/* ============================================================
   SE Group Inc. — Modern Design System
   ============================================================ */

/* ── Custom Properties ────────────────────────────────────── */
:root {
  --clr-primary:      #0a2342;
  --clr-secondary:    #1565c0;
  --clr-accent:       #00b4d8;
  --clr-accent-hover: #00c8f0;
  --clr-bg:           #ffffff;
  --clr-bg-alt:       #f8fafc;
  --clr-bg-dark:      #060e1a;
  --clr-text:         #1a2535;
  --clr-muted:        #64748b;
  --clr-border:       #e2e8f0;

  --font: 'Inter', system-ui, -apple-system, sans-serif;
  --radius:    12px;
  --radius-sm:  8px;
  --shadow:    0 4px 24px rgba(10, 35, 66, 0.08);
  --shadow-lg: 0 12px 48px rgba(10, 35, 66, 0.14);
  --transition: 0.25s ease;
  --max-w: 1160px;
}

/* ── Reset ────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font);
  line-height: 1.6;
  color: var(--clr-text);
  background: var(--clr-bg);
  -webkit-font-smoothing: antialiased;
}
img { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }

/* ── Container ────────────────────────────────────────────── */
.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.75em 2em;
  border-radius: 50px;
  font-family: var(--font);
  font-size: 0.95rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  border: 2px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
  cursor: pointer;
}

.btn-primary {
  background: var(--clr-primary);
  color: #fff;
  border-color: var(--clr-primary);
}
.btn-primary:hover {
  background: var(--clr-secondary);
  border-color: var(--clr-secondary);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(10, 35, 66, 0.25);
}

.btn-accent {
  background: var(--clr-accent);
  color: var(--clr-primary);
  border-color: var(--clr-accent);
}
.btn-accent:hover {
  background: var(--clr-accent-hover);
  border-color: var(--clr-accent-hover);
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(0, 180, 216, 0.35);
}

.btn-outline {
  background: transparent;
  color: #fff;
  border-color: rgba(255, 255, 255, 0.5);
}
.btn-outline:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: #fff;
}

.btn-full { width: 100%; }

/* ── Section Shared ───────────────────────────────────────── */
.section { padding: 6rem 0; }

.section-label {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--clr-accent);
  margin-bottom: 0.75rem;
}

.section-header {
  text-align: center;
  max-width: 620px;
  margin: 0 auto 4rem;
}

.section-header h2 {
  font-size: clamp(1.75rem, 4vw, 2.5rem);
  font-weight: 800;
  color: var(--clr-primary);
  line-height: 1.15;
  letter-spacing: -0.025em;
  margin-bottom: 1rem;
}

.section-header p {
  color: var(--clr-muted);
  font-size: 1.05rem;
  line-height: 1.7;
}

/* ── Fade-in animation ────────────────────────────────────── */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.fade-in.visible { opacity: 1; transform: none; }

/* ============================================================
   Navigation
   ============================================================ */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  padding: 1.25rem 0;
  transition: background var(--transition), padding var(--transition), box-shadow var(--transition);
}

#navbar.scrolled {
  background: rgba(6, 14, 26, 0.96);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  padding: 0.7rem 0;
  box-shadow: 0 1px 0 rgba(255, 255, 255, 0.04);
}

.nav-container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 2rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: 0.65rem;
  font-size: 1.05rem;
  font-weight: 700;
  color: #fff;
  flex-shrink: 0;
}
.nav-logo img {
  width: 34px;
  height: 34px;
  border-radius: 8px;
  object-fit: cover;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 0.2rem;
}
.nav-links a {
  padding: 0.45rem 0.9rem;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.88rem;
  font-weight: 500;
  border-radius: 8px;
  transition: all var(--transition);
}
.nav-links a:hover,
.nav-links a.active {
  color: #fff;
  background: rgba(255, 255, 255, 0.08);
}

