;
}
.skip-link:focus { left: 0; }

/* Responsive grid */
.grid { display: grid; gap: var(--gap); }
.grid-2 { grid-template-columns: repeat(2, 1fr); }
.grid-3 { grid-template-columns: repeat(3, 1fr); }
.grid-4 { grid-template-columns: repeat(4, 1fr); }

@media (max-width: 900px) {
  .grid-3, .grid-4 { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 600px) {
  .grid-2, .grid-3, .grid-4 { grid-template-columns: 1fr; }
}

/* =====================================================================
   COMPONENT: Buttons
   ===================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: 0.85rem 1.7rem;
  border-radius: var(--radius-pill);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  border: 2px solid transparent;
  transition: transform var(--transition), background var(--transition),
    border-color var(--transition), box-shadow var(--transition), color var(--transition);
  text-align: center;
  line-height: 1.2;
}
.btn:hover { transform: translateY(-2px); }
.btn:active { transform: translateY(0); }

.btn--primary {
  background: var(--primary);
  color: #fff;
  box-shadow: var(--shadow-primary);
}
.btn--primary:hover { background: var(--primary-dark); color: #fff; }

.btn--accent {
  background: var(--accent);
  color: #fff;
}
.btn--accent:hover { background: var(--accent-dark); color: #fff; }

.btn--outline {
  background: transparent;
  color: var(--primary);
  border-color: var(--border-strong);
}
.btn--outline:hover {
  border-color: var(--primary);
  background: var(--primary-soft);
  color: var(--primary-dark);
}

.btn--ghost { background: transparent; color: var(--text); }
.btn--ghost:hover { color: var(--primary); }

.btn--block { width: 100%; }
.btn--lg { padding: 1.05rem 2.1rem; font-size: 1.1rem; }

/* =====================================================================
   COMPONENT: Cards
   ===================================================================== */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.9rem;
  transition: transform var(--transition), border-color var(--transition),
    box-shadow var(--transition);
  height: 100%;
  box-shadow: var(--shadow-sm);
}
.card:hover {
  transform: translateY(-5px);
  border-color: var(--border-strong);
  box-shadow: var(--shadow);
}
.card__icon {
  width: 52px;
  height: 52px;
  display: grid;
  place-items: center;
  font-size: 1.6rem;
  border-radius: var(--radius-sm);
  background: var(--primary-soft);
  margin-bottom: 1.1rem;
}
.card--accent .card__icon { background: var(--accent-soft); }
.card h3 { margin-bottom: 0.5rem; }
.card p { color: var(--text-muted); font-size: 0.97rem; }

/* Blog preview card */
.post-card {
  display: flex;
  flex-direction: column;
  overflow: hidden;
  padding: 0;
}
.post-card__media {
  aspect-ratio: 16 / 9;
  background: linear-gradient(135deg, var(--primary), var(--accent));
  display: grid;
  place-items: center;
  font-size: 2.6rem;
  color: #fff;
}
.post-card__body {
  padding: 1.6rem;
  display: flex;
  flex-direction: column;
  flex: 1;
}
.post-card__tag {
  align-self: flex-start;
  font-family: var(--font-sans);
  font-size: 0.72rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--primary);
  background: var(--primary-soft);
  padding: 0.28rem 0.7rem;
  border-radius: var(--radius-pill);
  margin-bottom: 0.85rem;
}
.post-card__meta {
  margin-top: auto;
  padding-top: 1rem;
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* =====================================================================
   COMPONENT: Header / Navigation
   ===================================================================== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  background: rgba(251, 250, 248, 0.82);
  backdrop-filter: blur(14px) saturate(1.4);
  -webkit-backdrop-filter: blur(14px) saturate(1.4);
  border-bottom: 1px solid var(--border);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}

.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1.3rem;
  color: var(--ink);
}
.brand:hover { color: var(--ink); }
.brand__logo { width: 36px; height: 36px; }
.brand__name b { color: var(--primary); }

