/* ===========================
   Skillora Lab — Main Styles
   =========================== */

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

:root {
  --ink: #0F1823;
  --ink-mid: #3A4557;
  --ink-soft: #637590;
  --surface: #FFFFFF;
  --surface-alt: #F4F7FB;
  --border: #DDE4EF;
  --primary: #1D4ED8;
  --primary-hover: #1741B5;
  --primary-light: #EEF3FF;
  --accent: #F59E0B;
  --accent-light: #FEF3C7;
  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;
  --shadow-sm: 0 1px 3px rgba(0,0,0,.07), 0 1px 2px rgba(0,0,0,.05);
  --shadow: 0 4px 12px rgba(0,0,0,.08), 0 1px 4px rgba(0,0,0,.05);
  --shadow-lg: 0 12px 32px rgba(0,0,0,.10), 0 4px 12px rgba(0,0,0,.06);
  --transition: 0.2s ease;
  --font-body: 'Inter', system-ui, sans-serif;
  --font-head: 'Manrope', 'Inter', system-ui, sans-serif;
}

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  color: var(--ink);
  background: var(--surface);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

img { display: block; max-width: 100%; height: auto; }
a { color: inherit; text-decoration: none; }
button { cursor: pointer; font-family: inherit; border: none; background: none; }

.container {
  max-width: 1160px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Typography ---------- */
.section-title {
  font-family: var(--font-head);
  font-size: clamp(1.75rem, 3.5vw, 2.4rem);
  font-weight: 800;
  line-height: 1.2;
  color: var(--ink);
  margin-bottom: 16px;
}

.section-sub {
  font-size: 1.0625rem;
  color: var(--ink-soft);
  max-width: 580px;
  line-height: 1.7;
  margin-bottom: 40px;
}

.section-head {
  text-align: center;
  margin-bottom: 56px;
}

.section-head .section-sub {
  margin-left: auto;
  margin-right: auto;
}

/* ---------- Pills ---------- */
.pill {
  display: inline-flex;
  align-items: center;
  font-size: 0.8125rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: 6px 14px;
  border-radius: 999px;
  background: var(--primary-light);
  color: var(--primary);
  margin-bottom: 18px;
}
.pill-dark {
  background: var(--ink);
  color: #fff;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-body);
  font-weight: 600;
  font-size: 0.9375rem;
  border-radius: var(--radius-sm);
  padding: 11px 24px;
  transition: background var(--transition), color var(--transition), border-color var(--transition), box-shadow var(--transition), transform var(--transition);
  cursor: pointer;
  border: 2px solid transparent;
  white-space: nowrap;
  text-decoration: none;
}

.btn-primary {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
}
.btn-primary:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
  transform: translateY(-1px);
  box-shadow: 0 4px 16px rgba(29,78,216,.25);
}

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

.btn-outline-dark {
  background: transparent;
  color: var(--ink);
  border-color: var(--border);
}
.btn-outline-dark:hover {
  border-color: var(--ink-mid);
  background: var(--surface-alt);
}

.btn-nav {
  background: var(--primary);
  color: #fff;
  border-color: var(--primary);
  padding: 8px 20px;
  font-size: 0.875rem;
}
.btn-nav:hover {
  background: var(--primary-hover);
  border-color: var(--primary-hover);
}

.btn-ghost {
  background: transparent;
  color: var(--ink-mid);
  border-color: transparent;
}
.btn-ghost:hover {
  background: var(--surface-alt);
}

.btn-ghost-light {
  background: transparent;
  color: rgba(255,255,255,.75);
  border-color: rgba(255,255,255,.25);
}
.btn-ghost-light:hover {
  background: rgba(255,255,255,.1);
  color: #fff;
}

.btn-lg {
  padding: 14px 32px;
  font-size: 1rem;
  border-radius: var(--radius);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.875rem;
}

.btn-block { width: 100%; }

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border);
  transition: box-shadow var(--transition);
}
.site-header.scrolled {
  box-shadow: var(--shadow-sm);
}

.site-header .container {
  display: flex;
  align-items: center;
  gap: 32px;
  height: 64px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
  text-decoration: none;
}
.logo-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 10px;
  background: var(--primary);
  color: #fff;
  font-family: var(--font-head);
  font-weight: 800;
  font-size: 1.125rem;
}
.logo-text {
  font-family: var(--font-head);
  font-weight: 700;
  font-size: 1.125rem;
  color: var(--ink);
}
.logo-text em {
  font-style: normal;
  color: var(--primary);
}
.logo-light .logo-text { color: #fff; }
.logo-light .logo-text em { color: var(--accent); }

