/* ================================================================
   Smart Sensor Mapping System - Main Stylesheet
   Modern IoT / Agriculture Theme
   ================================================================ */

/* ---- CSS VARIABLES ---- */
:root {
  --primary:       #1b4332;
  --primary-light: #2d6a4f;
  --primary-mid:   #40916c;
  --accent:        #52b788;
  --accent-light:  #74c69d;
  --accent-pale:   #b7e4c7;
  --tech-blue:     #0077b6;
  --sky:           #00b4d8;
  --sky-light:     #90e0ef;
  --dark:          #0a0f14;
  --dark-card:     #111927;
  --dark-mid:      #1a2535;
  --gray-dark:     #374151;
  --gray:          #6b7280;
  --gray-light:    #d1d5db;
  --light:         #f0f7f4;
  --white:         #ffffff;
  --danger:        #ef4444;
  --warning:       #f59e0b;
  --success:       #10b981;
  --info:          #3b82f6;

  --footer-bg:     #0a0f14;

  --font-head:     'Poppins', sans-serif;
  --font-body:     'Inter', sans-serif;

  --radius-sm:     8px;
  --radius:        16px;
  --radius-lg:     24px;
  --radius-xl:     32px;

  --shadow-sm:     0 2px 8px rgba(0,0,0,.08);
  --shadow:        0 4px 24px rgba(0,0,0,.12);
  --shadow-lg:     0 8px 48px rgba(0,0,0,.18);
  --shadow-glow:   0 0 40px rgba(82,183,136,.25);

  --transition:    all .3s cubic-bezier(.4,0,.2,1);
  --transition-slow: all .6s cubic-bezier(.4,0,.2,1);
  --navbar-h:      80px;
}

/* ---- RESET & BASE ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; font-size: 16px; }

body {
  font-family: var(--font-body);
  background: var(--white);
  color: var(--gray-dark);
  line-height: 1.7;
  overflow-x: hidden;
}

a { color: inherit; text-decoration: none; transition: var(--transition); }
img { max-width: 100%; display: block; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font-family: inherit; }
input, textarea, select { font-family: inherit; }

.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.section-padding { padding: 100px 0; }
.section-padding-sm { padding: 60px 0; }

/* ---- PRELOADER ---- */
#preloader {
  position: fixed; inset: 0;
  background: var(--dark);
  display: flex; align-items: center; justify-content: center;
  z-index: 9999;
  transition: opacity .5s, visibility .5s;
}
#preloader.hidden { opacity: 0; visibility: hidden; }
.preloader-inner { text-align: center; color: var(--white); }
.preloader-icon {
  font-size: 3rem; color: var(--accent);
  animation: pulse 1.2s infinite;
  margin-bottom: 20px;
}
.preloader-dots { display: flex; gap: 8px; justify-content: center; margin: 16px 0; }
.preloader-dots span {
  width: 10px; height: 10px; border-radius: 50%;
  background: var(--accent);
  animation: bounce 1.2s infinite;
}
.preloader-dots span:nth-child(2) { animation-delay: .2s; }
.preloader-dots span:nth-child(3) { animation-delay: .4s; }
.preloader-inner p { font-family: var(--font-head); font-size: .85rem; letter-spacing: 2px; opacity: .7; text-transform: uppercase; }

/* ---- NAVBAR ---- */
.navbar {
  position: fixed; top: 0; left: 0; width: 100%; z-index: 1000;
  transition: var(--transition-slow);
  padding: 0;
}
.navbar.scrolled {
  background: rgba(10,15,20,.95);
  backdrop-filter: blur(20px);
  box-shadow: 0 4px 30px rgba(0,0,0,.3);
}
.nav-container {
  max-width: 1300px; margin: 0 auto;
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 24px; height: var(--navbar-h);
}
.nav-logo { display: flex; align-items: center; }
.logo-text-brand { display: flex; align-items: center; gap: 12px; }
.logo-icon {
  width: 42px; height: 42px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary-mid), var(--accent));
  display: flex; align-items: center; justify-content: center;
  color: white; font-size: 1.2rem;
  box-shadow: 0 4px 15px rgba(82,183,136,.4);
}
.logo-main {
  display: block; font-family: var(--font-head); font-weight: 700;
  font-size: 1.15rem; color: var(--white); line-height: 1.1;
}
.logo-sub { display: block; font-size: .65rem; color: var(--accent-light); letter-spacing: 1px; }

.nav-menu {
  display: flex; align-items: center; gap: 4px;
}
.nav-link {
  display: flex; align-items: center; gap: 6px;
  padding: 8px 14px; border-radius: var(--radius-sm);
  color: rgba(255,255,255,.85); font-size: .9rem; font-weight: 500;
  transition: var(--transition);
}
.nav-link i { font-size: .75rem; }
.nav-link:hover, .nav-link.active {
  color: var(--accent-light);
  background: rgba(82,183,136,.12);
}
.nav-link.active { color: var(--accent); }

.nav-actions { display: flex; align-items: center; gap: 12px; }
.btn-nav-cta {
  display: flex; align-items: center; gap: 8px;
  padding: 8px 20px; border-radius: 50px;
  background: linear-gradient(135deg, var(--primary-mid), var(--accent));
  color: white; font-size: .85rem; font-weight: 600;
  box-shadow: 0 4px 15px rgba(82,183,136,.35);
  transition: var(--transition);
}
.btn-nav-cta:hover { transform: translateY(-2px); box-shadow: 0 6px 25px rgba(82,183,136,.5); }

