/* 1. CSS RESET & BASE STYLES */
:root {
  --primary: #051d19;
  --primary-container: #1b322d;
  --secondary: #bb0021;
  --secondary-container: #df2936;
  --surface: #f6fafd;
  --surface-container-low: #f0f4f7;
  --surface-container: #eaeef1;
  --surface-container-high: #e5e9ec;
  --on-surface: #181c1f;
  --on-surface-variant: #424846;
  --outline: #727876;
  --outline-variant: #c2c8c5;
  --on-primary: #ffffff;
  --inverse-surface: #2c3134;
  --tertiary: #111b1a;
  --error: #ba1a1a;
  
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-6: 24px;
  --space-8: 32px;
  --space-12: 48px;
  --space-16: 64px;
  --space-20: 80px;
  --space-24: 96px;
  --space-30: 120px;
  --space-40: 160px;
  
  --container-max: 1400px;
  
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 8px;
  --radius-xl: 12px;
  --radius-2xl: 16px;
  --radius-full: 9999px;
  
  --transition-fast: 150ms ease;
  --transition-normal: 300ms ease;
  --transition-slow: 500ms ease;
  --transition-x-slow: 800ms cubic-bezier(0.16, 1, 0.3, 1);
  
  --shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
  --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
  --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
  --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
  
  --z-nav: 1000;
  --z-overlay: 900;
  --z-modal: 1100;
  --z-toast: 1200;
}

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: 'Inter Tight', sans-serif;
  color: var(--on-surface);
  background-color: var(--surface);
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

::selection {
  background-color: var(--secondary);
  color: white;
}

img, picture, video, canvas, svg {
  display: block;
  max-width: 100%;
}

a {
  text-decoration: none;
  color: inherit;
}

button, input, select, textarea {
  font-family: inherit;
}

/* 3. TYPOGRAPHY CLASSES */
.text-display { font-size: 72px; font-weight: 700; line-height: 1.05; letter-spacing: -0.04em; }
.text-h1 { font-size: 56px; font-weight: 700; line-height: 1.1; letter-spacing: -0.03em; }
.text-h2 { font-size: 44px; font-weight: 700; line-height: 1.15; letter-spacing: -0.03em; }
.text-h3 { font-size: 32px; font-weight: 600; line-height: 1.2; letter-spacing: -0.02em; }
.text-h4 { font-size: 24px; font-weight: 600; line-height: 1.3; letter-spacing: -0.02em; }
.text-body-lg { font-size: 18px; font-weight: 400; line-height: 1.7; letter-spacing: -0.01em; }
.text-body { font-size: 16px; font-weight: 400; line-height: 1.6; }
.text-label { font-size: 14px; font-weight: 700; line-height: 1.2; letter-spacing: 0.05em; text-transform: uppercase; }
.text-caption { font-size: 12px; font-weight: 500; }
.text-mono { font-family: monospace; }
.overline { font-size: 12px; font-weight: 700; letter-spacing: 0.1em; text-transform: uppercase; color: var(--secondary); margin-bottom: var(--space-2); display: block; }

/* 4. UTILITY CLASSES */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.section-padding { padding-block: var(--space-30); }
.text-center { text-align: center; }
.text-left { text-align: left; }
.text-right { text-align: right; }

.d-flex { display: flex; }
.d-grid { display: grid; }
.d-block { display: block; }
.d-none { display: none; }

.align-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.flex-col { flex-direction: column; }
.gap-2 { gap: var(--space-2); }
.gap-4 { gap: var(--space-4); }
.gap-6 { gap: var(--space-6); }
.gap-8 { gap: var(--space-8); }

.sr-only {
  position: absolute; width: 1px; height: 1px; padding: 0; margin: -1px; overflow: hidden; clip: rect(0, 0, 0, 0); white-space: nowrap; border-width: 0;
}

.gradient-text {
  background: linear-gradient(90deg, var(--primary), var(--secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* 5. ANIMATION KEYFRAMES */
@keyframes fadeInUp { from { opacity: 0; transform: translateY(40px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeInDown { from { opacity: 0; transform: translateY(-40px); } to { opacity: 1; transform: translateY(0); } }
@keyframes fadeInLeft { from { opacity: 0; transform: translateX(-40px); } to { opacity: 1; transform: translateX(0); } }
@keyframes fadeInRight { from { opacity: 0; transform: translateX(40px); } to { opacity: 1; transform: translateX(0); } }
@keyframes scaleIn { from { opacity: 0; transform: scale(0.9); } to { opacity: 1; transform: scale(1); } }
@keyframes drawLine { to { stroke-dashoffset: 0; width: 100%; } }
@keyframes shimmer { 0% { background-position: -200% 0; } 100% { background-position: 200% 0; } }
@keyframes float { 0%, 100% { transform: translateY(0); } 50% { transform: translateY(-10px); } }
@keyframes pulse { 0% { transform: scale(1); } 50% { transform: scale(1.05); } 100% { transform: scale(1); } }
@keyframes progressBar { from { width: 0; } to { width: 100%; } }

.reveal, .reveal-left, .reveal-right, .reveal-scale { opacity: 0; transition: all var(--transition-x-slow); }
.reveal { transform: translateY(40px); }
.reveal-left { transform: translateX(-40px); }
.reveal-right { transform: translateX(40px); }
.reveal-scale { transform: scale(0.9); }
.reveal.visible, .reveal-left.visible, .reveal-right.visible, .reveal-scale.visible { opacity: 1; transform: none; }

