/* ==========================================================================
   RAKA ADITYA PRATAMA — PORTFOLIO
   Modern Glassmorphism + 3D Interactive + Dark Elegant UI
   ========================================================================== */

/* ---------- 1. VARIABLES ---------- */
:root{
  /* colors */
  --bg: #050816;
  --bg-soft: #0a1024;
  --card: rgba(255,255,255,0.08);
  --card-strong: rgba(255,255,255,0.12);
  --border: rgba(255,255,255,0.12);
  --primary: #4F8CFF;
  --secondary: #8B5CF6;
  --accent: #22D3EE;
  --text: #F5F7FF;
  --text-dim: rgba(245,247,255,0.68);
  --text-faint: rgba(245,247,255,0.42);

  /* gradients */
  --grad-primary: linear-gradient(135deg, var(--primary), var(--secondary));
  --grad-accent: linear-gradient(135deg, var(--accent), var(--primary));

  /* type */
  --font-display: 'Space Grotesk', 'Inter', sans-serif;
  --font-body: 'Inter', sans-serif;

  /* layout */
  --max-width: 1240px;
  --nav-h: 84px;
  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;

  /* motion */
  --ease: cubic-bezier(.16,.84,.44,1);
  --transition-fast: .25s var(--ease);
  --transition-med: .5s var(--ease);
}

/* ---------- 2. RESET ---------- */
*, *::before, *::after{ box-sizing: border-box; margin: 0; padding: 0; }

html{
  scroll-behavior: smooth;
  scroll-padding-top: var(--nav-h);
}

body{
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-body);
  font-weight: 400;
  line-height: 1.6;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

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

::selection{ background: var(--primary); color: #fff; }

/* focus visibility for a11y */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible{
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* scrollbar */
::-webkit-scrollbar{ width: 10px; }
::-webkit-scrollbar-track{ background: var(--bg); }
::-webkit-scrollbar-thumb{ background: var(--card-strong); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover{ background: var(--primary); }

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

/* ---------- 3. UTILITIES ---------- */
.grad-text{
  background: var(--grad-primary);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}

.glass-card{
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
  transition: transform var(--transition-med), box-shadow var(--transition-med), border-color var(--transition-med);
}

.section{ position: relative; padding: 140px 0; }
.section-inner{ max-width: var(--max-width); margin: 0 auto; padding: 0 32px; }

.section-eyebrow{
  font-family: var(--font-display);
  font-size: .8rem;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 14px;
  font-weight: 600;
}

.section-title{
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 3.6vw, 2.9rem);
  font-weight: 600;
  margin-bottom: 22px;
  letter-spacing: -.01em;
}

.section-lead{
  max-width: 640px;
  color: var(--text-dim);
  font-size: 1.05rem;
  margin-bottom: 56px;
}

/* ---------- 4. LOADER ---------- */
#loader{
  position: fixed; inset: 0; z-index: 9999;
  background: var(--bg);
  display: flex; flex-direction: column; align-items: center; justify-content: center;
  gap: 22px;
}

.loader-core{
  position: relative;
  width: 90px; height: 90px;
  display: flex; align-items: center; justify-content: center;
}

.loader-ring{
  position: absolute; inset: 0;
  border-radius: 50%;
  border: 2px solid transparent;
  border-top-color: var(--primary);
  border-right-color: var(--secondary);
  animation: spin 1.1s linear infinite;
}
.loader-ring:nth-child(2){
  inset: 14px;
  border-top-color: var(--accent);
  border-right-color: transparent;
  border-bottom-color: var(--primary);
  animation-duration: 1.6s;
  animation-direction: reverse;
}

@keyframes spin{ to{ transform: rotate(360deg); } }

.loader-percent{
  font-family: var(--font-display);
  font-size: .95rem;
  font-weight: 600;
  color: var(--text);
}

.loader-label{
  font-size: .82rem;
  color: var(--text-faint);
  letter-spacing: .08em;
  text-transform: uppercase;
}

