/* style.css — TBK The Belt Keeper Design System */

/* ============================================================
   DESIGN TOKENS
   Palette: White/off-white base + Amber/gold accent (from TBK closing card)
   Tone: Clean, minimal, professional with active/lifestyle energy
   ============================================================ */

:root,
[data-theme='light'] {
  /* Type scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);
  --text-hero: clamp(3rem,     0.5rem  + 7vw,    8rem);

  /* Spacing */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* TBK Color Palette — Light Mode */
  /* White/off-white surfaces (per Joseph's brief) */
  --color-bg:         #FAFAF8;
  --color-surface:    #FFFFFF;
  --color-surface-2:  #F5F4F0;
  --color-surface-3:  #EEECE6;
  --color-border:     #E2E0DA;
  --color-divider:    #ECEAE5;

  /* Text */
  --color-text:       #1A1916;
  --color-text-muted: #6B6A65;
  --color-text-faint: #B0AFA9;

  /* Accent — Amber/Gold from TBK closing card */
  --color-accent:       #C8860A;
  --color-accent-hover: #A36C05;
  --color-accent-light: #FFF3D6;
  --color-accent-warm:  #F5A623;

  /* Dark surfaces for hero overlays */
  --color-dark:        #111010;
  --color-dark-surface: #1C1B18;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(26,25,22,0.06);
  --shadow-md: 0 4px 16px rgba(26,25,22,0.08);
  --shadow-lg: 0 12px 40px rgba(26,25,22,0.12);

  /* Radius */
  --radius-sm:   0.25rem;
  --radius-md:   0.5rem;
  --radius-lg:   0.75rem;
  --radius-xl:   1.25rem;
  --radius-full: 9999px;

  /* Content widths */
  --content-narrow:  640px;
  --content-default: 960px;
  --content-wide:    1200px;

  /* Fonts — Instrument Serif (headings, luxury/lifestyle) + Switzer (body, clean/modern) */
  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body:    'Switzer', 'Inter', 'Helvetica Neue', sans-serif;
}

/* DARK MODE */
[data-theme='dark'] {
  --color-bg:         #111010;
  --color-surface:    #1A1916;
  --color-surface-2:  #211F1B;
  --color-surface-3:  #2A2823;
  --color-border:     #363430;
  --color-divider:    #2C2A26;
  --color-text:       #E8E6E0;
  --color-text-muted: #8A8880;
  --color-text-faint: #5A5955;
  --color-accent:       #E8A020;
  --color-accent-hover: #F5B833;
  --color-accent-light: #2A2210;
  --color-accent-warm:  #F5A623;
  --color-dark:         #0A0A09;
  --color-dark-surface: #111010;
  --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
  --shadow-md: 0 4px 16px rgba(0,0,0,0.35);
  --shadow-lg: 0 12px 40px rgba(0,0,0,0.45);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:         #111010;
    --color-surface:    #1A1916;
    --color-surface-2:  #211F1B;
    --color-surface-3:  #2A2823;
    --color-border:     #363430;
    --color-divider:    #2C2A26;
    --color-text:       #E8E6E0;
    --color-text-muted: #8A8880;
    --color-text-faint: #5A5955;
    --color-accent:       #E8A020;
    --color-accent-hover: #F5B833;
    --color-accent-light: #2A2210;
    --color-accent-warm:  #F5A623;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.25);
    --shadow-md: 0 4px 16px rgba(0,0,0,0.35);
    --shadow-lg: 0 12px 40px rgba(0,0,0,0.45);
  }
}

/* ============================================================
   LAYOUT UTILITIES
   ============================================================ */

.container {
  width: min(var(--content-wide), 100% - var(--space-8));
  margin-inline: auto;
}
.container--narrow {
  width: min(var(--content-narrow), 100% - var(--space-8));
  margin-inline: auto;
}
.container--default {
  width: min(var(--content-default), 100% - var(--space-8));
  margin-inline: auto;
}

/* ============================================================
   NAVIGATION
   ============================================================ */

.site-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: oklch(from var(--color-bg) l c h / 0.92);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.site-nav.scrolled {
  border-bottom-color: var(--color-border);
  box-shadow: var(--shadow-sm);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
  width: min(var(--content-wide), 100% - var(--space-8));
  margin-inline: auto;
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.nav-logo-mark {
  width: 36px;
  height: 36px;
  flex-shrink: 0;
}

