/* ============================================================
   Stratus Aeronautical — Black & White Modern
   ============================================================ */

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

:root {
  --black:    #0A0A0A;
  --black-2:  #111111;
  --black-3:  #1A1A1A;
  --black-4:  #252525;
  --white:    #F4F4F2;
  --white-2:  #E8E8E6;
  --gray-1:   #AAAAAA;
  --gray-2:   #666666;
  --gray-3:   #333333;
  --border-d: rgba(255, 255, 255, 0.09);
  --border-l: rgba(0, 0, 0, 0.10);

  --font-ui:   'Space Grotesk', 'Inter', sans-serif;
  --font-body: 'Inter', sans-serif;
  --max-w: 1160px;
}

html { scroll-behavior: smooth; }

body {
  background: var(--black);
  color: var(--white);
  font-family: var(--font-body);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; }
img, svg { display: block; }

.container {
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 32px;
}

/* ── Scroll reveal ── */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s cubic-bezier(0.22, 1, 0.36, 1),
              transform 0.7s cubic-bezier(0.22, 1, 0.36, 1);
}
.reveal.visible { opacity: 1; transform: none; }

/* ────────────────────────────────────────────────────────────
   NAVIGATION
──────────────────────────────────────────────────────────── */
#navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  padding: 0 32px;
  transition: background 0.3s, border-color 0.3s;
}

#navbar.scrolled {
  background: rgba(10, 10, 10, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-d);
}

.nav-inner {
  max-width: var(--max-w);
  margin: 0 auto;
  height: 64px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  display: flex;
  align-items: center;
  gap: 10px;
}

.logo-mark { color: var(--white); flex-shrink: 0; }

.logo-img {
  height: 32px;
  width: auto;
  display: block;
  object-fit: contain;
}

.logo-img--sm {
  height: 24px;
}

.logo-name {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--white);
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 28px;
}

.nav-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-ui);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.18em;
  color: var(--gray-1);
  text-transform: uppercase;
}

.badge-dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--white);
  animation: pulse 2.4s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.3; }
}

.nav-link {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  color: var(--white);
  border-bottom: 1px solid var(--white);
  padding-bottom: 1px;
  transition: opacity 0.2s;
}
.nav-link:hover { opacity: 0.6; }

.nav-menu {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}

.menu-bar {
  display: block;
  width: 22px; height: 1px;
  background: var(--white);
}

/* ────────────────────────────────────────────────────────────
   RENDER PLACEHOLDER SYSTEM
──────────────────────────────────────────────────────────── */
.render-box {
  position: relative;
  aspect-ratio: 4 / 3;
  background: var(--black-2);
  border: 1px solid var(--border-d);
  overflow: hidden;
  /* Dot grid */
  background-image: radial-gradient(circle, rgba(255,255,255,0.05) 1px, transparent 1px);
  background-size: 22px 22px;
}

/* Diagonal cross lines */
.render-box::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(
      to bottom right,
      transparent calc(50% - 0.5px),
      rgba(255,255,255,0.06) calc(50% - 0.5px),
      rgba(255,255,255,0.06) calc(50% + 0.5px),
      transparent calc(50% + 0.5px)
    ),
    linear-gradient(
      to top right,
      transparent calc(50% - 0.5px),
      rgba(255,255,255,0.06) calc(50% - 0.5px),
      rgba(255,255,255,0.06) calc(50% + 0.5px),
      transparent calc(50% + 0.5px)
    );
  pointer-events: none;
}

.render-box--tall  { aspect-ratio: 3 / 4; }
.render-box--wide  { aspect-ratio: 16 / 9; }
.render-box--sq    { aspect-ratio: 1; }

/* Light variant (used in light sections) */
.render-box--light {
  background: var(--white-2);
  border-color: var(--border-l);
  background-image: radial-gradient(circle, rgba(0,0,0,0.06) 1px, transparent 1px);
  background-size: 22px 22px;
}

.render-box--light::before {
  background:
    linear-gradient(
      to bottom right,
      transparent calc(50% - 0.5px),
      rgba(0,0,0,0.06) calc(50% - 0.5px),
      rgba(0,0,0,0.06) calc(50% + 0.5px),
      transparent calc(50% + 0.5px)
    ),
    linear-gradient(
      to top right,
      transparent calc(50% - 0.5px),
      rgba(0,0,0,0.06) calc(50% - 0.5px),
      rgba(0,0,0,0.06) calc(50% + 0.5px),
      transparent calc(50% + 0.5px)
    );
}

/* Corner marks */
.rc {
  position: absolute;
  width: 14px; height: 14px;
  z-index: 1;
}
.rc::before, .rc::after {
  content: '';
  position: absolute;
  background: rgba(255,255,255,0.4);
}
.rc::before { width: 100%; height: 1px; top: 0; left: 0; }
.rc::after  { width: 1px; height: 100%; top: 0; left: 0; }