.nav-cta {
  background: var(--clr-accent) !important;
  color: var(--clr-primary) !important;
  font-weight: 700 !important;
  margin-left: 0.5rem;
  border-radius: 50px !important;
}
.nav-cta:hover {
  background: var(--clr-accent-hover) !important;
  transform: translateY(-1px);
  box-shadow: 0 4px 14px rgba(0, 180, 216, 0.3);
}

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: #fff;
  font-size: 1.2rem;
  padding: 0.4rem 0.5rem;
  z-index: 1001;
}

/* ============================================================
   Hero
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  background: linear-gradient(140deg, #060e1a 0%, #0d2244 50%, #0f3460 100%);
  position: relative;
  overflow: hidden;
  padding: 8rem 0 5rem;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 780px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.4rem;
  background: rgba(0, 180, 216, 0.12);
  border: 1px solid rgba(0, 180, 216, 0.28);
  color: var(--clr-accent);
  padding: 0.4em 1.1em;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 1.75rem;
}

.hero h1 {
  font-size: clamp(2.4rem, 6vw, 3.8rem);
  font-weight: 800;
  line-height: 1.12;
  color: #fff;
  letter-spacing: -0.025em;
  margin-bottom: 1.5rem;
}

.gradient-text {
  background: linear-gradient(120deg, var(--clr-accent) 0%, #7dd3fc 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero p {
  font-size: 1.15rem;
  color: rgba(255, 255, 255, 0.68);
  line-height: 1.75;
  max-width: 580px;
  margin-bottom: 2.5rem;
}

.hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

/* Ambient orbs */
.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(70px);
  pointer-events: none;
}
.hero-orb-1 {
  width: 550px; height: 550px;
  background: rgba(0, 180, 216, 0.18);
  top: -180px; right: -80px;
  animation: drift 9s ease-in-out infinite;
}
.hero-orb-2 {
  width: 380px; height: 380px;
  background: rgba(125, 211, 252, 0.12);
  bottom: -80px; left: 35%;
  animation: drift 11s ease-in-out infinite reverse;
}
.hero-orb-3 {
  width: 260px; height: 260px;
  background: rgba(167, 139, 250, 0.14);
  top: 35%; right: 22%;
  animation: drift 7s ease-in-out infinite 2s;
}
@keyframes drift {
  0%, 100% { transform: translateY(0) scale(1); }
  50% { transform: translateY(-22px) scale(1.03); }
}

/* ============================================================
   Services
   ============================================================ */
.services-section { background: var(--clr-bg-alt); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
}

.service-card {
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 2rem;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.service-card:hover {
  border-color: var(--clr-accent);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.service-icon-wrap {
  width: 54px; height: 54px;
  background: linear-gradient(135deg, rgba(0, 180, 216, 0.1), rgba(0, 180, 216, 0.2));
  border-radius: 14px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.4rem;
  color: var(--clr-accent);
  margin-bottom: 1.25rem;
  transition: all var(--transition);
}
.service-card:hover .service-icon-wrap {
  background: var(--clr-accent);
  color: var(--clr-primary);
}

.service-card h3 {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--clr-primary);
  margin-bottom: 0.6rem;
}
.service-card > p {
  color: var(--clr-muted);
  font-size: 0.875rem;
  line-height: 1.65;
  margin-bottom: 1.25rem;
}
.service-card ul {
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}
.service-card ul li {
  font-size: 0.825rem;
  color: var(--clr-text);
  padding-left: 1.1rem;
  position: relative;
}
.service-card ul li::before {
  content: '';
  position: absolute;
  left: 0; top: 50%;
  transform: translateY(-50%);
  width: 5px; height: 5px;
  border-radius: 50%;
  background: var(--clr-accent);
}

/* ============================================================
   About
   ============================================================ */
.about-section { background: var(--clr-bg); }