.main-nav {
  display: flex;
  align-items: center;
  gap: 4px;
  margin-left: auto;
}

.nav-link {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--ink-mid);
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  transition: color var(--transition), background var(--transition);
}
.nav-link:hover {
  color: var(--ink);
  background: var(--surface-alt);
}

.burger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  margin-left: auto;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.burger:hover { background: var(--surface-alt); }
.burger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--ink);
  border-radius: 2px;
  transition: transform var(--transition), opacity var(--transition);
}
.burger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.burger.open span:nth-child(2) { opacity: 0; }
.burger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* ---------- Hero ---------- */
.hero {
  padding: 80px 0 72px;
  background: linear-gradient(135deg, #F0F4FF 0%, #FFFFFF 60%);
  overflow: hidden;
}

.hero-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 56px;
  align-items: center;
}

.hero-content { max-width: 560px; }

.hero-title {
  font-family: var(--font-head);
  font-size: clamp(2rem, 4.5vw, 3.2rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--ink);
  margin-bottom: 20px;
}

.accent-text {
  color: var(--primary);
  position: relative;
}

.hero-desc {
  font-size: 1.0625rem;
  color: var(--ink-mid);
  line-height: 1.75;
  margin-bottom: 32px;
  max-width: 480px;
}

.hero-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 32px;
}

.hero-trust-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.hero-trust-item {
  font-size: 0.875rem;
  color: var(--ink-soft);
  display: flex;
  align-items: center;
  gap: 8px;
}

.check {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  background: var(--primary-light);
  color: var(--primary);
  border-radius: 50%;
  font-size: 0.625rem;
  font-weight: 700;
  flex-shrink: 0;
}

.hero-visual { position: relative; }

.hero-img-frame {
  border-radius: var(--radius-lg);
  overflow: hidden;
  box-shadow: var(--shadow-lg);
  position: relative;
}
.hero-img-frame::before {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  border: 1px solid rgba(255,255,255,.6);
  z-index: 1;
}
.hero-img-frame img {
  width: 100%;
  aspect-ratio: 16/10;
  object-fit: cover;
}

/* ---------- Sections ---------- */
.section { padding: 96px 0; }
.section-alt { background: var(--surface-alt); }

/* ---------- Skills Grid ---------- */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.skill-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px 28px;
  transition: box-shadow var(--transition), transform var(--transition), border-color var(--transition);
}
.skill-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-2px);
  border-color: #B8C8F0;
}

.skill-icon-wrap {
  font-size: 2rem;
  margin-bottom: 16px;
  line-height: 1;
}

.skill-card h3 {
  font-family: var(--font-head);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 10px;
}

.skill-card p {
  font-size: 0.9375rem;
  color: var(--ink-soft);
  line-height: 1.65;
}

.skill-card-open {
  border-color: var(--primary);
  border-style: dashed;
  background: var(--primary-light);
  display: flex;
  flex-direction: column;
}
.skill-card-open .btn { margin-top: auto; padding-top: 16px; align-self: flex-start; }

/* ---------- Format ---------- */
.format-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.format-left { max-width: 520px; }
.format-left .section-sub { margin-bottom: 40px; }

.steps { display: flex; flex-direction: column; gap: 32px; margin-bottom: 40px; }

.step {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.step-num {
  font-family: var(--font-head);
  font-size: 1.75rem;
  font-weight: 800;
  color: var(--primary);
  opacity: 0.25;
  line-height: 1;
  flex-shrink: 0;
  width: 48px;
  padding-top: 2px;
}

.step-body h3 {
  font-family: var(--font-head);
  font-size: 1.0625rem;
  font-weight: 700;
  color: var(--ink);
  margin-bottom: 6px;
}
.step-body p {
  font-size: 0.9375rem;
  color: var(--ink-soft);
  line-height: 1.65;
}

.format-right img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
}

/* ---------- Audience ---------- */
.audience-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.audience-image img {
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  width: 100%;
}

.audience-content .section-sub { margin-bottom: 32px; }

.audience-list { display: flex; flex-direction: column; gap: 20px; margin-bottom: 36px; }

.audience-item {
  display: flex;
  gap: 14px;
  font-size: 0.9375rem;
  color: var(--ink-mid);
  line-height: 1.6;
}

.audience-check {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 24px;
  height: 24px;
  border-radius: 50%;
  background: var(--primary-light);
  color: var(--primary);
  font-size: 0.75rem;
  font-weight: 700;
  flex-shrink: 0;
  margin-top: 1px;
}