.rc.tl { top:    0; left:  0; }
.rc.tr { top:    0; right: 0; transform: scaleX(-1); }
.rc.bl { bottom: 0; left:  0; transform: scaleY(-1); }
.rc.br { bottom: 0; right: 0; transform: scale(-1); }

/* Dark variant corners (for light sections) */
.rc--dark::before, .rc--dark::after { background: rgba(0,0,0,0.25); }

/* Center crosshair */
.render-center {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 1;
}

/* Label */
.render-label {
  position: absolute;
  bottom: 14px;
  left: 16px;
  font-family: var(--font-ui);
  font-size: 9px;
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.2);
  z-index: 2;
}

.render-label--dark { color: rgba(0,0,0,0.18); }

/* ────────────────────────────────────────────────────────────
   CTA ARROW LINK
──────────────────────────────────────────────────────────── */
.cta-arrow {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--white);
  transition: gap 0.25s;
}
.cta-arrow:hover { gap: 16px; }

.cta-arrow--dark { color: var(--black); }

/* ────────────────────────────────────────────────────────────
   HERO
──────────────────────────────────────────────────────────── */
#hero {
  position: relative;
  min-height: 100vh;
  padding: 140px 32px 80px;
  display: flex;
  align-items: center;
  overflow: hidden;
  background: var(--black);
  max-width: 100%;
}

/* Subtle top-left scan line grid overlay */
#hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.025) 1px, transparent 1px),
    linear-gradient(90deg, rgba(255,255,255,0.025) 1px, transparent 1px);
  background-size: 80px 80px;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  z-index: 1;
  max-width: var(--max-w);
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: center;
}

.hero-eyebrow {
  font-family: var(--font-ui);
  font-size: 10px;
  font-weight: 600;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gray-1);
  margin-bottom: 28px;
}

.hero-title {
  font-family: var(--font-ui);
  font-size: clamp(52px, 7.5vw, 96px);
  font-weight: 800;
  line-height: 0.97;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 32px;
}

.hero-sub {
  font-size: 15px;
  line-height: 1.75;
  color: var(--gray-1);
  max-width: 400px;
  margin-bottom: 40px;
}

.hero-right {
  position: relative;
}

/* Hero logo image */
.hero-logo-img {
  width: 100%;
  max-width: 480px;
  height: auto;
  object-fit: contain;
  display: block;
}

/* Real product image */
.product-img {
  width: 100%;
  height: 100%;
  min-height: 360px;
  object-fit: contain;
  display: block;
  background: var(--black-2);
}

.render-note {
  margin-top: 14px;
  font-family: var(--font-ui);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--gray-2);
  text-align: left;
}

/* Large background number */
.hero-number {
  position: absolute;
  bottom: 80px;
  right: 32px;
  font-family: var(--font-ui);
  font-size: clamp(120px, 18vw, 220px);
  font-weight: 800;
  color: rgba(255, 255, 255, 0.03);
  line-height: 1;
  pointer-events: none;
  user-select: none;
  letter-spacing: -0.05em;
}


/* ────────────────────────────────────────────────────────────
   STATEMENT (light section)
──────────────────────────────────────────────────────────── */
#statement {
  background: var(--white);
  color: var(--black);
  padding: 100px 0;
}

.statement-label {
  font-family: var(--font-ui);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gray-2);
  margin-bottom: 28px;
}

.statement-text {
  font-family: var(--font-ui);
  font-size: clamp(32px, 5vw, 64px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.025em;
  color: var(--black);
  margin-bottom: 48px;
}

.statement-pills {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}

.statement-pills span {
  padding: 8px 18px;
  border: 1px solid rgba(0,0,0,0.15);
  border-radius: 100px;
  font-family: var(--font-ui);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--black);
}

/* ────────────────────────────────────────────────────────────
   PRODUCTS (dark)
──────────────────────────────────────────────────────────── */
#products {
  background: var(--black);
  padding: 100px 0;
}

.section-header {
  display: flex;
  align-items: baseline;
  gap: 20px;
  margin-bottom: 64px;
}

.section-num {
  font-family: var(--font-ui);
  font-size: clamp(48px, 7vw, 80px);
  font-weight: 800;
  color: rgba(255,255,255,0.07);
  line-height: 1;
  letter-spacing: -0.05em;
}

.section-tag {
  font-family: var(--font-ui);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gray-1);
}

/* Product row */
.product-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.product-row--flip {
  direction: rtl;
}
.product-row--flip > * { direction: ltr; }

.product-divider {
  height: 1px;
  background: var(--border-d);
  margin: 72px 0;
}

