/* ============================================================
   BACKTESTBD — PREMIUM STYLESHEET
   Apple-inspired minimalist aesthetic
   ============================================================ */

/* ---------- CSS VARIABLES ---------- */
:root {
  --white:       #ffffff;
  --off-white:   #f5f5f7;
  --light-gray:  #d2d2d7;
  --mid-gray:    #86868b;
  --dark-gray:   #1d1d1f;
  --black:       #000000;
  --accent:      #0071e3;
  --accent-hover:#0077ed;
  --dark-bg:     #0a0a0a;
  --dark-card:   #141414;
  --dark-border: #2a2a2a;
  --success:     #34c759;

  --font-display: "SF Pro Display", "Helvetica Neue", Helvetica, Arial, sans-serif;
  --font-body:    "SF Pro Text", "Helvetica Neue", Helvetica, Arial, sans-serif;

  --radius:      16px;
  --radius-sm:   10px;
  --transition:  0.4s cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);

  --nav-h: 52px;
  --max-w: 1200px;
}

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

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

body {
  font-family: var(--font-body);
  background: var(--white);
  color: var(--dark-gray);
  overflow-x: hidden;
  line-height: 1.6;
}

img { display: block; max-width: 100%; }
a  { text-decoration: none; color: inherit; }
ul { list-style: none; }

/* ---------- CONTAINER ---------- */
.container {
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: 40px;
}

/* ---------- SECTION COMMON ---------- */
.section { padding-block: 120px; }

.section-header {
  text-align: center;
  max-width: 680px;
  margin-inline: auto;
  margin-bottom: 80px;
}

.section-eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 16px;
  display: block;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 700;
  letter-spacing: -0.03em;
  line-height: 1.15;
  color: var(--dark-gray);
  margin-bottom: 20px;
}

.section-sub {
  font-size: 18px;
  color: var(--mid-gray);
  line-height: 1.6;
}

.section-dark .section-title,
.section-dark .section-sub { color: rgba(255,255,255,0.85); }
.section-dark .section-sub { color: rgba(255,255,255,0.5); }

/* ============================================================
   NAVBAR
   ============================================================ */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  height: var(--nav-h);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid rgba(0,0,0,0.06);
  transition: background var(--transition), box-shadow var(--transition);
}

.navbar.scrolled {
  background: rgba(255,255,255,0.92);
  box-shadow: 0 1px 20px rgba(0,0,0,0.07);
}

.nav-inner {
  max-width: var(--max-w);
  margin-inline: auto;
  padding-inline: 40px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--dark-gray);
  transition: opacity var(--transition-fast);
}
.nav-logo:hover { opacity: 0.7; }

.nav-links {
  display: flex;
  align-items: center;
  gap: 36px;
}

.nav-link {
  font-size: 13px;
  font-weight: 400;
  color: var(--dark-gray);
  letter-spacing: 0.01em;
  transition: color var(--transition-fast);
  position: relative;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -4px; left: 0; right: 0;
  height: 1px;
  background: var(--dark-gray);
  transform: scaleX(0);
  transform-origin: right;
  transition: transform var(--transition-fast);
}

.nav-link:hover { color: var(--dark-gray); }
.nav-link:hover::after { transform: scaleX(1); transform-origin: left; }

.nav-link.nav-cta {
  background: var(--accent);
  color: var(--white);
  padding: 7px 16px;
  border-radius: 980px;
  font-weight: 500;
  transition: background var(--transition-fast), transform var(--transition-fast);
}
.nav-link.nav-cta::after { display: none; }
.nav-link.nav-cta:hover { background: var(--accent-hover); transform: scale(1.03); }

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.nav-toggle span {
  display: block;
  width: 22px; height: 2px;
  background: var(--dark-gray);
  border-radius: 2px;
  transition: var(--transition-fast);
}

/* ============================================================
   HERO
   ============================================================ */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  background: var(--white);
  padding-top: var(--nav-h);
}

/* Background orbs */
.hero-bg {
  position: absolute;
  inset: 0;
  overflow: hidden;
  pointer-events: none;
}