.delay-1 { transition-delay: 100ms; }
.delay-2 { transition-delay: 200ms; }
.delay-3 { transition-delay: 300ms; }
.delay-4 { transition-delay: 400ms; }
.delay-5 { transition-delay: 500ms; }
.delay-6 { transition-delay: 600ms; }
.delay-7 { transition-delay: 700ms; }
.delay-8 { transition-delay: 800ms; }

/* 6. SCROLL PROGRESS */
#scroll-progress { position: fixed; top: 0; left: 0; height: 3px; background-color: var(--secondary); z-index: 1001; width: 0%; transition: width 0.1s; }

/* 7. NAVBAR */
.navbar { position: fixed; top: 0; left: 0; width: 100%; height: 72px; background: rgba(255, 255, 255, 0.8); backdrop-filter: blur(10px); border-bottom: 1px solid var(--surface-container); z-index: var(--z-nav); transition: all var(--transition-normal); display: flex; align-items: center; }
.navbar.scrolled { background: rgba(255, 255, 255, 0.95); box-shadow: var(--shadow-sm); }
.navbar .container { display: flex; justify-content: space-between; align-items: center; }
.navbar__logo { font-size: 24px; font-weight: 700; color: var(--primary); }
.navbar__links { display: flex; gap: var(--space-8); list-style: none; }
.navbar__link { font-size: 14px; font-weight: 700; letter-spacing: 0.05em; text-transform: uppercase; color: var(--on-surface-variant); transition: color var(--transition-fast); }
.navbar__link:hover, .navbar__link.active { color: var(--secondary); }
.navbar__mobile-toggle { display: none; background: none; border: none; font-size: 24px; cursor: pointer; color: var(--primary); }
.mobile-menu { position: fixed; inset: 0; background: var(--surface); z-index: var(--z-overlay); transform: translateX(100%); transition: transform var(--transition-normal); display: flex; flex-direction: column; padding: var(--space-24) var(--space-6); }
.mobile-menu.active { transform: translateX(0); }
.mobile-menu__links { list-style: none; display: flex; flex-direction: column; gap: var(--space-6); font-size: 24px; }
.mobile-menu__link { font-weight: 700; color: var(--primary); }

/* 8. HERO */
.hero { min-height: 100vh; position: relative; overflow: hidden; display: flex; align-items: center; justify-content: center; }
.hero__bg { position: absolute; inset: 0; background-size: cover; background-position: center; background-attachment: fixed; }
.hero__overlay { position: absolute; inset: 0; background: linear-gradient(to bottom, rgba(5, 29, 25, 0.6), rgba(5, 29, 25, 0.9)); }
.hero__content { relative: relative; z-index: 10; text-align: center; max-width: 900px; padding: var(--space-6); margin-top: 72px; }
.hero__badge { display: inline-block; border: 1px solid var(--secondary); color: var(--secondary); padding: var(--space-2) var(--space-4); border-radius: var(--radius-full); text-transform: uppercase; font-weight: 700; font-size: 12px; margin-bottom: var(--space-6); background: rgba(187,0,33,0.1); backdrop-filter: blur(4px); }
.hero__title { color: var(--on-primary); margin-bottom: var(--space-6); }
.hero__subtitle { color: var(--outline-variant); margin-bottom: var(--space-8); }
.hero__actions { display: flex; gap: var(--space-4); justify-content: center; flex-wrap: wrap; }
.hero__stats { position: absolute; bottom: 0; left: 0; width: 100%; display: flex; justify-content: space-around; padding: var(--space-6); border-top: 1px solid rgba(255,255,255,0.1); background: rgba(5,29,25,0.8); backdrop-filter: blur(10px); z-index: 10; flex-wrap: wrap; }
.hero__stat-item { text-align: center; padding: 0 var(--space-4); }
.hero__stat-number { color: var(--on-primary); font-size: 32px; font-weight: 700; }
.hero__stat-label { color: var(--outline-variant); font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; }
.hero__scroll-indicator { position: absolute; bottom: 100px; left: 50%; transform: translateX(-50%); color: white; animation: float 2s infinite ease-in-out; z-index: 10; }
#glcanvas { position: absolute; inset: 0; width: 100%; height: 100%; pointer-events: none; opacity: 0.4; mix-blend-mode: overlay; }

/* 9. BUTTONS */
.btn { display: inline-flex; align-items: center; justify-content: center; padding: 16px 32px; border-radius: var(--radius-md); font-weight: 700; font-size: 14px; letter-spacing: 0.05em; text-transform: uppercase; cursor: pointer; transition: all var(--transition-normal); border: none; text-align: center; }
.btn--primary { background: var(--secondary); color: white; }
.btn--primary:hover { background: var(--secondary-container); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn--secondary { background: transparent; border: 1px solid var(--on-primary); color: var(--on-primary); }
.btn--secondary:hover { background: rgba(255,255,255,0.1); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn--ghost { background: transparent; color: var(--secondary); padding: 8px 16px; }
.btn--ghost:hover { text-decoration: underline; background: rgba(187,0,33,0.05); }
.btn--dark { background: var(--primary); color: white; }
.btn--dark:hover { background: var(--primary-container); transform: translateY(-2px); box-shadow: var(--shadow-md); }
.btn--icon { gap: var(--space-2); }
.btn--lg { padding: 20px 40px; font-size: 16px; }
.btn--sm { padding: 10px 20px; font-size: 12px; }

