/* =============================================================
   SIGMA SKILLS — Site Layout
   Page-level styles built on top of sigma-skills-brand.css
   ============================================================= */

/* ── SCROLL OFFSET FOR FIXED NAV ───────────────────────────── */
html {
  scroll-padding-top: 72px;
}

/* ── SITE HEADER ────────────────────────────────────────────── */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  transition:
    background-color var(--transition-base),
    box-shadow var(--transition-base),
    backdrop-filter var(--transition-base);
}

.site-header--scrolled {
  background-color: rgba(255, 255, 255, 0.96);
  backdrop-filter: blur(10px);
  box-shadow: var(--shadow-sm);
}

/* ── NAV ────────────────────────────────────────────────────── */
.site-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-block: var(--space-4);
}

/* Transparent state — logo/links on dark hero */
.site-header:not(.site-header--scrolled) .nav__logo {
  color: #fff;
}
.site-header:not(.site-header--scrolled) .nav__logo span {
  color: var(--color-secondary-400);
}
.site-header:not(.site-header--scrolled) .nav__link {
  color: rgba(255, 255, 255, 0.75);
}
.site-header:not(.site-header--scrolled) .nav__link:hover {
  color: #fff;
}
.site-header:not(.site-header--scrolled) .btn-primary {
  background-color: #fff;
  color: var(--color-primary-700);
}
.site-header:not(.site-header--scrolled) .btn-primary:hover {
  background-color: var(--color-primary-50);
}

/* Mobile toggle */
.nav__mobile-toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-2);
  color: inherit;
  line-height: 1;
}
.nav__mobile-toggle svg { width: 24px; height: 24px; }

.site-header:not(.site-header--scrolled) .nav__mobile-toggle {
  color: #fff;
}

/* Mobile menu */
.mobile-menu {
  background: #fff;
  border-top: 1px solid var(--color-border);
  padding: var(--space-4) var(--space-6) var(--space-6);
}
.mobile-menu ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

/* ── MAIN — offset for fixed nav ────────────────────────────── */
main {
  padding-top: 68px;
}

/* ── HERO ────────────────────────────────────────────────────── */
.hero {
  min-height: calc(100vh - 68px);
  display: flex;
  align-items: center;
  padding-block: var(--space-24);
}

.hero__decoration {
  position: absolute;
  top: -100px;
  right: -120px;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(224, 138, 0, 0.12) 0%, transparent 65%);
  pointer-events: none;
}

.hero__content {
  position: relative;
  z-index: 1;
  display: flex;
  flex-direction: column;
  align-items: flex-start;
  gap: var(--space-6);
  max-width: 860px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
}
.hero__badge svg { width: 14px; height: 14px; }

.hero__heading {
  color: #fff;
  margin-bottom: 0;
}

.hero__heading-accent {
  background: linear-gradient(135deg, var(--color-primary-300) 0%, var(--color-secondary-400) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__sub {
  color: rgba(255, 255, 255, 0.8);
  max-width: 640px;
  margin-bottom: 0;
}

.hero__actions {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.hero__ghost-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-ui);
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  color: rgba(255, 255, 255, 0.75);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.hero__ghost-link:hover { color: #fff; }
.hero__ghost-link svg { width: 16px; height: 16px; }

.hero__trust {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.5);
  margin-bottom: 0;
}
.hero__trust svg { width: 14px; height: 14px; flex-shrink: 0; }

/* ── SECTION HEADER ─────────────────────────────────────────── */
.section-header {
  max-width: 680px;
  margin-inline: auto;
  margin-bottom: var(--space-16);
}
.section-header h2 {
  margin-block: var(--space-3) var(--space-4);
}
.section-header .text-lead {
  margin-bottom: 0;
}

/* ── PROBLEM SECTION ────────────────────────────────────────── */
.problem-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.problem-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  padding: var(--space-8);
}

.problem-card__icon {
  width: 48px;
  height: 48px;
  border-radius: var(--radius-md);
  background: var(--color-primary-100);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary-700);
  flex-shrink: 0;
}
.problem-card__icon svg { width: 24px; height: 24px; }

.problem-card__title {
  font-size: var(--text-xl);
  margin-bottom: 0;
}
.problem-card p { margin-bottom: 0; }

/* ── SOLUTION SECTION ───────────────────────────────────────── */
.solution-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.solution-card {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  padding: var(--space-8);
}
.solution-card h3 { margin-bottom: 0; }
.solution-card p  { margin-bottom: 0; color: var(--color-text-secondary); }

.solution-card__icon {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.solution-card__icon svg { width: 28px; height: 28px; }

