/* ==========================================================================
   Lexora Solar — Premium One-Page Website Stylesheet
   ========================================================================== */

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Light, efficient palette — Lexora logo steel blue & cyan combination */
  --primary: #1D5C93;
  --primary-dark: #14436E;
  --primary-light: #3F83BD;
  --primary-soft: #E4EFF7;
  --primary-pale: #F0F6FA;
  --accent: #0EA5E9;
  --accent-light: #38BDF8;
  --accent-soft: #E0F2FE;

  /* Legacy aliases — map old names to new palette */
  --green: var(--primary);
  --green-dark: var(--primary-dark);
  --green-light: var(--primary-light);
  --yellow: var(--accent);
  --yellow-light: var(--accent-light);
  --amber: var(--primary);
  --amber-light: var(--primary-light);
  --amber-dark: var(--primary-dark);

  /* Soft headings — readable, not heavy black */
  --navy: #1E3A5F;
  --navy-mid: #334155;
  --navy-light: #475569;
  --slate: #64748B;
  --slate-light: #94A3B8;
  --white: #FFFFFF;
  --off-white: #FAFBFC;
  --surface-warm: #F8FAFC;
  --surface-cool: #F1F5F9;
  --gray-50: #F8FAFC;
  --gray-100: #E2E8F0;
  --gray-200: #CBD5E1;
  --gray-400: #94A3B8;
  --gray-600: #64748B;
  --gray-800: #334155;

  --gradient-green: linear-gradient(135deg, #1D5C93 0%, #2563EB 55%, #0EA5E9 100%);
  --gradient-hero: linear-gradient(135deg, rgba(15, 23, 42, 0.65) 0%, rgba(15, 23, 42, 0.5) 50%, rgba(15, 23, 42, 0.6) 100%);
  --gradient-cta: linear-gradient(135deg, #E4EFF7 0%, #F0F6FA 50%, #E0F2FE 100%);
  --gradient-solar: linear-gradient(135deg, #1D5C93 0%, #0EA5E9 100%);

  --font-display: 'Outfit', system-ui, sans-serif;
  --font-body: 'DM Sans', system-ui, sans-serif;

  --shadow-sm: 0 2px 8px rgba(30, 58, 95, 0.05);
  --shadow-md: 0 8px 30px rgba(30, 58, 95, 0.08);
  --shadow-lg: 0 20px 50px rgba(30, 58, 95, 0.1);
  --shadow-glow: 0 8px 28px rgba(37, 99, 235, 0.22);
  --shadow-navy: 0 12px 36px rgba(30, 58, 95, 0.08);

  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;
  --radius-full: 9999px;

  --glass-bg: rgba(255, 255, 255, 0.95);
  --glass-border: rgba(226, 232, 240, 0.8);
  --glass-blur: blur(20px);

  --header-height: 90px;
  --transition: 0.35s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-premium: 0.5s cubic-bezier(0.25, 0.8, 0.25, 1);
  --container: 1240px;
}

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

html {
  scroll-behavior: smooth;
  scroll-padding-top: var(--header-height);
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--gray-800);
  background: var(--white);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

body.loaded {
  overflow-x: hidden;
}

img {
  max-width: 100%;
  display: block;
}

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

ul {
  list-style: none;
}

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

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

.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------- Typography ---------- */
.section-tag {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--primary-dark);
  background: var(--primary-soft);
  padding: 6px 16px;
  border-radius: var(--radius-full);
  margin-bottom: 16px;
}

.section-tag--navy {
  color: var(--navy-mid);
  background: var(--surface-cool);
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  color: var(--navy);
  margin-bottom: 16px;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 1.1rem;
  color: var(--gray-600);
  max-width: 640px;
}

.section-header {
  text-align: center;
  margin-bottom: 64px;
}

.section-header .section-desc {
  margin: 0 auto;
}

.section {
  padding: 100px 0;
  position: relative;
}

/* ---------- Placeholders ---------- */
.img-placeholder,
.hero__image-placeholder {
  position: relative;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: linear-gradient(145deg, var(--gray-50) 0%, var(--gray-100) 100%);
  border: 2px dashed var(--gray-200);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition);
}

.placeholder-label {
  font-family: var(--font-display);
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--gray-400);
  text-transform: uppercase;
  letter-spacing: 0.08em;
}

.placeholder-hint {
  font-size: 0.75rem;
  color: var(--gray-400);
  margin-top: 4px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 14px 28px;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  transition: all var(--transition-premium);
  position: relative;
  overflow: hidden;
  white-space: nowrap;
  z-index: 1;
}

.btn::before {
  content: '';
  position: absolute;
  top: 0;
  left: -100%;
  width: 100%;
  height: 100%;
  background: linear-gradient(
    120deg,
    transparent,
    rgba(255, 255, 255, 0.3),
    transparent
  );
  transition: left 0.6s cubic-bezier(0.25, 0.8, 0.25, 1);
  z-index: -1;
}

.btn:hover::before {
  left: 100%;
}

.btn:active {
  transform: translateY(-1px) scale(0.98) !important;
}

.btn--primary {
  background: var(--gradient-green);
  color: var(--white);
  box-shadow: var(--shadow-glow);
}

.btn--primary:hover {
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 15px 35px rgba(14, 165, 233, 0.4), 0 5px 15px rgba(29, 92, 147, 0.2);
}