/* 10. TRUST METRICS */
.trust-metrics { background: var(--primary); color: white; padding-block: var(--space-20); }
.trust-metrics__grid { display: grid; grid-template-columns: repeat(5, 1fr); gap: var(--space-6); text-align: center; align-items: center; }
.trust-metrics__number { font-size: 48px; font-weight: 700; color: var(--secondary); margin-bottom: var(--space-2); }
.trust-metrics__label { font-size: 12px; text-transform: uppercase; letter-spacing: 0.05em; color: var(--outline-variant); }

/* 11. SECTION HEADERS */
.section-header { text-align: center; max-width: 700px; margin: 0 auto var(--space-20); }
.section-header__title { margin-bottom: var(--space-4); color: var(--primary); }
.section-header__description { color: var(--on-surface-variant); }

/* 12. COMPOSITE EXPLAINER */
.explainer { background: var(--surface); padding-block: var(--space-30); }
.explainer__grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-16); align-items: center; }
.explainer__visual { position: sticky; top: 120px; }
.explainer__layers { position: relative; width: 100%; aspect-ratio: 16/9; }
.explainer__layer { position: absolute; inset: 0; opacity: 0.3; transition: all var(--transition-slow); border-radius: var(--radius-lg); overflow: hidden; }
.explainer__layer img { width: 100%; height: 100%; object-fit: cover; }
.explainer__layer.active { opacity: 1; transform: scale(1.02); z-index: 2; box-shadow: var(--shadow-xl); }
.explainer__content { display: flex; flex-direction: column; gap: var(--space-12); }
.explainer__text-block { cursor: pointer; padding: var(--space-6); border-radius: var(--radius-lg); border: 1px solid transparent; transition: all var(--transition-normal); }
.explainer__text-block.active { background: var(--surface-container-low); border-color: var(--outline-variant); box-shadow: var(--shadow-sm); }
.explainer__text-title { font-size: 24px; font-weight: 600; margin-bottom: var(--space-2); color: var(--primary); }

/* 13. PROBLEM SECTION */
.problem { background: var(--primary); color: white; padding-block: var(--space-30); position: relative; overflow: hidden; }
.problem__bg { position: absolute; inset: 0; opacity: 0.15; object-fit: cover; width: 100%; height: 100%; mix-blend-mode: overlay; }
.problem__header { position: relative; z-index: 2; margin-bottom: var(--space-16); }
.problem__header .section-header__title { color: white; }
.problem__header .section-header__description { color: var(--outline-variant); }
.problem__grid { position: relative; z-index: 2; display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-8); }
.problem__item { background: rgba(255,255,255,0.05); padding: var(--space-8); border-radius: var(--radius-lg); border: 1px solid rgba(255,255,255,0.1); backdrop-filter: blur(10px); }
.problem__icon { width: 48px; height: 48px; color: var(--secondary); margin-bottom: var(--space-4); }
.problem__title { font-size: 20px; font-weight: 600; margin-bottom: var(--space-2); }
.problem__desc { color: var(--outline-variant); font-size: 14px; }

/* 14. COMPARISON / BEFORE-AFTER */
.comparison { background: var(--surface-container-low); padding-block: var(--space-30); }
.comparison__slider { position: relative; width: 100%; aspect-ratio: 21/9; overflow: hidden; border-radius: var(--radius-xl); box-shadow: var(--shadow-xl); margin-bottom: var(--space-12); }
.comparison__slider img { position: absolute; top: 0; left: 0; width: 100%; height: 100%; object-fit: cover; }
.comparison__before { clip-path: inset(0 50% 0 0); }
.comparison__handle { position: absolute; top: 0; bottom: 0; left: 50%; width: 4px; background: white; cursor: ew-resize; transform: translateX(-50%); box-shadow: 0 0 10px rgba(0,0,0,0.5); }
.comparison__handle::after { content: ''; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); width: 40px; height: 40px; background: white; border-radius: 50%; box-shadow: 0 2px 6px rgba(0,0,0,0.3); border: 2px solid var(--primary); }
.comparison__handle::before { content: '↔'; position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%); z-index: 2; color: var(--primary); font-size: 18px; line-height: 1; }
.comparison__metrics { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-8); }
.metric-item { background: white; padding: var(--space-6); border-radius: var(--radius-lg); box-shadow: var(--shadow-sm); }
.metric-title { font-weight: 700; margin-bottom: var(--space-4); font-size: 14px; text-transform: uppercase; }
.metric-bar-container { background: var(--surface-container); height: 8px; border-radius: 4px; margin-bottom: var(--space-2); position: relative; overflow: hidden; }
.metric-bar { height: 100%; border-radius: 4px; background: var(--primary); position: absolute; left: 0; top: 0; }
.metric-bar--better { background: var(--secondary); }
.metric-labels { display: flex; justify-content: space-between; font-size: 12px; color: var(--on-surface-variant); font-weight: 500; }