.hamburger { display: none; flex-direction: column; gap: 5px; padding: 8px; }
.hamburger span {
  display: block; width: 24px; height: 2px;
  background: var(--white); border-radius: 2px;
  transition: var(--transition);
}
.hamburger.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.active span:nth-child(2) { opacity: 0; }
.hamburger.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-menu {
  display: none; position: absolute; top: var(--navbar-h); left: 0; width: 100%;
  background: rgba(10,15,20,.97); backdrop-filter: blur(20px);
  padding: 16px 24px 24px;
  border-top: 1px solid rgba(255,255,255,.05);
}
.mobile-menu.open { display: block; }
.mobile-menu ul { display: flex; flex-direction: column; gap: 4px; }
.mobile-menu a {
  display: flex; align-items: center; gap: 10px;
  padding: 12px 16px; border-radius: var(--radius-sm);
  color: rgba(255,255,255,.8); font-size: .95rem;
  transition: var(--transition);
}
.mobile-menu a:hover, .mobile-menu a.active {
  background: rgba(82,183,136,.15);
  color: var(--accent-light);
}

/* ---- SECTION HEADERS ---- */
.section-header { text-align: center; margin-bottom: 60px; }
.section-label {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 16px; border-radius: 50px;
  background: rgba(82,183,136,.12); border: 1px solid rgba(82,183,136,.2);
  color: var(--accent); font-size: .8rem; font-weight: 600; letter-spacing: 1.5px;
  text-transform: uppercase; margin-bottom: 16px;
}
.section-label i { font-size: .75rem; }
.section-title {
  font-family: var(--font-head); font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700; line-height: 1.2; color: var(--dark);
  margin-bottom: 16px;
}
.section-title span { color: var(--primary-mid); }
.section-subtitle { font-size: 1.05rem; color: var(--gray); max-width: 600px; margin: 0 auto; }

.section-title.white { color: var(--white); }
.section-subtitle.white { color: rgba(255,255,255,.75); }

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 14px 32px; border-radius: 50px;
  font-weight: 600; font-size: .95rem;
  transition: var(--transition); cursor: pointer;
  border: 2px solid transparent;
}
.btn-primary {
  background: linear-gradient(135deg, var(--primary-mid), var(--accent));
  color: white;
  box-shadow: 0 4px 20px rgba(82,183,136,.35);
}
.btn-primary:hover { transform: translateY(-3px); box-shadow: 0 8px 30px rgba(82,183,136,.5); }
.btn-outline {
  border-color: rgba(255,255,255,.5); color: white;
  background: rgba(255,255,255,.05); backdrop-filter: blur(10px);
}
.btn-outline:hover { background: rgba(255,255,255,.15); border-color: white; }
.btn-outline-dark { border-color: var(--primary-mid); color: var(--primary-mid); background: transparent; }
.btn-outline-dark:hover { background: var(--primary-mid); color: white; }
.btn-sm { padding: 8px 20px; font-size: .85rem; }
.btn-lg { padding: 18px 44px; font-size: 1.05rem; }
.btn-icon { width: 44px; height: 44px; padding: 0; border-radius: 50%; justify-content: center; }

/* ---- HERO SLIDER ---- */
.hero-slider { position: relative; height: 100vh; min-height: 650px; overflow: hidden; }
.hero-slider .swiper { width: 100%; height: 100%; }
.slide-bg {
  position: absolute; inset: 0; z-index: 0;
  background-size: cover; background-position: center;
  transform: scale(1.05);
  transition: transform 8s ease;
}
.swiper-slide-active .slide-bg { transform: scale(1); }
.slide-video {
  position: absolute; inset: 0; width: 100%; height: 100%;
  object-fit: cover; z-index: 0;
}
.slide-overlay {
  position: absolute; inset: 0; z-index: 1;
  background: linear-gradient(135deg, rgba(10,63,42,.75) 0%, rgba(0,30,60,.6) 100%);
}
.slide-content {
  position: relative; z-index: 2;
  height: 100%; display: flex; align-items: center;
  padding: 0 24px; max-width: 1200px; margin: 0 auto;
}
.slide-text { max-width: 720px; color: white; }
.slide-tag {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 6px 16px; border-radius: 50px;
  background: rgba(82,183,136,.2); border: 1px solid rgba(82,183,136,.4);
  color: var(--accent-light); font-size: .8rem; font-weight: 600;
  letter-spacing: 1px; text-transform: uppercase; margin-bottom: 20px;
}
.slide-title {
  font-family: var(--font-head);
  font-size: clamp(2rem, 5vw, 3.8rem);
  font-weight: 800; line-height: 1.15;
  margin-bottom: 20px;
  text-shadow: 0 2px 20px rgba(0,0,0,.3);
}
.slide-title span { color: var(--accent-light); }
.slide-desc {
  font-size: clamp(1rem, 2vw, 1.15rem);
  line-height: 1.8; margin-bottom: 36px;
  color: rgba(255,255,255,.85);
  max-width: 580px;
}
.slide-btns { display: flex; flex-wrap: wrap; gap: 14px; }

/* Slider Controls */
.hero-controls {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
  z-index: 10; display: flex; align-items: center; gap: 20px;
}
.swiper-pagination-bullet {
  width: 30px; height: 4px; border-radius: 2px;
  background: rgba(255,255,255,.4); opacity: 1;
  transition: var(--transition);
}
.swiper-pagination-bullet-active { background: var(--accent); width: 50px; }
.hero-nav-btn {
  position: absolute; top: 50%; z-index: 10; transform: translateY(-50%);
  width: 52px; height: 52px; border-radius: 50%;
  background: rgba(255,255,255,.1); backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,.2);
  color: white; font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition);
}
.hero-nav-btn:hover { background: rgba(82,183,136,.4); border-color: var(--accent); }
.hero-nav-prev { left: 24px; }
.hero-nav-next { right: 24px; }

/* Scroll indicator */
.scroll-indicator {
  position: absolute; bottom: 32px; right: 40px; z-index: 10;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  color: rgba(255,255,255,.6); font-size: .7rem; letter-spacing: 2px;
  text-transform: uppercase;
}
.scroll-indicator .scroll-line {
  width: 1px; height: 50px;
  background: linear-gradient(to bottom, rgba(255,255,255,.6), transparent);
  animation: scrollLine 2s infinite;
}

