/* ============================================
   css/layout.css — Layout, Nav, Grid system
   ============================================ */

/* ─── Container ─── */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

/* ─── Navigation ─── */
.nav-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  height: var(--nav-height);
  display: flex;
  align-items: center;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(15, 50, 130, 0.08);
  transition: box-shadow var(--transition-base), background var(--transition-base);
  box-shadow: 0 14px 40px rgba(15, 50, 130, 0.05);
}

.nav-header.scrolled {
  box-shadow: var(--shadow-md);
}

.nav-inner {
  display: flex;
  align-items: center;
  gap: var(--space-8);
  position: relative;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
  transition: opacity var(--transition-fast);
}

.nav-logo:hover {
  opacity: 0.85;
}

.logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1;
}

.logo-talks {
  font-family: var(--font-display);
  font-weight: var(--fw-extrabold);
  font-size: var(--text-xl);
  color: var(--blue-800);
  letter-spacing: -0.02em;
}

.logo-by {
  font-size: var(--text-xs);
  color: var(--gray-400);
  font-weight: var(--fw-medium);
  letter-spacing: 0.05em;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex: 1;
  justify-content: center;
}

.nav-link {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--fw-medium);
  color: var(--gray-600);
  border-radius: var(--radius-md);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-link:hover {
  color: var(--blue-700);
  background: var(--blue-50);
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-shrink: 0;
}

.mobile-actions {
  display: none;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
  margin-left: auto;
  min-width: 48px;
  min-height: 48px;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  touch-action: manipulation;
  z-index: 110;
}

.nav-toggle span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--gray-700);
  border-radius: var(--radius-full);
  transition: transform var(--transition-base), opacity var(--transition-fast);
}

.nav-toggle.active span:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* ─── Section Spacing ─── */
section {
  padding-block: var(--space-24);
}

.hero {
  padding-block: 0;
}

/* ─── Section Header ─── */
.section-header {
  text-align: center;
  max-width: 680px;
  margin-inline: auto;
  margin-bottom: var(--space-16);
}

.section-label {
  display: inline-block;
  font-size: var(--text-xs);
  font-weight: var(--fw-semibold);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--orange-500);
  margin-bottom: var(--space-3);
}

.section-header h2 {
  font-size: clamp(var(--text-3xl), 4vw, var(--text-5xl));
  color: var(--blue-900);
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.section-header p {
  font-size: var(--text-lg);
  color: var(--gray-500);
  line-height: var(--lh-relaxed);
}

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

/* ─── Pricing Grid ─── */
.pricing-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
  align-items: start;
}

/* ─── Steps ─── */
.steps-grid {
  display: grid;
  grid-template-columns: 1fr auto 1fr auto 1fr auto 1fr;
  gap: var(--space-4);
  align-items: start;
}

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

/* ─── FAQ ─── */
.faq-grid {
  max-width: 800px;
  margin-inline: auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

/* ─── Module Row ─── */
.module-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  margin-bottom: var(--space-24);
}

.module-row--reverse {
  direction: rtl;
}

.module-row--reverse>* {
  direction: ltr;
}

/* ─── Footer ─── */
.footer-inner {
  display: grid;
  grid-template-columns: 1fr 2fr;
  gap: var(--space-16);
  padding-block: var(--space-16);
}

.footer-links {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.footer-bottom-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
}