/* ============================================
   HZ Software Development — Landing Page CSS
   Design System & Variables
   ============================================ */

/* ---------- Google Fonts ---------- */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&display=swap');

/* ---------- CSS Custom Properties ---------- */
:root {
  /* Colors */
  --clr-bg-primary: #0a0a0a;
  --clr-bg-secondary: #111111;
  --clr-bg-card: #1a1a1a;
  --clr-bg-card-hover: #222222;
  --clr-accent: #00aaff;
  --clr-accent-dark: #0088cc;
  --clr-accent-glow: rgba(0, 170, 255, 0.15);
  --clr-accent-glow-strong: rgba(0, 170, 255, 0.3);
  --clr-text-primary: #f0f0f0;
  --clr-text-secondary: #a0a0a0;
  --clr-text-muted: #666666;
  --clr-border: rgba(255, 255, 255, 0.06);
  --clr-border-hover: rgba(0, 170, 255, 0.3);
  --clr-white: #ffffff;

  /* Typography */
  --ff-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --fw-light: 300;
  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;
  --fw-bold: 700;
  --fw-extrabold: 800;

  /* Spacing */
  --space-xs: 0.5rem;
  --space-sm: 1rem;
  --space-md: 1.5rem;
  --space-lg: 2rem;
  --space-xl: 3rem;
  --space-2xl: 4rem;
  --space-3xl: 6rem;
  --space-4xl: 8rem;

  /* Layout */
  --max-width: 1200px;
  --header-height: 80px;

  /* Radius */
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-full: 9999px;

  /* Shadows */
  --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.4);
  --shadow-card-hover: 0 8px 40px rgba(0, 0, 0, 0.6);
  --shadow-glow: 0 0 30px rgba(0, 170, 255, 0.15);
  --shadow-btn: 0 4px 20px rgba(0, 170, 255, 0.3);

  /* Transitions */
  --transition-fast: 0.2s ease;
  --transition-base: 0.3s ease;
  --transition-slow: 0.5s ease;
  --transition-smooth: 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

/* ============================================
   Reset & Base
   ============================================ */

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

html {
  scroll-behavior: smooth;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--ff-primary);
  font-weight: var(--fw-regular);
  background-color: var(--clr-bg-primary);
  color: var(--clr-text-primary);
  line-height: 1.7;
  overflow-x: hidden;
}

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

ul, ol {
  list-style: none;
}

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

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

/* ---------- Utility ---------- */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.section-padding {
  padding: var(--space-4xl) 0;
}

.section-label {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.8rem;
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: 3px;
  color: var(--clr-accent);
  margin-bottom: var(--space-md);
}

.section-label::before {
  content: '';
  display: inline-block;
  width: 24px;
  height: 2px;
  background: var(--clr-accent);
  border-radius: 1px;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: var(--fw-bold);
  line-height: 1.2;
  color: var(--clr-white);
  margin-bottom: var(--space-md);
}

.section-subtitle {
  font-size: 1.1rem;
  color: var(--clr-text-secondary);
  max-width: 600px;
  line-height: 1.8;
}

/* ============================================
   Scroll Reveal Animations
   ============================================ */
.reveal {
  opacity: 0;
  transform: translateY(40px);
  transition: opacity 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94),
              transform 0.8s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

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

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

/* ============================================
   HEADER / NAVBAR
   ============================================ */
.header {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: var(--header-height);
  z-index: 1000;
  transition: background-color var(--transition-base),
              box-shadow var(--transition-base),
              backdrop-filter var(--transition-base);
}

.header.scrolled {
  background-color: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(20px) saturate(180%);
  -webkit-backdrop-filter: blur(20px) saturate(180%);
  box-shadow: 0 1px 0 var(--clr-border),
              0 4px 20px rgba(0, 0, 0, 0.3);
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-xs);
  z-index: 1001;
}

.header__logo img {
  height: 60px;
  width: auto;
  border-radius: var(--radius-sm);
}

.header__nav {
  display: flex;
  align-items: center;
  gap: var(--space-xl);
}

.header__menu {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.header__menu a {
  font-size: 0.9rem;
  font-weight: var(--fw-medium);
  color: var(--clr-text-secondary);
  position: relative;
  padding: var(--space-xs) 0;
  transition: color var(--transition-fast);
}

.header__menu a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--clr-accent);
  border-radius: 1px;
  transition: width var(--transition-base);
}