/* 15. BENEFITS GRID */
.benefits { padding-block: var(--space-30); background: var(--surface); }
.benefits__grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: var(--space-6); grid-auto-rows: minmax(250px, auto); }
.benefit-card { background: white; border-radius: var(--radius-xl); padding: var(--space-6); box-shadow: var(--shadow-sm); border: 1px solid var(--surface-container); transition: all var(--transition-normal); display: flex; flex-direction: column; position: relative; overflow: hidden; }
.benefit-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-lg); border-color: var(--outline-variant); }
.benefit-card--featured { grid-column: span 2; grid-row: span 2; padding: 0; }
.benefit-card--featured .benefit-card__image { height: 50%; object-fit: cover; }
.benefit-card--featured .benefit-card__content { padding: var(--space-8); height: 50%; }
.benefit-card--wide { grid-column: span 2; display: flex; flex-direction: row; }
.benefit-card--wide .benefit-card__image { width: 40%; height: 100%; object-fit: cover; }
.benefit-card--wide .benefit-card__content { width: 60%; padding: var(--space-6); display: flex; flex-direction: column; justify-content: center; }
.benefit-card__icon { width: 48px; height: 48px; background: var(--surface-container-low); border-radius: 50%; display: flex; align-items: center; justify-content: center; color: var(--secondary); margin-bottom: var(--space-4); flex-shrink: 0; }
.benefit-card__metric { font-size: 40px; font-weight: 700; color: var(--primary); margin-bottom: var(--space-2); line-height: 1; }
.benefit-card__title { font-size: 20px; font-weight: 600; margin-bottom: var(--space-2); color: var(--primary); }
.benefit-card__desc { color: var(--on-surface-variant); font-size: 14px; line-height: 1.5; }

/* 16. TIMELINE */
.timeline-section { background: var(--surface-container-low); padding-block: var(--space-30); overflow: hidden; }
.timeline { position: relative; width: 100%; margin-top: var(--space-12); padding-bottom: var(--space-20); }
.timeline__track { position: absolute; top: 40px; left: 0; width: 100%; height: 4px; background: var(--outline-variant); z-index: 1; }
.timeline__progress { position: absolute; top: 40px; left: 0; height: 4px; background: var(--secondary); z-index: 2; transition: width 0.5s ease; width: 0; }
.timeline__steps { display: flex; justify-content: space-between; position: relative; z-index: 3; }
.timeline__step { display: flex; flex-direction: column; align-items: center; cursor: pointer; flex: 1; }
.timeline__dot { width: 24px; height: 24px; background: white; border: 4px solid var(--outline-variant); border-radius: 50%; transition: all var(--transition-normal); margin-top: 30px; margin-bottom: var(--space-4); }
.timeline__step.active .timeline__dot { border-color: var(--secondary); background: var(--secondary); transform: scale(1.2); box-shadow: 0 0 10px rgba(187,0,33,0.3); }
.timeline__step.completed .timeline__dot { border-color: var(--secondary); }
.timeline__label { font-weight: 600; color: var(--on-surface-variant); font-size: 14px; text-transform: uppercase; text-align: center; transition: color var(--transition-fast); }
.timeline__step.active .timeline__label { color: var(--primary); font-weight: 700; }
.timeline__content-wrapper { position: relative; min-height: 400px; margin-top: var(--space-12); }
.timeline__content { position: absolute; inset: 0; opacity: 0; visibility: hidden; transition: all var(--transition-slow); display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-12); align-items: center; transform: translateY(20px); }
.timeline__content.active { opacity: 1; visibility: visible; transform: translateY(0); }
.timeline__image { width: 100%; height: 100%; object-fit: cover; border-radius: var(--radius-xl); box-shadow: var(--shadow-lg); }

/* 17. PRODUCT CARDS */
.products { padding-block: var(--space-30); background: var(--surface); }
.products__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-8); }
.product-card { background: white; border: 1px solid var(--outline-variant); border-radius: var(--radius-xl); overflow: hidden; transition: all var(--transition-normal); display: flex; flex-direction: column; position: relative; }
.product-card:hover { transform: translateY(-10px); box-shadow: var(--shadow-xl); border-color: var(--primary); }
.product-card__image-wrap { position: relative; height: 280px; overflow: hidden; background: var(--surface-container-low); }
.product-card__image { width: 100%; height: 100%; object-fit: cover; transition: transform 0.8s ease; }
.product-card:hover .product-card__image { transform: scale(1.05); }
.product-card__badge { position: absolute; top: var(--space-4); left: var(--space-4); background: var(--surface); color: var(--primary); font-size: 12px; font-weight: 700; padding: 4px 12px; border-radius: var(--radius-md); text-transform: uppercase; letter-spacing: 0.05em; box-shadow: var(--shadow-sm); }
.product-card__body { padding: var(--space-6); flex-grow: 1; display: flex; flex-direction: column; }
.product-card__title { font-size: 28px; font-weight: 700; margin-bottom: var(--space-2); color: var(--primary); }
.product-card__subtitle { font-size: 14px; font-weight: 700; color: var(--secondary); text-transform: uppercase; margin-bottom: var(--space-4); }
.product-card__desc { color: var(--on-surface-variant); font-size: 14px; margin-bottom: var(--space-6); flex-grow: 1; }
.product-card__specs { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); padding-top: var(--space-4); border-top: 1px solid var(--surface-container); margin-bottom: var(--space-6); }
.product-card__spec-label { font-size: 10px; text-transform: uppercase; color: var(--outline); display: block; margin-bottom: 2px; }
.product-card__spec-value { font-family: monospace; font-size: 14px; font-weight: 700; color: var(--primary); }
.product-card--premium { background: var(--primary); color: white; border-color: var(--primary-container); }
.product-card--premium .product-card__title, .product-card--premium .product-card__spec-value { color: white; }
.product-card--premium .product-card__desc { color: var(--outline-variant); }
.product-card--premium .product-card__specs { border-color: rgba(255,255,255,0.1); }
.product-card--premium .product-card__subtitle { color: var(--outline-variant); }
.product-card--premium .product-card__badge { background: var(--secondary); color: white; }
.product-card__actions { margin-top: auto; display: flex; flex-direction: column; gap: var(--space-2); }

