/* ==========================================================================
   Cloud College — Components
   ========================================================================== */

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--header-h);
  display: flex;
  align-items: center;
  border-bottom: 1px solid transparent;
  transition: background var(--dur) var(--ease), border-color var(--dur) var(--ease), backdrop-filter var(--dur) var(--ease);
}
.site-header.is-scrolled {
  background: hsl(222 47% 6% / 0.78);
  backdrop-filter: blur(16px) saturate(140%);
  -webkit-backdrop-filter: blur(16px) saturate(140%);
  border-bottom-color: var(--border);
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-5);
}

.logo {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.02em;
  color: var(--text);
}
.logo:hover { color: var(--text); }
.logo svg { width: 38px; height: 38px; flex-shrink: 0; transition: transform var(--dur) var(--ease); }
.logo:hover svg { transform: translateY(-2px) rotate(-4deg); }
.logo span b { font-weight: 700; background: var(--grad-text); -webkit-background-clip: text; background-clip: text; color: transparent; }

.nav { display: flex; align-items: center; gap: var(--space-2); }
.nav__list { display: flex; align-items: center; gap: var(--space-1); }
.nav__link {
  position: relative;
  display: block;
  padding: 0.5rem 0.85rem;
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-soft);
  border-radius: var(--r-pill);
  transition: color var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.nav__link:hover { color: var(--text); background: hsl(215 40% 60% / 0.08); }
.nav__link[aria-current="page"] { color: var(--text); }
.nav__link[aria-current="page"]::after {
  content: "";
  position: absolute;
  left: 50%;
  bottom: 2px;
  width: 16px;
  height: 2px;
  border-radius: 2px;
  background: var(--grad-brand);
  transform: translateX(-50%);
}
.nav__cta { margin-left: var(--space-3); }

.nav-toggle {
  display: none;
  width: 44px;
  height: 44px;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border);
  border-radius: var(--r-sm);
  background: var(--surface);
  cursor: pointer;
}
.nav-toggle span,
.nav-toggle span::before,
.nav-toggle span::after {
  display: block;
  width: 18px;
  height: 2px;
  border-radius: 2px;
  background: var(--text);
  transition: transform var(--dur) var(--ease), opacity var(--dur) var(--ease);
  position: relative;
}
.nav-toggle span::before,
.nav-toggle span::after { content: ""; position: absolute; left: 0; }
.nav-toggle span::before { top: -6px; }
.nav-toggle span::after { top: 6px; }
.nav-open .nav-toggle span { background: transparent; }
.nav-open .nav-toggle span::before { transform: translateY(6px) rotate(45deg); }
.nav-open .nav-toggle span::after { transform: translateY(-6px) rotate(-45deg); }

@media (max-width: 1080px) {
  .nav-toggle { display: inline-flex; }
  .nav {
    position: fixed;
    inset: var(--header-h) 0 0 0;
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-5);
    padding: var(--space-6) clamp(1.25rem, 4vw, 2rem);
    background: hsl(222 47% 6% / 0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    opacity: 0;
    visibility: hidden;
    transform: translateY(-12px);
    transition: opacity var(--dur) var(--ease), transform var(--dur) var(--ease), visibility var(--dur);
    overflow-y: auto;
  }
  .nav-open .nav { opacity: 1; visibility: visible; transform: none; }
  .nav__list { flex-direction: column; align-items: stretch; gap: 0; }
  .nav__link { padding: 1rem 0.25rem; font-size: var(--fs-lg); font-family: var(--font-display); border-radius: 0; border-bottom: 1px solid var(--border); }
  .nav__link:hover { background: none; }
  .nav__link[aria-current="page"]::after { left: auto; right: 0.25rem; bottom: 50%; transform: translateY(50%); width: 8px; height: 8px; border-radius: 50%; }
  .nav__cta { margin: 0; }
  .nav__cta .btn { width: 100%; }
  .nav-open { overflow: hidden; }
}