/* ---------- 5. CURSOR GLOW ---------- */
.cursor-glow{
  position: fixed;
  width: 380px; height: 380px;
  border-radius: 50%;
  pointer-events: none;
  z-index: 2;
  background: radial-gradient(circle, rgba(79,140,255,.14) 0%, rgba(139,92,246,.06) 45%, transparent 72%);
  transform: translate(-50%, -50%);
  will-change: transform;
  transition: opacity .3s ease;
}

@media (max-width: 900px){
  .cursor-glow{ display: none; }
}

/* ---------- 6. BACKGROUND LAYERS ---------- */
.bg-layers{
  position: fixed; inset: 0;
  z-index: 0;
  overflow: hidden;
  pointer-events: none;
}

#particles-canvas{
  position: absolute; inset: 0;
  width: 100%; height: 100%;
}

.bg-gradient-blob{
  position: absolute;
  border-radius: 50%;
  filter: blur(120px);
  opacity: .35;
  will-change: transform;
}
.blob-a{
  width: 560px; height: 560px;
  background: var(--primary);
  top: -160px; left: -120px;
  animation: drift-a 22s ease-in-out infinite;
}
.blob-b{
  width: 480px; height: 480px;
  background: var(--secondary);
  bottom: -160px; right: -100px;
  animation: drift-b 26s ease-in-out infinite;
}

@keyframes drift-a{
  0%,100%{ transform: translate(0,0) scale(1); }
  50%{ transform: translate(60px, 80px) scale(1.15); }
}
@keyframes drift-b{
  0%,100%{ transform: translate(0,0) scale(1); }
  50%{ transform: translate(-50px, -60px) scale(1.1); }
}

.bg-noise{
  position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,.035) 1px, transparent 1px);
  background-size: 3px 3px;
  opacity: .5;
}

main, .navbar, .footer{ position: relative; z-index: 1; }

/* ---------- 7. NAVBAR ---------- */
.navbar{
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  height: var(--nav-h);
  display: flex; align-items: center;
  transition: background var(--transition-med), border-color var(--transition-med), backdrop-filter var(--transition-med), height var(--transition-med);
  border-bottom: 1px solid transparent;
}

.navbar.scrolled{
  height: 68px;
  background: rgba(5,8,22,0.65);
  border-bottom-color: var(--border);
  backdrop-filter: blur(18px);
  -webkit-backdrop-filter: blur(18px);
}

.nav-inner{
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.nav-logo{
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -.02em;
}
.logo-bracket{ color: var(--accent); }

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

.nav-link{
  position: relative;
  font-size: .92rem;
  font-weight: 500;
  color: var(--text-dim);
  padding: 8px 16px;
  border-radius: 999px;
  transition: color var(--transition-fast), background var(--transition-fast);
}
.nav-link:hover{ color: var(--text); background: rgba(255,255,255,0.06); }
.nav-link.active{ color: var(--text); }
.nav-link.active::after{
  content: '';
  position: absolute;
  left: 16px; right: 16px; bottom: 3px;
  height: 2px;
  background: var(--grad-primary);
  border-radius: 2px;
}

.nav-toggle{
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px; height: 40px;
}
.nav-toggle span{
  display: block;
  width: 22px; height: 2px;
  background: var(--text);
  border-radius: 2px;
  transition: transform .3s var(--ease), opacity .3s var(--ease);
}
.nav-toggle.open span:nth-child(1){ transform: translateY(7px) rotate(45deg); }
.nav-toggle.open span:nth-child(2){ opacity: 0; }
.nav-toggle.open span:nth-child(3){ transform: translateY(-7px) rotate(-45deg); }

/* ---------- 8. HERO ---------- */
.hero{
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: var(--nav-h) 32px 60px;
}

.hero-inner{
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1.1fr .9fr;
  gap: 40px;
  align-items: center;
}

.hero-eyebrow{
  font-family: var(--font-display);
  font-size: .8rem;
  letter-spacing: .3em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 20px;
  font-weight: 600;
}