/* 18. TECHNICAL DASHBOARD */
.tech-dashboard { background: var(--primary); color: white; padding-block: var(--space-30); border-top: 1px solid var(--primary-container); border-bottom: 1px solid var(--primary-container); }
.tech-dashboard__container { display: grid; grid-template-columns: 300px 1fr; gap: var(--space-8); align-items: start; }
.tech-dashboard__sidebar { background: var(--primary-container); padding: var(--space-4); border-radius: var(--radius-xl); }
.tech-dashboard__tabs { display: flex; flex-direction: column; gap: var(--space-2); margin-bottom: var(--space-8); }
.tech-dashboard__tab { background: transparent; border: none; padding: var(--space-4) var(--space-6); text-align: left; color: var(--outline-variant); font-weight: 700; font-size: 16px; border-radius: var(--radius-lg); cursor: pointer; transition: all var(--transition-fast); display: flex; justify-content: space-between; align-items: center; }
.tech-dashboard__tab:hover { background: rgba(255,255,255,0.05); color: white; }
.tech-dashboard__tab.active { background: white; color: var(--primary); }
.calculator { padding-top: var(--space-6); border-top: 1px solid rgba(255,255,255,0.1); }
.calculator__label { font-size: 12px; text-transform: uppercase; color: var(--outline-variant); margin-bottom: var(--space-2); display: block; font-weight: 700; }
.calculator__input { width: 100%; margin-bottom: var(--space-4); }
.calculator__result { background: rgba(0,0,0,0.2); padding: var(--space-4); border-radius: var(--radius-md); text-align: center; border: 1px solid rgba(255,255,255,0.05); }
.calculator__result-value { font-family: monospace; font-size: 24px; font-weight: 700; color: var(--secondary); }
.tech-dashboard__content { background: white; border-radius: var(--radius-xl); overflow: hidden; color: var(--on-surface); }
.tech-panel { display: none; animation: fadeInRight 0.5s ease; }
.tech-panel.active { display: block; }
.tech-panel__header { background: var(--surface-container-low); padding: var(--space-6); border-bottom: 1px solid var(--outline-variant); display: flex; justify-content: space-between; align-items: center; }
.tech-panel__title { font-size: 20px; font-weight: 700; text-transform: uppercase; letter-spacing: 0.05em; color: var(--primary); }
.tech-table { width: 100%; border-collapse: collapse; text-align: left; }
.tech-table th { padding: var(--space-4); background: var(--surface-container); font-size: 12px; text-transform: uppercase; color: var(--on-surface-variant); font-weight: 700; }
.tech-table td { padding: var(--space-4); border-bottom: 1px solid var(--surface-container); font-family: monospace; font-size: 14px; }
.tech-table tr:hover td { background: var(--surface-bright); }
.tech-table td:first-child { font-weight: 700; color: var(--primary); }

/* 19. APPLICATIONS GRID */
.applications { padding-block: var(--space-30); background: var(--surface); }
.applications__grid { display: grid; grid-template-columns: repeat(4, 1fr); grid-auto-rows: 250px; gap: var(--space-4); }
.app-card { position: relative; border-radius: var(--radius-lg); overflow: hidden; cursor: pointer; }
.app-card--large { grid-column: span 2; grid-row: span 2; }
.app-card--tall { grid-row: span 2; }
.app-card--wide { grid-column: span 2; }
.app-card__image { width: 100%; height: 100%; object-fit: cover; transition: transform 0.8s ease; }
.app-card__overlay { position: absolute; inset: 0; background: linear-gradient(to top, rgba(5,29,25,0.9) 0%, rgba(5,29,25,0) 60%); padding: var(--space-6); display: flex; flex-direction: column; justify-content: flex-end; transition: background 0.3s ease; }
.app-card__title { color: white; font-size: 20px; font-weight: 600; transform: translateY(10px); transition: transform 0.3s ease; }
.app-card:hover .app-card__image { transform: scale(1.1); }
.app-card:hover .app-card__overlay { background: linear-gradient(to top, rgba(187,0,33,0.9) 0%, rgba(5,29,25,0.2) 100%); }
.app-card:hover .app-card__title { transform: translateY(0); }