.nav-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.1;
}

.nav-logo-name {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 400;
  letter-spacing: 0.06em;
  color: var(--color-text);
  text-transform: uppercase;
}

.nav-logo-tagline {
  font-family: var(--font-body);
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--color-accent);
  font-weight: 500;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

.nav-links a {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.04em;
  text-decoration: none;
  color: var(--color-text-muted);
  text-transform: uppercase;
  white-space: nowrap;
}

.nav-links a:hover {
  color: var(--color-text);
}

.nav-cta {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--color-dark) !important;
  background: var(--color-accent);
  padding: var(--space-2) var(--space-5);
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.nav-cta:hover {
  background: var(--color-accent-hover) !important;
  color: var(--color-surface) !important;
}

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

.theme-toggle {
  width: 36px;
  height: 36px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-full);
  color: var(--color-text-muted);
  cursor: pointer;
  border: 1px solid var(--color-border);
  background: none;
}

.theme-toggle:hover {
  color: var(--color-text);
  border-color: var(--color-text-muted);
}

.nav-hamburger {
  display: none;
  width: 36px;
  height: 36px;
  align-items: center;
  justify-content: center;
  border-radius: var(--radius-md);
  color: var(--color-text);
  cursor: pointer;
  border: 1px solid var(--color-border);
  background: none;
}

/* Mobile nav */
.mobile-menu {
  display: none;
  position: fixed;
  top: 68px;
  left: 0;
  right: 0;
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: var(--space-6) var(--space-6);
  z-index: 99;
  flex-direction: column;
  gap: var(--space-4);
  box-shadow: var(--shadow-md);
}

.mobile-menu.open {
  display: flex;
}

.mobile-menu a {
  font-family: var(--font-body);
  font-size: var(--text-base);
  font-weight: 500;
  text-decoration: none;
  color: var(--color-text);
  letter-spacing: 0.04em;
  text-transform: uppercase;
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--color-divider);
}

.mobile-menu a:last-child {
  border-bottom: none;
  color: var(--color-accent);
}

/* ============================================================
   HERO SECTION
   ============================================================ */

.hero {
  min-height: 100dvh;
  position: relative;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  overflow: hidden;
  background: var(--color-dark);
}

.hero-video-container {
  position: absolute;
  inset: 0;
  overflow: hidden;
}

.hero-video-bg {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.75;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(10,10,9,0.1) 0%,
    rgba(10,10,9,0.15) 40%,
    rgba(10,10,9,0.65) 80%,
    rgba(10,10,9,0.88) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 2;
  padding: var(--space-20) 0 var(--space-16);
  width: min(var(--content-wide), 100% - var(--space-8));
  margin-inline: auto;
}

.hero-eyebrow {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.hero-headline {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 400;
  color: #FFFFFF;
  line-height: 1.05;
  margin-bottom: var(--space-6);
  max-width: 18ch;
}

.hero-sub {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: rgba(255,255,255,0.75);
  max-width: 52ch;
  line-height: 1.65;
  margin-bottom: var(--space-10);
}

.hero-actions {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  color: #111010;
  background: var(--color-accent-warm);
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  white-space: nowrap;
}

.btn-primary:hover {
  background: var(--color-accent);
  color: #FFFFFF;
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(200,134,10,0.35);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  color: rgba(255,255,255,0.85);
  background: transparent;
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-full);
  border: 1px solid rgba(255,255,255,0.35);
  cursor: pointer;
  white-space: nowrap;
}

.btn-outline:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.6);
  color: #FFFFFF;
}

.hero-scroll-hint {
  position: absolute;
  bottom: var(--space-8);
  right: var(--space-8);
  z-index: 2;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  color: rgba(255,255,255,0.45);
  font-family: var(--font-body);
  font-size: var(--text-xs);
  letter-spacing: 0.12em;
  text-transform: uppercase;
}

/* ============================================================
   VIDEO MODAL
   ============================================================ */

.video-modal {
  display: none;
  position: fixed;
  inset: 0;
  z-index: 200;
  background: rgba(0,0,0,0.92);
  align-items: center;
  justify-content: center;
  padding: var(--space-8);
}