.hero-title{
  font-family: var(--font-display);
  font-weight: 700;
  font-size: clamp(2.4rem, 5.2vw, 4.2rem);
  line-height: 1.08;
  letter-spacing: -.02em;
}
.hero-title .line{ display: block; }
.hero-name{ margin-top: 4px; }

.hero-role{
  margin-top: 20px;
  font-family: var(--font-display);
  font-size: clamp(1.15rem, 2vw, 1.55rem);
  font-weight: 500;
  color: var(--accent);
  min-height: 1.6em;
}
.type-cursor{
  display: inline-block;
  margin-left: 2px;
  animation: blink 1s step-end infinite;
  color: var(--primary);
}
@keyframes blink{ 50%{ opacity: 0; } }

.hero-desc{
  margin-top: 22px;
  max-width: 480px;
  color: var(--text-dim);
  font-size: 1.05rem;
}

.hero-actions{
  margin-top: 40px;
  display: flex;
  flex-wrap: wrap;
  gap: 14px;
}

.btn{
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 26px;
  border-radius: 999px;
  font-size: .92rem;
  font-weight: 600;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), border-color var(--transition-fast);
}
.btn i{ font-size: .8rem; transition: transform var(--transition-fast); }
.btn:hover{ transform: translateY(-3px); }
.btn:hover i{ transform: translateX(3px); }

.btn-primary{
  background: var(--grad-primary);
  color: #fff;
  box-shadow: 0 12px 30px -10px rgba(79,140,255,.55);
}
.btn-primary:hover{ box-shadow: 0 16px 40px -8px rgba(139,92,246,.6); }

.btn-ghost{
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--text);
}
.btn-ghost:hover{ background: var(--card-strong); }

.btn-outline{
  border: 1px solid var(--border);
  color: var(--text-dim);
}
.btn-outline:hover{ border-color: var(--primary); color: var(--text); }

.hero-scroll{
  margin-top: 64px;
  display: flex;
  align-items: center;
  gap: 12px;
  font-size: .78rem;
  letter-spacing: .12em;
  text-transform: uppercase;
  color: var(--text-faint);
}
.scroll-line{
  width: 34px; height: 1px;
  background: var(--text-faint);
  position: relative;
  overflow: hidden;
}
.scroll-line::after{
  content: '';
  position: absolute; inset: 0;
  background: var(--accent);
  animation: scroll-line-move 2s ease-in-out infinite;
}
@keyframes scroll-line-move{
  0%{ transform: translateX(-100%); }
  50%{ transform: translateX(0); }
  100%{ transform: translateX(100%); }
}

.hero-3d{
  position: relative;
  height: 520px;
  display: flex;
  align-items: center;
  justify-content: center;
}
#hero-canvas{
  width: 100%; height: 100%;
  cursor: grab;
}
.hero-3d-glow{
  position: absolute;
  width: 60%; height: 60%;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(79,140,255,.35), transparent 70%);
  filter: blur(40px);
  z-index: -1;
  animation: pulse-glow 4s ease-in-out infinite;
}
@keyframes pulse-glow{
  0%,100%{ opacity: .6; transform: scale(1); }
  50%{ opacity: 1; transform: scale(1.15); }
}

@media (max-width: 980px){
  .hero-inner{ grid-template-columns: 1fr; text-align: center; }
  .hero-desc{ margin-inline: auto; }
  .hero-actions{ justify-content: center; }
  .hero-scroll{ justify-content: center; }
  .hero-3d{ height: 360px; order: -1; }
}

/* ---------- 9. PROFILE ---------- */
.profile-grid{
  display: grid;
  grid-template-columns: .8fr 1.2fr;
  gap: 60px;
  align-items: center;
}

.profile-photo-wrap{
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 22px;
}

