/* ==========================================================================
   ILLUSTRAR PRODUTORA DE VÍDEO - DESIGN SYSTEM & STYLESHEET
   Refactored for 100% Pure Black (#000000) & Sand.black Editorial Styling
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800;900&family=Plus+Jakarta+Sans:wght@300;400;500;600;700;800&family=Syne:wght@700;800&display=swap');

/* Neue Machina Custom Display Fonts */
@font-face {
  font-family: 'Neue Machina';
  src: url('assets/fonts/NeueMachina-Ultrabold.woff2') format('woff2'),
       url('assets/fonts/NeueMachina-Ultrabold.woff') format('woff'),
       url('assets/fonts/NeueMachina-Ultrabold.otf') format('opentype');
  font-weight: 700 800 900;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Neue Machina';
  src: url('assets/fonts/NeueMachina-Regular.woff2') format('woff2'),
       url('assets/fonts/NeueMachina-Regular.woff') format('woff'),
       url('assets/fonts/NeueMachina-Regular.otf') format('opentype');
  font-weight: 400 500 600;
  font-style: normal;
  font-display: swap;
}

@font-face {
  font-family: 'Neue Machina';
  src: url('assets/fonts/NeueMachina-Light.woff2') format('woff2'),
       url('assets/fonts/NeueMachina-Light.woff') format('woff'),
       url('assets/fonts/NeueMachina-Light.otf') format('opentype');
  font-weight: 300;
  font-style: normal;
  font-display: swap;
}

:root {
  /* Color Tokens */
  --bg-primary: #000000;
  --bg-secondary: #000000;
  --surface-card: #141414;
  --surface-card-hover: #1f1f1f;
  --surface-glass: rgba(20, 20, 20, 0.85);
  --surface-glass-border: rgba(255, 255, 255, 0.1);

  --accent-red: #d31b2b;
  --accent-red-hover: #eb2133;
  --accent-red-glow: rgba(211, 27, 43, 0.4);
  --accent-red-subtle: rgba(211, 27, 43, 0.15);

  --text-white: #ffffff;
  --text-main: #f1f5f9;
  --text-muted: #a1a1aa;
  --text-subtle: #71717a;

  /* Typography */
  --font-heading: 'Neue Machina', 'Outfit', sans-serif;
  --font-display: 'Neue Machina', 'Outfit', sans-serif;
  --font-body: 'Plus Jakarta Sans', sans-serif;

  /* Spacing & Structure */
  --container-width: 1280px;
  --header-height: 84px;
  --radius-sm: 0px;
  --radius-md: 0px;
  --radius-lg: 0px;

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-normal: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  background-color: #000000;
}

body {
  font-family: var(--font-body);
  background-color: #000000;
  color: var(--text-main);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img, video, svg,
.hero-image-wrapper,
.statement-image-block,
.about-image-card,
.sand-process-banner-wrap,
.portfolio-card,
.contact-image-card,
.modal-content,
.service-card,
.pillar-item,
.contact-card,
.contact-form-container,
.form-input, .form-select, .form-textarea {
  border-radius: 0 !important;
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-fast);
}

button {
  cursor: pointer;
  border: none;
  background: none;
  font-family: inherit;
}

/* Container Utility */
.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 28px;
}

/* Section Common Styles */
.section {
  padding: 110px 0;
  position: relative;
  background-color: #000000;
}

.section-title-wrap {
  text-align: left;
  max-width: 900px;
  margin-bottom: 60px;
}

.section-title-wrap.center {
  text-align: center;
  margin-left: auto;
  margin-right: auto;
}

.section-title {
  font-family: var(--font-heading);
  font-size: 3rem;
  font-weight: 900;
  line-height: 1.15;
  color: var(--text-white);
  text-transform: uppercase;
  letter-spacing: -0.5px;
  margin-bottom: 16px;
  -webkit-text-stroke: 0.6px currentColor;
}

.section-title span {
  color: var(--text-white);
}

.section-subtitle {
  font-size: 1.2rem;
  color: var(--text-muted);
  font-weight: 400;
}

/* Underline decoration (Sand style) */
.underline-accent {
  position: relative;
  display: inline-block;
  border: none;
  border-bottom: none;
  padding-bottom: 2px;
}

/* Completely remove badge-tag as requested */
.badge-tag {
  display: none !important;
}