.btn--outline {
  background: rgba(255, 255, 255, 0.1);
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.3);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
}

.btn--outline:hover {
  background: rgba(255, 255, 255, 0.2);
  border-color: var(--accent-light);
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 10px 25px rgba(14, 165, 233, 0.15);
}

.btn--white {
  background: var(--white);
  color: var(--navy);
  box-shadow: var(--shadow-sm);
}

.btn--white:hover {
  background: var(--primary-soft);
  color: var(--primary-dark);
  transform: translateY(-3px) scale(1.02);
  box-shadow: 0 12px 30px rgba(29, 92, 147, 0.15);
}

.btn--sm {
  padding: 10px 20px;
  font-size: 0.85rem;
}

.btn--lg {
  padding: 16px 36px;
  font-size: 1rem;
}

.btn--full {
  width: 100%;
}

/* Ripple effect container */
.ripple-btn {
  position: relative;
  overflow: hidden;
}

.ripple {
  position: absolute;
  border-radius: 50%;
  background: rgba(255, 255, 255, 0.4);
  transform: scale(0);
  animation: rippleAnim 0.6s ease-out;
  pointer-events: none;
}

@keyframes rippleAnim {
  to {
    transform: scale(4);
    opacity: 0;
  }
}

/* ---------- Glass Card ---------- */
.glass-card {
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

/* ---------- Loader ---------- */
.loader {
  position: fixed;
  inset: 0;
  z-index: 10000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-pale);
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

.loader.hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.loader__inner {
  text-align: center;
}

.loader__logo {
  display: block;
  width: min(220px, 70vw);
  height: auto;
  margin: 0 auto 28px;
  object-fit: contain;
  animation: loaderPulse 2s ease-in-out infinite;
}

@keyframes loaderPulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.85; transform: scale(1.03); }
}

.loader__bar {
  width: 200px;
  height: 3px;
  background: var(--primary-soft);
  border-radius: var(--radius-full);
  overflow: hidden;
  margin: 0 auto;
}

.loader__bar span {
  display: block;
  height: 100%;
  width: 0;
  background: var(--gradient-green);
  border-radius: var(--radius-full);
  animation: loadBar 1.8s ease-in-out forwards;
}

@keyframes loadBar {
  to { width: 100%; }
}

/* ---------- Header (light) ---------- */
.header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--header-height);
  background: rgba(255, 255, 255, 0.82);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid transparent;
  transition: background var(--transition-premium), box-shadow var(--transition-premium), border-color var(--transition-premium), height var(--transition-premium);
}

.header.scrolled {
  background: rgba(255, 255, 255, 0.95);
  border-bottom-color: rgba(226, 232, 240, 0.8);
  box-shadow: 0 10px 30px -10px rgba(30, 58, 95, 0.1);
}

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

.logo {
  display: flex;
  align-items: center;
  z-index: 1001;
  flex-shrink: 0;
}

.logo__img {
  display: block;
  height: 58px;
  width: auto;
  object-fit: contain;
  image-rendering: -webkit-optimize-contrast;
  image-rendering: crisp-edges;
  transition: opacity var(--transition-premium), transform var(--transition-premium);
}

.logo:hover .logo__img {
  opacity: 0.95;
  transform: scale(1.04);
}

.logo__img--footer {
  height: 56px;
}

.nav__list {
  display: flex;
  align-items: center;
  gap: 6px;
}

.nav__link {
  font-family: var(--font-display);
  font-size: 0.88rem;
  font-weight: 600;
  color: var(--navy-mid);
  padding: 8px 16px;
  border-radius: var(--radius-full);
  transition: all var(--transition-premium);
}

.nav__link:hover {
  color: var(--primary);
  background: var(--primary-soft);
  transform: translateY(-1px);
}

.nav__link.active {
  color: var(--primary-dark);
  background: var(--accent-soft);
  box-shadow: 0 4px 15px rgba(14, 165, 233, 0.15);
  transform: translateY(-1px);
}

.header__cta {
  z-index: 1001;
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 8px;
  z-index: 1001;
}

.nav-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--navy);
  border-radius: 2px;
  transition: all var(--transition);
}

.nav-toggle.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
  opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
  transform: rotate(-45deg) translate(5px, -5px);
}

/* ---------- Hero ---------- */
.hero {
  position: relative;
  min-height: 70vh;
  display: flex;
  align-items: center;
  padding-top: var(--header-height);
  overflow: hidden;
}

.hero__bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero__image-placeholder {
  width: 100%;
  height: 100%;
  border: none;
  border-radius: 0;
  background: linear-gradient(160deg, var(--navy) 0%, var(--navy-mid) 50%, var(--navy-light) 100%);
}

.hero__bg-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  object-position: center;
}

.hero__bg-video {
  width: 100%;
  height: 100%;
  object-fit: cover;
  position: absolute;
  top: 0;
  left: 0;
  z-index: 0;
}

/* Shared real-image styling */
.media-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.hero__overlay {
  position: absolute;
  inset: 0;
  background: var(--gradient-hero);
}

.hero__floats {
  position: absolute;
  inset: 0;
  z-index: 1;
  pointer-events: none;
  transition: transform 0.15s ease-out;
  will-change: transform;
}