.header__menu a:hover {
  color: var(--clr-white);
}

.header__menu a:hover::after {
  width: 100%;
}

/* ---------- CTA Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  padding: 0.75rem 1.75rem;
  font-size: 0.9rem;
  font-weight: var(--fw-semibold);
  border-radius: var(--radius-full);
  transition: all var(--transition-base);
  white-space: nowrap;
}

.btn-primary {
  background: var(--clr-accent);
  color: var(--clr-bg-primary);
  box-shadow: var(--shadow-btn);
}

.btn-primary:hover {
  background: var(--clr-accent-dark);
  box-shadow: 0 6px 30px rgba(0, 170, 255, 0.4);
  transform: translateY(-2px);
}

.btn-secondary {
  background: transparent;
  color: var(--clr-text-primary);
  border: 1px solid var(--clr-border);
}

.btn-secondary:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
  background: var(--clr-accent-glow);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 0.6rem 1.4rem;
  font-size: 0.85rem;
}

/* ---------- Mobile Menu Toggle ---------- */
.header__toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 28px;
  height: 28px;
  z-index: 1001;
  cursor: pointer;
}

.header__toggle span {
  display: block;
  width: 100%;
  height: 2px;
  background: var(--clr-text-primary);
  border-radius: 2px;
  transition: all var(--transition-base);
}

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

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

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

/* ============================================
   HERO SECTION
   ============================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  overflow: hidden;
  padding-top: var(--header-height);
}

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

.hero__bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.25;
}

.hero__bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    rgba(10, 10, 10, 0.3) 0%,
    rgba(10, 10, 10, 0.6) 50%,
    var(--clr-bg-primary) 100%
  );
}

/* Animated floating particles */
.hero__particles {
  position: absolute;
  inset: 0;
  z-index: 0;
  overflow: hidden;
}

.particle {
  position: absolute;
  width: 3px;
  height: 3px;
  background: var(--clr-accent);
  border-radius: 50%;
  opacity: 0.3;
  animation: float-particle linear infinite;
}

@keyframes float-particle {
  0% {
    transform: translateY(100vh) scale(0);
    opacity: 0;
  }
  10% {
    opacity: 0.3;
  }
  90% {
    opacity: 0.3;
  }
  100% {
    transform: translateY(-10vh) scale(1);
    opacity: 0;
  }
}

.hero__content {
  position: relative;
  z-index: 1;
  max-width: 750px;
}

.hero__badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  background: var(--clr-accent-glow);
  border: 1px solid rgba(0, 170, 255, 0.2);
  color: var(--clr-accent);
  font-size: 0.8rem;
  font-weight: var(--fw-semibold);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  margin-bottom: var(--space-lg);
  letter-spacing: 1px;
  text-transform: uppercase;
}

.hero__badge i {
  font-size: 0.7rem;
}

.hero__title {
  font-size: clamp(2.5rem, 5.5vw, 4.2rem);
  font-weight: var(--fw-extrabold);
  line-height: 1.1;
  color: var(--clr-white);
  margin-bottom: var(--space-md);
  letter-spacing: -1px;
}

.hero__title .accent {
  background: linear-gradient(135deg, var(--clr-accent), #66ccff);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero__subtitle {
  font-size: 1.15rem;
  color: var(--clr-text-secondary);
  margin-bottom: var(--space-xl);
  max-width: 560px;
  line-height: 1.8;
}

.hero__actions {
  display: flex;
  gap: var(--space-sm);
  flex-wrap: wrap;
}

.hero__stats {
  display: flex;
  gap: var(--space-2xl);
  margin-top: var(--space-3xl);
  padding-top: var(--space-xl);
  border-top: 1px solid var(--clr-border);
}

.hero__stat-number {
  font-size: 2rem;
  font-weight: var(--fw-bold);
  color: var(--clr-white);
  line-height: 1;
}

.hero__stat-number .accent {
  color: var(--clr-accent);
}

.hero__stat-label {
  font-size: 0.85rem;
  color: var(--clr-text-muted);
  margin-top: 0.3rem;
}

/* ============================================
   SERVICES SECTION
   ============================================ */
.services {
  background: var(--clr-bg-primary);
  position: relative;
}

.services__header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.services__header .section-subtitle {
  margin: 0 auto;
}

.services__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-lg);
}

.service-card {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: all var(--transition-smooth);
  position: relative;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: linear-gradient(90deg, transparent, var(--clr-accent), transparent);
  opacity: 0;
  transition: opacity var(--transition-base);
}