/* Buttons System (motion-button.tsx Expanding Circle Design System) */
.motion-btn,
.btn,
.btn-service-action {
  position: relative !important;
  display: inline-flex !important;
  align-items: center !important;
  justify-content: flex-start !important;
  height: 50px !important;
  padding: 4px 28px 4px 50px !important;
  border-radius: 999px !important;
  background: rgba(255, 255, 255, 0.05) !important;
  border: 1px solid rgba(255, 255, 255, 0.16) !important;
  color: #ffffff !important;
  font-family: var(--font-body) !important;
  font-size: 0.95rem !important;
  font-weight: 600 !important;
  letter-spacing: -0.2px !important;
  cursor: pointer !important;
  overflow: hidden !important;
  text-decoration: none !important;
  transition: border-color 0.4s ease, box-shadow 0.4s ease, transform 0.3s ease !important;
  user-select: none !important;
  box-shadow: none !important;
}

/* Expanding Circle background shape inside button */
.motion-btn::before,
.btn::before,
.btn-service-action::before {
  content: '' !important;
  position: absolute !important;
  top: 4px !important;
  left: 4px !important;
  width: 40px !important;
  height: 40px !important;
  border-radius: 999px !important;
  background: var(--accent-red) !important;
  transition: width 0.5s cubic-bezier(0.16, 1, 0.3, 1), background 0.4s ease !important;
  z-index: 1 !important;
}

/* Hover expansion: The circle smoothly expands to fill 100% width */
.motion-btn:hover::before,
.btn:hover::before,
.btn-service-action:hover::before {
  width: calc(100% - 8px) !important;
  background: var(--accent-red) !important;
}

.motion-btn:hover,
.btn:hover,
.btn-service-action:hover {
  border-color: var(--accent-red) !important;
  color: #ffffff !important;
  box-shadow: 0 0 20px rgba(211, 27, 43, 0.35) !important;
}

/* Icon positioning inside expanding circle */
.motion-btn-icon,
.btn i,
.btn-service-action i {
  position: absolute !important;
  left: 16px !important;
  top: 50% !important;
  transform: translateY(-50%) !important;
  z-index: 2 !important;
  color: #ffffff !important;
  font-size: 0.95rem !important;
  transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1) !important;
}

.motion-btn:hover .motion-btn-icon,
.btn:hover i,
.btn-service-action:hover i {
  transform: translate(4px, -50%) !important;
}

/* Text label element */
.motion-btn-text,
.btn-text {
  position: relative !important;
  z-index: 2 !important;
  color: #ffffff !important;
  transition: color 0.4s ease !important;
  white-space: nowrap !important;
}

/* Navbar / Header */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  background: #000000;
  transition: var(--transition-normal);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}

.header.scrolled {
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.8);
}

.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.nav-cta {
  height: 42px;
  padding: 0 24px;
  font-size: 0.88rem;
  display: inline-flex;
  align-items: center;
  justify-content: center;
}

.logo-link {
  display: flex;
  align-items: center;
}

.logo-img {
  height: 44px;
  width: auto;
  object-fit: contain;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
  list-style: none;
}

.nav-link {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--text-muted);
  position: relative;
  padding: 8px 0;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background-color: var(--accent-red);
  transition: var(--transition-normal);
}

.nav-link:hover {
  color: var(--text-white);
}

.nav-link:hover::after {
  width: 100%;
}

.mobile-menu-toggle {
  display: none;
  font-size: 1.75rem;
  color: var(--text-white);
}

/* Hero Section (Centered Layout & Background Video Ready) */
.hero {
  min-height: 85vh;
  padding-top: 80px;
  padding-bottom: 100px;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  background-color: #000000;
  overflow: hidden;
}

/* Background Overlay for Future Video */
.hero-video-bg {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.35;
  pointer-events: none;
  z-index: 0;
}

.hero-content {
  position: relative;
  z-index: 2;
  text-align: center;
  max-width: 1160px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
}

.hero-logo-anim {
  height: 230px;
  max-width: 90%;
  width: auto;
  object-fit: contain;
  margin-bottom: 28px;
  filter: none;
  transition: transform 0.3s ease;
}