.float-icon {
  position: absolute;
  opacity: 0.2;
  color: var(--primary);
}

.float-icon svg {
  width: 48px;
  height: 48px;
}

.float-icon--1 { top: 20%; left: 8%; animation: float 6s ease-in-out infinite; }
.float-icon--2 { top: 60%; left: 15%; animation: float 8s ease-in-out infinite 1s; }
.float-icon--3 { top: 30%; right: 10%; animation: float 7s ease-in-out infinite 0.5s; }

@keyframes float {
  0%, 100% { transform: translateY(0) rotate(0deg); }
  50% { transform: translateY(-20px) rotate(5deg); }
}

/* ---------- Glow Orbs (Steelvex style background mesh) ---------- */
.glow-orb {
  position: absolute;
  pointer-events: none;
  z-index: 1;
  border-radius: var(--radius-full);
  filter: blur(80px);
  opacity: 0.7;
  will-change: transform, opacity;
}

.glow-orb--1 {
  width: 450px;
  height: 450px;
  background: radial-gradient(circle, rgba(14, 165, 233, 0.22) 0%, rgba(29, 92, 147, 0) 70%);
  top: 10%;
  right: -100px;
  animation: floatOrb 12s ease-in-out infinite alternate;
}

.glow-orb--2 {
  width: 500px;
  height: 500px;
  background: radial-gradient(circle, rgba(29, 92, 147, 0.18) 0%, rgba(14, 165, 233, 0) 75%);
  bottom: -150px;
  left: -150px;
  animation: floatOrb 15s ease-in-out infinite alternate-reverse;
}

@keyframes floatOrb {
  0% {
    transform: translate(0, 0) scale(1);
    opacity: 0.6;
  }
  50% {
    transform: translate(30px, -20px) scale(1.08);
    opacity: 0.8;
  }
  100% {
    transform: translate(-20px, 30px) scale(0.95);
    opacity: 0.5;
  }
}

.hero__container {
  position: relative;
  z-index: 2;
  max-width: 720px;
  padding-top: 40px;
  padding-bottom: 90px;
}

.hero__badge {
  display: inline-block;
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary-dark);
  background: var(--primary-soft);
  border: 1px solid rgba(37, 99, 235, 0.2);
  padding: 8px 18px;
  border-radius: var(--radius-full);
  margin-bottom: 24px;
}

.hero__title {
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.1;
  color: var(--white);
  margin-bottom: 16px;
  letter-spacing: -0.03em;
  text-shadow: 0 2px 10px rgba(0, 0, 0, 0.45);
}
 
.hero__subtitle {
  font-family: var(--font-display);
  font-size: clamp(1.1rem, 2vw, 1.35rem);
  font-weight: 600;
  color: #38BDF8;
  margin-bottom: 16px;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.4);
}
 
.hero__desc {
  font-size: 1.05rem;
  color: #F8FAFC;
  max-width: 560px;
  margin-bottom: 36px;
  text-shadow: 0 1px 6px rgba(0, 0, 0, 0.4);
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 16px;
}

.wave-separator {
  position: absolute;
  bottom: -1px;
  left: 0;
  right: 0;
  z-index: 3;
  line-height: 0;
}

.wave-separator svg {
  width: 100%;
  height: 80px;
}

/* ---------- Reveal Animation ---------- */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s ease, transform 0.8s ease;
}

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

.reveal--delay { transition-delay: 0.15s; }
.reveal--delay-2 { transition-delay: 0.3s; }
.reveal--delay-3 { transition-delay: 0.45s; }

/* ---------- About ---------- */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
  margin-bottom: 80px;
}

.about__visual {
  position: relative;
}

.about__image-placeholder,
.about__image {
  aspect-ratio: 4/5;
  border-radius: var(--radius-xl);
  overflow: hidden;
}

.about__image {
  box-shadow: var(--shadow-lg);
}

.about__video {
  width: 100%;
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  background: #0f172a;
}

.about__video video {
  border-radius: var(--radius-xl);
}

.about__mv {
  display: flex;
  flex-direction: column;
  gap: 24px;
  margin-top: 32px;
}

.about__mv-item {
  display: flex;
  gap: 16px;
  align-items: flex-start;
}

.about__mv-icon {
  flex-shrink: 0;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-soft);
  border-radius: var(--radius-md);
  color: var(--primary);
}

.about__mv-icon svg {
  width: 24px;
  height: 24px;
}

.about__mv-item h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 4px;
}

.about__mv-item p {
  font-size: 0.95rem;
  color: var(--gray-600);
}

.about__features-title {
  font-family: var(--font-display);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--navy);
  text-align: center;
  margin-bottom: 40px;
}

.feature-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.feature-card {
  padding: 32px 24px;
  text-align: center;
  background: var(--glass-bg);
  backdrop-filter: var(--glass-blur);
  -webkit-backdrop-filter: var(--glass-blur);
  border: 1px solid var(--glass-border);
  border-radius: var(--radius-lg);
  transition: transform var(--transition-premium), box-shadow var(--transition-premium), border-color var(--transition-premium);
}

.feature-card:hover {
  transform: translateY(-8px) scale(1.02);
  border-color: rgba(29, 92, 147, 0.25);
  box-shadow: 0 15px 35px rgba(29, 92, 147, 0.12), var(--shadow-glow);
}

.feature-card__icon {
  width: 56px;
  height: 56px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-green);
  border-radius: var(--radius-md);
  color: var(--white);
  transition: transform var(--transition-premium);
}