/* 20. PROJECT SHOWCASE */
.showcase { padding-block: var(--space-30); background: var(--primary); color: white; }
.showcase .section-header__title { color: white; }
.showcase__featured { width: 100%; height: 70vh; position: relative; margin-bottom: var(--space-6); border-radius: var(--radius-xl); overflow: hidden; }
.showcase__featured img { width: 100%; height: 100%; object-fit: cover; }
.showcase__featured-info { position: absolute; bottom: 0; left: 0; width: 100%; padding: var(--space-8); background: linear-gradient(to top, rgba(0,0,0,0.8), transparent); }
.showcase__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.showcase__item { height: 250px; position: relative; border-radius: var(--radius-lg); overflow: hidden; cursor: pointer; }
.showcase__item img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.5s ease; }
.showcase__overlay { position: absolute; inset: 0; background: rgba(5,29,25,0.8); display: flex; flex-direction: column; justify-content: center; align-items: center; opacity: 0; transition: opacity 0.3s ease; padding: var(--space-4); text-align: center; }
.showcase__item:hover img { transform: scale(1.05); }
.showcase__item:hover .showcase__overlay { opacity: 1; }

/* 21. MANUFACTURING */
.manufacturing { background: var(--surface); padding-block: var(--space-30); }
.manufacturing__grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-16); align-items: center; }
.manufacturing__image { border-radius: var(--radius-xl); box-shadow: var(--shadow-xl); overflow: hidden; }
.manufacturing__stats { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-6); margin-top: var(--space-8); }
.m-stat { background: var(--surface-container-low); padding: var(--space-6); border-radius: var(--radius-lg); border-left: 4px solid var(--secondary); }
.m-stat__num { font-size: 32px; font-weight: 700; color: var(--primary); margin-bottom: 4px; }
.m-stat__label { font-size: 12px; text-transform: uppercase; color: var(--on-surface-variant); font-weight: 600; }

/* 22. WHY STEELDECK */
.why { padding-block: var(--space-30); background: var(--surface-container-low); }
.why__grid { display: grid; grid-template-columns: 1fr 1.5fr; gap: var(--space-16); }
.advantages__list { display: flex; flex-direction: column; gap: var(--space-8); }
.advantage-item { display: flex; gap: var(--space-4); }
.advantage-icon { width: 40px; height: 40px; background: var(--primary); color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; flex-shrink: 0; font-size: 20px; }
.advantage-title { font-size: 18px; font-weight: 700; color: var(--primary); margin-bottom: 4px; }
.advantage-desc { color: var(--on-surface-variant); font-size: 14px; }
.comparison-table { background: white; border-radius: var(--radius-xl); overflow: hidden; box-shadow: var(--shadow-lg); width: 100%; border-collapse: collapse; }
.comparison-table th, .comparison-table td { padding: var(--space-4); text-align: center; border-bottom: 1px solid var(--surface-container); }
.comparison-table th:first-child, .comparison-table td:first-child { text-align: left; font-weight: 600; color: var(--on-surface); }
.comparison-table th { background: var(--primary); color: white; font-size: 14px; text-transform: uppercase; }
.comparison-table td.brand-col { background: rgba(187,0,33,0.05); font-weight: 700; color: var(--primary); }
.check-icon { color: var(--secondary); font-weight: bold; }
.cross-icon { color: var(--outline-variant); }

/* 23. CERTIFICATIONS */
.certifications { padding-block: var(--space-20); background: white; border-top: 1px solid var(--surface-container); }
.certifications__grid { display: flex; justify-content: center; gap: var(--space-8); flex-wrap: wrap; }
.cert-badge { display: flex; flex-direction: column; align-items: center; gap: var(--space-2); padding: var(--space-4); border: 1px solid var(--surface-container); border-radius: var(--radius-lg); width: 160px; text-align: center; }
.cert-icon { font-size: 40px; color: var(--outline); }
.cert-title { font-size: 12px; font-weight: 700; color: var(--on-surface-variant); }

/* 24. RESOURCES / DOWNLOADS */
.resources { padding-block: var(--space-30); background: var(--surface); }
.resources__grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: var(--space-6); }
.resource-card { background: white; border: 1px solid var(--surface-container); border-radius: var(--radius-lg); padding: var(--space-6); display: flex; align-items: center; gap: var(--space-4); transition: transform var(--transition-fast), box-shadow var(--transition-fast); }
.resource-card:hover { transform: translateY(-3px); box-shadow: var(--shadow-md); border-color: var(--outline-variant); }
.resource-card__icon { font-size: 32px; color: var(--secondary); background: rgba(187,0,33,0.1); width: 64px; height: 64px; border-radius: var(--radius-md); display: flex; align-items: center; justify-content: center; flex-shrink: 0; }
.resource-card__content { flex-grow: 1; }
.resource-card__title { font-weight: 600; color: var(--primary); font-size: 16px; margin-bottom: 2px; }
.resource-card__meta { font-size: 12px; color: var(--outline-variant); font-family: monospace; }
.resource-card__download { color: var(--primary); padding: var(--space-2); }
.resource-card:hover .resource-card__download { color: var(--secondary); }