.service-card:hover {
  background: var(--clr-bg-card-hover);
  border-color: var(--clr-border-hover);
  transform: translateY(-6px);
  box-shadow: var(--shadow-card-hover), var(--shadow-glow);
}

.service-card:hover::before {
  opacity: 1;
}

.service-card__icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--clr-accent-glow);
  border: 1px solid rgba(0, 170, 255, 0.15);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-md);
  font-size: 1.4rem;
  color: var(--clr-accent);
  transition: all var(--transition-base);
}

.service-card:hover .service-card__icon {
  background: var(--clr-accent-glow-strong);
  border-color: var(--clr-accent);
  box-shadow: 0 0 20px rgba(0, 170, 255, 0.2);
}

.service-card__title {
  font-size: 1.15rem;
  font-weight: var(--fw-semibold);
  color: var(--clr-white);
  margin-bottom: var(--space-xs);
}

.service-card__desc {
  font-size: 0.9rem;
  color: var(--clr-text-secondary);
  line-height: 1.7;
}

/* ============================================
   ABOUT SECTION
   ============================================ */
.about {
  background: var(--clr-bg-secondary);
  position: relative;
  overflow: hidden;
}

.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.about__image-wrapper {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
}

.about__image-wrapper img {
  width: 100%;
  border-radius: var(--radius-lg);
  object-fit: cover;
  aspect-ratio: 4/3;
}

.about__image-wrapper::after {
  content: '';
  position: absolute;
  inset: 0;
  border-radius: var(--radius-lg);
  border: 1px solid var(--clr-border);
  pointer-events: none;
}

.about__floating-badge {
  position: absolute;
  bottom: var(--space-lg);
  right: var(--space-lg);
  background: rgba(10, 10, 10, 0.85);
  backdrop-filter: blur(16px);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: var(--space-sm) var(--space-md);
  display: flex;
  align-items: center;
  gap: var(--space-sm);
}

.about__floating-badge i {
  color: var(--clr-accent);
  font-size: 1.3rem;
}

.about__floating-badge-text span {
  display: block;
  font-size: 1.2rem;
  font-weight: var(--fw-bold);
  color: var(--clr-white);
  line-height: 1.2;
}

.about__floating-badge-text small {
  font-size: 0.75rem;
  color: var(--clr-text-muted);
}

.about__content .section-subtitle {
  margin-bottom: var(--space-xl);
}

.about__features {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.about__feature {
  display: flex;
  gap: var(--space-md);
  align-items: flex-start;
}

.about__feature-icon {
  width: 44px;
  height: 44px;
  min-width: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--clr-accent-glow);
  border: 1px solid rgba(0, 170, 255, 0.12);
  border-radius: var(--radius-sm);
  color: var(--clr-accent);
  font-size: 1rem;
}

.about__feature-text h4 {
  font-size: 1rem;
  font-weight: var(--fw-semibold);
  color: var(--clr-white);
  margin-bottom: 0.2rem;
}

.about__feature-text p {
  font-size: 0.88rem;
  color: var(--clr-text-secondary);
  line-height: 1.6;
}

/* ============================================
   CLIENTS / CASES SECTION
   ============================================ */
.clients {
  background: var(--clr-bg-primary);
  position: relative;
}

.clients__header {
  text-align: center;
  margin-bottom: var(--space-3xl);
}

.clients__header .section-subtitle {
  margin: 0 auto;
}

.clients__logos {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2xl);
  flex-wrap: wrap;
  padding: var(--space-xl) 0;
}

.client-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 160px;
  height: 80px;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-md);
  padding: var(--space-sm);
  transition: all var(--transition-base);
  position: relative;
  overflow: hidden;
}

.client-logo:hover {
  border-color: var(--clr-border-hover);
  box-shadow: var(--shadow-glow);
  transform: translateY(-4px);
}

.client-logo span {
  font-size: 0.9rem;
  font-weight: var(--fw-semibold);
  color: var(--clr-text-muted);
  letter-spacing: 2px;
  text-transform: uppercase;
  transition: color var(--transition-base);
}

.client-logo:hover span {
  color: var(--clr-accent);
}

.clients__testimonial {
  max-width: 700px;
  margin: var(--space-3xl) auto 0;
  text-align: center;
  position: relative;
}