.feature-card__icon svg {
  width: 28px;
  height: 28px;
}

.feature-card h4 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
}

.feature-card p {
  font-size: 0.9rem;
  color: var(--gray-600);
}

/* ---------- Services ---------- */
.services {
  background: var(--primary-pale);
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  max-width: 900px;
  margin: 0 auto;
}

.service-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--gray-100);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-premium), box-shadow var(--transition-premium), border-color var(--transition-premium);
}

.service-card:hover {
  transform: translateY(-12px) scale(1.01);
  border-color: rgba(29, 92, 147, 0.22);
  box-shadow: 0 20px 45px rgba(29, 92, 147, 0.15);
}

.service-card__img {
  aspect-ratio: 16/10;
  border-radius: 0;
  border: none;
  border-bottom: 1px solid var(--gray-100);
  position: relative;
  overflow: hidden;
  background: var(--surface-cool);
}

.service-card__img .media-img,
.material-card__img .media-img {
  object-fit: cover;
  background: var(--surface-cool);
}

.service-card__img--video,
.material-card__img--video {
  aspect-ratio: auto;
  min-height: 0;
  background: #0f172a;
}

.service-card__img--video .video-frame,
.material-card__img--video .video-frame {
  width: 100%;
  border-radius: 0;
  border: none;
  box-shadow: none;
}

.service-card--portrait-media .service-card__img--video {
  max-width: 280px;
  margin: 0 auto;
}

.material-card--portrait-media .material-card__img--video {
  max-width: 320px;
  margin: 0 auto;
}

.material-card--text {
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  background: var(--primary-pale);
}

.material-card__body--full {
  padding: 32px;
}

.material-card__tag.material-card__tag--inline {
  position: relative !important;
  display: inline-block !important;
  margin-bottom: 12px;
}

.masonry--compact {
  columns: 2;
  max-width: 900px;
  margin: 0 auto;
}

@media (max-width: 640px) {
  .masonry--compact {
    columns: 1;
  }
}

.service-card--featured {
  border: 2px solid rgba(37, 99, 235, 0.25);
  box-shadow: var(--shadow-md);
}

.service-card--featured:hover {
  border-color: var(--primary-light);
}

.service-card__badge {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--white);
  background: var(--primary);
  padding: 6px 12px;
  border-radius: var(--radius-full);
}

.service-card__img .media-img,
.service-card__img video {
  transition: transform var(--transition-premium);
}

.service-card:hover .service-card__img .media-img,
.service-card:hover .service-card__img video {
  transform: scale(1.08);
}

.service-card__body {
  padding: 28px;
}

.service-card__body h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 10px;
}

.service-card__body p {
  font-size: 0.92rem;
  color: var(--gray-600);
  margin-bottom: 16px;
}

.service-card__link {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  transition: all var(--transition-premium);
}

.service-card__link:hover {
  color: var(--accent);
  gap: 10px;
}

/* ---------- Solar Panel Materials ---------- */
.materials {
  background: var(--white);
}

.materials__tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 40px;
}

.materials__tab {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 600;
  padding: 14px 32px;
  border-radius: var(--radius-full);
  border: 2px solid var(--gray-100);
  background: var(--white);
  color: var(--slate);
  transition: all var(--transition);
}

.materials__tab:hover {
  border-color: var(--primary-light);
  color: var(--primary);
}

.materials__tab.active {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--white);
  box-shadow: var(--shadow-glow);
}

.materials__panel {
  display: none;
}

.materials__panel.active {
  display: block;
}

.materials__intro {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 40px;
  font-size: 1.05rem;
  color: var(--slate);
  line-height: 1.7;
}

.materials__grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 28px;
  margin-bottom: 32px;
}

.material-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--gray-100);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-premium), box-shadow var(--transition-premium), border-color var(--transition-premium);
  height: 100%;
  display: flex;
  flex-direction: column;
}

.material-card:hover {
  transform: translateY(-6px);
  border-color: rgba(29, 92, 147, 0.22);
  box-shadow: 0 15px 35px rgba(29, 92, 147, 0.1);
}

.material-card--best {
  border-color: rgba(14, 165, 233, 0.25);
  box-shadow: var(--shadow-md);
}

.material-card--best:hover {
  border-color: var(--accent);
  box-shadow: 0 15px 35px rgba(14, 165, 233, 0.15);
}

.material-card__img {
  position: relative;
  aspect-ratio: 16/10;
  overflow: hidden;
  background: var(--surface-cool);
}

.material-card__tag {
  position: absolute;
  top: 14px;
  left: 14px;
  z-index: 2;
  font-family: var(--font-display);
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--navy);
  background: rgba(255, 255, 255, 0.92);
  padding: 6px 12px;
  border-radius: var(--radius-full);
}

.material-card__tag--best {
  background: var(--primary-soft);
  color: var(--primary-dark);
}

.material-card__body {
  padding: 28px;
  flex: 1;
  display: flex;
  flex-direction: column;
}

.material-card__body h3 {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
}

.material-card__eff {
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--primary);
  margin-bottom: 12px;
}

.material-card__body > p {
  font-size: 0.95rem;
  color: var(--slate);
  margin-bottom: 16px;
  line-height: 1.65;
}

.material-card__list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.material-card__list li {
  font-size: 0.88rem;
  color: var(--gray-600);
  padding-left: 16px;
  position: relative;
}