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: center;
}

.about-image {
  position: relative;
}
.about-image img {
  border-radius: var(--radius);
  width: 100%;
  max-height: 480px;
  object-fit: cover;
  box-shadow: var(--shadow-lg);
}
.about-badge {
  position: absolute;
  bottom: -1.25rem; left: -1.25rem;
  background: var(--clr-primary);
  color: #fff;
  padding: 1rem 1.5rem;
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  align-items: center;
  line-height: 1.2;
}
.badge-city {
  font-size: 1.5rem;
  font-weight: 800;
  color: var(--clr-accent);
}
.badge-text {
  font-size: 0.65rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.6);
  margin-top: 0.2rem;
}

.about-content .section-label { display: block; }
.about-content h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 800;
  color: var(--clr-primary);
  line-height: 1.2;
  letter-spacing: -0.025em;
  margin-bottom: 1rem;
}
.about-content > p {
  color: var(--clr-muted);
  line-height: 1.75;
  margin-bottom: 2rem;
}

.about-blocks {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}
.about-block {
  padding: 1.25rem 1.5rem;
  background: var(--clr-bg-alt);
  border-radius: var(--radius-sm);
  border-left: 3px solid var(--clr-accent);
}
.about-block h4 {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--clr-primary);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  margin-bottom: 0.4rem;
}
.about-block h4 i { color: var(--clr-accent); }
.about-block p {
  font-size: 0.85rem;
  color: var(--clr-muted);
  line-height: 1.65;
}

/* ============================================================
   Careers — Job Grid & Cards
   ============================================================ */
.careers-section { background: var(--clr-bg-alt); }

/* Loading / empty states */
.jobs-loading,
.jobs-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  padding: 3rem;
  color: var(--clr-muted);
  font-size: 1rem;
  text-align: center;
}
.jobs-loading i, .jobs-empty i { font-size: 2rem; color: var(--clr-accent); }

.jobs-updated {
  text-align: center;
  font-size: 0.75rem;
  color: var(--clr-muted);
  margin-top: 1.5rem;
}

/* Job grid */
.jobs-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  margin-bottom: 1rem;
}

/* Job card */
.job-card {
  background: var(--clr-bg);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.job-card:hover {
  border-color: var(--clr-accent);
  box-shadow: var(--shadow-lg);
  transform: translateY(-3px);
}

.job-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 1rem;
}
.job-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--clr-primary);
  line-height: 1.3;
  margin-bottom: 0.4rem;
}
.job-meta {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
}
.job-meta span {
  font-size: 0.78rem;
  color: var(--clr-muted);
  display: flex;
  align-items: center;
  gap: 0.3rem;
}
.job-meta i { color: var(--clr-accent); font-size: 0.7rem; }

.job-badge {
  flex-shrink: 0;
  background: rgba(0, 180, 216, 0.1);
  color: var(--clr-accent);
  border: 1px solid rgba(0, 180, 216, 0.25);
  border-radius: 50px;
  padding: 0.2em 0.8em;
  font-size: 0.7rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.job-desc {
  font-size: 0.85rem;
  color: var(--clr-muted);
  line-height: 1.65;
  flex: 1;
}

.job-apply-btn {
  align-self: flex-start;
  border-radius: 8px;
  font-size: 0.85rem;
  padding: 0.6em 1.4em;
}

/* ── Apply Modal ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(6, 14, 26, 0.75);
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
}

.modal-box {
  background: #fff;
  border-radius: var(--radius);
  padding: 2.5rem;
  width: 100%;
  max-width: 580px;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  box-shadow: 0 24px 64px rgba(6, 14, 26, 0.35);
}

.modal-box h3 {
  font-size: 1.3rem;
  font-weight: 800;
  color: var(--clr-primary);
  margin-bottom: 1.5rem;
  padding-right: 2rem;
  line-height: 1.3;
}

.modal-close {
  position: absolute;
  top: 1.25rem; right: 1.25rem;
  background: var(--clr-bg-alt);
  border: 1px solid var(--clr-border);
  border-radius: 8px;
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  color: var(--clr-muted);
  font-size: 0.9rem;
  cursor: pointer;
  transition: all var(--transition);
}
.modal-close:hover { background: #fee2e2; color: #991b1b; border-color: #fca5a5; }

