/* ============================================
   NEXUS DIGITAL — Premium Dark Design System
   ============================================ */

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

/* ── Design Tokens ─────────────────────────── */
:root {
  /* Colors */
  --primary:        hsl(220, 90%, 56%);
  --primary-light:  hsl(220, 90%, 70%);
  --primary-dark:   hsl(220, 90%, 40%);
  --accent:         hsl(160, 84%, 44%);
  --accent-light:   hsl(160, 70%, 60%);
  --bg:             hsl(225, 25%, 8%);
  --surface:        hsl(225, 20%, 12%);
  --surface-2:      hsl(225, 18%, 16%);
  --surface-3:      hsl(225, 15%, 20%);
  --text:           hsl(220, 20%, 95%);
  --text-muted:     hsl(220, 15%, 65%);
  --border:         hsl(225, 15%, 20%);

  /* Gradients & Effects */
  --gradient-primary: linear-gradient(135deg, hsl(220, 90%, 56%), hsl(260, 80%, 60%));
  --gradient-accent:  linear-gradient(135deg, hsl(160, 84%, 44%), hsl(190, 80%, 50%));
  --gradient-cta:     linear-gradient(135deg, hsl(220, 90%, 56%) 0%, hsl(260, 80%, 60%) 50%, hsl(300, 70%, 55%) 100%);
  --glow:             0 0 30px hsla(220, 90%, 56%, 0.3);
  --glow-accent:      0 0 30px hsla(160, 84%, 44%, 0.25);

  /* Typography */
  --font: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  /* Spacing */
  --section-pad: clamp(4rem, 10vw, 8rem) clamp(1rem, 5vw, 6rem);
  --radius:      12px;
  --radius-lg:   20px;

  /* Transitions */
  --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

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

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

ul, ol {
  list-style: none;
}

button, input, textarea, select {
  font: inherit;
  color: inherit;
  border: none;
  background: none;
}

/* ── Scrollbar ─────────────────────────────── */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: var(--surface-3);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--primary-dark);
}

/* Firefox */
html {
  scrollbar-width: thin;
  scrollbar-color: var(--surface-3) var(--bg);
}

/* ── Utility ───────────────────────────────── */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 3rem);
}

.section-badge {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.4rem 1rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--primary-light);
  background: hsla(220, 90%, 56%, 0.1);
  border: 1px solid hsla(220, 90%, 56%, 0.2);
  border-radius: 100px;
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.15;
  margin-bottom: 1rem;
}

.section-subtitle {
  font-size: clamp(1rem, 1.5vw, 1.2rem);
  color: var(--text-muted);
  max-width: 600px;
  line-height: 1.7;
}

.gradient-text {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

/* ── Navigation ────────────────────────────── */
.navbar {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  z-index: 1000;
  padding: 1rem 0;
  transition: background 0.4s var(--ease-out), box-shadow 0.4s var(--ease-out);
}

.navbar.scrolled {
  background: hsla(225, 25%, 8%, 0.85);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  box-shadow: 0 1px 0 hsla(220, 15%, 50%, 0.1);
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 clamp(1rem, 4vw, 3rem);
}

.nav-logo {
  font-size: 1.35rem;
  font-weight: 800;
  display: flex;
  align-items: center;
  gap: 0.35rem;
}

.nav-logo .bracket {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  font-weight: 300;
  font-size: 1.5rem;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-muted);
  position: relative;
  padding: 0.25rem 0;
  transition: color 0.3s;
}

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--gradient-primary);
  border-radius: 1px;
  transition: width 0.3s var(--ease-out);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--text);
}

.nav-links a:hover::after,
.nav-links a.active::after {
  width: 100%;
}

.nav-cta {
  padding: 0.55rem 1.3rem !important;
  background: var(--gradient-primary);
  border-radius: 8px;
  color: white !important;
  font-weight: 600 !important;
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s !important;
}

.nav-cta::after {
  display: none !important;
}

.nav-cta:hover {
  transform: translateY(-1px);
  box-shadow: var(--glow);
}

/* Hamburger */
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  cursor: pointer;
  padding: 0.5rem;
  z-index: 1001;
  background: none;
  border: none;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform 0.3s, opacity 0.3s;
}