.audience-item strong { color: var(--ink); font-weight: 600; }

/* ---------- Lead Form ---------- */
.lead-section {
  background: linear-gradient(135deg, #1D4ED8 0%, #1E40AF 100%);
}
.lead-section .section-title,
.lead-section .pill { color: #fff; }
.lead-section .section-sub { color: rgba(255,255,255,.8); }

.lead-container {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 72px;
  align-items: start;
}

.lead-text { padding-top: 16px; }
.lead-text .pill { background: rgba(255,255,255,.15); color: #fff; }

.lead-trust { display: flex; flex-direction: column; gap: 12px; margin-top: 36px; }
.lead-trust-item {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.9375rem;
  color: rgba(255,255,255,.85);
}
.lead-icon { font-size: 1.125rem; }

.form-card {
  background: #fff;
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: var(--shadow-lg);
}

/* ---------- Form Elements ---------- */
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 20px; }

.field-label {
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--ink-mid);
}
.req { color: var(--primary); }

.field-input {
  width: 100%;
  padding: 11px 14px;
  border: 1.5px solid var(--border);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 0.9375rem;
  color: var(--ink);
  background: var(--surface);
  transition: border-color var(--transition), box-shadow var(--transition);
  appearance: none;
  -webkit-appearance: none;
}
.field-input:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 3px rgba(29,78,216,.12);
}
.field-input.error { border-color: #EF4444; }
.field-input::placeholder { color: #A0ABBB; }

.field-select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3E%3Cpath fill='%23637590' d='M4.5 6L8 9.5 11.5 6z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 12px center;
  background-size: 16px;
  padding-right: 36px;
  cursor: pointer;
}

.field-textarea { resize: vertical; min-height: 80px; }

.field-err {
  font-size: 0.8125rem;
  color: #EF4444;
  min-height: 16px;
}

.field-consent { margin-bottom: 24px; }

.consent-row {
  display: flex;
  gap: 10px;
  cursor: pointer;
  font-size: 0.875rem;
  color: var(--ink-soft);
  line-height: 1.5;
  position: relative;
}
.consent-row input[type="checkbox"] {
  position: absolute;
  opacity: 0;
  width: 0;
  height: 0;
}
.consent-box {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 18px;
  height: 18px;
  border: 2px solid var(--border);
  border-radius: 4px;
  flex-shrink: 0;
  margin-top: 2px;
  transition: background var(--transition), border-color var(--transition);
  background: var(--surface);
}
.consent-row input:checked ~ .consent-box {
  background: var(--primary);
  border-color: var(--primary);
}
.consent-row input:checked ~ .consent-box::after {
  content: '';
  display: block;
  width: 4px;
  height: 8px;
  border: 2px solid #fff;
  border-top: none;
  border-left: none;
  transform: rotate(45deg) translate(-1px, -1px);
}
.consent-text a {
  color: var(--primary);
  text-decoration: underline;
  text-underline-offset: 2px;
}

/* ---------- FAQ ---------- */
.faq-list {
  max-width: 760px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 0;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.faq-item { border-bottom: 1px solid var(--border); }
.faq-item:last-child { border-bottom: none; }

.faq-q {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 20px 24px;
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 600;
  color: var(--ink);
  background: var(--surface);
  text-align: left;
  transition: background var(--transition);
  cursor: pointer;
}
.faq-q:hover { background: var(--surface-alt); }
.faq-q[aria-expanded="true"] { background: var(--primary-light); color: var(--primary); }

.faq-plus {
  font-size: 1.5rem;
  font-weight: 300;
  color: var(--ink-soft);
  flex-shrink: 0;
  transition: transform var(--transition);
  line-height: 1;
}
.faq-q[aria-expanded="true"] .faq-plus {
  transform: rotate(45deg);
  color: var(--primary);
}

.faq-a {
  padding: 0 24px 20px;
  background: var(--surface);
}
.faq-a p {
  font-size: 0.9375rem;
  color: var(--ink-soft);
  line-height: 1.7;
}

/* ---------- Footer ---------- */
.site-footer {
  background: var(--ink);
  color: rgba(255,255,255,.7);
  padding: 64px 0 32px;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}

.footer-brand { grid-column: 1; }

.footer-tagline {
  font-size: 0.9rem;
  color: rgba(255,255,255,.5);
  margin-top: 12px;
  line-height: 1.6;
  max-width: 220px;
}

.footer-heading {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: rgba(255,255,255,.4);
  margin-bottom: 16px;
}

.footer-link {
  display: block;
  font-size: 0.875rem;
  color: rgba(255,255,255,.6);
  margin-bottom: 8px;
  transition: color var(--transition);
}
.footer-link:hover { color: #fff; }