/* ---------- Buttons ---------- */
.btn {
  --btn-pad-y: 0.85rem;
  --btn-pad-x: 1.5rem;
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.55rem;
  padding: var(--btn-pad-y) var(--btn-pad-x);
  border: 1px solid transparent;
  border-radius: var(--r-pill);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: var(--fs-base);
  line-height: 1.2;
  letter-spacing: -0.005em;
  white-space: nowrap;
  cursor: pointer;
  isolation: isolate;
  transition: transform var(--dur-fast) var(--ease), box-shadow var(--dur) var(--ease), background var(--dur) var(--ease), color var(--dur) var(--ease), border-color var(--dur) var(--ease);
}
.btn svg { width: 18px; height: 18px; transition: transform var(--dur) var(--ease); }
.btn:hover svg { transform: translateX(3px); }
.btn:active { transform: translateY(1px) scale(0.99); }

.btn--primary {
  color: hsl(222 47% 7%);
  background: var(--grad-brand);
  background-size: 160% 160%;
  box-shadow: 0 10px 30px -10px hsl(199 95% 55% / 0.65);
  animation: grad-shift 6s ease infinite;
}
.btn--primary:hover {
  color: hsl(222 47% 5%);
  transform: translateY(-2px);
  box-shadow: 0 16px 40px -10px hsl(258 90% 66% / 0.7);
}

.btn--ghost {
  color: var(--text);
  background: hsl(215 40% 60% / 0.06);
  border-color: var(--border-strong);
  backdrop-filter: blur(8px);
}
.btn--ghost:hover { color: var(--text); border-color: var(--primary); background: var(--primary-soft); transform: translateY(-2px); }

.btn--sm { --btn-pad-y: 0.6rem; --btn-pad-x: 1.1rem; font-size: var(--fs-sm); }
.btn--lg { --btn-pad-y: 1.05rem; --btn-pad-x: 1.9rem; font-size: var(--fs-md); }

.btn-row { display: flex; flex-wrap: wrap; gap: var(--space-3); }

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  font-weight: 600;
  font-size: var(--fs-sm);
}
.link-arrow svg { width: 16px; height: 16px; transition: transform var(--dur) var(--ease); }
.link-arrow:hover svg { transform: translateX(4px); }

@keyframes grad-shift {
  0%, 100% { background-position: 0% 50%; }
  50% { background-position: 100% 50%; }
}

/* ---------- Cards ---------- */
.card {
  position: relative;
  padding: var(--space-6);
  background: var(--grad-surface);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  transition: transform var(--dur) var(--ease), border-color var(--dur) var(--ease), box-shadow var(--dur) var(--ease), background var(--dur) var(--ease);
  overflow: hidden;
}
.card::before {
  content: "";
  position: absolute;
  inset: 0;
  border-radius: inherit;
  padding: 1px;
  background: linear-gradient(140deg, hsl(199 95% 60% / 0.55), transparent 40%, transparent 60%, hsl(258 90% 70% / 0.45));
  -webkit-mask: linear-gradient(#000 0 0) content-box, linear-gradient(#000 0 0);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity var(--dur) var(--ease);
  pointer-events: none;
}
.card--hover:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.card--hover:hover::before { opacity: 1; }
.card h3 { margin-bottom: var(--space-3); }
.card p { color: var(--muted); font-size: 0.97rem; }

.icon-tile {
  display: inline-grid;
  place-items: center;
  width: 52px;
  height: 52px;
  margin-bottom: var(--space-5);
  border-radius: var(--r-md);
  background: linear-gradient(140deg, var(--primary-soft), var(--accent-soft));
  border: 1px solid var(--border-strong);
  color: var(--primary);
  transition: transform var(--dur) var(--ease);
}
.icon-tile svg { width: 26px; height: 26px; }
.card--hover:hover .icon-tile { transform: scale(1.06) rotate(-3deg); }

/* ---------- Badges / tags ---------- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  padding: 0.3rem 0.7rem;
  border-radius: var(--r-pill);
  font-size: var(--fs-xs);
  font-weight: 600;
  letter-spacing: 0.02em;
  border: 1px solid var(--border-strong);
  background: hsl(215 40% 60% / 0.06);
  color: var(--text-soft);
}
.badge--fundamentals { color: hsl(158 64% 62%); background: var(--success-soft); border-color: hsl(158 64% 52% / 0.35); }
.badge--associate { color: hsl(199 95% 68%); background: var(--primary-soft); border-color: hsl(199 95% 55% / 0.35); }
.badge--expert { color: hsl(258 90% 78%); background: var(--accent-soft); border-color: hsl(258 90% 66% / 0.4); }
.badge--specialty { color: hsl(38 95% 66%); background: hsl(38 95% 55% / 0.12); border-color: hsl(38 95% 55% / 0.35); }