.profile-photo-ring{
  width: 260px; height: 260px;
  border-radius: 50%;
  padding: 6px;
  background: conic-gradient(from 0deg, var(--primary), var(--secondary), var(--accent), var(--primary));
  animation: rotate-ring 8s linear infinite;
}
@keyframes rotate-ring{ to{ transform: rotate(360deg); } }

.profile-photo{
  width: 100%; height: 100%;
  border-radius: 50%;
  background: var(--bg-soft);
  display: flex; align-items: center; justify-content: center;
  font-size: 5.5rem;
  color: var(--accent);
  border: 3px solid var(--bg);
  overflow: hidden;
}

.profile-photo img{
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.profile-photo-badge{
  display: flex; align-items: center; gap: 8px;
  padding: 8px 18px;
  border-radius: 999px;
  background: var(--card);
  border: 1px solid var(--border);
  font-size: .85rem;
  color: var(--text-dim);
}
.profile-photo-badge i{ color: #4ade80; }

.profile-info h3{
  font-family: var(--font-display);
  font-size: 1.8rem;
  margin-bottom: 16px;
}
.profile-desc{
  color: var(--text-dim);
  max-width: 520px;
  margin-bottom: 32px;
}

.profile-details{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 20px;
}
.profile-details li{
  display: flex;
  align-items: flex-start;
  gap: 14px;
}
.profile-details i{
  width: 40px; height: 40px;
  flex-shrink: 0;
  border-radius: 12px;
  display: flex; align-items: center; justify-content: center;
  background: var(--card);
  border: 1px solid var(--border);
  color: var(--accent);
}
.profile-details span{
  display: block;
  font-size: .78rem;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: .06em;
}
.profile-details strong{
  font-weight: 500;
  font-size: .95rem;
}

@media (max-width: 860px){
  .profile-grid{ grid-template-columns: 1fr; }
  .profile-details{ grid-template-columns: 1fr; }
}

/* ---------- 10. ABOUT ---------- */
.about-grid{
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}

.about-col-title{
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 600;
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 26px;
  color: var(--text);
}
.about-col-title i{ color: var(--primary); }
.goal-title{ margin-top: 32px; }

.timeline{
  position: relative;
  padding-left: 26px;
  border-left: 1px solid var(--border);
}
.timeline-item{ position: relative; margin-bottom: 24px; }
.timeline-item:last-child{ margin-bottom: 0; }
.timeline-dot{
  position: absolute;
  left: -32px; top: 6px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--grad-primary);
  box-shadow: 0 0 0 4px rgba(79,140,255,.15);
}
.timeline-content{ padding: 22px; }
.timeline-year{
  font-size: .78rem;
  color: var(--accent);
  letter-spacing: .06em;
  text-transform: uppercase;
  font-weight: 600;
}
.timeline-content h4{
  font-family: var(--font-display);
  margin: 8px 0 6px;
  font-size: 1.05rem;
}
.timeline-content p{ color: var(--text-dim); font-size: .92rem; }

.exp-card{
  display: flex;
  gap: 18px;
  padding: 22px;
  margin-bottom: 18px;
}
.exp-icon{
  width: 46px; height: 46px;
  flex-shrink: 0;
  border-radius: 14px;
  background: var(--grad-primary);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.1rem;
}
.exp-card h4{ font-family: var(--font-display); font-size: 1rem; margin-bottom: 4px; }
.exp-time{ font-size: .78rem; color: var(--text-faint); }
.exp-card p{ color: var(--text-dim); font-size: .9rem; margin-top: 8px; }

.glass-card:hover{
  transform: translateY(-6px);
  border-color: rgba(79,140,255,.4);
  box-shadow: 0 20px 40px -20px rgba(79,140,255,.35);
}

@media (max-width: 860px){
  .about-grid{ grid-template-columns: 1fr; gap: 44px; }
}

/* ---------- 11. SKILLS ---------- */
.skills-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 22px;
}

.skill-card{ padding: 26px; }
.skill-top{
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 18px;
}
.skill-top i{ font-size: 1.6rem; color: var(--accent); }
.skill-percent{ font-family: var(--font-display); font-weight: 600; color: var(--text-dim); font-size: .9rem; }
.skill-card h4{ font-size: 1rem; margin-bottom: 14px; font-weight: 500; }