.clients__testimonial blockquote {
  font-size: 1.15rem;
  font-style: italic;
  color: var(--clr-text-secondary);
  line-height: 1.8;
  margin-bottom: var(--space-md);
  position: relative;
}

.clients__testimonial blockquote::before {
  content: '"';
  font-size: 4rem;
  color: var(--clr-accent);
  opacity: 0.3;
  position: absolute;
  top: -1.5rem;
  left: -1rem;
  font-family: Georgia, serif;
}

.clients__testimonial cite {
  font-style: normal;
  font-size: 0.9rem;
  color: var(--clr-text-muted);
}

.clients__testimonial cite strong {
  color: var(--clr-white);
  font-weight: var(--fw-semibold);
}

/* ============================================
   CONTACT SECTION
   ============================================ */
.contact {
  background: var(--clr-bg-secondary);
  position: relative;
}

.contact__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
}

.contact__info {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.contact__info .section-subtitle {
  margin-bottom: var(--space-xl);
}

.contact__details {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
  margin-bottom: var(--space-xl);
}

.contact__detail {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.contact__detail-icon {
  width: 48px;
  height: 48px;
  min-width: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--clr-accent-glow);
  border: 1px solid rgba(0, 170, 255, 0.12);
  border-radius: var(--radius-sm);
  color: var(--clr-accent);
  font-size: 1.1rem;
}

.contact__detail-text span {
  display: block;
  font-size: 0.8rem;
  color: var(--clr-text-muted);
  text-transform: uppercase;
  letter-spacing: 1px;
  margin-bottom: 0.15rem;
}

.contact__detail-text a,
.contact__detail-text p {
  font-size: 1rem;
  color: var(--clr-text-primary);
  font-weight: var(--fw-medium);
}

.contact__detail-text a:hover {
  color: var(--clr-accent);
}

.contact__social {
  display: flex;
  gap: var(--space-sm);
}

.contact__social a {
  width: 44px;
  height: 44px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  color: var(--clr-text-secondary);
  font-size: 1.1rem;
  transition: all var(--transition-base);
}

.contact__social a:hover {
  background: var(--clr-accent-glow);
  border-color: var(--clr-accent);
  color: var(--clr-accent);
  transform: translateY(-3px);
}

/* ---------- Contact Form ---------- */
.contact__form-wrapper {
  background: var(--clr-bg-card);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
}

.contact__form {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.4rem;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-md);
}

.form-group label {
  font-size: 0.85rem;
  font-weight: var(--fw-medium);
  color: var(--clr-text-secondary);
}

.form-group input,
.form-group textarea,
.form-group select {
  width: 100%;
  padding: 0.85rem 1rem;
  font-family: var(--ff-primary);
  font-size: 0.95rem;
  color: var(--clr-text-primary);
  background: var(--clr-bg-primary);
  border: 1px solid var(--clr-border);
  border-radius: var(--radius-sm);
  outline: none;
  transition: all var(--transition-fast);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
  color: var(--clr-text-muted);
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
  border-color: var(--clr-accent);
  box-shadow: 0 0 0 3px var(--clr-accent-glow);
}

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

.form-group select {
  appearance: none;
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%23666666' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 1rem center;
}

.form-group select option {
  background: var(--clr-bg-card);
  color: var(--clr-text-primary);
}

.contact__form .btn-primary {
  width: 100%;
  padding: 1rem;
  font-size: 1rem;
}

/* ============================================
   FOOTER
   ============================================ */
.footer {
  background: var(--clr-bg-primary);
  border-top: 1px solid var(--clr-border);
  padding: var(--space-3xl) 0 var(--space-lg);
}

.footer__grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer__brand img {
  height: 60px;
  margin-bottom: var(--space-md);
  border-radius: var(--radius-sm);
}

.footer__brand p {
  font-size: 0.9rem;
  color: var(--clr-text-secondary);
  line-height: 1.7;
  max-width: 300px;
  margin-bottom: var(--space-md);
}

.footer__brand-domain {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  font-size: 0.85rem;
  color: var(--clr-accent);
  font-weight: var(--fw-medium);
}

.footer__col h4 {
  font-size: 0.85rem;
  font-weight: var(--fw-semibold);
  text-transform: uppercase;
  letter-spacing: 2px;
  color: var(--clr-text-muted);
  margin-bottom: var(--space-md);
}