.material-card__list li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--primary-light);
}

.material-card__list strong {
  color: var(--navy);
}

.materials__verdict {
  padding: 32px 36px;
  margin-bottom: 48px;
  border-left: 4px solid var(--primary);
  background: var(--primary-pale);
}

.materials__verdict h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 10px;
}

.materials__verdict p {
  font-size: 0.98rem;
  color: var(--slate);
  line-height: 1.7;
}

.materials__compare {
  margin-bottom: 48px;
}

.materials__compare-title {
  font-family: var(--font-display);
  font-size: 1.35rem;
  font-weight: 700;
  color: var(--navy);
  text-align: center;
  margin-bottom: 24px;
}

.compare-table-wrap {
  overflow-x: auto;
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-100);
  box-shadow: var(--shadow-sm);
}

.compare-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 0.92rem;
}

.compare-table th,
.compare-table td {
  padding: 16px 20px;
  text-align: left;
  border-bottom: 1px solid var(--gray-100);
}

.compare-table th {
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--navy);
  background: var(--surface-warm);
}

.compare-table tbody tr:hover {
  background: var(--primary-pale);
}

.compare-table tbody tr:last-child td {
  border-bottom: none;
}

.compare-badge {
  display: inline-block;
  font-size: 0.72rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 4px 10px;
  border-radius: var(--radius-full);
}

.compare-badge--res {
  background: var(--primary-soft);
  color: var(--primary-dark);
}

.compare-badge--com {
  background: var(--accent-soft);
  color: #0369A1;
}

.materials__cta {
  text-align: center;
  padding: 40px;
  background: var(--primary-pale);
  border-radius: var(--radius-lg);
  border: 1px solid var(--primary-soft);
}

.materials__cta p {
  font-size: 1.05rem;
  color: var(--slate);
  max-width: 560px;
  margin: 0 auto 24px;
}

/* ---------- Why Solar (light) ---------- */
.why-solar {
  background: linear-gradient(180deg, var(--primary-pale) 0%, var(--white) 100%);
  color: var(--navy-mid);
  overflow: hidden;
}

.why-solar .section-tag {
  background: var(--primary-soft);
  color: var(--primary-dark);
}

.why-solar .section-title {
  color: var(--navy);
}

.why-solar .section-desc {
  color: var(--slate);
}

.benefits__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.benefit-card {
  padding: 36px 28px;
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-premium), box-shadow var(--transition-premium), border-color var(--transition-premium);
}

.benefit-card:hover {
  transform: translateY(-8px) scale(1.02);
  border-color: rgba(29, 92, 147, 0.25);
  box-shadow: 0 20px 40px rgba(29, 92, 147, 0.12), 0 5px 15px rgba(14, 165, 233, 0.08);
}

.benefit-card__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-green);
  border-radius: var(--radius-md);
  margin-bottom: 20px;
  color: var(--white);
  transition: transform var(--transition-premium);
}

.benefit-card:hover .benefit-card__icon {
  transform: scale(1.12) rotate(-8deg);
}

.benefit-card__icon svg {
  width: 28px;
  height: 28px;
}

.benefit-card h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 10px;
}

.benefit-card p {
  font-size: 0.92rem;
  color: var(--slate);
  line-height: 1.6;
}

/* ---------- Process / Timeline ---------- */
.process {
  background: var(--off-white);
  overflow: hidden;
}

.timeline {
  position: relative;
  padding: 40px 0;
}

.timeline__track {
  position: absolute;
  top: 52px;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gray-100);
  border-radius: var(--radius-full);
  z-index: 0;
}

.timeline__progress {
  height: 100%;
  width: 0;
  background: var(--gradient-green);
  border-radius: var(--radius-full);
  transition: width 2s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.timeline__steps {
  display: grid;
  grid-template-columns: repeat(6, 1fr);
  gap: 16px;
  position: relative;
  z-index: 1;
}

.timeline__step {
  text-align: center;
  padding: 0 8px;
  cursor: pointer;
}

.timeline__dot {
  width: 48px;
  height: 48px;
  margin: 0 auto 20px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--white);
  border: 3px solid var(--primary);
  border-radius: 50%;
  font-family: var(--font-display);
  font-weight: 800;
  font-size: 1rem;
  color: var(--primary);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-premium);
}

.timeline__step:hover .timeline__dot {
  background: var(--gradient-green);
  border-color: var(--accent);
  color: var(--white);
  transform: scale(1.2);
  box-shadow: 0 10px 25px rgba(14, 165, 233, 0.35), 0 0 10px rgba(29, 92, 147, 0.15);
}

.timeline__step h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 8px;
  transition: color var(--transition-premium);
}

.timeline__step:hover h3 {
  color: var(--accent);
}

.timeline__step p {
  font-size: 0.82rem;
  color: var(--gray-600);
  line-height: 1.5;
}

/* ---------- Video Showcase ---------- */
.video-showcase {
  background: var(--surface-cool);
}

.video-showcase__grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 28px;
  align-items: start;
}

.video-item {
  grid-column: span 12;
}

.video-item--landscape {
  grid-column: span 6;
}

.video-item--wide {
  grid-column: span 12;
}

.video-item--portrait {
  grid-column: span 4;
  justify-self: center;
  width: 100%;
  max-width: 400px;
}