/* ---- ABOUT TEASER (HOME) ---- */
.about-teaser { background: var(--white); }
.about-teaser-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 80px; align-items: center;
}
.about-img-wrapper {
  position: relative; border-radius: var(--radius-lg);
  overflow: hidden; box-shadow: var(--shadow-lg);
}
.about-img-wrapper img { width: 100%; height: 450px; object-fit: cover; }
.about-img-badge {
  position: absolute; bottom: 24px; left: 24px;
  background: rgba(10,15,20,.85); backdrop-filter: blur(20px);
  border: 1px solid rgba(82,183,136,.3);
  border-radius: var(--radius); padding: 16px 20px;
  color: white; display: flex; align-items: center; gap: 12px;
}
.about-img-badge .badge-icon {
  width: 44px; height: 44px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary-mid), var(--accent));
  display: flex; align-items: center; justify-content: center;
  font-size: 1.2rem;
}
.badge-stat { font-family: var(--font-head); font-size: 1.5rem; font-weight: 700; color: var(--accent); }
.badge-label { font-size: .75rem; color: rgba(255,255,255,.7); }
.about-content .section-header { text-align: left; margin-bottom: 24px; }
.about-features { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; margin: 28px 0; }
.about-feature {
  display: flex; align-items: flex-start; gap: 12px;
  padding: 16px; border-radius: var(--radius);
  background: var(--light); transition: var(--transition);
}
.about-feature:hover { background: rgba(82,183,136,.08); transform: translateY(-2px); }
.feature-icon-sm {
  width: 36px; height: 36px; border-radius: 8px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--primary-mid), var(--accent));
  display: flex; align-items: center; justify-content: center;
  color: white; font-size: .85rem;
}
.about-feature h5 { font-size: .85rem; font-weight: 600; color: var(--dark); margin-bottom: 2px; }
.about-feature p { font-size: .78rem; color: var(--gray); line-height: 1.4; }

/* ---- STATS SECTION ---- */
.stats-section {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 50%, var(--primary-mid) 100%);
  position: relative; overflow: hidden;
}
.stats-section::before {
  content: ''; position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
}
.stats-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 2px; position: relative;
}
.stat-item {
  text-align: center; padding: 48px 24px;
  border-right: 1px solid rgba(255,255,255,.1);
  color: white;
}
.stat-item:last-child { border-right: none; }
.stat-icon {
  width: 64px; height: 64px; border-radius: var(--radius);
  background: rgba(255,255,255,.1); backdrop-filter: blur(10px);
  border: 1px solid rgba(255,255,255,.15);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.5rem; margin: 0 auto 20px;
  transition: var(--transition);
}
.stat-item:hover .stat-icon { background: rgba(255,255,255,.2); transform: scale(1.1); }
.stat-number {
  font-family: var(--font-head); font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800; line-height: 1; margin-bottom: 8px;
  background: linear-gradient(135deg, #fff, var(--accent-pale));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
}
.stat-label { font-size: .9rem; color: rgba(255,255,255,.75); font-weight: 500; }

/* ---- HOW IT WORKS ---- */
.hiw-section { background: var(--light); }
.hiw-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 24px; position: relative;
}
.hiw-grid::before {
  content: ''; position: absolute; top: 48px; left: 10%; right: 10%;
  height: 2px; background: linear-gradient(to right, var(--accent-pale), var(--accent), var(--accent-pale));
  z-index: 0;
}
.hiw-step {
  text-align: center; padding: 32px 24px;
  background: var(--white); border-radius: var(--radius-lg);
  box-shadow: var(--shadow); position: relative; z-index: 1;
  transition: var(--transition);
}
.hiw-step:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.step-number {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  width: 28px; height: 28px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-mid), var(--accent));
  color: white; font-size: .75rem; font-weight: 700;
  display: flex; align-items: center; justify-content: center;
}
.step-icon {
  width: 72px; height: 72px; border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(27,67,50,.08), rgba(82,183,136,.12));
  border: 1px solid rgba(82,183,136,.2);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.8rem; color: var(--primary-mid);
  margin: 0 auto 20px; transition: var(--transition);
}
.hiw-step:hover .step-icon {
  background: linear-gradient(135deg, var(--primary-mid), var(--accent));
  color: white; transform: scale(1.1);
}
.hiw-step h3 { font-family: var(--font-head); font-size: 1rem; font-weight: 700; color: var(--dark); margin-bottom: 10px; }
.hiw-step p { font-size: .85rem; color: var(--gray); line-height: 1.6; }

/* ---- FEATURES GRID ---- */
.features-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}
.feature-card {
  background: var(--white); border-radius: var(--radius-lg);
  padding: 36px 28px; box-shadow: var(--shadow);
  border: 1px solid rgba(0,0,0,.04);
  transition: var(--transition); position: relative; overflow: hidden;
}
.feature-card::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--primary-mid), var(--accent), var(--sky));
  transform: scaleX(0); transform-origin: left;
  transition: var(--transition);
}
.feature-card:hover::before { transform: scaleX(1); }
.feature-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.feature-card-icon {
  width: 64px; height: 64px; border-radius: var(--radius);
  background: linear-gradient(135deg, rgba(27,67,50,.08), rgba(82,183,136,.12));
  border: 1px solid rgba(82,183,136,.2);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.6rem; color: var(--primary-mid);
  margin-bottom: 20px; transition: var(--transition);
}
.feature-card:hover .feature-card-icon {
  background: linear-gradient(135deg, var(--primary-mid), var(--accent));
  color: white;
}
.feature-card h3 { font-family: var(--font-head); font-size: 1.1rem; font-weight: 700; color: var(--dark); margin-bottom: 10px; }
.feature-card p { font-size: .88rem; color: var(--gray); line-height: 1.7; }
.feature-card .card-link {
  display: inline-flex; align-items: center; gap: 6px; margin-top: 16px;
  font-size: .85rem; font-weight: 600; color: var(--primary-mid);
  transition: var(--transition);
}
.feature-card:hover .card-link { gap: 10px; }