.video-modal.active {
  display: flex;
}

.video-modal-inner {
  position: relative;
  width: 100%;
  max-width: 900px;
}

.video-modal video {
  width: 100%;
  border-radius: var(--radius-lg);
}

.video-modal-close {
  position: absolute;
  top: -var(--space-10);
  right: 0;
  top: -40px;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(255,255,255,0.1);
  border: 1px solid rgba(255,255,255,0.2);
  border-radius: var(--radius-full);
  color: #fff;
  cursor: pointer;
  font-size: 20px;
  line-height: 1;
}

.video-modal-close:hover {
  background: rgba(255,255,255,0.2);
}

/* ============================================================
   SECTION SHARED
   ============================================================ */

.section-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--color-accent);
  margin-bottom: var(--space-4);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 400;
  color: var(--color-text);
  line-height: 1.1;
  margin-bottom: var(--space-5);
}

.section-body {
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
  max-width: 60ch;
}

/* ============================================================
   INTRO / TAGLINE STRIP
   ============================================================ */

.intro-strip {
  background: var(--color-dark);
  padding: var(--space-10) 0;
  overflow: hidden;
}

.tagline-scroll {
  display: flex;
  gap: var(--space-12);
  white-space: nowrap;
  animation: marquee 22s linear infinite;
}

.tagline-scroll span {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  color: rgba(255,255,255,0.12);
  font-weight: 400;
  letter-spacing: 0.04em;
  flex-shrink: 0;
}

.tagline-scroll span.accent {
  color: var(--color-accent);
  opacity: 0.85;
}

@keyframes marquee {
  0%   { transform: translateX(0); }
  100% { transform: translateX(-50%); }
}

/* ============================================================
   PRODUCT INTRO
   ============================================================ */

.product-intro {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0;
  background: var(--color-bg);
}

.product-intro-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.product-intro-media {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--color-surface-2);
  aspect-ratio: 4/5;
}

.product-intro-media img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.product-intro-badge {
  position: absolute;
  bottom: var(--space-6);
  left: var(--space-6);
  background: rgba(10,10,9,0.85);
  backdrop-filter: blur(8px);
  border: 1px solid rgba(200,134,10,0.3);
  border-radius: var(--radius-lg);
  padding: var(--space-3) var(--space-5);
}

.product-intro-badge p {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: var(--color-accent);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  max-width: none;
}

.product-intro-text .section-body {
  margin-bottom: var(--space-8);
}

.feature-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  margin-bottom: var(--space-10);
}

.feature-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  font-family: var(--font-body);
  font-size: var(--text-base);
  color: var(--color-text);
  max-width: none;
}

.feature-list li::before {
  content: '';
  width: 6px;
  height: 6px;
  background: var(--color-accent);
  border-radius: var(--radius-full);
  flex-shrink: 0;
  margin-top: 0.55em;
}

/* ============================================================
   HOW IT WORKS
   ============================================================ */

.how-it-works {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0;
  background: var(--color-surface-2);
}

.how-header {
  text-align: center;
  margin-bottom: var(--space-16);
}

.how-header .section-label {
  display: block;
}

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

.step-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.step-image {
  aspect-ratio: 3/2;
  overflow: hidden;
}

.step-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.step-card:hover .step-image img {
  transform: scale(1.03);
}

.step-body {
  padding: var(--space-6);
}

.step-number {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 400;
  color: var(--color-accent);
  line-height: 1;
  margin-bottom: var(--space-3);
  opacity: 0.6;
}

.step-title {
  font-family: var(--font-body);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.step-desc {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
  max-width: none;
}

/* ============================================================
   LIFESTYLE / USE CASES
   ============================================================ */

.lifestyle {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0;
  background: var(--color-bg);
}

.lifestyle-header {
  margin-bottom: var(--space-12);
}

.lifestyle-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  grid-template-rows: auto auto;
  gap: var(--space-4);
}

.lifestyle-card {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: var(--color-surface-2);
}

.lifestyle-card.large {
  grid-row: span 2;
}

.lifestyle-card img {
  width: 100%;
  height: 100%;
  min-height: 280px;
  object-fit: cover;
  transition: transform 0.6s ease;
}