.tag-list { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.tag {
  font-size: var(--fs-xs);
  color: var(--muted);
  padding: 0.2rem 0.6rem;
  border-radius: var(--r-pill);
  background: hsl(215 40% 60% / 0.07);
}

/* ---------- Checklist ---------- */
.checklist { display: grid; gap: var(--space-3); }
.checklist li { display: flex; gap: 0.75rem; align-items: flex-start; color: var(--text-soft); }
.checklist li::before {
  content: "";
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  margin-top: 1px;
  border-radius: 50%;
  background:
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2306111f' stroke-width='3' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M5 12.5l4.5 4.5L19 7.5'/%3E%3C/svg%3E") center/13px no-repeat,
    var(--grad-brand);
}

/* ---------- Steps / timeline ---------- */
.steps { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-5); counter-reset: step; position: relative; }
.steps::before {
  content: "";
  position: absolute;
  top: 28px;
  left: 8%;
  right: 8%;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--primary), var(--accent), transparent);
  opacity: 0.4;
}
.step { position: relative; text-align: center; padding-inline: var(--space-2); }
.step__num {
  position: relative;
  display: grid;
  place-items: center;
  width: 56px;
  height: 56px;
  margin: 0 auto var(--space-5);
  border-radius: 50%;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.2rem;
  color: var(--text);
  background: var(--bg);
  border: 1px solid var(--border-strong);
  box-shadow: 0 0 0 6px var(--bg), var(--glow-primary);
}
.step h3 { margin-bottom: var(--space-2); }
.step p { color: var(--muted); font-size: 0.95rem; }

@media (max-width: 900px) {
  .steps { grid-template-columns: 1fr; gap: var(--space-6); }
  .steps::before { top: 0; bottom: 0; left: 27px; right: auto; width: 2px; height: auto; background: linear-gradient(180deg, var(--primary), var(--accent)); }
  .step { display: grid; grid-template-columns: 56px 1fr; gap: var(--space-5); text-align: left; padding: 0; }
  .step__num { margin: 0; }
}

/* ---------- Accordion (FAQ) ---------- */
.accordion { display: grid; gap: var(--space-3); }
.accordion__item {
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--surface);
  transition: border-color var(--dur) var(--ease), background var(--dur) var(--ease);
}
.accordion__item.is-open { border-color: var(--border-strong); background: var(--surface-hover); }
.accordion__trigger {
  display: flex;
  width: 100%;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
  padding: 1.2rem 1.4rem;
  border: 0;
  background: none;
  text-align: left;
  font-family: var(--font-display);
  font-size: var(--fs-md);
  font-weight: 600;
  color: var(--text);
  cursor: pointer;
}
.accordion__icon {
  position: relative;
  flex-shrink: 0;
  width: 28px;
  height: 28px;
  border-radius: 50%;
  border: 1px solid var(--border-strong);
  transition: transform var(--dur) var(--ease), background var(--dur) var(--ease);
}
.accordion__icon::before,
.accordion__icon::after {
  content: "";
  position: absolute;
  top: 50%; left: 50%;
  width: 10px; height: 2px;
  border-radius: 2px;
  background: var(--primary);
  transform: translate(-50%, -50%);
}
.accordion__icon::after { transform: translate(-50%, -50%) rotate(90deg); transition: transform var(--dur) var(--ease); }
.accordion__item.is-open .accordion__icon { background: var(--primary-soft); transform: rotate(180deg); }
.accordion__item.is-open .accordion__icon::after { transform: translate(-50%, -50%) rotate(0deg); }
.accordion__panel {
  display: grid;
  grid-template-rows: 0fr;
  transition: grid-template-rows var(--dur) var(--ease);
}
.accordion__item.is-open .accordion__panel { grid-template-rows: 1fr; }
.accordion__panel > div { overflow: hidden; }
.accordion__panel p { padding: 0 1.4rem 1.3rem; color: var(--muted); margin: 0; }