/* ---- SENSOR DATA SECTION ---- */
.sensor-section {
  background: linear-gradient(135deg, var(--dark) 0%, var(--dark-mid) 100%);
  position: relative; overflow: hidden;
}
.sensor-section::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(27,67,50,.3) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 50%, rgba(0,119,182,.2) 0%, transparent 60%);
}
.sensor-grid {
  display: grid; grid-template-columns: 1fr 1.2fr;
  gap: 48px; align-items: start; position: relative;
}
.sensor-cards { display: flex; flex-direction: column; gap: 16px; }
.sensor-card {
  background: rgba(255,255,255,.05); backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,.1); border-radius: var(--radius);
  padding: 20px; display: flex; align-items: center; gap: 16px;
  transition: var(--transition);
}
.sensor-card:hover { background: rgba(82,183,136,.1); border-color: rgba(82,183,136,.3); }
.sensor-card-icon {
  width: 52px; height: 52px; border-radius: 12px; flex-shrink: 0;
  display: flex; align-items: center; justify-content: center;
  font-size: 1.3rem;
}
.sensor-card-icon.moisture { background: rgba(0,180,216,.15); color: var(--sky); }
.sensor-card-icon.temp { background: rgba(245,158,11,.15); color: var(--warning); }
.sensor-card-icon.ph { background: rgba(82,183,136,.15); color: var(--accent); }
.sensor-card-icon.nutrient { background: rgba(139,92,246,.15); color: #a78bfa; }
.sensor-card-body { flex: 1; }
.sensor-card-body h4 { font-size: .8rem; color: rgba(255,255,255,.5); text-transform: uppercase; letter-spacing: 1px; margin-bottom: 4px; }
.sensor-card-value { font-family: var(--font-head); font-size: 1.6rem; font-weight: 700; color: white; }
.sensor-card-unit { font-size: .75rem; color: rgba(255,255,255,.5); }
.sensor-status { display: flex; align-items: center; gap: 6px; margin-top: 4px; }
.status-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--success); animation: pulse 2s infinite; }
.status-text { font-size: .72rem; color: var(--accent-light); }
.chart-container {
  background: rgba(255,255,255,.04); backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,.08); border-radius: var(--radius-lg);
  padding: 24px;
}
.chart-header {
  display: flex; align-items: center; justify-content: space-between;
  margin-bottom: 20px;
}
.chart-title { font-family: var(--font-head); font-size: 1rem; font-weight: 600; color: white; }
.chart-filters { display: flex; gap: 8px; }
.chart-filter-btn {
  padding: 4px 12px; border-radius: 50px; font-size: .75rem; font-weight: 500;
  border: 1px solid rgba(255,255,255,.15); color: rgba(255,255,255,.6);
  transition: var(--transition);
}
.chart-filter-btn.active, .chart-filter-btn:hover {
  background: rgba(82,183,136,.2); border-color: var(--accent);
  color: var(--accent-light);
}

/* ---- SENSOR TABLE ---- */
.sensor-table-wrapper {
  background: rgba(255,255,255,.04); backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,.08); border-radius: var(--radius-lg);
  overflow: hidden; margin-top: 40px;
}
.table-header-row {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 24px; border-bottom: 1px solid rgba(255,255,255,.06);
}
.table-title { font-family: var(--font-head); font-size: 1rem; font-weight: 600; color: white; }
.live-indicator {
  display: flex; align-items: center; gap: 8px;
  font-size: .75rem; color: var(--accent-light);
}
.live-dot { width: 8px; height: 8px; border-radius: 50%; background: var(--success); animation: pulse 1.5s infinite; }
.sensor-table { width: 100%; border-collapse: collapse; }
.sensor-table th {
  padding: 12px 16px; text-align: left; font-size: .75rem;
  color: rgba(255,255,255,.4); text-transform: uppercase;
  letter-spacing: 1px; border-bottom: 1px solid rgba(255,255,255,.06);
}
.sensor-table td {
  padding: 14px 16px; font-size: .85rem; color: rgba(255,255,255,.75);
  border-bottom: 1px solid rgba(255,255,255,.04);
}
.sensor-table tr:hover td { background: rgba(82,183,136,.05); }
.sensor-table tr:last-child td { border-bottom: none; }
.badge-status {
  display: inline-flex; align-items: center; gap: 4px;
  padding: 3px 10px; border-radius: 50px; font-size: .72rem; font-weight: 600;
}
.badge-status.online { background: rgba(16,185,129,.15); color: #34d399; }
.badge-status.offline { background: rgba(239,68,68,.15); color: #f87171; }

/* ---- CTA SECTION ---- */
.cta-section {
  background: linear-gradient(135deg, var(--primary), var(--primary-mid), var(--accent));
  position: relative; overflow: hidden;
}
.cta-section::before {
  content: ''; position: absolute; inset: 0;
  background: url("data:image/svg+xml,%3Csvg width='100' height='100' viewBox='0 0 100 100' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M11 18c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm48 25c3.866 0 7-3.134 7-7s-3.134-7-7-7-7 3.134-7 7 3.134 7 7 7zm-43-7c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm63 31c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zM34 90c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3zm56-76c1.657 0 3-1.343 3-3s-1.343-3-3-3-3 1.343-3 3 1.343 3 3 3z' fill='%23ffffff' fill-opacity='0.04'/%3E%3C/svg%3E");
}
.cta-inner { text-align: center; position: relative; color: white; }
.cta-inner h2 { font-family: var(--font-head); font-size: clamp(2rem, 4vw, 3rem); font-weight: 800; margin-bottom: 16px; }
.cta-inner p { font-size: 1.1rem; color: rgba(255,255,255,.85); margin-bottom: 36px; max-width: 600px; margin-left: auto; margin-right: auto; }
.cta-btns { display: flex; flex-wrap: wrap; gap: 16px; justify-content: center; }
.btn-white { background: white; color: var(--primary); font-weight: 700; }
.btn-white:hover { background: rgba(255,255,255,.9); transform: translateY(-3px); box-shadow: 0 8px 30px rgba(0,0,0,.2); }
.btn-transparent { background: rgba(255,255,255,.1); color: white; border: 2px solid rgba(255,255,255,.4); }
.btn-transparent:hover { background: rgba(255,255,255,.2); border-color: white; }