.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);
}

/* ── Hero Section ──────────────────────────── */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: clamp(6rem, 12vw, 10rem) 0 clamp(4rem, 8vw, 6rem);
  overflow: hidden;
}

/* Grid pattern overlay */
.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(hsla(220, 15%, 50%, 0.05) 1px, transparent 1px),
    linear-gradient(90deg, hsla(220, 15%, 50%, 0.05) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 30%, transparent 80%);
  -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 30%, transparent 80%);
  pointer-events: none;
}

/* Glowing orb */
.hero-glow {
  position: absolute;
  width: 600px;
  height: 600px;
  border-radius: 50%;
  background: radial-gradient(circle, hsla(220, 90%, 56%, 0.15) 0%, hsla(260, 80%, 60%, 0.08) 40%, transparent 70%);
  top: 10%;
  right: -10%;
  animation: float 8s ease-in-out infinite;
  pointer-events: none;
}

.hero-glow-2 {
  position: absolute;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, hsla(160, 84%, 44%, 0.1) 0%, transparent 70%);
  bottom: 10%;
  left: -5%;
  animation: float 10s ease-in-out infinite reverse;
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 2;
  max-width: 750px;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.45rem 1.1rem;
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--accent);
  background: hsla(160, 84%, 44%, 0.08);
  border: 1px solid hsla(160, 84%, 44%, 0.2);
  border-radius: 100px;
  margin-bottom: 1.5rem;
}

.hero h1 {
  font-size: clamp(2.5rem, 5.5vw, 4.2rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 1.5rem;
  letter-spacing: -0.02em;
}

.hero h1 .highlight {
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.hero-subtitle {
  font-size: clamp(1.05rem, 1.5vw, 1.25rem);
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 2.5rem;
  max-width: 600px;
}

.hero-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  background: var(--gradient-primary);
  color: white;
  font-weight: 600;
  font-size: 1rem;
  border-radius: 10px;
  cursor: pointer;
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s;
  border: none;
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 40px hsla(220, 90%, 56%, 0.35);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.85rem 2rem;
  background: transparent;
  color: var(--text);
  font-weight: 600;
  font-size: 1rem;
  border-radius: 10px;
  border: 1.5px solid var(--border);
  cursor: pointer;
  transition: border-color 0.3s, background 0.3s, transform 0.3s var(--ease-out);
}

.btn-outline:hover {
  border-color: var(--primary);
  background: hsla(220, 90%, 56%, 0.06);
  transform: translateY(-2px);
}

/* ── Services Section ──────────────────────── */
.services {
  padding: var(--section-pad);
}

.services-header {
  text-align: center;
  margin-bottom: 4rem;
}

.services-header .section-subtitle {
  margin: 0 auto;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.service-card {
  position: relative;
  padding: 2.5rem 2rem;
  background: hsla(225, 20%, 14%, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid hsla(220, 15%, 50%, 0.1);
  border-radius: var(--radius-lg);
  transition: transform 0.4s var(--ease-out), border-color 0.4s, box-shadow 0.4s;
  overflow: hidden;
}

.service-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 2px;
  background: var(--gradient-primary);
  opacity: 0;
  transition: opacity 0.4s;
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: hsla(220, 90%, 56%, 0.25);
  box-shadow: 0 20px 60px hsla(220, 90%, 56%, 0.1);
}

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

.service-icon {
  font-size: 2.5rem;
  margin-bottom: 1.5rem;
  display: block;
}

.service-card h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
}

.service-card p {
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.7;
}

/* ── Stats Section ─────────────────────────── */
.stats {
  padding: clamp(3rem, 6vw, 5rem) 0;
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 2rem;
  text-align: center;
}

.stat-item {
  padding: 1.5rem;
}

.stat-number {
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
  line-height: 1.2;
  margin-bottom: 0.5rem;
}

.stat-label {
  font-size: 0.9rem;
  color: var(--text-muted);
  font-weight: 500;
}

/* ── Process Section ───────────────────────── */
.process {
  padding: var(--section-pad);
}