.video-frame {
  width: 100%;
  aspect-ratio: 16 / 9;
  background: #0f172a;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--gray-100);
  box-shadow: var(--shadow-md);
}

.video-frame video {
  display: block;
  width: 100%;
  height: 100%;
  object-fit: contain;
  background: #0f172a;
}

.video-item__caption {
  padding: 16px 4px 0;
}

.video-item__caption h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 6px;
}

.video-item__caption p {
  font-size: 0.9rem;
  color: var(--slate);
  line-height: 1.55;
}

/* ---------- Photo Gallery Grid ---------- */
.gallery-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
  max-width: 1100px;
  margin: 0 auto;
}

.gallery-item {
  position: relative;
  border-radius: var(--radius-md);
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  background: var(--surface-cool);
  transition: transform var(--transition), box-shadow var(--transition);
}

.gallery-item:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-md);
}

.gallery-item__btn {
  width: 100%;
  height: 100%;
  aspect-ratio: 4/3;
  display: block;
  padding: 0;
  border: none;
  background: none;
  cursor: pointer;
  overflow: hidden;
}

.gallery-item__btn img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
  transition: transform var(--transition);
}

.gallery-item__btn:hover img {
  transform: scale(1.05);
}

/* ---------- Stats (light) ---------- */
.stats {
  position: relative;
  padding: 80px 0;
  background: var(--surface-cool);
}

.stats__bg {
  display: none;
}

.stats__grid {
  position: relative;
  z-index: 1;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 32px;
}

.stat-item {
  text-align: center;
  padding: 32px 20px;
  background: var(--white);
  border-radius: var(--radius-lg);
  border: 1px solid var(--gray-100);
  box-shadow: var(--shadow-sm);
}

.stat-item__num {
  display: block;
  font-family: var(--font-display);
  font-size: clamp(2.5rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1;
  margin-bottom: 8px;
  color: var(--primary);
}

.stat-item__label {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--slate);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ---------- Testimonials ---------- */
.testimonials {
  background: var(--off-white);
}

.testimonial-slider {
  position: relative;
  overflow: hidden;
}

.testimonial-slider__track {
  display: flex;
  transition: transform 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

.testimonial-card {
  flex: 0 0 100%;
  padding: 48px;
  text-align: center;
  max-width: 100%;
}

.testimonial-card__avatar {
  width: 80px;
  height: 80px;
  border-radius: 50%;
  margin: 0 auto 20px;
  min-height: auto;
}

.testimonial-card__stars {
  color: var(--primary-light);
  font-size: 1.2rem;
  letter-spacing: 4px;
  margin-bottom: 20px;
}

.testimonial-card blockquote {
  font-size: 1.15rem;
  font-style: italic;
  color: var(--gray-800);
  line-height: 1.7;
  max-width: 700px;
  margin: 0 auto 24px;
}

.testimonial-card cite {
  display: block;
  font-style: normal;
}

.testimonial-card cite strong {
  display: block;
  font-family: var(--font-display);
  font-size: 1.05rem;
  color: var(--navy);
  margin-bottom: 4px;
}

.testimonial-card cite span {
  font-size: 0.9rem;
  color: var(--gray-600);
}

.testimonial-slider__nav {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 20px;
  margin-top: 32px;
}

.slider-btn {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--white);
  border-radius: 50%;
  box-shadow: var(--shadow-sm);
  color: var(--navy);
  transition: all var(--transition);
}

.slider-btn:hover {
  background: var(--primary);
  color: var(--white);
  transform: scale(1.1);
}

.slider-btn svg {
  width: 20px;
  height: 20px;
}

.testimonial-slider__dots {
  display: flex;
  gap: 8px;
}

.dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--gray-200);
  transition: all var(--transition);
  cursor: pointer;
}

.dot.active {
  background: var(--primary);
  width: 28px;
  border-radius: var(--radius-full);
}

/* ---------- Partners ---------- */
.partners-slider {
  overflow: hidden;
  mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
  -webkit-mask-image: linear-gradient(90deg, transparent, #000 10%, #000 90%, transparent);
}

.partners-slider__track {
  display: flex;
  gap: 48px;
  animation: scrollLogos 25s linear infinite;
  width: max-content;
}

.partners-slider__track:hover {
  animation-play-state: paused;
}

@keyframes scrollLogos {
  to { transform: translateX(-50%); }
}

.partner-logo {
  flex-shrink: 0;
  width: 160px;
  height: 80px;
  border-radius: var(--radius-md);
  min-height: auto;
}

/* ---------- FAQ Accordion ---------- */
.faq {
  background: var(--off-white);
}

.accordion {
  max-width: 800px;
  margin: 0 auto;
}

.accordion__item {
  background: var(--white);
  border-radius: var(--radius-md);
  margin-bottom: 12px;
  box-shadow: var(--shadow-sm);
  overflow: hidden;
}

.accordion__trigger {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  padding: 22px 28px;
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 600;
  color: var(--navy);
  text-align: left;
  transition: color var(--transition);
}

.accordion__trigger:hover {
  color: var(--green);
}

.accordion__icon {
  flex-shrink: 0;
  width: 20px;
  height: 20px;
  transition: transform 0.35s ease;
}

.accordion__item.active .accordion__icon {
  transform: rotate(180deg);
}

.accordion__panel {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease, padding 0.4s ease;
}