.footer-info {
  font-size: 0.8125rem;
  color: rgba(255,255,255,.5);
  margin-bottom: 4px;
  line-height: 1.5;
}

.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 24px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 16px;
  font-size: 0.8125rem;
  color: rgba(255,255,255,.35);
  flex-wrap: wrap;
}

/* ---------- Cookie Banner ---------- */
.cookie-banner {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  z-index: 200;
  width: calc(100% - 48px);
  max-width: 700px;
  background: var(--ink);
  color: rgba(255,255,255,.85);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 20px 24px;
  display: none;
  animation: slideUp .3s ease forwards;
}
.cookie-banner.visible { display: block; }

@keyframes slideUp {
  from { transform: translateX(-50%) translateY(20px); opacity: 0; }
  to { transform: translateX(-50%) translateY(0); opacity: 1; }
}

.cookie-inner {
  display: flex;
  align-items: center;
  gap: 20px;
  flex-wrap: wrap;
}
.cookie-inner p {
  font-size: 0.875rem;
  flex: 1;
  min-width: 240px;
  line-height: 1.5;
}
.cookie-inner a { color: #7AABFF; text-decoration: underline; }

.cookie-btns { display: flex; gap: 10px; flex-shrink: 0; }

/* ---------- Legal Pages ---------- */
.legal-page { padding: 80px 0 96px; }
.legal-page .container { max-width: 760px; }
.legal-title {
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 8px;
}
.legal-date {
  font-size: 0.875rem;
  color: var(--ink-soft);
  margin-bottom: 40px;
}
.legal-body h2 {
  font-family: var(--font-head);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--ink);
  margin: 36px 0 12px;
}
.legal-body h2:first-child { margin-top: 0; }
.legal-body p {
  font-size: 0.9375rem;
  color: var(--ink-mid);
  line-height: 1.75;
  margin-bottom: 12px;
}
.legal-body ul {
  padding-left: 20px;
  margin-bottom: 12px;
}
.legal-body ul li {
  font-size: 0.9375rem;
  color: var(--ink-mid);
  line-height: 1.75;
  margin-bottom: 6px;
}
.legal-back {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 32px;
  transition: gap var(--transition);
}
.legal-back:hover { gap: 10px; }

/* ---------- Success Page ---------- */
.success-page {
  min-height: 80vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 80px 24px;
}
.success-box {
  text-align: center;
  max-width: 520px;
}
.success-icon {
  font-size: 4rem;
  margin-bottom: 24px;
  line-height: 1;
}
.success-title {
  font-family: var(--font-head);
  font-size: 2rem;
  font-weight: 800;
  color: var(--ink);
  margin-bottom: 16px;
}
.success-desc {
  font-size: 1.0625rem;
  color: var(--ink-soft);
  line-height: 1.75;
  margin-bottom: 36px;
}

/* ---------- Mobile Nav Overlay ---------- */
@media (max-width: 768px) {
  .main-nav {
    position: fixed;
    inset: 64px 0 0 0;
    background: var(--surface);
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    padding: 16px;
    transform: translateX(100%);
    transition: transform .3s ease;
    z-index: 99;
    border-top: 1px solid var(--border);
    overflow-y: auto;
  }
  .main-nav.open {
    transform: translateX(0);
  }
  .nav-link {
    padding: 14px 16px;
    font-size: 1rem;
    border-radius: var(--radius-sm);
  }
  .btn-nav {
    margin: 8px 0 0;
    padding: 14px;
    text-align: center;
    border-radius: var(--radius-sm);
  }
  .burger { display: flex; }
}

/* ---------- Responsive ---------- */
@media (max-width: 900px) {
  .hero-inner {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-content { max-width: 100%; }
  .hero-visual { order: -1; }
  .hero-img-frame img { aspect-ratio: 16/9; }

  .skills-grid { grid-template-columns: repeat(2, 1fr); }

  .format-container,
  .audience-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .format-right, .audience-image { order: -1; }
  .format-left { max-width: 100%; }

  .lead-container {
    grid-template-columns: 1fr;
    gap: 40px;
  }

  .footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 600px) {
  .skills-grid { grid-template-columns: 1fr; }
  .hero { padding: 56px 0 48px; }
  .section { padding: 64px 0; }
  .hero-title { font-size: 2rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; justify-content: center; }
  .form-card { padding: 28px 20px; }
  .footer-grid { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
  .cookie-banner { bottom: 16px; width: calc(100% - 32px); }
  .cookie-inner { flex-direction: column; align-items: flex-start; }
}