.nav {
  display: flex;
  align-items: center;
  gap: 1.85rem;
}
.nav a {
  color: var(--text);
  font-weight: 500;
  font-size: 0.98rem;
  position: relative;
}
.nav a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: -7px;
  width: 0;
  height: 2px;
  border-radius: 2px;
  background: var(--primary);
  transition: width var(--transition);
}
.nav a:hover,
.nav a[aria-current="page"] { color: var(--primary); }
.nav a:hover::after,
.nav a[aria-current="page"]::after { width: 100%; }

.header-actions { display: flex; align-items: center; gap: 0.75rem; }

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
}
.nav-toggle span {
  width: 24px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

@media (max-width: 860px) {
  .nav-toggle { display: flex; }
  .nav {
    position: fixed;
    inset: var(--header-h) 0 auto 0;
    flex-direction: column;
    align-items: flex-start;
    gap: 0;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    box-shadow: var(--shadow);
    padding: 0.5rem 1.5rem 1.5rem;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease;
  }
  .nav.is-open { max-height: 80vh; }
  .nav a { width: 100%; padding: 0.9rem 0; border-bottom: 1px solid var(--border); }
  .nav a::after { display: none; }
}

/* =====================================================================
   COMPONENT: Hero
   ===================================================================== */
.hero {
  position: relative;
  padding-block: clamp(3.5rem, 10vw, 7rem);
  text-align: center;
  overflow: hidden;
}
.hero::before {
  content: "";
  position: absolute;
  inset: 0;
  background:
    radial-gradient(52% 55% at 50% 0%, rgba(108, 77, 246, 0.14), transparent 70%),
    radial-gradient(40% 42% at 85% 15%, rgba(255, 122, 89, 0.12), transparent 70%);
  pointer-events: none;
}
.hero .container { position: relative; }
.hero p.lead {
  max-width: 640px;
  margin: 1.4rem auto 2.2rem;
  font-size: clamp(1.08rem, 2vw, 1.3rem);
  color: var(--text-muted);
}
.hero-actions {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
}

/* Stats */
.stats {
  display: flex;
  flex-wrap: wrap;
  gap: 2.75rem;
  justify-content: center;
  margin-top: 3.5rem;
}
.stat { text-align: center; }
.stat b {
  display: block;
  font-family: var(--font-heading);
  font-size: clamp(1.9rem, 4vw, 2.7rem);
  color: var(--primary);
}
.stat span { color: var(--text-muted); font-size: 0.9rem; }

/* =====================================================================
   COMPONENT: Search bar
   ===================================================================== */
.searchbar {
  position: relative;
  max-width: 480px;
  margin: 0 auto 2.75rem;
}
.searchbar input {
  width: 100%;
  padding: 0.9rem 1rem 0.9rem 2.85rem;
  border-radius: var(--radius-pill);
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  box-shadow: var(--shadow-sm);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.searchbar input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--ring);
  outline: none;
}
.searchbar svg {
  position: absolute;
  left: 1.05rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
}
.search-empty { text-align: center; color: var(--text-muted); padding: 2rem; }

/* =====================================================================
   COMPONENT: FAQ accordion
   ===================================================================== */
.accordion { max-width: 760px; margin: 0 auto; }
.accordion__item {
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  margin-bottom: 0.85rem;
  overflow: hidden;
  background: var(--surface);
  box-shadow: var(--shadow-sm);
}
.accordion__trigger {
  width: 100%;
  text-align: left;
  background: none;
  border: none;
  color: var(--text-heading);
  font-family: var(--font-sans);
  font-size: 1.05rem;
  font-weight: 600;
  padding: 1.15rem 1.35rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.accordion__trigger .icon {
  flex-shrink: 0;
  transition: transform var(--transition);
  color: var(--primary);
}
.accordion__trigger[aria-expanded="true"] .icon { transform: rotate(45deg); }
.accordion__panel { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.accordion__panel p { padding: 0 1.35rem 1.25rem; color: var(--text-muted); }