.footer__col ul li {
  margin-bottom: var(--space-xs);
}

.footer__col ul li a {
  font-size: 0.9rem;
  color: var(--clr-text-secondary);
  transition: color var(--transition-fast);
}

.footer__col ul li a:hover {
  color: var(--clr-accent);
}

.footer__bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-lg);
  border-top: 1px solid var(--clr-border);
}

.footer__bottom p {
  font-size: 0.8rem;
  color: var(--clr-text-muted);
}

.footer__bottom-links {
  display: flex;
  gap: var(--space-lg);
}

.footer__bottom-links a {
  font-size: 0.8rem;
  color: var(--clr-text-muted);
  transition: color var(--transition-fast);
}

.footer__bottom-links a:hover {
  color: var(--clr-accent);
}

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

/* Tablets */
@media (max-width: 1024px) {
  .services__grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .about__grid {
    gap: var(--space-2xl);
  }

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

/* Mobile */
@media (max-width: 768px) {
  :root {
    --header-height: 70px;
  }

  .section-padding {
    padding: var(--space-3xl) 0;
  }

  .container {
    padding: 0 var(--space-md);
  }

  /* Header Mobile */
  .header__toggle {
    display: flex;
  }

  .header__nav {
    position: fixed;
    top: 0;
    right: -100%;
    width: 80%;
    max-width: 360px;
    height: 100vh;
    background: rgba(17, 17, 17, 0.98);
    backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: flex-start;
    justify-content: center;
    padding: var(--space-2xl);
    gap: var(--space-xl);
    transition: right var(--transition-smooth);
    box-shadow: -10px 0 30px rgba(0, 0, 0, 0.5);
  }

  .header__nav.open {
    right: 0;
  }

  .header__menu {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-md);
  }

  .header__menu a {
    font-size: 1.2rem;
  }

  /* Hero Mobile */
  .hero__title {
    font-size: clamp(2rem, 8vw, 3rem);
  }

  .hero__stats {
    gap: var(--space-lg);
    flex-wrap: wrap;
  }

  .hero__stat-number {
    font-size: 1.6rem;
  }

  /* Services Mobile */
  .services__grid {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }

  /* About Mobile */
  .about__grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .about__image-wrapper {
    order: -1;
  }

  /* Clients Mobile */
  .clients__logos {
    gap: var(--space-md);
  }

  .client-logo {
    width: 130px;
    height: 65px;
  }

  /* Contact Mobile */
  .contact__grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .form-row {
    grid-template-columns: 1fr;
  }

  /* Footer Mobile */
  .footer__grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .footer__bottom {
    flex-direction: column;
    gap: var(--space-sm);
    text-align: center;
  }
}

@media (max-width: 480px) {
  .hero__actions {
    flex-direction: column;
  }

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

  .hero__stats {
    flex-direction: column;
    gap: var(--space-md);
  }
}

/* ============================================
   Mobile menu overlay
   ============================================ */
.mobile-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.6);
  z-index: 999;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--transition-base);
}

.mobile-overlay.active {
  opacity: 1;
  pointer-events: all;
}

/* ============================================
   Scrollbar
   ============================================ */
::-webkit-scrollbar {
  width: 8px;
}

::-webkit-scrollbar-track {
  background: var(--clr-bg-primary);
}

::-webkit-scrollbar-thumb {
  background: var(--clr-bg-card);
  border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--clr-text-muted);
}

/* ============================================
   Loading Screen
   ============================================ */
.loader {
  position: fixed;
  inset: 0;
  background: var(--clr-bg-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 9999;
  transition: opacity 0.6s ease, visibility 0.6s ease;
}

.loader.hidden {
  opacity: 0;
  visibility: hidden;
}

.loader__content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-md);
}

.loader__logo {
  height: 80px;
  animation: pulse-logo 1.5s ease-in-out infinite;
}

@keyframes pulse-logo {
  0%, 100% { opacity: 0.4; transform: scale(0.95); }
  50% { opacity: 1; transform: scale(1); }
}

.loader__bar {
  width: 120px;
  height: 2px;
  background: var(--clr-bg-card);
  border-radius: 1px;
  overflow: hidden;
}

.loader__bar-inner {
  width: 40%;
  height: 100%;
  background: var(--clr-accent);
  border-radius: 1px;
  animation: loader-progress 1.2s ease-in-out infinite;
}

@keyframes loader-progress {
  0% { transform: translateX(-100%); }
  100% { transform: translateX(350%); }
}