/* File drop zone */
.file-hint {
  font-size: 0.72rem;
  font-weight: 400;
  color: var(--clr-muted);
  margin-left: 0.25rem;
}

.file-drop {
  border: 2px dashed var(--clr-border);
  border-radius: var(--radius-sm);
  padding: 1.5rem;
  text-align: center;
  cursor: pointer;
  transition: all var(--transition);
  color: var(--clr-muted);
  font-size: 0.875rem;
  position: relative;
}
.file-drop:hover, .file-drop.dragover {
  border-color: var(--clr-accent);
  background: rgba(0, 180, 216, 0.04);
  color: var(--clr-text);
}
.file-drop i { display: block; font-size: 1.75rem; color: var(--clr-accent); margin-bottom: 0.5rem; }
.file-drop input[type="file"] {
  position: absolute; inset: 0; opacity: 0; cursor: pointer; width: 100%; height: 100%;
}

/* old iframe board fallback — hidden */
.careers-board {
  border: 1px solid var(--clr-border);
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--clr-bg);
  box-shadow: var(--shadow);
  margin-bottom: 2rem;
}
.careers-board iframe {
  display: block;
  width: 100%;
  min-height: 650px;
  border: none;
}

.careers-cta { text-align: center; }
.careers-cta p {
  font-size: 0.8rem;
  color: var(--clr-muted);
  margin-top: 0.75rem;
}

/* ============================================================
   Contact
   ============================================================ */
.contact-section {
  background: linear-gradient(140deg, #060e1a 0%, #0d2244 50%, #0f3460 100%);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 5rem;
  align-items: start;
}

.contact-info .section-label { display: block; color: var(--clr-accent); }
.contact-info h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.2rem);
  font-weight: 800;
  color: #fff;
  line-height: 1.2;
  letter-spacing: -0.025em;
  margin-bottom: 1rem;
}
.contact-info > p {
  color: rgba(255, 255, 255, 0.62);
  line-height: 1.75;
  margin-bottom: 2rem;
}
.contact-details {
  display: flex;
  flex-direction: column;
  gap: 1rem;
}
.contact-detail {
  display: flex;
  align-items: center;
  gap: 0.85rem;
  color: rgba(255, 255, 255, 0.72);
  font-size: 0.9rem;
}
.contact-icon {
  width: 36px; height: 36px;
  background: rgba(0, 180, 216, 0.15);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--clr-accent);
  flex-shrink: 0;
  font-size: 0.875rem;
}
.contact-detail a:hover { color: var(--clr-accent); }

/* Form */
.contact-form-wrap {
  background: #fff;
  border-radius: var(--radius);
  padding: 2.5rem;
  box-shadow: var(--shadow-lg);
}

/* Submission deadline on job card */
.job-deadline {
  font-size: 0.8rem;
  font-weight: 600;
  color: #b45309;
  display: flex;
  align-items: center;
  gap: 0.4rem;
  margin-bottom: 1rem;
}

/* Job description / skills block inside apply modal */
.modal-job-desc {
  background: var(--clr-surface);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  padding: 1rem 1.25rem;
  margin-bottom: 1.5rem;
  max-height: 240px;
  overflow-y: auto;
}
.modal-desc-section + .modal-desc-section {
  margin-top: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--clr-border);
}
.modal-desc-section h4 {
  font-size: 0.8rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--clr-primary);
  margin-bottom: 0.4rem;
}
.modal-desc-section p {
  font-size: 0.875rem;
  color: var(--clr-text-muted);
  line-height: 1.6;
  white-space: pre-wrap;
}