.process-header {
  text-align: center;
  margin-bottom: 4rem;
}

.process-header .section-subtitle {
  margin: 0 auto;
}

.process-timeline {
  position: relative;
  max-width: 700px;
  margin: 0 auto;
}

/* Connecting line */
.process-timeline::before {
  content: '';
  position: absolute;
  left: 28px;
  top: 0;
  bottom: 0;
  width: 2px;
  background: linear-gradient(to bottom, var(--primary), var(--accent));
  opacity: 0.3;
}

.process-step {
  display: flex;
  gap: 2rem;
  padding-bottom: 3rem;
  position: relative;
}

.process-step:last-child {
  padding-bottom: 0;
}

.step-number {
  flex-shrink: 0;
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface);
  border: 2px solid var(--primary-dark);
  border-radius: 50%;
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--primary-light);
  position: relative;
  z-index: 2;
  transition: background 0.3s, border-color 0.3s, box-shadow 0.3s;
}

.process-step:hover .step-number {
  background: var(--primary-dark);
  border-color: var(--primary);
  box-shadow: var(--glow);
  color: white;
}

.step-content h3 {
  font-size: 1.25rem;
  font-weight: 700;
  margin-bottom: 0.5rem;
  padding-top: 0.15rem;
}

.step-content p {
  color: var(--text-muted);
  font-size: 0.95rem;
  line-height: 1.7;
}

/* ── Testimonials Section ──────────────────── */
.testimonials {
  padding: var(--section-pad);
  background: var(--surface);
}

.testimonials-header {
  text-align: center;
  margin-bottom: 4rem;
}

.testimonials-header .section-subtitle {
  margin: 0 auto;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.testimonial-card {
  padding: 2rem;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: transform 0.3s var(--ease-out), border-color 0.3s;
}

.testimonial-card:hover {
  transform: translateY(-4px);
  border-color: hsla(220, 90%, 56%, 0.2);
}

.testimonial-stars {
  color: hsl(45, 100%, 55%);
  font-size: 1rem;
  margin-bottom: 1rem;
  letter-spacing: 2px;
}

.testimonial-quote {
  position: relative;
  font-size: 0.95rem;
  color: var(--text-muted);
  line-height: 1.75;
  margin-bottom: 1.5rem;
  font-style: italic;
}

.testimonial-quote::before {
  content: '\201C';
  position: absolute;
  top: -1.2rem;
  left: -0.3rem;
  font-size: 3.5rem;
  color: hsla(220, 90%, 56%, 0.15);
  font-family: Georgia, serif;
  line-height: 1;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: 0.85rem;
}

.author-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-primary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 700;
  font-size: 1rem;
  color: white;
  flex-shrink: 0;
}

.author-info h4 {
  font-size: 0.95rem;
  font-weight: 600;
}

.author-info span {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* ── CTA / Contact Section ─────────────────── */
.cta-section {
  padding: var(--section-pad);
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 80% 60% at 50% 100%, hsla(220, 90%, 56%, 0.1), transparent);
  pointer-events: none;
}

.cta-inner {
  position: relative;
  z-index: 2;
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.cta-inner .section-title {
  margin-bottom: 0.75rem;
}

.cta-subtitle {
  font-size: 1.15rem;
  color: var(--text-muted);
  margin-bottom: 3rem;
}

.contact-form {
  max-width: 560px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  position: relative;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 1rem 1.2rem;
  background: var(--surface);
  border: 1.5px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.95rem;
  color: var(--text);
  transition: border-color 0.3s, box-shadow 0.3s;
  outline: none;
}

.form-group textarea {
  resize: vertical;
  min-height: 130px;
}

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

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px hsla(220, 90%, 56%, 0.12);
}

/* Floating label */
.form-group label {
  position: absolute;
  top: 50%;
  left: 1.2rem;
  transform: translateY(-50%);
  font-size: 0.95rem;
  color: var(--text-muted);
  pointer-events: none;
  transition: all 0.25s var(--ease-out);
  background: transparent;
  padding: 0 0.25rem;
}