/* =====================================================================
   COMPONENT: Forms
   ===================================================================== */
.form { max-width: 640px; margin: 0 auto; }
.form__row { margin-bottom: 1.3rem; }
.form__row label {
  display: block;
  margin-bottom: 0.45rem;
  font-weight: 500;
  color: var(--text-heading);
  font-size: 0.95rem;
}
.form__row .req { color: var(--accent); }
.form input,
.form textarea,
.form select {
  width: 100%;
  padding: 0.85rem 1rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  font-family: inherit;
  font-size: 1rem;
  transition: border-color var(--transition), box-shadow var(--transition);
}
.form input:focus,
.form textarea:focus,
.form select:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 4px var(--ring);
  outline: none;
}
.form textarea { resize: vertical; min-height: 150px; }

.form input[aria-invalid="true"],
.form textarea[aria-invalid="true"] { border-color: var(--accent-dark); }
.form__error {
  display: block;
  color: var(--accent-dark);
  font-size: 0.85rem;
  margin-top: 0.35rem;
  min-height: 1em;
}
.form__hp { position: absolute; left: -9999px; opacity: 0; height: 0; width: 0; }
.form__status {
  margin-top: 1rem;
  padding: 0.95rem 1rem;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  display: none;
}
.form__status.is-success {
  display: block;
  background: var(--primary-soft);
  border: 1px solid var(--border-strong);
  color: var(--primary-dark);
}
.form__status.is-error {
  display: block;
  background: var(--accent-soft);
  border: 1px solid var(--accent);
  color: var(--accent-dark);
}

/* =====================================================================
   COMPONENT: Modal
   ===================================================================== */
.modal {
  position: fixed;
  inset: 0;
  z-index: 300;
  display: none;
  align-items: center;
  justify-content: center;
  padding: 1.25rem;
  background: rgba(27, 21, 51, 0.55);
  backdrop-filter: blur(4px);
}
.modal.is-open { display: flex; }
.modal__dialog {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  max-width: 480px;
  width: 100%;
  padding: 2.25rem;
  box-shadow: var(--shadow);
  position: relative;
}
.modal__close {
  position: absolute;
  top: 0.9rem;
  right: 0.9rem;
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.5rem;
  line-height: 1;
  cursor: pointer;
}
.modal__close:hover { color: var(--primary); }

/* =====================================================================
   COMPONENT: CTA band
   ===================================================================== */
.cta-band {
  background: linear-gradient(135deg, var(--primary), var(--primary-dark));
  border-radius: var(--radius);
  padding: clamp(2.25rem, 5vw, 3.75rem);
  text-align: center;
  color: #fff;
  box-shadow: var(--shadow-primary);
}
.cta-band h2 { color: #fff; margin-bottom: 0.85rem; }
.cta-band p { color: rgba(255, 255, 255, 0.9); max-width: 560px; margin: 0 auto 1.85rem; }
.cta-band .btn--primary { background: #fff; color: var(--primary-dark); box-shadow: none; }
.cta-band .btn--primary:hover { background: var(--paper); color: var(--primary-dark); }
.cta-band .btn--outline { color: #fff; border-color: rgba(255, 255, 255, 0.6); }
.cta-band .btn--outline:hover { background: rgba(255, 255, 255, 0.12); border-color: #fff; color: #fff; }

/* =====================================================================
   COMPONENT: Team
   ===================================================================== */
.team-member { text-align: center; }
.team-member .avatar {
  width: 88px;
  height: 88px;
  border-radius: 50%;
  margin: 0 auto 1rem;
  display: grid;
  place-items: center;
  font-family: var(--font-heading);
  font-size: 1.8rem;
  font-weight: 600;
  color: #fff;
  background: linear-gradient(135deg, var(--primary), var(--accent));
}
.team-member h3 { font-size: 1.1rem; margin-bottom: 0.2rem; }
.team-member span { color: var(--primary); font-size: 0.9rem; font-family: var(--font-sans); }
.team-member p { color: var(--text-muted); font-size: 0.9rem; margin-top: 0.5rem; }