.skill-bar{
  height: 6px;
  border-radius: 999px;
  background: rgba(255,255,255,.08);
  overflow: hidden;
}
.skill-fill{
  height: 100%;
  width: 0%;
  border-radius: 999px;
  background: var(--grad-accent);
  transition: width 1.4s var(--ease);
}

@media (max-width: 980px){
  .skills-grid{ grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 520px){
  .skills-grid{ grid-template-columns: 1fr 1fr; gap: 14px; }
  .skill-card{ padding: 18px; }
}

/* ---------- 12. PORTFOLIO ---------- */
.portfolio-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 26px;
  perspective: 1200px;
}

.project-card{
  overflow: hidden;
  transition: transform var(--transition-med), box-shadow var(--transition-med), border-color var(--transition-med);
}
.project-card:hover{
  transform: translateY(-10px) rotateX(4deg) rotateY(-4deg);
  border-color: rgba(139,92,246,.45);
  box-shadow: 0 30px 60px -25px rgba(139,92,246,.45);
}

.project-thumb{
  height: 180px;
  display: flex; align-items: center; justify-content: center;
  font-size: 2.6rem;
  color: #fff;
  background: linear-gradient(135deg, var(--c1), var(--c2));
  position: relative;
  overflow: hidden;
}
.project-thumb::after{
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(circle at 30% 20%, rgba(255,255,255,.35), transparent 60%);
}

.project-body{ padding: 24px; }
.project-body h3{ font-family: var(--font-display); font-size: 1.1rem; margin-bottom: 8px; }
.project-body p{ color: var(--text-dim); font-size: .9rem; margin-bottom: 16px; }

.project-tags{ display: flex; flex-wrap: wrap; gap: 8px; margin-bottom: 20px; }
.project-tags span{
  font-size: .74rem;
  padding: 4px 12px;
  border-radius: 999px;
  background: rgba(255,255,255,.06);
  border: 1px solid var(--border);
  color: var(--text-dim);
}

.project-links{ display: flex; gap: 12px; }
.pj-btn{
  display: flex; align-items: center; gap: 8px;
  font-size: .82rem;
  font-weight: 600;
  padding: 9px 16px;
  border-radius: 999px;
  background: var(--grad-primary);
  color: #fff;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}
.pj-btn-outline{
  background: none;
  border: 1px solid var(--border);
  color: var(--text-dim);
}
.pj-btn:hover{ transform: translateY(-2px); opacity: .92; }

@media (max-width: 980px){
  .portfolio-grid{ grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px){
  .portfolio-grid{ grid-template-columns: 1fr; }
}

/* ---------- 13. STATS ---------- */
.stats-section{ padding: 80px 0; }
.stats-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  text-align: center;
}
.stat-card{
  padding: 40px 20px;
  border-radius: var(--radius-md);
  background: var(--card);
  border: 1px solid var(--border);
}
.stat-number{
  display: block;
  font-family: var(--font-display);
  font-size: clamp(2.2rem, 4vw, 3rem);
  font-weight: 700;
  background: var(--grad-accent);
  -webkit-background-clip: text;
  background-clip: text;
  color: transparent;
}
.stat-label{
  display: block;
  margin-top: 10px;
  font-size: .85rem;
  color: var(--text-dim);
  letter-spacing: .04em;
}

@media (max-width: 760px){
  .stats-grid{ grid-template-columns: 1fr 1fr; }
}

/* ---------- 14. CONTACT ---------- */
.contact-grid{
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 40px;
}