.form-group textarea ~ label {
  top: 1.1rem;
  transform: none;
}

.form-group input:focus ~ label,
.form-group input:not(:placeholder-shown) ~ label {
  top: -0.5rem;
  left: 0.9rem;
  font-size: 0.75rem;
  color: var(--primary-light);
  background: var(--bg);
}

.form-group textarea:focus ~ label,
.form-group textarea:not(:placeholder-shown) ~ label {
  top: -0.5rem;
  left: 0.9rem;
  font-size: 0.75rem;
  color: var(--primary-light);
  background: var(--bg);
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.25rem;
}

.btn-submit {
  padding: 1rem 2.5rem;
  background: var(--gradient-primary);
  color: white;
  font-weight: 700;
  font-size: 1rem;
  border: none;
  border-radius: var(--radius);
  cursor: pointer;
  transition: transform 0.3s var(--ease-out), box-shadow 0.3s;
  position: relative;
  overflow: hidden;
}

.btn-submit::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, transparent 40%, hsla(0, 0%, 100%, 0.15) 50%, transparent 60%);
  transform: translateX(-100%);
  transition: transform 0.6s;
}

.btn-submit:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 40px hsla(220, 90%, 56%, 0.35);
}

.btn-submit:hover::after {
  transform: translateX(100%);
}

/* ── Footer ────────────────────────────────── */
.footer {
  padding: 4rem 0 2rem;
  border-top: 1px solid var(--border);
  background: var(--surface);
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 3rem;
  margin-bottom: 3rem;
}

.footer-brand .nav-logo {
  margin-bottom: 1rem;
}

.footer-brand p {
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.7;
  max-width: 280px;
}

.footer-col h4 {
  font-size: 0.85rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text);
  margin-bottom: 1.25rem;
}

.footer-col a {
  display: block;
  font-size: 0.9rem;
  color: var(--text-muted);
  padding: 0.3rem 0;
  transition: color 0.3s, transform 0.3s;
}

.footer-col a:hover {
  color: var(--primary-light);
  transform: translateX(4px);
}

.footer-social {
  display: flex;
  gap: 0.75rem;
  margin-top: 1rem;
}

.footer-social a {
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: 10px;
  font-size: 1.1rem;
  transition: background 0.3s, border-color 0.3s, transform 0.3s;
}

.footer-social a:hover {
  background: var(--primary-dark);
  border-color: var(--primary);
  transform: translateY(-2px);
}

.footer-bottom {
  text-align: center;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
  font-size: 0.85rem;
  color: var(--text-muted);
}

/* ── Animations ────────────────────────────── */
@keyframes fadeInUp {
  from {
    opacity: 0;
    transform: translateY(30px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

@keyframes float {
  0%, 100% {
    transform: translateY(0) scale(1);
  }
  50% {
    transform: translateY(-30px) scale(1.03);
  }
}

@keyframes pulse {
  0%, 100% {
    opacity: 0.6;
  }
  50% {
    opacity: 1;
  }
}

@keyframes slideInLeft {
  from {
    opacity: 0;
    transform: translateX(-40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

@keyframes slideInRight {
  from {
    opacity: 0;
    transform: translateX(40px);
  }
  to {
    opacity: 1;
    transform: translateX(0);
  }
}

/* Scroll-driven entry animation (modern approach) */
@media (prefers-reduced-motion: no-preference) {
  @supports ((animation-timeline: view()) and (animation-range: entry)) {
    @keyframes scrollFadeIn {
      from {
        opacity: 0;
        transform: translateY(30px);
      }
    }

    .animate-on-scroll {
      animation: scrollFadeIn auto linear backwards;
      animation-timeline: view();
      animation-range: entry 0% entry 30%;
    }
  }
}

/* Fallback for browsers without scroll-driven animations */
@supports not ((animation-timeline: view()) and (animation-range: entry)) {
  .animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
  }

  .animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
  }
}

/* Stagger children */
.animate-on-scroll.delay-1 { transition-delay: 0.1s; }
.animate-on-scroll.delay-2 { transition-delay: 0.2s; }
.animate-on-scroll.delay-3 { transition-delay: 0.3s; }
.animate-on-scroll.delay-4 { transition-delay: 0.4s; }

/* Hero entrance */
.hero-content {
  animation: fadeInUp 0.9s var(--ease-out) 0.2s backwards;
}