.product-num {
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.2em;
  color: var(--gray-2);
  display: block;
  margin-bottom: 20px;
}

.product-info h3 {
  font-family: var(--font-ui);
  font-size: clamp(28px, 3.5vw, 44px);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  color: var(--white);
  margin-bottom: 20px;
}

.product-info p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--gray-1);
  max-width: 380px;
  margin-bottom: 28px;
}

.status-tag {
  display: inline-flex;
  align-items: center;
  padding: 6px 14px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 100px;
  font-family: var(--font-ui);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray-1);
}

/* ────────────────────────────────────────────────────────────
   ABOUT (light)
──────────────────────────────────────────────────────────── */
#about {
  background: var(--white);
  color: var(--black);
  padding: 100px 0;
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.about-label {
  font-family: var(--font-ui);
  font-size: 10px;
  font-weight: 700;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--gray-2);
  margin-bottom: 24px;
}

.about-text h2 {
  font-family: var(--font-ui);
  font-size: clamp(32px, 4.5vw, 56px);
  font-weight: 800;
  line-height: 1.08;
  letter-spacing: -0.025em;
  color: var(--black);
  margin-bottom: 24px;
}

.about-text p {
  font-size: 15px;
  line-height: 1.75;
  color: var(--gray-2);
  margin-bottom: 36px;
}

.about-render-note {
  margin-top: 14px;
  font-family: var(--font-ui);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.1em;
  color: var(--gray-2);
}

/* ────────────────────────────────────────────────────────────
   SIGNUP (dark)
──────────────────────────────────────────────────────────── */
#signup {
  background: var(--black);
  padding: 100px 0;
  border-top: 1px solid var(--border-d);
}

.signup-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 80px;
  align-items: start;
}

.signup-num {
  font-family: var(--font-ui);
  font-size: clamp(80px, 12vw, 140px);
  font-weight: 800;
  color: rgba(255,255,255,0.04);
  line-height: 1;
  letter-spacing: -0.05em;
  margin-bottom: -24px;
}

.signup-title {
  font-family: var(--font-ui);
  font-size: clamp(40px, 5.5vw, 72px);
  font-weight: 800;
  line-height: 1.0;
  letter-spacing: -0.03em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: 24px;
}

.signup-sub {
  font-size: 15px;
  line-height: 1.75;
  color: var(--gray-1);
  max-width: 400px;
}

/* Form */
.signup-right { padding-top: 12px; }

.form-label {
  display: block;
  font-family: var(--font-ui);
  font-size: 9px;
  font-weight: 700;
  letter-spacing: 0.22em;
  text-transform: uppercase;
  color: var(--gray-2);
  margin-bottom: 12px;
}

.form-row {
  display: flex;
  gap: 0;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: 0;
}

.form-row input[type="email"] {
  flex: 1;
  padding: 16px 20px;
  background: transparent;
  border: none;
  color: var(--white);
  font-family: var(--font-body);
  font-size: 14px;
  outline: none;
  min-width: 0;
}

.form-row input[type="email"]::placeholder { color: var(--gray-2); }

.form-row input[type="email"]:focus {
  border-bottom: 1px solid var(--white);
}

.form-row input[type="email"].error {
  border-bottom: 1px solid #EF4444;
}

.form-row button {
  padding: 16px 24px;
  background: var(--white);
  color: var(--black);
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: opacity 0.2s;
  white-space: nowrap;
  position: relative;
}
.form-row button:hover { opacity: 0.8; }

.btn-loading {
  display: none;
  position: absolute;
  inset: 0;
  align-items: center;
  justify-content: center;
  background: var(--white);
}

.spinner {
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.form-row button.loading .btn-label { opacity: 0; }
.form-row button.loading .btn-loading { display: flex; }

.form-hint {
  margin-top: 14px;
  font-size: 11px;
  color: var(--gray-2);
  font-family: var(--font-ui);
  letter-spacing: 0.04em;
}

.form-hint a {
  color: var(--gray-1);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.field-error {
  font-family: var(--font-ui);
  font-size: 11px;
  color: #EF4444;
  letter-spacing: 0.04em;
  min-height: 16px;
  margin-top: 6px;
}


.consent-wrap {
  margin-top: 14px;
}

.consent-label {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  font-family: var(--font-ui);
  font-size: 11px;
  line-height: 1.5;
  color: var(--gray-2);
  letter-spacing: 0.03em;
  cursor: pointer;
}

.consent-label input[type="checkbox"] {
  flex-shrink: 0;
  margin-top: 2px;
  accent-color: var(--white);
  width: 14px;
  height: 14px;
  cursor: pointer;
}

.consent-label a {
  color: var(--gray-1);
  text-decoration: underline;
  text-underline-offset: 2px;
}