.hero-orb {
  position: absolute;
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.12;
  animation: orbFloat 8s ease-in-out infinite;
}
.orb-1 {
  width: 600px; height: 600px;
  background: radial-gradient(circle, #0071e3, transparent);
  top: -200px; right: -100px;
  animation-delay: 0s;
}
.orb-2 {
  width: 400px; height: 400px;
  background: radial-gradient(circle, #5856d6, transparent);
  bottom: -100px; left: -100px;
  animation-delay: -3s;
}
.orb-3 {
  width: 300px; height: 300px;
  background: radial-gradient(circle, #34c759, transparent);
  top: 50%; left: 40%;
  animation-delay: -5s;
}

@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(30px, -30px) scale(1.05); }
  66%       { transform: translate(-20px, 20px) scale(0.97); }
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(rgba(0,0,0,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,0,0,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 50%, black, transparent);
}

/* Hero Content */
.hero-content {
  position: relative;
  z-index: 1;
  text-align: center;
  max-width: 860px;
  padding-inline: 40px;
}

.hero-eyebrow {
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 24px;
}

.hero-headline {
  font-family: var(--font-display);
  font-size: clamp(3rem, 7vw, 5.5rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.08;
  color: var(--dark-gray);
  margin-bottom: 24px;
}

.hero-headline em {
  font-style: normal;
  background: linear-gradient(135deg, var(--accent), #5856d6);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.hero-sub {
  font-size: clamp(16px, 2vw, 20px);
  color: var(--mid-gray);
  max-width: 560px;
  margin-inline: auto;
  margin-bottom: 44px;
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 64px;
}

.hero-stats {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 0;
  flex-wrap: wrap;
}

.stat {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 0 36px;
}

.stat-num {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--dark-gray);
}

.stat-label {
  font-size: 12px;
  color: var(--mid-gray);
  margin-top: 4px;
  letter-spacing: 0.02em;
}

.stat-divider {
  width: 1px;
  height: 40px;
  background: var(--light-gray);
}

/* Scroll hint */
.hero-scroll-hint {
  position: absolute;
  bottom: 40px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  color: var(--mid-gray);
  font-size: 11px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
}

.scroll-line {
  width: 1px;
  height: 40px;
  background: linear-gradient(to bottom, var(--mid-gray), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; transform: scaleY(1); }
  50%       { opacity: 1; transform: scaleY(1.2); }
}

/* ============================================================
   BUTTONS
   ============================================================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 13px 26px;
  border-radius: 980px;
  font-size: 15px;
  font-weight: 500;
  letter-spacing: 0.01em;
  cursor: pointer;
  border: none;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), color var(--transition-fast);
}

.btn-primary {
  background: var(--accent);
  color: var(--white);
  box-shadow: 0 4px 16px rgba(0, 113, 227, 0.3);
}
.btn-primary:hover {
  background: var(--accent-hover);
  transform: scale(1.03);
  box-shadow: 0 6px 24px rgba(0, 113, 227, 0.4);
}

.btn-ghost {
  background: transparent;
  color: var(--accent);
  border: 1.5px solid rgba(0, 113, 227, 0.3);
}
.btn-ghost:hover {
  border-color: var(--accent);
  background: rgba(0, 113, 227, 0.05);
  transform: scale(1.03);
}

.btn-arrow { transition: transform var(--transition-fast); }
.btn-ghost:hover .btn-arrow { transform: translateX(4px); }

.btn-large {
  padding: 16px 36px;
  font-size: 17px;
}

/* ============================================================
   SERVICES
   ============================================================ */
.services { background: var(--off-white); }

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
}

.service-card {
  background: var(--white);
  border-radius: var(--radius);
  padding: 40px 36px;
  border: 1px solid rgba(0,0,0,0.05);
  transition: transform var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
  cursor: default;
}

.service-card::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(135deg, rgba(0,113,227,0.04), transparent);
  opacity: 0;
  transition: opacity var(--transition);
}

.service-card:hover {
  transform: translateY(-8px);
  box-shadow: 0 24px 48px rgba(0,0,0,0.1);
}