.hero-logo-anim:hover {
  transform: scale(1.04);
}

.hero-headline {
  font-family: var(--font-heading);
  font-size: 3.4rem;
  font-weight: 900;
  line-height: 1.15;
  color: var(--text-white);
  text-transform: uppercase;
  margin-bottom: 24px;
  letter-spacing: -0.5px;
  text-align: center;
  width: 100%;
  -webkit-text-stroke: 0.6px currentColor;
}

.hero-headline .hero-line {
  display: block;
  white-space: nowrap;
}

.hero-headline span.highlight {
  color: var(--text-white);
}

.hero-description {
  font-size: 1.25rem;
  color: var(--text-muted);
  margin-bottom: 40px;
  max-width: 900px;
  line-height: 1.6;
  text-align: center;
  width: 100%;
}

.hero-description .hero-subline {
  display: block;
  white-space: nowrap;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  flex-wrap: wrap;
}

/* Underline decoration with scroll-driven progress (1px thin line) */
.underline-accent {
  position: relative;
  display: inline-block;
  color: #ffffff;
  padding-bottom: 2px;
  border: none !important;
  border-bottom: none !important;
}

.underline-accent::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: var(--underline-progress, 0%);
  height: 1px;
  background-color: var(--accent-red);
  box-shadow: 0 0 6px var(--accent-red-glow);
  transition: width 0.05s linear;
}

/* Completely remove badge-tag as requested */
.badge-tag {
  display: none !important;
}

/* Editorial Statement Section (Sand.black Overlap & Animated Lines) */
.editorial-statement {
  background-color: #000000;
  padding: 140px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  position: relative;
  overflow: hidden;
}

.statement-grid {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  align-items: center;
  position: relative;
}

.statement-text-block {
  font-family: var(--font-body);
  font-size: 1.65rem;
  font-weight: 500;
  line-height: 1.55;
  color: var(--text-white);
  position: relative;
  z-index: 5;
  -webkit-text-stroke: 0;
}

.statement-text-block p {
  margin-bottom: 0;
}

/* Staggered Word Reveal Animation (TextEffect Component Spec) */
.text-effect-word {
  display: inline-block;
  opacity: 0;
  transform: translateY(16px);
  filter: blur(8px);
  transition: opacity 0.5s cubic-bezier(0.16, 1, 0.3, 1), 
              transform 0.5s cubic-bezier(0.16, 1, 0.3, 1), 
              filter 0.5s cubic-bezier(0.16, 1, 0.3, 1);
  will-change: opacity, transform, filter;
  white-space: pre;
}

.statement-text-block.active .text-effect-word,
.parallax-card.active .text-effect-word {
  opacity: 1;
  transform: translateY(0);
  filter: blur(0px);
}

.statement-image-block {
  position: relative;
  z-index: 1;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.95);
}

.statement-image-block img {
  width: 100%;
  height: 540px;
  object-fit: cover;
  filter: brightness(0.8) contrast(1.05);
}

/* About Section */
.about {
  background-color: #000000;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-image-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  background: #111111;
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.about-image-card img {
  width: 100%;
  height: auto;
  object-fit: cover;
}

.about-founder-tag {
  position: absolute;
  bottom: 0;
  left: 0;
  width: 100%;
  padding: 24px;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.95), transparent);
}

.about-founder-tag h4 {
  font-size: 1.25rem;
  color: var(--text-white);
  font-weight: 800;
}

.about-founder-tag p {
  font-size: 0.9rem;
  color: var(--accent-red);
  font-weight: 600;
}

.about-text {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 24px;
  line-height: 1.7;
}

.pillars-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
  margin-top: 36px;
}

.pillar-item {
  background: #121212;
  border: 1px solid rgba(255, 255, 255, 0.08);
  padding: 24px;
  border-radius: var(--radius-md);
  transition: var(--transition-normal);
}

.pillar-item:hover {
  border-color: var(--accent-red);
  transform: translateY(-4px);
  background: #1a1a1a;
}

.pillar-icon {
  width: 40px;
  height: 40px;
  background: var(--accent-red-subtle);
  color: var(--accent-red);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  margin-bottom: 14px;
}

.pillar-item h4 {
  font-size: 1.1rem;
  color: var(--text-white);
  font-weight: 700;
  margin-bottom: 6px;
}

.pillar-item p {
  font-size: 0.88rem;
  color: var(--text-muted);
}

/* Numbered Services Stack (Sand.black Reference Style) */
.sand-services-list {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
  padding: 24px 0;
}