.solution-card__icon--teal  { background: var(--color-primary-100);   color: var(--color-primary-700); }
.solution-card__icon--amber { background: var(--color-secondary-100); color: var(--color-secondary-700); }
.solution-card__icon--coral { background: var(--color-accent-100);    color: var(--color-accent-600); }

/* ── HOW IT WORKS ───────────────────────────────────────────── */
.steps-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0;
  position: relative;
}

/* Horizontal connector line behind the step numbers */
.steps-grid::before {
  content: '';
  position: absolute;
  /* vertically centred on step numbers (step pad-top 32px + number radius 28px) */
  top: calc(var(--space-8) + 28px);
  left: calc(16.67% + 0px);
  right: calc(16.67% + 0px);
  height: 2px;
  background: linear-gradient(
    90deg,
    var(--color-secondary-300) 0%,
    var(--color-secondary-200) 50%,
    var(--color-secondary-300) 100%
  );
}

.step {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  padding: var(--space-8) var(--space-6);
  position: relative;
}

.step__number {
  width: 56px;
  height: 56px;
  border-radius: var(--radius-full);
  background: var(--color-primary-600);
  color: #fff;
  font-family: var(--font-heading);
  font-size: var(--text-2xl);
  font-weight: var(--weight-extrabold);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  position: relative;
  z-index: 1;
  box-shadow: var(--shadow-md);
  margin-bottom: var(--space-6);
}

.step__body { display: flex; flex-direction: column; gap: var(--space-3); }
.step__title { font-size: var(--text-2xl); margin-bottom: 0; }
.step__body p { margin-bottom: 0; color: var(--color-text-secondary); }

.steps-cta { margin-top: var(--space-12); }

/* ── REGISTER SECTION ───────────────────────────────────────── */
.register-header h2 { color: #fff; }
.register-overline  { color: var(--color-secondary-400); }
.register-sub       { color: var(--color-neutral-300); }

.register-form {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid rgba(255, 255, 255, 0.1);
  border-radius: var(--radius-2xl);
  padding: var(--space-10);
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  margin-top: var(--space-8);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
}

/* Inputs on dark background */
.section-dark .form-label    { color: rgba(255, 255, 255, 0.85); }
.section-dark .form-input {
  background: rgba(255, 255, 255, 0.07);
  border-color: rgba(255, 255, 255, 0.18);
  color: #fff;
}
.section-dark .form-input::placeholder { color: rgba(255, 255, 255, 0.3); }
.section-dark .form-input:focus {
  border-color: var(--color-primary-400);
  background: rgba(255, 255, 255, 0.1);
  box-shadow: 0 0 0 3px rgba(34, 135, 128, 0.25);
}

.field-required { color: var(--color-accent-400); margin-left: 2px; }
.field-optional {
  color: var(--color-neutral-400);
  font-weight: var(--weight-regular);
  font-size: var(--text-xs);
}

/* Validation errors */
.field-error {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: var(--color-accent-400);
}

/* GDPR checkbox row */
.gdpr-group { gap: var(--space-2); }

.gdpr-label {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  cursor: pointer;
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  color: rgba(255, 255, 255, 0.7);
  line-height: 1.5;
}

.gdpr-checkbox {
  width: 18px;
  height: 18px;
  border-radius: var(--radius-sm);
  accent-color: var(--color-primary-500);
  flex-shrink: 0;
  margin-top: 2px;
  cursor: pointer;
}

.gdpr-link { color: var(--color-primary-300); }
.gdpr-link:hover { color: var(--color-primary-200); }

/* Submit button */
.form-submit {
  width: 100%;
  justify-content: center;
}
.form-submit svg { width: 18px; height: 18px; }

@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
.submit-spinner { animation: spin 0.8s linear infinite; }

/* Privacy note */
.form-privacy-note {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  color: rgba(255, 255, 255, 0.35);
  text-align: center;
  margin-bottom: 0;
}
.form-privacy-note svg { width: 12px; height: 12px; flex-shrink: 0; }

/* Success state */
.form-success {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-4);
  text-align: center;
  padding: var(--space-16) var(--space-8);
}
.form-success__icon {
  width: 72px;
  height: 72px;
  border-radius: var(--radius-full);
  background: rgba(34, 135, 128, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary-300);
}
.form-success__icon svg { width: 36px; height: 36px; }
.form-success h3 { color: #fff; font-size: var(--text-3xl); }
.form-success p  { color: rgba(255, 255, 255, 0.6); max-width: 480px; margin-bottom: 0; }

/* ── FOOTER ─────────────────────────────────────────────────── */
.site-footer {
  background: var(--color-neutral-900);
  color: rgba(255, 255, 255, 0.6);
  padding-block: var(--space-16);
}
.site-footer a {
  color: rgba(255, 255, 255, 0.6);
  text-decoration: none;
  transition: color var(--transition-fast);
}
.site-footer a:hover { color: #fff; }