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

.service-icon {
  width: 48px; height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: rgba(0, 113, 227, 0.08);
  border-radius: var(--radius-sm);
  margin-bottom: 24px;
  color: var(--accent);
  transition: background var(--transition);
}
.service-icon svg { width: 22px; height: 22px; }
.service-card:hover .service-icon { background: rgba(0, 113, 227, 0.15); }

.service-title {
  font-family: var(--font-display);
  font-size: 19px;
  font-weight: 600;
  letter-spacing: -0.02em;
  color: var(--dark-gray);
  margin-bottom: 12px;
  line-height: 1.3;
}

.service-desc {
  font-size: 15px;
  color: var(--mid-gray);
  line-height: 1.6;
  margin-bottom: 20px;
}

.service-tag {
  display: inline-block;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--accent);
  background: rgba(0, 113, 227, 0.08);
  padding: 4px 10px;
  border-radius: 4px;
}

/* ============================================================
   PROJECTS
   ============================================================ */
.projects { background: var(--dark-bg); }
.projects .section-eyebrow { color: rgba(100, 180, 255, 0.9); }

.projects-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
  gap: 24px;
}

.project-card {
  background: var(--dark-card);
  border-radius: var(--radius);
  border: 1px solid var(--dark-border);
  overflow: hidden;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}

.project-card:hover {
  transform: translateY(-6px);
  box-shadow: 0 32px 64px rgba(0,0,0,0.5);
  border-color: rgba(255,255,255,0.15);
}

.project-thumb {
  position: relative;
  aspect-ratio: 16/9;
  overflow: hidden;
}

.project-thumb-inner {
  width: 100%; height: 100%;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  transition: transform var(--transition);
}
.project-card:hover .project-thumb-inner { transform: scale(1.06); }

.thumb-icon {
  font-size: 3rem;
  margin-bottom: 8px;
  filter: drop-shadow(0 4px 12px rgba(0,0,0,0.3));
}

.thumb-label {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.7);
  background: rgba(0,0,0,0.35);
  padding: 4px 12px;
  border-radius: 980px;
}

/* Overlay */
.project-overlay {
  position: absolute;
  inset: 0;
  background: rgba(0,0,0,0.65);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  transition: opacity var(--transition);
  backdrop-filter: blur(4px);
}
.project-card:hover .project-overlay { opacity: 1; }

.overlay-btn {
  background: var(--white);
  color: var(--dark-gray);
  padding: 10px 24px;
  border-radius: 980px;
  font-size: 14px;
  font-weight: 600;
  transform: translateY(8px);
  transition: transform var(--transition), background var(--transition);
}
.project-card:hover .overlay-btn { transform: translateY(0); }
.overlay-btn:hover { background: var(--off-white); }

.project-info {
  padding: 24px 28px;
}

.project-name {
  font-family: var(--font-display);
  font-size: 17px;
  font-weight: 600;
  color: rgba(255,255,255,0.92);
  margin-bottom: 8px;
  letter-spacing: -0.01em;
}

.project-desc {
  font-size: 14px;
  color: rgba(255,255,255,0.45);
  line-height: 1.6;
  margin-bottom: 16px;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

.project-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  font-size: 13px;
  font-weight: 600;
  color: rgba(100, 180, 255, 0.9);
  letter-spacing: 0.02em;
  transition: gap var(--transition-fast), color var(--transition-fast);
}
.project-link span { transition: transform var(--transition-fast); }
.project-link:hover { color: #64b4ff; }
.project-link:hover span { transform: translateX(4px); }

/* ============================================================
   ABOUT
   ============================================================ */
.about { background: var(--white); }

.about-layout {
  display: grid;
  grid-template-columns: 1fr 1.5fr;
  gap: 80px;
  align-items: start;
}

.about-left .section-eyebrow { text-align: left; }
.about-left .section-title   { text-align: left; }

.about-body {
  font-size: 17px;
  color: var(--mid-gray);
  line-height: 1.7;
  margin-bottom: 24px;
}