.sand-services-list {
  display: flex;
  flex-direction: column;
  gap: 0;
  max-width: 920px;
  margin: 0 auto;
}

.sand-service-item {
  background: transparent;
  border: none;
  border-bottom: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: 0;
  overflow: hidden;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  cursor: pointer;
  width: 100%;
}

.sand-service-item:hover {
  border-color: rgba(255, 255, 255, 0.25);
  background: transparent;
}

.sand-service-item.expanded {
  border-color: transparent;
  border-bottom: 1px solid rgba(255, 255, 255, 0.3);
  background: transparent;
  box-shadow: none;
}

.sand-service-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 22px 0;
  gap: 20px;
  user-select: none;
}

.sand-service-header-left {
  display: flex;
  align-items: center;
  gap: 20px;
}

.sand-service-num {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-style: italic;
  color: var(--accent-red);
  font-weight: 700;
  min-width: 32px;
}

.sand-service-name {
  font-family: var(--font-heading);
  font-size: 1.85rem;
  font-weight: 900;
  color: var(--text-white);
  text-transform: uppercase;
  letter-spacing: -0.5px;
  -webkit-text-stroke: 0.4px currentColor;
  margin: 0;
  text-align: left;
  transition: var(--transition-fast);
}

.sand-service-item:hover .sand-service-name {
  color: var(--text-white);
}

.sand-service-toggle {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.06);
  border: 1px solid rgba(255, 255, 255, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-white);
  font-size: 0.95rem;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  flex-shrink: 0;
}

.sand-service-item:hover .sand-service-toggle {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.25);
  color: #ffffff;
}

.sand-service-item.expanded .sand-service-toggle {
  transform: rotate(180deg);
  background: var(--accent-red);
  border-color: var(--accent-red);
  color: #ffffff;
  box-shadow: none;
}

/* Expandable Drawer */
.sand-service-drawer {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.45s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.35s ease;
  opacity: 0;
}

.sand-service-item.expanded .sand-service-drawer {
  max-height: 900px;
  opacity: 1;
}

.sand-service-drawer-inner {
  padding: 0 0 28px 0;
  border-top: none;
  margin-top: 0;
  padding-top: 10px;
}

.sand-service-desc {
  font-size: 1.05rem;
  line-height: 1.7;
  color: var(--text-main);
  margin-bottom: 24px;
}

.sand-service-desc strong {
  color: var(--text-white);
}

/* Video embed container for Cursos Online */
.video-embed-container {
  position: relative;
  width: 100%;
  padding-bottom: 56.25%; /* 16:9 Aspect Ratio */
  height: 0;
  border-radius: 8px;
  overflow: hidden;
  margin-bottom: 22px;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 12px 30px rgba(0, 0, 0, 0.85);
}

.video-embed-container iframe {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
}

/* Action Buttons */
.sand-service-actions {
  display: flex;
  align-items: center;
  gap: 16px;
  flex-wrap: wrap;
}

.btn-service-action {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 13px 26px;
  border-radius: 6px;
  font-size: 0.95rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.5px;
  cursor: pointer;
  transition: all 0.25s ease;
  text-decoration: none;
  border: none;
}

.btn-service-action.primary {
  background: var(--accent-red);
  color: #ffffff;
  box-shadow: none;
}

.btn-service-action.primary:hover {
  background: var(--accent-red-hover);
  transform: translateY(-2px);
  box-shadow: none;
}

.btn-service-action.secondary {
  background: rgba(255, 255, 255, 0.08);
  color: #ffffff;
  border: 1px solid rgba(255, 255, 255, 0.18);
}

.btn-service-action.secondary:hover {
  background: rgba(255, 255, 255, 0.18);
  border-color: rgba(255, 255, 255, 0.35);
  transform: translateY(-2px);
}

/* Standard Services Cards Grid */
.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
  margin-top: 40px;
}

.service-card {
  background: #111111;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 36px 28px;
  transition: var(--transition-normal);
  position: relative;
  display: flex;
  flex-direction: column;
  height: 100%;
}

.service-card:hover {
  transform: translateY(-8px);
  border-color: var(--accent-red);
  background: #181818;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.9), 0 0 20px var(--accent-red-subtle);
}