.accordion__item.active .accordion__panel {
  max-height: 300px;
}

.accordion__panel p {
  padding: 0 28px 22px;
  font-size: 0.95rem;
  color: var(--gray-600);
  line-height: 1.7;
}

/* ---------- Contact ---------- */
.contact {
  padding: 72px 0;
}

.contact .section-header {
  margin-bottom: 40px;
}

.contact__grid {
  display: grid;
  grid-template-columns: minmax(0, 1fr) minmax(0, 1fr);
  gap: 28px;
  align-items: start;
}
 
.contact__form {
  padding: 28px;
}

.form-group {
  margin-bottom: 16px;
}

.form-group label {
  display: block;
  font-family: var(--font-display);
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--navy);
  margin-bottom: 8px;
}

.form-group label span {
  color: #e53e3e;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 14px 18px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  color: var(--gray-800);
  background: var(--white);
  border: 2px solid var(--gray-100);
  border-radius: var(--radius-md);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(37, 99, 235, 0.12);
}

.form-group input.error,
.form-group textarea.error {
  border-color: #e53e3e;
}

.form-error {
  display: block;
  font-size: 0.8rem;
  color: #e53e3e;
  margin-top: 6px;
  min-height: 18px;
}

.form-success {
  text-align: center;
  font-weight: 600;
  color: var(--primary-dark);
  margin-top: 16px;
  padding: 12px;
  background: var(--primary-soft);
  border-radius: var(--radius-md);
}

.contact__map {
  aspect-ratio: 2/1;
  border-radius: var(--radius-lg);
  margin-bottom: 16px;
  overflow: hidden;
}

.contact__details {
  padding: 24px;
}
 
.contact__detail {
  display: flex;
  gap: 16px;
  padding: 12px 0;
  border-bottom: 1px solid var(--gray-100);
}

.contact__detail:last-child {
  border-bottom: none;
}

.contact__detail-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--primary-soft);
  border-radius: var(--radius-md);
  color: var(--primary);
}

.contact__detail-icon svg {
  width: 22px;
  height: 22px;
}

.contact__detail h3 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 4px;
}

.contact__detail p {
  font-size: 0.9rem;
  color: var(--gray-600);
  line-height: 1.6;
}

.contact__detail a:hover {
  color: var(--green);
}

/* ---------- Digital Business Card (V. Card) ---------- */
.contact__vcard-wrapper {
  margin-top: 24px;
  padding: 28px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.contact__vcard-header {
  display: flex;
  gap: 16px;
  align-items: center;
}

.contact__vcard-icon {
  flex-shrink: 0;
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--accent-soft);
  border-radius: var(--radius-md);
  color: var(--accent);
}

.contact__vcard-icon svg {
  width: 22px;
  height: 22px;
}

.contact__vcard-header h3 {
  font-family: var(--font-display);
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 4px;
}

.contact__vcard-header p {
  font-size: 0.85rem;
  color: var(--slate);
}

.contact__vcard-preview {
  display: flex;
  gap: 24px;
  align-items: center;
  flex-wrap: wrap;
}

.contact__vcard-link {
  flex: 0 0 180px;
  width: 180px;
  max-width: 100%;
  aspect-ratio: 1.58 / 1;
  border-radius: var(--radius-sm);
  border: 1px solid var(--gray-100);
  position: relative;
  overflow: hidden;
  box-shadow: var(--shadow-sm);
  transition: transform var(--transition-premium), box-shadow var(--transition-premium), border-color var(--transition-premium);
}

.contact__vcard-link:hover {
  transform: translateY(-4px) scale(1.03);
  border-color: var(--accent-light);
  box-shadow: var(--shadow-md);
}

.contact__vcard-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.contact__vcard-overlay {
  position: absolute;
  inset: 0;
  background: rgba(15, 23, 42, 0.65);
  opacity: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: opacity var(--transition-premium);
}

.contact__vcard-link:hover .contact__vcard-overlay {
  opacity: 1;
}

.contact__vcard-overlay span {
  color: var(--white);
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  border: 1.5px solid var(--white);
  padding: 4px 10px;
  border-radius: var(--radius-full);
  white-space: nowrap;
}

.contact__vcard-actions {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 12px;
  min-width: 160px;
}

.contact__vcard-actions .btn {
  width: 100%;
  justify-content: center;
}

/* ---------- CTA Section ---------- */
.cta-section {
  position: relative;
  padding: 100px 0;
  text-align: center;
  overflow: hidden;
}

.cta-section__bg {
  position: absolute;
  inset: 0;
  background: var(--gradient-cta);
}

.cta-section__content {
  position: relative;
  z-index: 1;
}

.cta-section h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  color: var(--navy);
  margin-bottom: 16px;
}

.cta-section p {
  font-size: 1.15rem;
  color: var(--slate);
  max-width: 560px;
  margin: 0 auto 32px;
}

/* ---------- Footer (light) ---------- */
.footer {
  background: var(--surface-cool);
  color: var(--slate);
  padding: 80px 0 0;
  border-top: 1px solid var(--gray-100);
}

.footer__grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.2fr;
  gap: 48px;
  padding-bottom: 48px;
  border-bottom: 1px solid var(--gray-100);
}

.footer__brand p {
  font-size: 0.92rem;
  margin: 16px 0 24px;
  line-height: 1.7;
}

.footer__social {
  display: flex;
  gap: 12px;
}

.footer__social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-sm);
  color: var(--navy-mid);
  transition: all var(--transition);
}