.about-pillars {
  display: flex;
  flex-direction: column;
  gap: 20px;
  margin-top: 36px;
}

.pillar {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  padding: 20px 24px;
  background: var(--off-white);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(0,0,0,0.05);
}

.pillar-icon {
  font-size: 20px;
  flex-shrink: 0;
  line-height: 1;
  margin-top: 2px;
}

.pillar div { display: flex; flex-direction: column; gap: 4px; }
.pillar strong { font-size: 15px; font-weight: 600; color: var(--dark-gray); }
.pillar span   { font-size: 14px; color: var(--mid-gray); }

/* ============================================================
   CTA BANNER
   ============================================================ */
.cta-banner {
  background: var(--dark-gray);
  padding-block: 120px;
  overflow: hidden;
  position: relative;
}

.cta-banner::before {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(0,113,227,0.25), transparent 70%);
  pointer-events: none;
}

.cta-inner {
  text-align: center;
  position: relative;
  z-index: 1;
}

.cta-headline {
  font-family: var(--font-display);
  font-size: clamp(2.4rem, 5vw, 3.8rem);
  font-weight: 700;
  letter-spacing: -0.04em;
  line-height: 1.12;
  color: var(--white);
  margin-bottom: 20px;
}

.cta-headline em {
  font-style: normal;
  background: linear-gradient(135deg, var(--accent), #a78bfa);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.cta-sub {
  font-size: 18px;
  color: rgba(255,255,255,0.55);
  margin-bottom: 44px;
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact { background: var(--off-white); }

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 64px;
  align-items: start;
}

.contact-method {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 28px;
}

.contact-method-icon {
  width: 44px; height: 44px;
  flex-shrink: 0;
  background: var(--white);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(0,0,0,0.07);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent);
}
.contact-method-icon svg { width: 18px; height: 18px; }

.contact-method-label {
  display: block;
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--mid-gray);
  font-weight: 600;
  margin-bottom: 4px;
}

.contact-method-value {
  font-size: 16px;
  font-weight: 500;
  color: var(--dark-gray);
  transition: color var(--transition-fast);
}
.contact-method-value:hover { color: var(--accent); }

.contact-note {
  margin-top: 40px;
  padding: 24px;
  background: var(--white);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(0,0,0,0.06);
}
.contact-note p {
  font-size: 14px;
  color: var(--mid-gray);
  line-height: 2;
}

/* Form */
.contact-form {
  background: var(--white);
  border-radius: var(--radius);
  padding: 44px 40px;
  border: 1px solid rgba(0,0,0,0.06);
  box-shadow: 0 4px 24px rgba(0,0,0,0.04);
}

.form-group {
  margin-bottom: 24px;
}

.form-group label {
  display: block;
  font-size: 13px;
  font-weight: 600;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--dark-gray);
  margin-bottom: 8px;
}

.form-group input,
.form-group textarea {
  width: 100%;
  padding: 13px 16px;
  border: 1.5px solid var(--light-gray);
  border-radius: var(--radius-sm);
  font-family: var(--font-body);
  font-size: 15px;
  color: var(--dark-gray);
  background: var(--white);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  outline: none;
  resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder { color: rgba(134,134,139,0.7); }

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(0, 113, 227, 0.12);
}

.form-group input.error,
.form-group textarea.error {
  border-color: #ff3b30;
  box-shadow: 0 0 0 3px rgba(255, 59, 48, 0.1);
}

.form-error {
  display: block;
  font-size: 12px;
  color: #ff3b30;
  margin-top: 6px;
  font-weight: 500;
  min-height: 18px;
}

.btn-submit {
  width: 100%;
  justify-content: center;
  padding: 14px;
  font-size: 16px;
  border-radius: var(--radius-sm);
}

.form-success {
  display: none;
  text-align: center;
  color: var(--success);
  font-weight: 600;
  font-size: 15px;
  margin-top: 16px;
  padding: 16px;
  background: rgba(52, 199, 89, 0.08);
  border-radius: var(--radius-sm);
  border: 1px solid rgba(52, 199, 89, 0.2);
}