/* 25. FAQ */
.faq { padding-block: var(--space-30); background: var(--surface-container-low); }
.faq__container { max-width: 800px; margin: 0 auto; }
.faq__item { background: white; border: 1px solid var(--surface-container); border-radius: var(--radius-lg); margin-bottom: var(--space-4); overflow: hidden; }
.faq__question { padding: var(--space-6); display: flex; justify-content: space-between; align-items: center; cursor: pointer; font-weight: 600; color: var(--primary); font-size: 18px; user-select: none; }
.faq__icon { transition: transform var(--transition-normal); color: var(--secondary); font-size: 24px; }
.faq__question.active .faq__icon { transform: rotate(45deg); }
.faq__answer { max-height: 0; opacity: 0; overflow: hidden; transition: max-height 0.4s ease, opacity 0.4s ease, padding 0.4s ease; background: var(--surface-bright); }
.faq__answer.open { opacity: 1; padding: 0 var(--space-6) var(--space-6) var(--space-6); }
.faq__answer-text { color: var(--on-surface-variant); font-size: 15px; }

/* 26. CONTACT / CTA */
.contact { padding-block: var(--space-30); background: var(--primary); color: white; }
.contact__grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-12); align-items: center; }
.contact__info h2 { color: white; margin-bottom: var(--space-6); }
.contact__info p { color: var(--outline-variant); margin-bottom: var(--space-8); }
.contact-detail { display: flex; align-items: center; gap: var(--space-4); margin-bottom: var(--space-4); }
.contact-detail i { color: var(--secondary); font-size: 24px; }
.contact__form { background: white; padding: var(--space-8); border-radius: var(--radius-xl); color: var(--on-surface); }
.form-group { margin-bottom: var(--space-4); }
.form-label { display: block; font-size: 12px; font-weight: 700; text-transform: uppercase; color: var(--on-surface-variant); margin-bottom: var(--space-2); }
.form-control { width: 100%; padding: 12px 16px; border: 1px solid var(--outline-variant); border-radius: var(--radius-md); font-family: inherit; font-size: 16px; transition: border-color var(--transition-fast); }
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(5,29,25,0.1); }
textarea.form-control { resize: vertical; min-height: 120px; }
.contact-form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: var(--space-4); }
.form-group--full { grid-column: 1 / -1; }
.form-header-text { font-size: 24px; font-weight: 700; color: var(--primary); margin-bottom: 4px; }
.form-subheader-text { font-size: 14px; color: var(--outline); margin-bottom: var(--space-6); }
.contact-list { list-style: none; display: flex; flex-direction: column; gap: var(--space-4); margin-bottom: var(--space-8); }
.contact-list li { display: flex; align-items: flex-start; gap: var(--space-3); color: #b0bec5; font-size: 15px; }
.contact-list li i { color: #4CAF50; font-size: 20px; font-weight: bold; margin-top: 2px; }
@media (max-width: 768px) {
  .contact-form-grid { grid-template-columns: 1fr; }
}

/* 27. FOOTER */
.footer { background: var(--tertiary); color: var(--outline-variant); padding-top: var(--space-20); padding-bottom: var(--space-6); }
.footer__grid { display: grid; grid-template-columns: 2fr 1fr 1fr 1.5fr; gap: var(--space-12); margin-bottom: var(--space-12); }
.footer__logo { font-size: 28px; font-weight: 700; color: white; margin-bottom: var(--space-4); }
.footer__desc { font-size: 14px; margin-bottom: var(--space-6); max-width: 300px; }
.footer__col-title { color: white; font-size: 14px; font-weight: 700; text-transform: uppercase; margin-bottom: var(--space-6); letter-spacing: 0.05em; }
.footer__links { list-style: none; display: flex; flex-direction: column; gap: var(--space-3); }
.footer__link { font-size: 14px; transition: color var(--transition-fast); }
.footer__link:hover { color: var(--secondary); }
.footer__bottom { border-top: 1px solid rgba(255,255,255,0.1); padding-top: var(--space-6); display: flex; justify-content: space-between; align-items: center; font-size: 12px; }

/* 28. FLOATING ELEMENTS */
.whatsapp-btn { position: fixed; bottom: 30px; right: 30px; width: 60px; height: 60px; background-color: #25D366; color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 30px; box-shadow: var(--shadow-lg); z-index: var(--z-toast); transition: transform var(--transition-normal); }
.whatsapp-btn:hover { transform: scale(1.1); }
.call-btn { position: fixed; bottom: 30px; left: 30px; width: 60px; height: 60px; background-color: var(--secondary); color: white; border-radius: 50%; display: flex; align-items: center; justify-content: center; box-shadow: var(--shadow-lg); z-index: var(--z-toast); transition: transform var(--transition-normal); }
.call-btn:hover { transform: scale(1.1); }
.back-to-top { position: fixed; bottom: 100px; right: 35px; width: 50px; height: 50px; background-color: var(--primary); color: white; border: none; border-radius: 50%; display: flex; align-items: center; justify-content: center; cursor: pointer; opacity: 0; visibility: hidden; transition: all var(--transition-normal); z-index: var(--z-nav); box-shadow: var(--shadow-md); }
.back-to-top.visible { opacity: 1; visibility: visible; }
.back-to-top:hover { background-color: var(--secondary); }