.footer__social a:hover {
  background: var(--primary);
  border-color: var(--primary);
  color: var(--white);
  transform: translateY(-3px);
}

.footer__social svg {
  width: 18px;
  height: 18px;
}

.footer__links h3,
.footer__newsletter h3 {
  font-family: var(--font-display);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--navy);
  margin-bottom: 20px;
}

.footer__links ul {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer__links a {
  font-size: 0.9rem;
  transition: color var(--transition), padding-left var(--transition);
}

.footer__links a:hover {
  color: var(--primary);
  padding-left: 6px;
}

.footer__newsletter p {
  font-size: 0.9rem;
  margin-bottom: 16px;
}

.newsletter-form {
  display: flex;
  gap: 8px;
}

.newsletter-form input {
  flex: 1;
  padding: 12px 16px;
  font-size: 0.9rem;
  background: var(--white);
  border: 1px solid var(--gray-100);
  border-radius: var(--radius-full);
  color: var(--navy-mid);
  outline: none;
  transition: border-color var(--transition);
}

.newsletter-form input::placeholder {
  color: var(--slate-light);
}

.newsletter-form input:focus {
  border-color: var(--primary-light);
}

.footer__bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 24px 0;
  font-size: 0.85rem;
}


/* ---------- Back to Top ---------- */
.back-to-top {
  position: fixed;
  bottom: 32px;
  right: 32px;
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--gradient-green);
  color: var(--white);
  border-radius: 50%;
  box-shadow: var(--shadow-glow);
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all var(--transition);
}

.back-to-top.visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 40px rgba(37, 99, 235, 0.35);
}

.back-to-top svg {
  width: 22px;
  height: 22px;
}

/* ---------- Lightbox ---------- */
.lightbox {
  position: fixed;
  inset: 0;
  z-index: 9000;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(30, 58, 95, 0.75);
  backdrop-filter: blur(8px);
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition);
}

.lightbox.active {
  opacity: 1;
  visibility: visible;
}

.lightbox__close {
  position: absolute;
  top: 24px;
  right: 24px;
  font-size: 2.5rem;
  color: var(--white);
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition);
}

.lightbox__close:hover {
  transform: rotate(90deg);
}

.lightbox__content {
  max-width: min(92vw, 1100px);
  max-height: 90vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 12px;
}

.lightbox__photo {
  max-width: 100%;
  max-height: calc(90vh - 48px);
  width: auto;
  height: auto;
  object-fit: contain;
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}

.lightbox__caption {
  color: var(--white);
  font-family: var(--font-display);
  font-size: 0.95rem;
  text-align: center;
  opacity: 0.9;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */

@media (max-width: 1100px) {
  .feature-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .timeline__steps {
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
  }

  .timeline__track {
    display: none;
  }

  .footer__grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 992px) {
  .nav {
    position: fixed;
    top: 0;
    right: 0;
    width: 300px;
    height: 100vh;
    background: var(--white);
    padding: 100px 32px 32px;
    transform: translateX(100%);
    transition: transform var(--transition);
    box-shadow: -10px 0 40px rgba(30, 58, 95, 0.1);
  }

  .nav.open {
    transform: translateX(0);
  }

  .nav__list {
    flex-direction: column;
    align-items: flex-start;
    gap: 4px;
  }

  .nav__link {
    font-size: 1rem;
    padding: 12px 16px;
    width: 100%;
  }

  .nav-toggle {
    display: flex;
  }

  .header__cta {
    display: none;
  }

  .hero__container {
    text-align: center;
    margin-left: auto;
    margin-right: auto;
  }

  .hero__desc {
    margin-left: auto;
    margin-right: auto;
  }

  .hero__actions {
    justify-content: center;
  }

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

  .services__grid {
    grid-template-columns: repeat(2, 1fr);
  }

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

  .video-item--landscape,
  .video-item--portrait,
  .video-item--wide {
    grid-column: span 12;
    max-width: none;
    justify-self: stretch;
  }

  .benefits__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .stats__grid {
    grid-template-columns: repeat(2, 1fr);
    gap: 40px;
  }

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

  .gallery-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 640px) {
  .logo__img {
    height: 40px;
  }

  .section {
    padding: 72px 0;
  }

  .section-header {
    margin-bottom: 40px;
  }

  .hero__container {
    padding-bottom: 100px;
  }

  .feature-grid,
  .services__grid,
  .benefits__grid {
    grid-template-columns: 1fr;
  }

  .materials__tabs {
    flex-direction: column;
    align-items: stretch;
  }

  .materials__tab {
    text-align: center;
  }

  .compare-table th,
  .compare-table td {
    padding: 12px 14px;
    font-size: 0.82rem;
  }

  .timeline__steps {
    grid-template-columns: 1fr;
    gap: 24px;
  }

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

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

  .footer__grid {
    grid-template-columns: 1fr;
    gap: 32px;
  }

  .footer__bottom {
    flex-direction: column;
    gap: 8px;
    text-align: center;
  }

  .newsletter-form {
    flex-direction: column;
  }

  .testimonial-card {
    padding: 32px 20px;
  }

  .contact__form {
    padding: 28px 20px;
  }

  .back-to-top {
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
  }
}

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }

  .reveal {
    opacity: 1;
    transform: none;
  }
}