.lifestyle-card:hover img {
  transform: scale(1.03);
}

.lifestyle-card-label {
  position: absolute;
  bottom: var(--space-5);
  left: var(--space-5);
  background: rgba(10,10,9,0.72);
  backdrop-filter: blur(8px);
  border-radius: var(--radius-md);
  padding: var(--space-2) var(--space-4);
}

.lifestyle-card-label p {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.9);
  max-width: none;
}

/* ============================================================
   TECH / PATENT
   ============================================================ */

.tech-section {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0;
  background: var(--color-dark);
  color: #FFFFFF;
}

.tech-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
}

.tech-text .section-label {
  color: var(--color-accent);
}

.tech-text .section-title {
  color: #FFFFFF;
}

.tech-text .section-body {
  color: rgba(255,255,255,0.65);
  margin-bottom: var(--space-8);
}

.patent-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-3);
  background: rgba(200,134,10,0.12);
  border: 1px solid rgba(200,134,10,0.3);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-6);
  margin-bottom: var(--space-4);
}

.patent-badge-icon {
  width: 32px;
  height: 32px;
  flex-shrink: 0;
}

.patent-badge-text {
  display: flex;
  flex-direction: column;
}

.patent-badge-text strong {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-accent);
}

.patent-badge-text span {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.45);
  font-family: monospace;
  letter-spacing: 0.05em;
}

.tech-specs {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-top: var(--space-6);
}

.spec-item {
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
  border-radius: var(--radius-lg);
  padding: var(--space-4) var(--space-5);
}

.spec-value {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 400;
  color: var(--color-accent);
  display: block;
  line-height: 1.1;
  margin-bottom: var(--space-1);
}

.spec-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.4);
  text-transform: uppercase;
  letter-spacing: 0.1em;
}

.tech-visual {
  position: relative;
}

.tech-visual-img {
  width: 100%;
  border-radius: var(--radius-xl);
  overflow: hidden;
  background: rgba(255,255,255,0.04);
  border: 1px solid rgba(255,255,255,0.08);
}

.tech-visual-img img {
  width: 100%;
  height: auto;
  opacity: 0.88;
}

/* ============================================================
   VIDEO PROMO SECTION
   ============================================================ */

.promo-section {
  padding: clamp(var(--space-16), 8vw, var(--space-32)) 0;
  background: var(--color-surface-2);
}

.promo-header {
  text-align: center;
  margin-bottom: var(--space-12);
}

.promo-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

.promo-card {
  position: relative;
  border-radius: var(--radius-xl);
  overflow: hidden;
  aspect-ratio: 16/9;
  cursor: pointer;
  background: var(--color-dark);
}

.promo-card-thumb {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.8;
  transition: opacity 0.3s ease, transform 0.6s ease;
}

.promo-card:hover .promo-card-thumb {
  opacity: 1;
  transform: scale(1.02);
}

.promo-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to bottom, transparent 40%, rgba(0,0,0,0.7) 100%);
}

.promo-play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  width: 64px;
  height: 64px;
  background: rgba(255,255,255,0.12);
  backdrop-filter: blur(8px);
  border: 2px solid rgba(255,255,255,0.3);
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  color: #FFFFFF;
  transition: background 0.25s ease, transform 0.25s ease;
}

.promo-card:hover .promo-play-btn {
  background: var(--color-accent);
  border-color: var(--color-accent);
  transform: translate(-50%, -50%) scale(1.1);
}

.promo-card-info {
  position: absolute;
  bottom: var(--space-5);
  left: var(--space-5);
}

.promo-card-title {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  color: #FFFFFF;
  letter-spacing: 0.04em;
}

.promo-card-desc {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.55);
  max-width: none;
}

/* ============================================================
   INTEREST CAPTURE / CTA
   ============================================================ */

.cta-section {
  padding: clamp(var(--space-20), 10vw, var(--space-32)) 0;
  background: var(--color-dark);
  position: relative;
  overflow: hidden;
}

.cta-bg-img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.12;
}

.cta-inner {
  position: relative;
  z-index: 1;
  text-align: center;
}

.cta-inner .section-label {
  display: inline-block;
  margin-bottom: var(--space-5);
}

.cta-inner .section-title {
  color: #FFFFFF;
  margin-inline: auto;
  max-width: 20ch;
  margin-bottom: var(--space-5);
}