/* ── Reduced Motion ────────────────────────── */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }

  .animate-on-scroll {
    opacity: 1 !important;
    transform: none !important;
  }

  .hero-glow,
  .hero-glow-2 {
    animation: none;
  }
}

/* ── Responsive: Tablet (768px) ────────────── */
@media (max-width: 768px) {
  .hamburger {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: 0;
    right: -100%;
    width: min(320px, 85vw);
    height: 100vh;
    height: 100dvh;
    flex-direction: column;
    justify-content: center;
    gap: 1.5rem;
    background: var(--surface);
    border-left: 1px solid var(--border);
    padding: 2rem;
    transition: right 0.4s var(--ease-out);
    z-index: 1000;
  }

  .nav-links.open {
    right: 0;
  }

  .nav-links a {
    font-size: 1.1rem;
  }

  .services-grid,
  .testimonials-grid {
    grid-template-columns: 1fr;
  }

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

  .footer-grid {
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
  }

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

  .hero-glow {
    width: 350px;
    height: 350px;
    right: -20%;
  }

  /* Portfolio */
  .portfolio-grid {
    grid-template-columns: 1fr;
  }
}

/* ── Responsive: Mobile (480px) ────────────── */
@media (max-width: 480px) {
  .hero h1 {
    font-size: 2rem;
  }

  .hero-subtitle {
    font-size: 0.95rem;
  }

  .hero-buttons {
    flex-direction: column;
  }

  .hero-buttons .btn-primary,
  .hero-buttons .btn-outline {
    width: 100%;
    justify-content: center;
  }

  .stats-grid {
    grid-template-columns: 1fr;
    gap: 1rem;
  }

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

  .section-title {
    font-size: 1.75rem;
  }

  .process-step {
    gap: 1.25rem;
  }

  .step-number {
    width: 44px;
    height: 44px;
    font-size: 1rem;
  }

  .process-timeline::before {
    left: 21px;
  }
}

/* ── Portfolio Page Styles ─────────────────── */
.portfolio-hero {
  padding: clamp(8rem, 14vw, 12rem) 0 clamp(3rem, 6vw, 5rem);
  text-align: center;
  position: relative;
  overflow: hidden;
}

.portfolio-hero .hero-glow {
  top: -10%;
  right: 20%;
  width: 500px;
  height: 500px;
}

.portfolio-filters {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 0.75rem;
  margin-bottom: 3rem;
}

.filter-btn {
  padding: 0.5rem 1.25rem;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--text-muted);
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: 100px;
  cursor: pointer;
  transition: all 0.3s var(--ease-out);
}

.filter-btn:hover,
.filter-btn.active {
  color: white;
  background: var(--primary);
  border-color: var(--primary);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  padding-bottom: 4rem;
}

.portfolio-card {
  position: relative;
  border-radius: var(--radius-lg);
  overflow: hidden;
  border: 1px solid var(--border);
  background: var(--surface);
  transition: transform 0.4s var(--ease-out), box-shadow 0.4s;
  cursor: pointer;
}

.portfolio-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 20px 60px hsla(220, 90%, 56%, 0.15);
}

.portfolio-card-image {
  position: relative;
  aspect-ratio: 4 / 3;
  overflow: hidden;
}

.portfolio-card img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform 0.6s var(--ease-out);
}

.portfolio-card:hover img {
  transform: scale(1.05);
}

.portfolio-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(to top, hsla(225, 25%, 8%, 0.9) 0%, transparent 60%);
  opacity: 0;
  transition: opacity 0.4s var(--ease-out);
  display: flex;
  align-items: flex-end;
  padding: 1.5rem;
}

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

.portfolio-overlay span {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--primary-light);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.portfolio-card-details {
  padding: 1.25rem 1.5rem;
}

.portfolio-card-details h3 {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.35rem;
}

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

/* Mobile nav overlay backdrop */
.nav-overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: hsla(225, 25%, 4%, 0.6);
  z-index: 999;
  opacity: 0;
  transition: opacity 0.3s;
}

.nav-overlay.active {
  display: block;
  opacity: 1;
}