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  background: var(--dark-bg);
  padding-block: 64px 40px;
  border-top: 1px solid var(--dark-border);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: 60px;
  padding-bottom: 52px;
  border-bottom: 1px solid var(--dark-border);
  flex-wrap: wrap;
}

.footer-logo {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  letter-spacing: -0.03em;
  color: var(--white);
  display: block;
  margin-bottom: 10px;
}

.footer-tagline {
  font-size: 14px;
  color: rgba(255,255,255,0.35);
}

.footer-links-grid {
  display: flex;
  gap: 64px;
  flex-wrap: wrap;
}

.footer-col {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.footer-col-title {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: rgba(255,255,255,0.4);
  margin-bottom: 4px;
}

.footer-col a {
  font-size: 14px;
  color: rgba(255,255,255,0.6);
  transition: color var(--transition-fast);
}
.footer-col a:hover { color: var(--white); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 12px;
  padding-top: 32px;
}

.footer-bottom p {
  font-size: 13px;
  color: rgba(255,255,255,0.3);
}

/* ============================================================
   SCROLL REVEAL ANIMATIONS
   ============================================================ */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.75s cubic-bezier(0.4, 0, 0.2, 1),
              transform 0.75s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.reveal.delay-1 { transition-delay: 0.12s; }
.reveal.delay-2 { transition-delay: 0.24s; }
.reveal.delay-3 { transition-delay: 0.36s; }
.reveal.delay-4 { transition-delay: 0.48s; }

/* ============================================================
   RESPONSIVE — TABLET
   ============================================================ */
@media (max-width: 900px) {

  .container { padding-inline: 28px; }
  .section { padding-block: 88px; }

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

  .contact-layout {
    grid-template-columns: 1fr;
    gap: 44px;
  }

  .hero-stats { gap: 0; }
  .stat { padding: 0 20px; }

  .footer-top { flex-direction: column; gap: 44px; }
  .footer-links-grid { gap: 40px; }
}

/* ============================================================
   RESPONSIVE — MOBILE
   ============================================================ */
@media (max-width: 640px) {

  :root { --nav-h: 50px; }
  .container { padding-inline: 20px; }
  .section { padding-block: 72px; }
  .section-header { margin-bottom: 56px; }

  /* Nav mobile */
  .nav-inner { padding-inline: 20px; }
  .nav-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: var(--nav-h);
    left: 0; right: 0;
    background: rgba(255,255,255,0.97);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    flex-direction: column;
    align-items: center;
    gap: 0;
    padding: 20px 0 32px;
    border-bottom: 1px solid rgba(0,0,0,0.08);
    transform: translateY(-110%);
    opacity: 0;
    transition: transform var(--transition), opacity var(--transition);
    pointer-events: none;
  }

  .nav-links.open {
    transform: translateY(0);
    opacity: 1;
    pointer-events: all;
  }

  .nav-links li { width: 100%; text-align: center; }
  .nav-link {
    display: block;
    padding: 14px 20px;
    font-size: 16px;
  }
  .nav-link::after { display: none; }
  .nav-link.nav-cta {
    margin: 8px auto 0;
    width: calc(100% - 40px);
    border-radius: var(--radius-sm);
    padding: 12px;
  }

  /* Hamburger → X */
  .nav-toggle.active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .nav-toggle.active span:nth-child(2) { opacity: 0; }
  .nav-toggle.active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

  /* Hero */
  .hero-content { padding-inline: 20px; }
  .hero-actions { flex-direction: column; align-items: stretch; }
  .btn { justify-content: center; }

  .hero-stats { flex-direction: column; gap: 24px; }
  .stat-divider { display: none; }

  /* Services */
  .services-grid { grid-template-columns: 1fr; gap: 16px; }
  .service-card { padding: 28px 24px; }

  /* Projects */
  .projects-grid { grid-template-columns: 1fr; gap: 16px; }

  /* Contact form */
  .contact-form { padding: 28px 20px; }

  /* Footer */
  .footer-links-grid { flex-direction: column; gap: 28px; }
  .footer-bottom { flex-direction: column; text-align: center; }
}