.contact-form{ padding: 36px; }
.form-row{ display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group{ margin-bottom: 20px; }
.form-group label{
  display: block;
  font-size: .82rem;
  color: var(--text-dim);
  margin-bottom: 8px;
  font-weight: 500;
}
.form-group input, .form-group textarea{
  width: 100%;
  padding: 13px 16px;
  border-radius: var(--radius-sm);
  background: rgba(255,255,255,.05);
  border: 1px solid var(--border);
  color: var(--text);
  font-size: .92rem;
  transition: border-color var(--transition-fast), background var(--transition-fast);
  resize: vertical;
}
.form-group input::placeholder, .form-group textarea::placeholder{ color: var(--text-faint); }
.form-group input:focus, .form-group textarea:focus{
  border-color: var(--primary);
  background: rgba(255,255,255,.08);
  outline: none;
}

.form-submit{ margin-top: 6px; width: 100%; justify-content: center; }
.form-status{
  margin-top: 14px;
  font-size: .85rem;
  color: var(--accent);
  min-height: 1.2em;
}

.contact-side{ display: flex; flex-direction: column; gap: 18px; }
.contact-info-card{
  display: flex; align-items: center; gap: 16px;
  padding: 22px;
}
.contact-info-card i{
  width: 46px; height: 46px;
  flex-shrink: 0;
  border-radius: 14px;
  background: var(--grad-primary);
  display: flex; align-items: center; justify-content: center;
}
.contact-info-card span{ display: block; font-size: .78rem; color: var(--text-faint); text-transform: uppercase; letter-spacing: .05em; }
.contact-info-card strong{ font-weight: 500; font-size: .92rem; word-break: break-word; }

.social-row{ display: flex; gap: 14px; margin-top: 8px; flex-wrap: wrap; }
.social-icon{
  width: 48px; height: 48px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  background: var(--card);
  border: 1px solid var(--border);
  font-size: 1.1rem;
  color: var(--text-dim);
  transition: transform var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}
.social-icon:hover{
  transform: translateY(-5px) scale(1.05);
  color: #fff;
  background: var(--grad-primary);
  border-color: transparent;
}

@media (max-width: 860px){
  .contact-grid{ grid-template-columns: 1fr; }
  .form-row{ grid-template-columns: 1fr; }
}

/* ---------- 15. FOOTER ---------- */
.footer{
  padding: 34px 32px;
  border-top: 1px solid var(--border);
}
.footer-inner{
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
  flex-wrap: wrap;
}
.footer-inner p{ font-size: .85rem; color: var(--text-faint); }
.footer-social{ display: flex; gap: 16px; }
.footer-social a{
  color: var(--text-dim);
  font-size: 1.05rem;
  transition: color var(--transition-fast), transform var(--transition-fast);
}
.footer-social a:hover{ color: var(--accent); transform: translateY(-3px); }

.back-to-top{
  width: 42px; height: 42px;
  border-radius: 50%;
  background: var(--card);
  border: 1px solid var(--border);
  display: flex; align-items: center; justify-content: center;
  color: var(--text);
  transition: transform var(--transition-fast), background var(--transition-fast);
}
.back-to-top:hover{ background: var(--grad-primary); transform: translateY(-4px); }

/* ---------- 16. REVEAL ANIMATION HOOK ---------- */
[data-reveal]{
  opacity: 0;
  transform: translateY(28px);
}

/* ---------- 17. RESPONSIVE NAV ---------- */
@media (max-width: 860px){
  .nav-toggle{ display: flex; }
  .nav-links{
    position: fixed;
    top: var(--nav-h); left: 0; right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 4px;
    background: rgba(5,8,22,0.96);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    padding: 16px;
    transform: translateY(-130%);
    opacity: 0;
    transition: transform var(--transition-med), opacity var(--transition-med);
  }
  .nav-links.open{ transform: translateY(0); opacity: 1; }
  .nav-link{ padding: 14px 18px; border-radius: 12px; }
  .nav-link.active::after{ display: none; }
  .nav-link.active{ background: rgba(255,255,255,.06); }
}

@media (max-width: 640px){
  .section{ padding: 90px 0; }
  .section-inner{ padding: 0 20px; }
  .hero{ padding: var(--nav-h) 20px 60px; }
}