.quick-quote-panel { position: fixed; top: 0; right: 0; width: 100%; max-width: 450px; height: 100vh; background: white; z-index: 1200; box-shadow: -5px 0 25px rgba(0,0,0,0.1); transform: translateX(100%); transition: transform 0.4s cubic-bezier(0.16, 1, 0.3, 1); display: flex; flex-direction: column; }
.quick-quote-panel.open { transform: translateX(0); }
.qq-header { padding: var(--space-6); background: var(--primary); color: white; display: flex; justify-content: space-between; align-items: center; }
.qq-close { background: none; border: none; color: white; font-size: 24px; cursor: pointer; }
.qq-body { padding: var(--space-6); overflow-y: auto; flex-grow: 1; }
.qq-overlay { position: fixed; inset: 0; background: rgba(0,0,0,0.5); z-index: 1199; opacity: 0; visibility: hidden; transition: all 0.3s ease; }
.qq-overlay.active { opacity: 1; visibility: visible; }

/* 29. LIGHTBOX */
.lightbox { position: fixed; inset: 0; background: rgba(0,0,0,0.9); z-index: 1300; display: flex; align-items: center; justify-content: center; opacity: 0; visibility: hidden; transition: all 0.3s ease; }
.lightbox.active { opacity: 1; visibility: visible; }
.lightbox__img { max-width: 90vw; max-height: 90vh; object-fit: contain; }
.lightbox__close { position: absolute; top: 20px; right: 30px; background: none; border: none; color: white; font-size: 40px; cursor: pointer; }

/* 30. RESPONSIVE MEDIA QUERIES */
@media (max-width: 1200px) {
  .benefits__grid { grid-template-columns: repeat(3, 1fr); }
  .applications__grid { grid-template-columns: repeat(3, 1fr); }
}

@media (max-width: 1024px) {
  .text-display { font-size: 56px; }
  .text-h1 { font-size: 44px; }
  .text-h2 { font-size: 36px; }
  .text-h3 { font-size: 28px; }
  
  .trust-metrics__grid { grid-template-columns: repeat(3, 1fr); }
  .explainer__grid { grid-template-columns: 1fr; }
  .explainer__visual { position: relative; top: 0; }
  .problem__grid { grid-template-columns: repeat(2, 1fr); }
  
  .timeline__track, .timeline__progress { display: none; }
  .timeline__steps { flex-direction: column; align-items: flex-start; gap: var(--space-6); padding-left: 20px; border-left: 2px solid var(--outline-variant); }
  .timeline__step { flex-direction: row; text-align: left; gap: var(--space-4); width: 100%; }
  .timeline__dot { margin: 0; transform: translateX(-33px); }
  .timeline__step.active .timeline__dot { transform: translateX(-33px) scale(1.2); }
  .timeline__content { position: relative; opacity: 1; visibility: visible; transform: none; display: none; margin-top: var(--space-4); padding-left: 30px; }
  .timeline__step.active + .timeline__content, .timeline__step.active .timeline__content { display: grid; }
  
  .products__grid { grid-template-columns: repeat(2, 1fr); }
  .tech-dashboard__container { grid-template-columns: 1fr; }
  .tech-dashboard__tabs { flex-direction: row; overflow-x: auto; padding-bottom: 10px; }
  
  .showcase__grid { grid-template-columns: repeat(2, 1fr); }
  .manufacturing__grid { grid-template-columns: 1fr; }
  .why__grid { grid-template-columns: 1fr; }
  .resources__grid { grid-template-columns: repeat(2, 1fr); }
  .contact__grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .section-padding { padding-block: var(--space-20); }
  .navbar__links { display: none; }
  .navbar__mobile-toggle { display: block; }
  .navbar .btn { display: none; }
  
  .hero__title { font-size: 40px; }
  .hero__stats { position: relative; border-top: none; padding: var(--space-4) 0; }
  .hero__content { margin-top: 0; }
  
  .trust-metrics__grid { grid-template-columns: repeat(2, 1fr); }
  .problem__grid { grid-template-columns: 1fr; }
  .comparison__metrics { grid-template-columns: 1fr; }
  
  .benefits__grid { grid-template-columns: 1fr; }
  .benefit-card--featured { grid-column: span 1; grid-row: span 1; flex-direction: column; }
  .benefit-card--featured .benefit-card__image { height: 200px; }
  .benefit-card--wide { grid-column: span 1; flex-direction: column; }
  .benefit-card--wide .benefit-card__image { width: 100%; height: 200px; }
  .benefit-card--wide .benefit-card__content { width: 100%; }
  
  .products__grid { grid-template-columns: 1fr; }
  .applications__grid { grid-template-columns: 1fr; }
  .app-card--large, .app-card--wide { grid-column: span 1; grid-row: span 1; }
  .showcase__grid { grid-template-columns: 1fr; }
  .resources__grid { grid-template-columns: 1fr; }
  .footer__grid { grid-template-columns: 1fr; gap: var(--space-8); }
  .footer__bottom { flex-direction: column; gap: var(--space-4); text-align: center; }
  
  .tech-table th, .tech-table td { padding: var(--space-2); font-size: 12px; }
  .btn { width: 100%; }
}

@media (max-width: 480px) {
  .text-display { font-size: 32px; }
  .text-h1 { font-size: 28px; }
  .text-h2 { font-size: 24px; }
  .trust-metrics__grid { grid-template-columns: 1fr; }
  .manufacturing__stats { grid-template-columns: 1fr; }
  .certifications__grid { flex-direction: column; align-items: center; }
}