/* ---- GALLERY PREVIEW (HOME) ---- */
.gallery-preview-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  grid-template-rows: repeat(2, 240px);
  gap: 16px;
}
.gallery-preview-item {
  border-radius: var(--radius); overflow: hidden;
  position: relative; cursor: pointer;
}
.gallery-preview-item:first-child { grid-row: span 2; }
.gallery-preview-item img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .5s ease;
}
.gallery-preview-item:hover img { transform: scale(1.08); }
.gallery-preview-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(10,63,42,.8), transparent);
  opacity: 0; transition: var(--transition); display: flex;
  align-items: flex-end; padding: 20px;
}
.gallery-preview-item:hover .gallery-preview-overlay { opacity: 1; }
.gallery-preview-overlay span { color: white; font-weight: 600; font-size: .9rem; }
.gallery-placeholder {
  width: 100%; height: 100%; background: var(--light);
  display: flex; align-items: center; justify-content: center;
  flex-direction: column; gap: 8px; color: var(--gray);
}
.gallery-placeholder i { font-size: 2.5rem; opacity: .4; }

/* ---- ABOUT PAGE ---- */
.page-hero {
  min-height: 60vh; display: flex; align-items: center;
  background: linear-gradient(135deg, var(--dark) 0%, var(--primary) 100%);
  position: relative; overflow: hidden; padding-top: var(--navbar-h);
}
.page-hero::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(ellipse at 30% 50%, rgba(82,183,136,.2) 0%, transparent 60%);
}
.page-hero-content { text-align: center; color: white; position: relative; }
.page-hero h1 {
  font-family: var(--font-head); font-size: clamp(2.2rem, 5vw, 4rem);
  font-weight: 800; margin-bottom: 16px;
}
.page-hero p { font-size: 1.1rem; color: rgba(255,255,255,.8); max-width: 600px; margin: 0 auto 24px; }
.breadcrumb { display: flex; align-items: center; gap: 8px; justify-content: center; }
.breadcrumb a { color: rgba(255,255,255,.6); font-size: .85rem; }
.breadcrumb a:hover { color: var(--accent-light); }
.breadcrumb span { color: rgba(255,255,255,.3); }
.breadcrumb .current { color: var(--accent-light); font-size: .85rem; }

.about-grid-full {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 80px; align-items: center;
}
.about-img-float { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.about-img-float img { width: 100%; height: 500px; object-fit: cover; }

.mission-vision-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 24px; margin: 40px 0; }
.mv-card {
  padding: 36px; border-radius: var(--radius-lg); position: relative; overflow: hidden;
  transition: var(--transition);
}
.mv-card.mission { background: linear-gradient(135deg, var(--primary), var(--primary-light)); color: white; }
.mv-card.vision { background: linear-gradient(135deg, var(--tech-blue), var(--sky)); color: white; }
.mv-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.mv-icon { font-size: 2.5rem; margin-bottom: 16px; }
.mv-card h3 { font-family: var(--font-head); font-size: 1.2rem; font-weight: 700; margin-bottom: 12px; }
.mv-card p { font-size: .9rem; line-height: 1.7; opacity: .9; }

.values-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.value-card {
  padding: 28px 20px; text-align: center; border-radius: var(--radius);
  background: var(--white); box-shadow: var(--shadow);
  border: 1px solid rgba(0,0,0,.04); transition: var(--transition);
}
.value-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: rgba(82,183,136,.2); }
.value-icon {
  width: 60px; height: 60px; border-radius: 50%;
  background: linear-gradient(135deg, rgba(27,67,50,.08), rgba(82,183,136,.12));
  border: 2px solid rgba(82,183,136,.2);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem; color: var(--primary-mid);
  margin: 0 auto 16px; transition: var(--transition);
}
.value-card:hover .value-icon { background: linear-gradient(135deg, var(--primary-mid), var(--accent)); color: white; border-color: transparent; }
.value-card h4 { font-family: var(--font-head); font-size: 1rem; font-weight: 700; color: var(--dark); margin-bottom: 8px; }
.value-card p { font-size: .82rem; color: var(--gray); line-height: 1.6; }

.team-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; }
.team-card {
  border-radius: var(--radius-lg); overflow: hidden;
  box-shadow: var(--shadow); background: white; transition: var(--transition);
}
.team-card:hover { transform: translateY(-8px); box-shadow: var(--shadow-lg); }
.team-avatar {
  width: 100%; height: 220px; background: var(--light);
  display: flex; align-items: center; justify-content: center;
  font-size: 4rem; color: var(--gray-light); position: relative; overflow: hidden;
}
.team-avatar img { width: 100%; height: 100%; object-fit: cover; }
.team-avatar-fallback { font-size: 4rem; color: var(--primary-mid); }
.team-info { padding: 20px; }
.team-info h4 { font-family: var(--font-head); font-size: 1rem; font-weight: 700; color: var(--dark); margin-bottom: 4px; }
.team-role { font-size: .78rem; color: var(--primary-mid); font-weight: 600; margin-bottom: 8px; }
.team-desc { font-size: .78rem; color: var(--gray); line-height: 1.5; }