/* ---------- Page hero (inner pages) ---------- */
.page-hero {
  position: relative;
  padding-block: clamp(4rem, 3rem + 5vw, 7rem) clamp(3rem, 2rem + 3vw, 5rem);
  overflow: hidden;
}
.page-hero h1 { max-width: 18ch; }
.page-hero .lead { margin-top: var(--space-4); }
.page-hero__glow {
  position: absolute;
  inset: -20% -10% auto auto;
  width: 46rem;
  height: 46rem;
  border-radius: 50%;
  background: radial-gradient(circle, hsl(199 95% 55% / 0.18), hsl(258 90% 66% / 0.1) 40%, transparent 70%);
  filter: blur(20px);
  pointer-events: none;
  animation: drift 18s ease-in-out infinite alternate;
}

/* ---------- Ambient blobs ---------- */
.blob {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  opacity: 0.55;
  pointer-events: none;
  z-index: -1;
  animation: drift 20s ease-in-out infinite alternate;
}
.blob--cyan { background: hsl(199 95% 50% / 0.45); }
.blob--violet { background: hsl(258 90% 60% / 0.4); animation-duration: 26s; animation-direction: alternate-reverse; }

@keyframes drift {
  0% { transform: translate(0, 0) scale(1); }
  50% { transform: translate(40px, -30px) scale(1.08); }
  100% { transform: translate(-30px, 20px) scale(0.96); }
}

/* ---------- CTA band ---------- */
.cta-band {
  position: relative;
  padding: clamp(2.5rem, 2rem + 3vw, 4.5rem);
  border-radius: var(--r-xl);
  border: 1px solid var(--border-strong);
  background:
    radial-gradient(40rem 20rem at 10% 0%, hsl(199 95% 55% / 0.22), transparent 60%),
    radial-gradient(40rem 20rem at 100% 100%, hsl(258 90% 66% / 0.25), transparent 60%),
    var(--surface-solid);
  text-align: center;
  overflow: hidden;
  isolation: isolate;
}
.cta-band::after {
  content: "";
  position: absolute;
  inset: 0;
  z-index: -1;
  background-image:
    linear-gradient(hsl(215 40% 60% / 0.06) 1px, transparent 1px),
    linear-gradient(90deg, hsl(215 40% 60% / 0.06) 1px, transparent 1px);
  background-size: 40px 40px;
  mask-image: radial-gradient(ellipse at center, #000 20%, transparent 75%);
  -webkit-mask-image: radial-gradient(ellipse at center, #000 20%, transparent 75%);
}
.cta-band h2 { max-width: 22ch; margin-inline: auto; }
.cta-band p { max-width: 56ch; margin: 0 auto var(--space-6); color: var(--text-soft); font-size: var(--fs-md); }
.cta-band .btn-row { justify-content: center; }

/* ---------- Footer ---------- */
.site-footer {
  margin-top: var(--section-y);
  padding-block: var(--space-8) var(--space-6);
  border-top: 1px solid var(--border);
  background: linear-gradient(180deg, var(--bg-alt), var(--bg));
}
.footer-grid {
  display: grid;
  grid-template-columns: 1.6fr repeat(3, 1fr);
  gap: var(--space-7);
}
.footer-brand p { margin-top: var(--space-4); color: var(--muted); max-width: 32ch; font-size: var(--fs-sm); }
.footer-col h2 {
  font-size: var(--fs-xs);
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--text);
  margin-bottom: var(--space-4);
}
.footer-col ul { display: grid; gap: 0.55rem; }
.footer-col a { color: var(--muted); font-size: var(--fs-sm); }
.footer-col a:hover { color: var(--text); }
.footer-partner {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  margin-top: var(--space-5);
  padding: 0.45rem 0.8rem;
  border-radius: var(--r-pill);
  border: 1px solid var(--border-strong);
  font-size: var(--fs-xs);
  color: var(--text-soft);
}
.footer-partner svg { width: 16px; height: 16px; color: var(--primary); }
.footer-bottom {
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: var(--space-4);
  margin-top: var(--space-8);
  padding-top: var(--space-5);
  border-top: 1px solid var(--border);
  font-size: var(--fs-xs);
  color: var(--muted);
}
.footer-bottom p { margin: 0; max-width: 70ch; }

@media (max-width: 900px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}
@media (max-width: 480px) {
  .footer-grid { grid-template-columns: 1fr; }
}

/* ---------- Forms ---------- */
.form { display: grid; gap: var(--space-5); }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-5); }
@media (max-width: 640px) { .form-row { grid-template-columns: 1fr; } }