/* =====================================================================
   COMPONENT: Pagination
   ===================================================================== */
.pagination {
  display: flex;
  gap: 0.5rem;
  justify-content: center;
  align-items: center;
  margin-top: 2.75rem;
  flex-wrap: wrap;
}
.pagination button {
  min-width: 44px;
  height: 44px;
  padding: 0 0.75rem;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-strong);
  background: var(--surface);
  color: var(--text);
  font-family: var(--font-sans);
  font-weight: 600;
  cursor: pointer;
  transition: background var(--transition), border-color var(--transition), color var(--transition);
}
.pagination button:hover:not(:disabled) { border-color: var(--primary); color: var(--primary); }
.pagination button[aria-current="true"] {
  background: var(--primary);
  border-color: var(--primary);
  color: #fff;
}
.pagination button:disabled { opacity: 0.4; cursor: not-allowed; }

/* =====================================================================
   COMPONENT: Footer
   ===================================================================== */
.site-footer {
  margin-top: auto;
  background: var(--ink);
  color: #C9C3DE;
  padding-block: 3.5rem 1.5rem;
}
.site-footer h4, .site-footer .brand { color: #fff; }
.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr repeat(3, 1fr);
  gap: 2rem;
}
@media (max-width: 760px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 460px) { .footer-grid { grid-template-columns: 1fr; } }
.footer-col h4 {
  font-family: var(--font-sans);
  font-size: 0.82rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: #A79FC4;
  margin-bottom: 1rem;
}
.footer-col ul li { margin-bottom: 0.6rem; }
.footer-col a { color: #C9C3DE; font-size: 0.95rem; }
.footer-col a:hover { color: var(--accent); }
.footer-about p { color: #A79FC4; font-size: 0.95rem; margin-top: 0.85rem; max-width: 320px; }
.footer-about .brand__name { color: #fff; }

.social { display: flex; gap: 0.75rem; margin-top: 1.1rem; }
.social a {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  display: grid;
  place-items: center;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.12);
  color: #fff;
  transition: transform var(--transition), background var(--transition), border-color var(--transition);
}
.social a:hover {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
  transform: translateY(-2px);
}

.footer-bottom {
  margin-top: 2.75rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1rem;
  flex-wrap: wrap;
  color: #A79FC4;
  font-size: 0.88rem;
}

/* =====================================================================
   COMPONENT: Cookie consent banner (GDPR)
   ===================================================================== */
.cookie-banner {
  position: fixed;
  left: 1rem;
  right: 1rem;
  bottom: 1rem;
  z-index: 250;
  max-width: 560px;
  margin: 0 auto;
  background: var(--surface);
  border: 1px solid var(--border-strong);
  border-radius: var(--radius);
  padding: 1.35rem 1.6rem;
  box-shadow: var(--shadow);
  display: none;
  gap: 1rem;
  align-items: center;
  flex-wrap: wrap;
  justify-content: space-between;
}
.cookie-banner.is-visible { display: flex; }
.cookie-banner p { font-size: 0.9rem; color: var(--text-muted); flex: 1 1 260px; margin: 0; }
.cookie-banner .cookie-actions { display: flex; gap: 0.6rem; flex-wrap: wrap; }

/* ---------- Scroll reveal ---------- */
.reveal {
  opacity: 0;
  transform: translateY(22px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.reveal.is-visible { opacity: 1; transform: none; }

/* ---------- Utility spacing ---------- */
.mt-1 { margin-top: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-0 { margin-bottom: 0; }
.items-start { align-items: start; }
.hidden { display: none !important; }