.timeline { position: relative; padding: 20px 0; }
.timeline::before {
  content: ''; position: absolute; left: 50%; top: 0; bottom: 0; width: 2px;
  background: linear-gradient(to bottom, var(--accent-pale), var(--primary-mid), var(--accent-pale));
  transform: translateX(-50%);
}
.timeline-item { display: flex; gap: 40px; margin-bottom: 48px; align-items: flex-start; }
.timeline-item:nth-child(even) { flex-direction: row-reverse; }
.timeline-content {
  flex: 1; padding: 28px; border-radius: var(--radius);
  background: white; box-shadow: var(--shadow);
  transition: var(--transition);
}
.timeline-item:nth-child(even) .timeline-content { text-align: right; }
.timeline-content:hover { box-shadow: var(--shadow-lg); }
.timeline-year {
  display: inline-block; padding: 4px 12px; border-radius: 50px;
  background: var(--primary-mid); color: white; font-size: .75rem; font-weight: 700;
  margin-bottom: 8px;
}
.timeline-content h4 { font-family: var(--font-head); font-size: 1rem; font-weight: 700; color: var(--dark); margin-bottom: 6px; }
.timeline-content p { font-size: .85rem; color: var(--gray); }
.timeline-dot {
  width: 20px; height: 20px; border-radius: 50%; flex-shrink: 0;
  background: var(--primary-mid); border: 4px solid white;
  box-shadow: 0 0 0 2px var(--accent);
  margin-top: 32px;
  position: relative; z-index: 1;
  left: calc(50% - 10px); /* center on timeline */
}

/* ---- FEATURES PAGE ---- */
.features-hero-icons { display: flex; flex-wrap: wrap; gap: 12px; justify-content: center; margin-top: 32px; }
.features-hero-icons .icon-chip {
  display: flex; align-items: center; gap: 6px;
  padding: 6px 14px; border-radius: 50px;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.15);
  color: rgba(255,255,255,.8); font-size: .8rem;
}

.features-large-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 48px; align-items: center; margin-bottom: 80px; }
.features-large-grid:nth-child(even) .features-large-content { order: -1; }
.features-large-image { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow-lg); }
.features-large-image img { width: 100%; height: 380px; object-fit: cover; }
.features-large-icon {
  width: 72px; height: 72px; border-radius: var(--radius);
  background: linear-gradient(135deg, var(--primary-mid), var(--accent));
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem; color: white; margin-bottom: 20px;
  box-shadow: 0 8px 24px rgba(82,183,136,.3);
}
.features-large-content h2 { font-family: var(--font-head); font-size: 1.8rem; font-weight: 700; color: var(--dark); margin-bottom: 12px; }
.features-large-content p { color: var(--gray); line-height: 1.8; margin-bottom: 24px; }
.feature-list { display: flex; flex-direction: column; gap: 10px; }
.feature-list li {
  display: flex; align-items: flex-start; gap: 10px;
  font-size: .88rem; color: var(--gray-dark);
}
.feature-list li i { color: var(--primary-mid); flex-shrink: 0; margin-top: 2px; }

/* Sensor Data Section (Features page) */
.sensor-data-section { background: var(--dark); }
#sensorChart { max-height: 320px; }
.data-tabs { display: flex; gap: 8px; margin-bottom: 24px; flex-wrap: wrap; }
.data-tab {
  padding: 8px 20px; border-radius: 50px; font-size: .85rem; font-weight: 500;
  border: 1px solid rgba(255,255,255,.15); color: rgba(255,255,255,.6);
  cursor: pointer; transition: var(--transition);
}
.data-tab.active { background: var(--accent); border-color: var(--accent); color: white; }
.data-tab:hover:not(.active) { border-color: rgba(255,255,255,.3); color: rgba(255,255,255,.9); }

/* ---- GALLERY PAGE ---- */
.gallery-filters {
  display: flex; flex-wrap: wrap; gap: 10px; justify-content: center;
  margin-bottom: 40px;
}
.filter-btn {
  padding: 8px 22px; border-radius: 50px; font-size: .85rem; font-weight: 500;
  border: 1px solid var(--gray-light); color: var(--gray);
  background: white; cursor: pointer; transition: var(--transition);
}
.filter-btn.active, .filter-btn:hover {
  background: var(--primary-mid); border-color: var(--primary-mid); color: white;
}
.gallery-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.gallery-item {
  border-radius: var(--radius); overflow: hidden;
  position: relative; aspect-ratio: 4/3; cursor: pointer;
  box-shadow: var(--shadow);
}
.gallery-item img { width: 100%; height: 100%; object-fit: cover; transition: transform .5s ease; }
.gallery-item:hover img { transform: scale(1.08); }
.gallery-item-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(to top, rgba(10,63,42,.9) 0%, rgba(10,63,42,.2) 50%, transparent 100%);
  opacity: 0; transition: var(--transition);
  display: flex; flex-direction: column; justify-content: flex-end; padding: 20px;
}
.gallery-item:hover .gallery-item-overlay { opacity: 1; }
.gallery-item-title { font-weight: 700; font-size: .95rem; color: white; margin-bottom: 4px; }
.gallery-item-cat { font-size: .75rem; color: var(--accent-light); }
.gallery-zoom-btn {
  position: absolute; top: 12px; right: 12px;
  width: 36px; height: 36px; border-radius: 50%;
  background: rgba(255,255,255,.9); color: var(--dark);
  display: flex; align-items: center; justify-content: center; font-size: .85rem;
  opacity: 0; transform: scale(.8); transition: var(--transition);
}
.gallery-item:hover .gallery-zoom-btn { opacity: 1; transform: scale(1); }

/* Lightbox */
.lightbox {
  position: fixed; inset: 0; z-index: 9999;
  background: rgba(0,0,0,.95); display: none;
  align-items: center; justify-content: center;
}
.lightbox.open { display: flex; }
.lightbox-inner { position: relative; max-width: 90vw; max-height: 90vh; }
.lightbox-inner img { max-width: 90vw; max-height: 85vh; object-fit: contain; border-radius: var(--radius); }
.lightbox-close, .lightbox-prev, .lightbox-next {
  position: absolute; width: 48px; height: 48px; border-radius: 50%;
  background: rgba(255,255,255,.1); border: 1px solid rgba(255,255,255,.2);
  color: white; font-size: 1.1rem;
  display: flex; align-items: center; justify-content: center;
  transition: var(--transition); cursor: pointer;
}
.lightbox-close { top: -20px; right: -20px; }
.lightbox-prev { top: 50%; left: -64px; transform: translateY(-50%); }
.lightbox-next { top: 50%; right: -64px; transform: translateY(-50%); }
.lightbox-close:hover, .lightbox-prev:hover, .lightbox-next:hover { background: var(--accent); border-color: var(--accent); }
.lightbox-caption { text-align: center; padding: 16px; color: rgba(255,255,255,.8); font-size: .9rem; }