.footer__top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: var(--space-12);
  margin-bottom: var(--space-12);
}

.footer__logo { display: block; margin-bottom: var(--space-3); }
.footer__tagline {
  font-size: var(--text-sm);
  max-width: 300px;
  margin-bottom: 0;
}

.footer__nav ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.footer__nav a {
  font-family: var(--font-ui);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
}

.footer__social {
  display: flex;
  gap: var(--space-3);
  align-items: flex-start;
}

.social-link {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  border: 1px solid rgba(255, 255, 255, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  transition:
    border-color var(--transition-fast),
    background-color var(--transition-fast),
    color var(--transition-fast);
}
.social-link:hover {
  border-color: rgba(255, 255, 255, 0.4);
  background: rgba(255, 255, 255, 0.08);
  color: #fff !important;
}
.social-link svg { width: 18px; height: 18px; }

.footer__bottom {
  padding-top: var(--space-8);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}
.footer__bottom p {
  font-family: var(--font-ui);
  font-size: var(--text-xs);
  margin-bottom: 0;
}

/* ── SCROLL ANIMATIONS ──────────────────────────────────────── */

/* Stagger siblings inside grids */
.problem-grid  .animate-on-scroll:nth-child(2),
.solution-grid .animate-on-scroll:nth-child(2),
.steps-grid    .animate-on-scroll:nth-child(2) { transition-delay: 100ms; }

.problem-grid  .animate-on-scroll:nth-child(3),
.solution-grid .animate-on-scroll:nth-child(3),
.steps-grid    .animate-on-scroll:nth-child(3) { transition-delay: 200ms; }

/* Hero fade-in (staggered, no scroll trigger) */
.animate-fade {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}
.animate-fade.is-visible {
  opacity: 1;
  transform: translateY(0);
}
.hero__badge.animate-fade    { transition-delay: 0ms; }
.hero__heading.animate-fade  { transition-delay: 80ms; }
.hero__sub.animate-fade      { transition-delay: 160ms; }
.hero__actions.animate-fade  { transition-delay: 240ms; }
.hero__trust.animate-fade    { transition-delay: 320ms; }

/* Scroll-triggered fade-in */
.animate-on-scroll {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.55s ease, transform 0.55s ease;
}
.animate-on-scroll.is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* ── RESPONSIVE ─────────────────────────────────────────────── */

@media (max-width: 1024px) {
  .footer__top { grid-template-columns: 1fr 1fr; }
  .footer__social { grid-column: span 2; }
}

@media (max-width: 768px) {
  /* Nav */
  .nav__links,
  .nav__cta         { display: none; }
  .nav__mobile-toggle { display: flex; }

  /* Hero */
  .hero__actions { flex-direction: column; align-items: flex-start; }
  .hero__ghost-link { align-self: flex-start; }

  /* Grids: single column */
  .problem-grid,
  .solution-grid { grid-template-columns: 1fr; }

  /* Steps: vertical layout */
  .steps-grid {
    grid-template-columns: 1fr;
  }
  .steps-grid::before { display: none; }

  .step {
    flex-direction: row;
    align-items: flex-start;
    text-align: left;
    gap: var(--space-5);
    padding: var(--space-5) var(--space-2);
    position: relative;
  }
  .step:not(:last-child)::after {
    content: '';
    position: absolute;
    top: calc(var(--space-5) + 56px);
    left: calc(var(--space-2) + 27px);
    width: 2px;
    height: calc(100% - 56px);
    background: var(--color-secondary-300);
  }
  .step__number { margin-bottom: 0; flex-shrink: 0; }
  .step__body { text-align: left; }

  /* Form */
  .form-row { grid-template-columns: 1fr; }
  .register-form { padding: var(--space-6); }

  /* Footer */
  .footer__top { grid-template-columns: 1fr; gap: var(--space-8); }
  .footer__social { grid-column: auto; }

  /* Stagger delays: remove on mobile to avoid confusion */
  .problem-grid  .animate-on-scroll:nth-child(2),
  .solution-grid .animate-on-scroll:nth-child(2),
  .steps-grid    .animate-on-scroll:nth-child(2),
  .problem-grid  .animate-on-scroll:nth-child(3),
  .solution-grid .animate-on-scroll:nth-child(3),
  .steps-grid    .animate-on-scroll:nth-child(3) { transition-delay: 0ms; }
}

@media (max-width: 480px) {
  .hero { padding-block: var(--space-16); }
  .register-form { padding: var(--space-5); }
}