.cta-inner .section-body {
  color: rgba(255,255,255,0.55);
  margin-inline: auto;
  text-align: center;
  margin-bottom: var(--space-10);
}

.interest-form {
  display: flex;
  gap: var(--space-3);
  max-width: 480px;
  margin-inline: auto;
  flex-wrap: wrap;
}

.interest-form input[type="email"] {
  flex: 1;
  min-width: 220px;
  padding: var(--space-3) var(--space-5);
  border-radius: var(--radius-full);
  border: 1px solid rgba(255,255,255,0.2);
  background: rgba(255,255,255,0.06);
  color: #FFFFFF;
  font-family: var(--font-body);
  font-size: var(--text-sm);
  outline: none;
}

.interest-form input[type="email"]::placeholder {
  color: rgba(255,255,255,0.35);
}

.interest-form input[type="email"]:focus {
  border-color: var(--color-accent);
  background: rgba(255,255,255,0.08);
}

.interest-form button {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: #111010;
  background: var(--color-accent-warm);
  padding: var(--space-3) var(--space-8);
  border-radius: var(--radius-full);
  border: none;
  cursor: pointer;
  white-space: nowrap;
}

.interest-form button:hover {
  background: var(--color-accent);
  color: #FFFFFF;
}

.form-success {
  display: none;
  color: var(--color-accent);
  font-family: var(--font-body);
  font-size: var(--text-base);
  margin-top: var(--space-4);
}

.investor-strip {
  margin-top: var(--space-16);
  padding-top: var(--space-10);
  border-top: 1px solid rgba(255,255,255,0.08);
  text-align: center;
}

.investor-strip p {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  color: rgba(255,255,255,0.4);
  margin-inline: auto;
  margin-bottom: var(--space-4);
}

.investor-contact {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-accent);
  text-decoration: none;
  border: 1px solid rgba(200,134,10,0.3);
  padding: var(--space-2) var(--space-6);
  border-radius: var(--radius-full);
  display: inline-block;
}

.investor-contact:hover {
  background: rgba(200,134,10,0.1);
  border-color: var(--color-accent);
}

/* ============================================================
   FOOTER
   ============================================================ */

.site-footer {
  background: var(--color-dark);
  border-top: 1px solid rgba(255,255,255,0.06);
  padding: var(--space-12) 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-6);
  flex-wrap: wrap;
}

.footer-brand {
  font-family: var(--font-display);
  font-size: var(--text-base);
  color: rgba(255,255,255,0.45);
  letter-spacing: 0.06em;
}

.footer-brand strong {
  color: rgba(255,255,255,0.7);
  font-weight: 400;
}

.footer-legal {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.25);
  max-width: none;
  text-align: center;
}

.footer-patent {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  color: rgba(255,255,255,0.25);
  text-align: right;
  max-width: 30ch;
}

/* ============================================================
   SCROLL REVEAL ANIMATIONS
   ============================================================ */

.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s cubic-bezier(0.16, 1, 0.3, 1), transform 0.65s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }
.reveal-delay-4 { transition-delay: 0.4s; }

/* ============================================================
   RESPONSIVE
   ============================================================ */

@media (max-width: 900px) {
  .nav-links { display: none; }
  .nav-cta { display: none; }
  .nav-hamburger { display: flex; }

  .product-intro-grid { grid-template-columns: 1fr; }
  .product-intro-media { max-height: 420px; }

  .steps-grid { grid-template-columns: 1fr; gap: var(--space-6); }

  .lifestyle-grid { grid-template-columns: 1fr; }
  .lifestyle-card.large { grid-row: span 1; }

  .tech-inner { grid-template-columns: 1fr; }

  .promo-grid { grid-template-columns: 1fr; }

  .footer-inner { flex-direction: column; text-align: center; }
  .footer-patent { text-align: center; max-width: 100%; }
}

@media (max-width: 600px) {
  .hero-headline { font-size: clamp(2.2rem, 8vw, 3.5rem); }
  .hero-actions { flex-direction: column; }
  .btn-primary, .btn-outline { text-align: center; justify-content: center; }
  .tech-specs { grid-template-columns: 1fr 1fr; }
  .interest-form { flex-direction: column; }
  .interest-form input[type="email"] { width: 100%; }
  .interest-form button { width: 100%; text-align: center; justify-content: center; }
}