/* ---- CONTACT PAGE ---- */
.contact-grid {
  display: grid; grid-template-columns: 1fr 1.5fr; gap: 60px; align-items: start;
}
.contact-info-card {
  background: linear-gradient(135deg, var(--primary), var(--primary-light));
  border-radius: var(--radius-lg); padding: 40px; color: white;
  box-shadow: var(--shadow-lg);
}
.contact-info-card h3 { font-family: var(--font-head); font-size: 1.4rem; font-weight: 700; margin-bottom: 8px; }
.contact-info-card > p { color: rgba(255,255,255,.8); margin-bottom: 32px; font-size: .9rem; }
.contact-info-items { display: flex; flex-direction: column; gap: 20px; }
.contact-info-item { display: flex; align-items: flex-start; gap: 16px; }
.ci-icon {
  width: 44px; height: 44px; border-radius: 10px; flex-shrink: 0;
  background: rgba(255,255,255,.15); display: flex; align-items: center;
  justify-content: center; font-size: 1rem;
}
.ci-label { font-size: .72rem; text-transform: uppercase; letter-spacing: 1px; color: rgba(255,255,255,.5); margin-bottom: 4px; }
.ci-value { font-weight: 500; color: rgba(255,255,255,.9); font-size: .9rem; }
.ci-value a { color: inherit; }
.ci-value a:hover { color: var(--accent-light); }
.social-row { display: flex; gap: 10px; margin-top: 28px; }
.social-item {
  width: 40px; height: 40px; border-radius: 10px;
  background: rgba(255,255,255,.12); border: 1px solid rgba(255,255,255,.15);
  display: flex; align-items: center; justify-content: center;
  color: white; transition: var(--transition);
}
.social-item:hover { background: rgba(82,183,136,.3); border-color: var(--accent); }

.contact-form-wrapper {
  background: white; border-radius: var(--radius-lg);
  padding: 44px; box-shadow: var(--shadow);
}
.contact-form-wrapper h3 { font-family: var(--font-head); font-size: 1.4rem; font-weight: 700; color: var(--dark); margin-bottom: 8px; }
.contact-form-wrapper > p { color: var(--gray); margin-bottom: 28px; font-size: .9rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.form-group { margin-bottom: 20px; }
.form-group label { display: block; font-size: .85rem; font-weight: 600; color: var(--dark); margin-bottom: 6px; }
.form-group label .required { color: var(--danger); }
.form-control {
  width: 100%; padding: 13px 16px; border-radius: var(--radius-sm);
  border: 1.5px solid var(--gray-light); font-size: .9rem; font-family: inherit;
  transition: var(--transition); background: var(--light); color: var(--dark);
  outline: none;
}
.form-control:focus { border-color: var(--primary-mid); background: white; box-shadow: 0 0 0 3px rgba(64,145,108,.12); }
.form-control::placeholder { color: var(--gray); }
textarea.form-control { resize: vertical; min-height: 130px; }
.form-submit { width: 100%; padding: 14px; border-radius: var(--radius-sm); font-size: 1rem; font-weight: 600; }

.alert {
  padding: 14px 20px; border-radius: var(--radius-sm); margin-bottom: 20px;
  display: flex; align-items: center; gap: 10px; font-size: .88rem;
}
.alert-success { background: rgba(16,185,129,.1); border: 1px solid rgba(16,185,129,.3); color: #065f46; }
.alert-error { background: rgba(239,68,68,.1); border: 1px solid rgba(239,68,68,.3); color: #991b1b; }
.alert-info { background: rgba(59,130,246,.1); border: 1px solid rgba(59,130,246,.3); color: #1e40af; }
#formMessage { display: none; }

.map-section { margin-top: 60px; }
.map-wrapper { border-radius: var(--radius-lg); overflow: hidden; box-shadow: var(--shadow); height: 400px; }
.map-wrapper iframe { width: 100%; height: 100%; border: 0; }
.map-placeholder {
  width: 100%; height: 100%;
  background: linear-gradient(135deg, var(--light), rgba(82,183,136,.08));
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 12px; color: var(--gray);
}
.map-placeholder i { font-size: 3rem; color: var(--primary-mid); opacity: .5; }