.service-icon-box {
  width: 56px;
  height: 56px;
  background: var(--accent-red-subtle);
  border: 1px solid rgba(211, 27, 43, 0.3);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-red);
  font-size: 1.5rem;
  margin-bottom: 24px;
}

.service-title {
  font-family: var(--font-heading);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text-white);
  margin-bottom: 12px;
}

.service-desc {
  font-size: 0.95rem;
  color: var(--text-muted);
  flex-grow: 1;
  margin-bottom: 24px;
}

.service-link {
  font-size: 0.9rem;
  font-weight: 700;
  color: var(--accent-red);
  display: flex;
  align-items: center;
  gap: 8px;
}

/* Process Section (Sand.black Reference Style) */
.process {
  background-color: #000000;
  padding: 100px 0 60px 0;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.sand-process-banner-wrap {
  position: relative;
  width: 100%;
  height: 400px;
  border-radius: var(--radius-md);
  overflow: hidden;
  margin-bottom: 60px;
  border: 1px solid rgba(255, 255, 255, 0.1);
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
}

.sand-process-banner-wrap img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.65) contrast(1.1);
}

.sand-process-banner-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.8) 0%, transparent 60%);
  display: flex;
  align-items: flex-end;
  padding: 40px;
}

.sand-process-banner-overlay h3 {
  font-family: var(--font-heading);
  font-size: 2.25rem;
  font-weight: 900;
  color: var(--text-white);
  text-transform: uppercase;
  letter-spacing: 2px;
}

.sand-process-grid {
  display: grid;
  grid-template-columns: repeat(5, 1fr);
  gap: 24px;
  margin-bottom: 50px;
}

.sand-process-item {
  border-right: 1px solid rgba(255, 255, 255, 0.12);
  padding-right: 20px;
}

.sand-process-item:last-child {
  border-right: none;
  padding-right: 0;
}

.sand-process-num {
  font-family: var(--font-heading);
  font-size: 0.95rem;
  color: var(--accent-red);
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 6px;
  margin-bottom: 12px;
}

.sand-process-title {
  font-family: var(--font-heading);
  font-size: 1.18rem;
  font-weight: 900;
  color: var(--accent-red);
  text-transform: uppercase;
  margin-bottom: 10px;
  letter-spacing: -0.3px;
  -webkit-text-stroke: 0.3px currentColor;
  transition: color 0.3s ease;
  cursor: pointer;
}

.sand-process-item:hover .sand-process-title,
.sand-process-title:hover {
  color: var(--text-white);
}

.sand-process-desc {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.5;
}

/* Portfolio Section */
.portfolio {
  background-color: #000000;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.portfolio-filter {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.filter-btn {
  padding: 12px 28px;
  border-radius: 99px;
  background: #141414;
  color: var(--text-muted);
  font-size: 0.9rem;
  font-weight: 600;
  border: 1px solid rgba(255, 255, 255, 0.1);
  transition: var(--transition-fast);
}

.filter-btn:hover, .filter-btn.active {
  background: var(--accent-red);
  color: var(--text-white);
  border-color: var(--accent-red);
  box-shadow: none;
}

/* Portfolio Category Explanatory Header Box & Line Dissolve Animation */
.portfolio-category-intro {
  max-width: 920px;
  margin: 0 auto 40px auto;
  padding: 24px 32px;
  background: rgba(255, 255, 255, 0.02);
  border-left: 3px solid var(--accent-red);
  border-top: 1px solid rgba(255, 255, 255, 0.05);
  border-right: 1px solid rgba(255, 255, 255, 0.05);
  border-bottom: 1px solid rgba(255, 255, 255, 0.05);
  transition: opacity 0.35s ease, transform 0.35s ease;
  text-align: left;
  display: none;
  opacity: 0;
}

.portfolio-category-intro p {
  font-size: 1.08rem;
  color: var(--text-main);
  line-height: 1.7;
  margin: 0;
  font-weight: 400;
}

@keyframes lineDissolve {
  0% {
    opacity: 0;
    transform: translateY(12px);
    filter: blur(4px);
  }
  100% {
    opacity: 1;
    transform: translateY(0);
    filter: blur(0);
  }
}

.portfolio-category-intro span.intro-line {
  display: block;
  opacity: 0;
  animation: lineDissolve 0.7s cubic-bezier(0.16, 1, 0.3, 1) forwards;
  margin-bottom: 6px;
}