.form-success {
  display: none;
  align-items: center;
  gap: 10px;
  margin-top: 16px;
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--white);
}
.form-success.visible { display: flex; }

/* ────────────────────────────────────────────────────────────
   FOOTER
──────────────────────────────────────────────────────────── */
#footer {
  background: var(--black);
  padding: 40px 0;
  border-top: 1px solid var(--border-d);
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 32px;
}

.footer-logo .logo-name { font-size: 10px; }

.footer-domain {
  font-family: var(--font-ui);
  font-size: 10px;
  font-weight: 500;
  letter-spacing: 0.12em;
  color: var(--gray-2);
  margin-top: 4px;
  margin-left: 32px;
}

.social-links { display: flex; align-items: center; gap: 4px; }

.social-link {
  width: 38px; height: 38px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid transparent;
  color: var(--gray-2);
  transition: color 0.2s, border-color 0.2s;
}
.social-link:hover {
  color: var(--white);
  border-color: var(--border-d);
}

.footer-address {
  font-style: normal;
  font-family: var(--font-ui);
  font-size: 10px;
  letter-spacing: 0.06em;
  color: var(--gray-2);
  line-height: 1.7;
  margin-top: 8px;
  margin-left: 28px;
}

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--font-ui);
  font-size: 11px;
  letter-spacing: 0.06em;
  color: var(--gray-2);
}

.footer-legal {
  display: flex;
  gap: 20px;
}

.footer-legal a {
  color: var(--gray-2);
  font-family: var(--font-ui);
  font-size: 11px;
  letter-spacing: 0.06em;
  transition: color 0.2s;
}

.footer-legal a:hover { color: var(--white); }

/* ────────────────────────────────────────────────────────────
   LEGAL PAGES (terms, privacy, unsubscribe)
──────────────────────────────────────────────────────────── */
.legal-page { max-width: 720px; margin: 0 auto; padding: 120px 32px 80px; }
.legal-page h1 { font-family: var(--font-ui); font-size: clamp(32px, 5vw, 52px); font-weight: 800; letter-spacing: -0.02em; margin-bottom: 8px; }
.legal-page .meta { font-family: var(--font-ui); font-size: 11px; letter-spacing: 0.12em; color: var(--gray-2); text-transform: uppercase; margin-bottom: 52px; }
.legal-page h2 { font-family: var(--font-ui); font-size: 16px; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; color: var(--white); margin: 40px 0 12px; }
.legal-page p, .legal-page li { font-size: 15px; line-height: 1.8; color: var(--gray-1); margin-bottom: 14px; }
.legal-page ul { padding-left: 20px; margin-bottom: 14px; }
.legal-page a { color: var(--white); text-decoration: underline; text-underline-offset: 3px; }
.legal-back { display: inline-flex; align-items: center; gap: 8px; font-family: var(--font-ui); font-size: 12px; font-weight: 600; letter-spacing: 0.12em; text-transform: uppercase; color: var(--gray-2); margin-bottom: 48px; transition: color 0.2s; }
.legal-back:hover { color: var(--white); }

/* Utility */
.hidden { display: none !important; }

/* Unsubscribe page */
.unsub-email {
  display: inline-block;
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  color: var(--white);
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.1);
  padding: 10px 18px;
  margin: 8px 0 32px;
  word-break: break-all;
}

.unsub-btn {
  display: inline-block;
  padding: 16px 36px;
  background: var(--white);
  color: var(--black);
  font-family: var(--font-ui);
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  border: none;
  cursor: pointer;
  transition: opacity 0.2s;
}
.unsub-btn:hover { opacity: 0.8; }
.unsub-btn:disabled { opacity: 0.4; cursor: not-allowed; }

.unsub-state { margin-top: 28px; }

.state-success {
  display: none;
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: var(--white);
}
.state-success.visible { display: block; }

.state-error {
  display: none;
  font-family: var(--font-ui);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: 0.04em;
  color: #EF4444;
}
.state-error.visible { display: block; }

.state-invalid { font-family: var(--font-ui); font-size: 14px; color: var(--gray-1); }

/* ────────────────────────────────────────────────────────────
   RESPONSIVE
──────────────────────────────────────────────────────────── */
@media (max-width: 768px) {
  .container { padding: 0 20px; }
  #hero { padding: 120px 20px 80px; }

  .hero-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .product-row,
  .product-row--flip {
    grid-template-columns: 1fr;
    gap: 36px;
    direction: ltr;
  }

  .about-grid {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .signup-inner {
    grid-template-columns: 1fr;
    gap: 48px;
  }

  .hero-number { display: none; }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
  }

  .footer-domain { margin-left: 28px; }
}

@media (max-width: 480px) {
  .form-row { flex-direction: column; }
  .form-row button { width: 100%; }
  .nav-badge { display: none; }
}