.field { display: grid; gap: 0.45rem; }
.field > label,
.fieldset legend {
  font-size: var(--fs-sm);
  font-weight: 600;
  color: var(--text);
}
.field .req { color: var(--primary); margin-left: 2px; }
.field .hint { font-size: var(--fs-xs); color: var(--muted); font-weight: 400; }

.input,
.select,
.textarea {
  width: 100%;
  padding: 0.85rem 1rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-sm);
  background: hsl(222 47% 5% / 0.6);
  color: var(--text);
  font-size: var(--fs-base);
  transition: border-color var(--dur-fast) var(--ease), box-shadow var(--dur-fast) var(--ease), background var(--dur-fast) var(--ease);
}
.input::placeholder,
.textarea::placeholder { color: hsl(215 20% 50%); }
.input:hover, .select:hover, .textarea:hover { border-color: hsl(215 50% 70% / 0.4); }
.input:focus, .select:focus, .textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px hsl(199 95% 55% / 0.18);
  background: hsl(222 47% 5% / 0.85);
}
.textarea { min-height: 140px; resize: vertical; }
.select {
  appearance: none;
  padding-right: 2.5rem;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.85rem center;
  background-size: 18px;
}
.select option { background: var(--surface-solid); color: var(--text); }

.field.is-invalid .input,
.field.is-invalid .select { border-color: var(--danger); box-shadow: 0 0 0 4px hsl(0 84% 66% / 0.14); }
.field__error { display: none; font-size: var(--fs-xs); color: var(--danger); }
.field.is-invalid .field__error { display: block; }

.fieldset { border: 0; padding: 0; margin: 0; min-width: 0; }
.fieldset legend { margin-bottom: 0.6rem; padding: 0; }

.chip-group { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.chip { position: relative; }
.chip input { position: absolute; opacity: 0; pointer-events: none; }
.chip label {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  padding: 0.5rem 0.9rem;
  border: 1px solid var(--border-strong);
  border-radius: var(--r-pill);
  font-size: var(--fs-sm);
  font-weight: 500;
  color: var(--text-soft);
  background: hsl(222 47% 5% / 0.4);
  cursor: pointer;
  user-select: none;
  transition: all var(--dur-fast) var(--ease);
}
.chip label:hover { border-color: var(--primary); color: var(--text); }
.chip input:checked + label {
  color: hsl(222 47% 7%);
  background: var(--grad-brand);
  border-color: transparent;
  box-shadow: 0 6px 18px -8px hsl(199 95% 55% / 0.7);
}
.chip input:focus-visible + label { outline: 2px solid var(--primary); outline-offset: 2px; }

.form-submit { display: flex; flex-wrap: wrap; align-items: center; gap: var(--space-4); }
.form-submit .muted { font-size: var(--fs-xs); }

.btn.is-loading { pointer-events: none; opacity: 0.85; }
.btn.is-loading::after {
  content: "";
  width: 16px; height: 16px;
  border-radius: 50%;
  border: 2px solid currentColor;
  border-right-color: transparent;
  animation: spin 0.7s linear infinite;
}
.btn.is-sent {
  pointer-events: none;
  background: var(--success);
  color: hsl(222 47% 7%);
  animation: none;
  box-shadow: 0 10px 30px -10px hsl(158 64% 52% / 0.7);
}
@keyframes spin { to { transform: rotate(360deg); } }

.form-success {
  display: none;
  text-align: center;
  padding: var(--space-7) var(--space-5);
  animation: pop-in 600ms var(--ease) both;
}
.form-success.is-visible { display: block; }
.form-success__icon {
  display: grid;
  place-items: center;
  width: 76px;
  height: 76px;
  margin: 0 auto var(--space-5);
  border-radius: 50%;
  background: var(--success-soft);
  border: 1px solid hsl(158 64% 52% / 0.4);
  color: var(--success);
  box-shadow: 0 0 0 10px hsl(158 64% 52% / 0.06);
}
.form-success__icon svg { width: 36px; height: 36px; }
.form-success__icon path { stroke-dasharray: 30; stroke-dashoffset: 30; animation: draw 600ms 250ms var(--ease) forwards; }
.form-success p { color: var(--muted); max-width: 44ch; margin-inline: auto; }
.form.is-hidden { display: none; }

@keyframes pop-in { from { opacity: 0; transform: scale(0.94) translateY(10px); } to { opacity: 1; transform: none; } }
@keyframes draw { to { stroke-dashoffset: 0; } }