.portfolio-category-intro span.intro-line:last-child {
  margin-bottom: 0;
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
  gap: 28px;
}

.portfolio-card {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: #111111;
  border: 1px solid rgba(255, 255, 255, 0.08);
  cursor: pointer;
}

.portfolio-img {
  width: 100%;
  height: 270px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.portfolio-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.95), rgba(0, 0, 0, 0.3));
  opacity: 0;
  padding: 28px;
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  transition: var(--transition-normal);
}

.portfolio-card:hover .portfolio-img {
  transform: scale(1.06);
}

.portfolio-card:hover .portfolio-overlay {
  opacity: 1;
}

.portfolio-tag {
  font-size: 0.75rem;
  font-weight: 700;
  text-transform: uppercase;
  color: var(--accent-red);
  letter-spacing: 1px;
  margin-bottom: 6px;
}

.portfolio-title {
  font-size: 1.25rem;
  font-weight: 800;
  color: var(--text-white);
  margin-bottom: 6px;
}

.portfolio-desc {
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* Clients Section (Sand.black Reference Marquee Style) */
.clients {
  background-color: #000000;
  padding: 100px 0 60px 0;
  position: relative;
  overflow: hidden;
}

.clients-headline {
  font-family: var(--font-heading);
  font-size: 2.75rem;
  font-weight: 800;
  color: var(--text-white);
  line-height: 1.2;
  text-align: left;
  max-width: 800px;
  margin-bottom: 50px;
  letter-spacing: -0.5px;
}

.marquee-wrapper {
  width: 100vw;
  position: relative;
  left: 50%;
  right: 50%;
  margin-left: -50vw;
  margin-right: -50vw;
  overflow: hidden;
  padding: 30px 0 60px 0;
}

.marquee-track {
  display: flex;
  align-items: center;
  gap: 50px;
  width: max-content;
  animation: marquee-scroll 50s linear infinite;
}

.marquee-track:hover {
  animation-play-state: paused;
}

.marquee-logo-item {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 52px;
  padding: 0 12px;
  flex-shrink: 0;
}

.marquee-logo-item img {
  max-height: 42px;
  max-width: 145px;
  width: auto;
  height: auto;
  object-fit: contain;
  filter: brightness(0) invert(1);
  opacity: 0.85;
  transition: all 0.3s ease;
  image-rendering: -webkit-optimize-contrast;
}

.marquee-logo-item img.logo-vertical {
  max-height: 62px;
  max-width: 175px;
  transform: scale(1.3);
}

.marquee-logo-item img:hover {
  filter: brightness(0) invert(1);
  opacity: 1;
  transform: scale(1.08);
}

.marquee-logo-item img.logo-vertical:hover {
  filter: brightness(0) invert(1);
  opacity: 1;
  transform: scale(1.42);
}

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

.clients-divider {
  width: 100%;
  border: none;
  border-top: 1px solid rgba(255, 255, 255, 0.15);
  margin-top: 50px;
}

/* Contact Section */
.contact {
  background-color: #000000;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 60px;
  align-items: stretch;
}

.contact-image-card {
  border-radius: 0 !important;
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.12);
  margin-bottom: 0;
  height: 100%;
  min-height: 480px;
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.8);
}

.contact-image-card img {
  width: 100%;
  height: 100%;
  min-height: 480px;
  object-fit: cover;
  transition: transform 0.5s ease;
}

.contact-image-card:hover img {
  transform: scale(1.04);
}

.contact-card {
  display: flex;
  align-items: center;
  gap: 20px;
  padding: 24px;
  background: #111111;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  transition: var(--transition-fast);
}

.contact-card:hover {
  border-color: var(--accent-red);
  background: #181818;
}

.contact-icon {
  width: 48px;
  height: 48px;
  background: var(--accent-red-subtle);
  color: var(--accent-red);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.25rem;
  flex-shrink: 0;
}

.contact-details h4 {
  font-size: 1rem;
  color: var(--text-white);
  font-weight: 700;
}

.contact-details p {
  font-size: 0.9rem;
  color: var(--text-muted);
}

.contact-form-container {
  background: #111111;
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: 40px;
  box-shadow: 0 20px 50px rgba(0, 0, 0, 0.8);
}