.notify-banner {
  display: none;
  padding: 0.9rem 1.1rem;
  border-radius: var(--radius-sm);
  margin-bottom: 1.25rem;
  font-size: 0.85rem;
  font-weight: 600;
}
.notify-banner.success {
  background: #d1fae5; color: #065f46; border: 1px solid #a7f3d0;
}
.notify-banner.error {
  background: #fee2e2; color: #991b1b; border: 1px solid #fca5a5;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-bottom: 1rem;
}
.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
  margin-bottom: 1rem;
}
.form-group label {
  font-size: 0.78rem;
  font-weight: 600;
  color: var(--clr-text);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.form-group input,
.form-group textarea {
  font-family: var(--font);
  font-size: 0.9rem;
  color: var(--clr-text);
  background: var(--clr-bg-alt);
  border: 1.5px solid var(--clr-border);
  border-radius: var(--radius-sm);
  padding: 0.7rem 1rem;
  transition: all var(--transition);
  outline: none;
  resize: vertical;
  width: 100%;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--clr-accent);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(0, 180, 216, 0.12);
}
.form-group input::placeholder,
.form-group textarea::placeholder { color: #94a3b8; }

.contact-form-wrap .btn-primary {
  background: var(--clr-primary);
  border-color: var(--clr-primary);
  font-size: 0.95rem;
  border-radius: 8px;
}
.contact-form-wrap .btn-primary:hover {
  background: var(--clr-secondary);
  border-color: var(--clr-secondary);
}

/* ============================================================
   Footer
   ============================================================ */
#footer {
  background: var(--clr-bg-dark);
  padding: 4rem 0 2rem;
  color: rgba(255, 255, 255, 0.45);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 3rem;
  padding-bottom: 3rem;
  margin-bottom: 2rem;
  border-bottom: 1px solid rgba(255, 255, 255, 0.06);
}

.footer-brand .nav-logo { color: #fff; margin-bottom: 1rem; }
.footer-brand p {
  font-size: 0.85rem;
  line-height: 1.65;
  color: rgba(255, 255, 255, 0.4);
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: rgba(255, 255, 255, 0.55);
  margin-bottom: 1rem;
}
.footer-col ul {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}
.footer-col ul li,
.footer-col ul a {
  font-size: 0.85rem;
  color: rgba(255, 255, 255, 0.4);
  transition: color var(--transition);
}
.footer-col ul a:hover { color: var(--clr-accent); }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
}
.footer-bottom p { font-size: 0.8rem; }

.footer-social {
  display: flex;
  gap: 0.6rem;
}
.footer-social a {
  width: 34px; height: 34px;
  background: rgba(255, 255, 255, 0.05);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: rgba(255, 255, 255, 0.45);
  font-size: 0.85rem;
  transition: all var(--transition);
}
.footer-social a:hover {
  background: var(--clr-accent);
  color: var(--clr-primary);
}

/* ============================================================
   Responsive
   ============================================================ */
@media (max-width: 960px) {
  .about-grid,
  .contact-grid {
    grid-template-columns: 1fr;
    gap: 3rem;
  }
  .about-badge {
    bottom: -0.75rem;
    left: -0.5rem;
  }
  .contact-grid { gap: 2.5rem; }
  .footer-grid { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 640px) {
  .container { padding: 0 1.25rem; }
  .section { padding: 4rem 0; }
  .section-header { margin-bottom: 2.5rem; }

  /* Mobile nav */
  .nav-links {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(6, 14, 26, 0.97);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    z-index: 999;
  }
  .nav-links.open { display: flex; }
  .nav-links a { font-size: 1.1rem; padding: 0.7rem 2rem; }
  .nav-toggle { display: block; }

  .hero { padding: 7rem 0 4rem; }
  .hero-actions { flex-direction: column; }
  .hero-actions .btn { width: 100%; }

  .form-row { grid-template-columns: 1fr; }

  .footer-grid { grid-template-columns: 1fr; }
  .footer-brand { grid-column: auto; }
  .footer-bottom { flex-direction: column; text-align: center; }

  .careers-board iframe { min-height: 480px; }
}