/* ---- FOOTER ---- */
.footer {
  background: var(--footer-bg);
  position: relative; margin-top: auto;
}
.footer-waves { position: absolute; top: -1px; left: 0; right: 0; overflow: hidden; line-height: 0; }
.footer-waves svg { width: 100%; height: 60px; }
.footer-main { padding: 80px 0 40px; }
.footer-container {
  max-width: 1200px; margin: 0 auto; padding: 0 24px;
  display: grid; grid-template-columns: 1.5fr 1fr 1fr 1.2fr; gap: 48px;
}
.footer-col {}
.footer-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.footer-logo-icon {
  width: 44px; height: 44px; border-radius: 10px;
  background: linear-gradient(135deg, var(--primary-mid), var(--accent));
  display: flex; align-items: center; justify-content: center;
  color: white; font-size: 1.2rem;
}
.footer-logo-name { font-family: var(--font-head); font-size: 1.1rem; font-weight: 700; color: white; }
.footer-logo-tagline { font-size: .65rem; color: var(--accent-light); letter-spacing: 1px; }
.footer-description { font-size: .85rem; color: rgba(255,255,255,.5); line-height: 1.7; margin-bottom: 24px; }
.footer-social { display: flex; gap: 10px; }
.social-btn {
  width: 38px; height: 38px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  font-size: .9rem; transition: var(--transition);
  border: 1px solid rgba(255,255,255,.1);
}
.social-btn.facebook { color: #4267B2; background: rgba(66,103,178,.1); }
.social-btn.facebook:hover { background: #4267B2; color: white; }
.social-btn.twitter { color: #1DA1F2; background: rgba(29,161,242,.1); }
.social-btn.twitter:hover { background: #1DA1F2; color: white; }
.social-btn.instagram { color: #E1306C; background: rgba(225,48,108,.1); }
.social-btn.instagram:hover { background: #E1306C; color: white; }
.social-btn.youtube { color: #FF0000; background: rgba(255,0,0,.1); }
.social-btn.youtube:hover { background: #FF0000; color: white; }
.social-btn.linkedin { color: #0077B5; background: rgba(0,119,181,.1); }
.social-btn.linkedin:hover { background: #0077B5; color: white; }
.footer-title {
  font-family: var(--font-head); font-size: .85rem; font-weight: 700;
  color: white; text-transform: uppercase; letter-spacing: 1.5px; margin-bottom: 20px;
  padding-bottom: 12px; border-bottom: 1px solid rgba(255,255,255,.06);
}
.footer-links { display: flex; flex-direction: column; gap: 10px; }
.footer-links a {
  display: flex; align-items: center; gap: 8px;
  font-size: .85rem; color: rgba(255,255,255,.5); transition: var(--transition);
}
.footer-links a i { font-size: .65rem; color: var(--accent); }
.footer-links a:hover { color: var(--accent-light); padding-left: 4px; }
.footer-contact-list { display: flex; flex-direction: column; gap: 16px; }
.footer-contact-list li { display: flex; align-items: flex-start; gap: 12px; }
.footer-contact-icon {
  width: 32px; height: 32px; border-radius: 8px; flex-shrink: 0;
  background: rgba(82,183,136,.12); border: 1px solid rgba(82,183,136,.15);
  display: flex; align-items: center; justify-content: center;
  color: var(--accent); font-size: .8rem;
}
.footer-contact-list span, .footer-contact-list a {
  font-size: .82rem; color: rgba(255,255,255,.5); line-height: 1.5;
}
.footer-contact-list a:hover { color: var(--accent-light); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.05);
  padding: 20px 0;
}
.footer-bottom .footer-container {
  display: flex; align-items: center; justify-content: space-between;
  grid-template-columns: unset;
}
.footer-bottom p { font-size: .8rem; color: rgba(255,255,255,.35); }
.footer-badges { display: flex; gap: 12px; }
.footer-badge {
  display: flex; align-items: center; gap: 5px;
  font-size: .72rem; color: rgba(255,255,255,.3);
}
.footer-badge i { color: var(--accent); font-size: .7rem; }

/* ---- BACK TO TOP ---- */
.back-to-top {
  position: fixed; bottom: 32px; right: 32px; z-index: 999;
  width: 48px; height: 48px; border-radius: 50%;
  background: linear-gradient(135deg, var(--primary-mid), var(--accent));
  color: white; font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 20px rgba(82,183,136,.4);
  opacity: 0; transform: translateY(20px);
  transition: var(--transition); cursor: pointer;
}
.back-to-top.visible { opacity: 1; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-4px); box-shadow: 0 8px 30px rgba(82,183,136,.5); }

/* ---- GLASS EFFECT ---- */
.glass {
  background: rgba(255,255,255,.08); backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,.12); border-radius: var(--radius);
}
.glass-dark {
  background: rgba(10,15,20,.6); backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,.08); border-radius: var(--radius);
}

/* ---- ANIMATIONS ---- */
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: .5; }
}
@keyframes bounce {
  0%, 80%, 100% { transform: scale(0); }
  40% { transform: scale(1); }
}
@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}
@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-12px); }
}
@keyframes spin-slow {
  from { transform: rotate(0deg); }
  to { transform: rotate(360deg); }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---- RESPONSIVE ---- */
@media (max-width: 1024px) {
  .about-teaser-grid, .about-grid-full, .contact-grid, .sensor-grid { grid-template-columns: 1fr; gap: 40px; }
  .features-large-grid { grid-template-columns: 1fr; gap: 32px; }
  .features-large-grid:nth-child(even) .features-large-content { order: unset; }
  .hiw-grid, .stats-grid { grid-template-columns: repeat(2, 1fr); }
  .stat-item { border-bottom: 1px solid rgba(255,255,255,.1); }
  .team-grid { grid-template-columns: repeat(2, 1fr); }
  .values-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-container { grid-template-columns: 1fr 1fr; gap: 32px; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery-preview-grid { grid-template-columns: repeat(2, 1fr); grid-template-rows: auto; }
  .gallery-preview-item:first-child { grid-row: span 1; }
}
@media (max-width: 768px) {
  :root { --navbar-h: 70px; }
  .nav-menu, .btn-nav-cta { display: none; }
  .hamburger { display: flex; }
  .section-padding { padding: 70px 0; }
  .features-grid, .hiw-grid, .stats-grid, .team-grid, .values-grid, .mission-vision-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .footer-container { grid-template-columns: 1fr; }
  .footer-bottom .footer-container { flex-direction: column; gap: 12px; text-align: center; }
  .gallery-grid { grid-template-columns: repeat(2, 1fr); }
  .gallery-preview-grid { grid-template-columns: 1fr 1fr; }
  .hero-nav-btn { width: 40px; height: 40px; font-size: .9rem; }
  .slide-title { font-size: 1.8rem; }
  .timeline::before { left: 16px; }
  .timeline-item, .timeline-item:nth-child(even) { flex-direction: column; gap: 12px; }
  .timeline-dot { left: 7px; margin-top: 0; }
  .timeline-item:nth-child(even) .timeline-content { text-align: left; }
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 480px) {
  .container { padding: 0 16px; }
  .slide-btns { flex-direction: column; }
  .gallery-grid, .gallery-preview-grid { grid-template-columns: 1fr; }
  .hero-slider { min-height: 100vh; }
  .slide-desc { display: none; }
  .scroll-indicator { display: none; }
  .hero-nav-btn { display: none; }
}