.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 8px;
}

.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 14px 18px;
  background: #000000;
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-sm);
  color: var(--text-white);
  font-family: inherit;
  font-size: 0.95rem;
  transition: var(--transition-fast);
}

.form-select {
  appearance: none;
  -webkit-appearance: none;
  -moz-appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23ff1e27' stroke-width='2.5' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 18px center;
  background-size: 16px 16px;
  padding-right: 48px;
  cursor: pointer;
}

.form-select option {
  background: #141414;
  color: #ffffff;
  padding: 12px;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
  outline: none;
  border-color: var(--accent-red);
  box-shadow: 0 0 12px var(--accent-red-subtle);
}

.form-textarea {
  resize: vertical;
  min-height: 120px;
}

/* Footer */
.footer {
  background: #000000;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 60px 0 30px 0;
}

.footer-top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
  margin-bottom: 30px;
  flex-wrap: wrap;
  gap: 24px;
}

.social-links {
  display: flex;
  align-items: center;
  gap: 16px;
}

.footer-logo-img {
  height: 31px;
  width: auto;
  object-fit: contain;
}

.social-icon {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: #141414;
  color: var(--text-main);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  transition: var(--transition-fast);
}

.social-icon svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
  transition: var(--transition-fast);
}

.social-icon-img {
  width: 20px;
  height: 20px;
  object-fit: contain;
  transition: var(--transition-fast);
}

.social-icon:hover {
  background: var(--accent-red);
  color: var(--text-white);
  transform: translateY(-3px);
}

.footer-bottom {
  text-align: center;
  font-size: 0.85rem;
  color: var(--text-subtle);
}

/* Floating WhatsApp Button (Discrete Outline & Fill on Hover) */
.whatsapp-float {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 56px;
  height: 56px;
  background-color: rgba(0, 0, 0, 0.6);
  color: #25D366;
  border: 1px solid rgba(37, 211, 102, 0.8);
  backdrop-filter: blur(8px);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.75rem;
  box-shadow: none;
  z-index: 999;
  transition: var(--transition-normal);
}

.whatsapp-float:hover {
  background-color: #25D366;
  color: #ffffff;
  border-color: #25D366;
  transform: scale(1.1);
  box-shadow: 0 8px 24px rgba(37, 211, 102, 0.4);
}

@keyframes pulse-green {
  0% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0.7); }
  70% { box-shadow: 0 0 0 18px rgba(37, 211, 102, 0); }
  100% { box-shadow: 0 0 0 0 rgba(37, 211, 102, 0); }
}

/* Lightbox Modal */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.95);
  backdrop-filter: blur(10px);
  z-index: 2000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 24px;
  opacity: 0;
  pointer-events: none;
  transition: var(--transition-fast);
}

.modal-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.modal-content {
  max-width: 900px;
  width: 100%;
  background: #111111;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid rgba(255, 255, 255, 0.1);
  position: relative;
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.9);
}

.modal-close {
  position: absolute;
  top: 16px;
  right: 16px;
  width: 36px;
  height: 36px;
  background: rgba(0, 0, 0, 0.7);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  z-index: 10;
}

.modal-img {
  width: 100%;
  max-height: 60vh;
  object-fit: cover;
}

.modal-body {
  padding: 24px;
}

/* Scroll Animations */
.reveal {
  opacity: 0;
  transform: translateY(30px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

/* Responsive Media Queries */
@media (max-width: 992px) {
  .hero-headline .hero-line,
  .hero-description .hero-subline {
    white-space: normal;
  }
  .hero-grid, .about-grid, .statement-grid, .contact-grid {
    grid-template-columns: 1fr;
    gap: 40px;
  }
  .hero-headline {
    font-size: 2.75rem;
  }
  .statement-text-block {
    font-size: 1.85rem;
    margin-right: 0;
  }
  .sand-service-name {
    font-size: 2.25rem;
  }
  .sand-process-grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
  }
  .sand-process-item {
    border-right: none;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    padding-right: 0;
    padding-bottom: 20px;
  }
}

@media (max-width: 768px) {
  .nav-links {
    display: none;
  }
  .mobile-menu-toggle {
    display: block;
  }
  .hero-headline {
    font-size: 2.25rem;
  }
  .section-title {
    font-size: 2.2rem;
  }
  .sand-service-name {
    font-size: 1.75rem;
  }
  .sand-process-grid {
    grid-template-columns: 1fr;
  }
  .hero-metrics-grid {
    flex-wrap: wrap;
    gap: 20px;
  }
}

/* ==========================================================================
   3D STACKED CAROUSEL SYSTEM (shadcn carousel-07 inspired)
   ========================================================================== */

.stacked-carousel-wrapper {
  position: relative;
  width: 100%;
  max-width: 1100px;
  margin: 0 auto;
  padding: 10px 0 30px 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  user-select: none;
  touch-action: pan-y;
  overflow: hidden;
}

.stacked-carousel-stage {
  position: relative;
  width: 100%;
  height: 410px;
  display: flex;
  align-items: center;
  justify-content: center;
  perspective: 1000px;
  overflow: hidden;
}

.stacked-card {
  position: absolute;
  width: 240px;
  height: 350px;
  border-radius: 16px;
  overflow: hidden;
  background: #141414;
  border: 1px solid rgba(255, 255, 255, 0.12);
  box-shadow: 0 16px 40px rgba(0, 0, 0, 0.9), 0 0 20px rgba(0, 0, 0, 0.5);
  transition: transform 0.45s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.45s ease, border-color 0.3s ease;
  cursor: pointer !important;
  transform-origin: center center;
  will-change: transform, opacity;
  user-select: none;
}
}

.stacked-card:hover {
  border-color: var(--accent-red);
}

.stacked-card-poster {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s ease;
  pointer-events: none;
}

.stacked-card:hover .stacked-card-poster {
  transform: scale(1.08);
}

.stacked-card-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, rgba(0, 0, 0, 0.95) 0%, rgba(0, 0, 0, 0.35) 50%, transparent 100%);
  pointer-events: none;
}

.stacked-card-badge {
  position: absolute;
  top: 14px;
  right: 14px;
  padding: 4px 12px;
  border-radius: 99px;
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(8px);
  color: #000000;
  font-size: 0.7rem;
  font-weight: 800;
  text-transform: uppercase;
  letter-spacing: 1px;
  z-index: 10;
  pointer-events: none;
}

.stacked-card-content {
  position: absolute;
  bottom: 18px;
  left: 16px;
  right: 16px;
  color: #ffffff;
  z-index: 10;
  pointer-events: none;
}

.stacked-card-title {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 900;
  line-height: 1.2;
  margin-bottom: 4px;
  color: var(--text-white);
  text-transform: uppercase;
  letter-spacing: -0.3px;
  -webkit-text-stroke: 0.3px currentColor;
  text-shadow: 0 2px 8px rgba(0, 0, 0, 0.8);
}

.stacked-card-desc {
  font-size: 0.8rem;
  color: rgba(255, 255, 255, 0.8);
  line-height: 1.35;
  font-style: italic;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.stacked-card-play-btn {
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%) scale(0.9);
  width: 48px;
  height: 48px;
  border-radius: 50%;
  background: rgba(211, 27, 43, 0.92);
  color: #ffffff;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.1rem;
  opacity: 0;
  transition: all 0.35s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 8px 25px rgba(211, 27, 43, 0.5);
  z-index: 15;
  pointer-events: none;
}

.stacked-card:hover .stacked-card-play-btn {
  opacity: 1;
  transform: translate(-50%, -50%) scale(1);
}

/* Controls & Indicators */
.stacked-carousel-controls {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-top: 16px;
  z-index: 250;
}

.stacked-nav-btn {
  width: 40px;
  height: 40px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  color: var(--text-white);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.3s ease;
}

.stacked-nav-btn:hover {
  background: var(--accent-red);
  border-color: var(--accent-red);
  transform: scale(1.08);
}

.stacked-carousel-dots {
  display: flex;
  align-items: center;
  gap: 8px;
}

.stacked-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.25);
  transition: all 0.3s ease;
  cursor: pointer;
}

.stacked-dot.active {
  width: 24px;
  border-radius: 99px;
  background: var(--accent-red);
}

@media (max-width: 768px) {
  .stacked-carousel-stage {
    height: 310px;
  }
  .stacked-card {
    width: 180px;
    height: 260px;
  }
  .stacked-card-title {
    font-size: 0.95rem;
  }
}