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

:root {
  --bg-900: #0a0b0f;
  --bg-800: #0f1117;
  --bg-700: #151821;
  --bg-600: #1c2030;
  --bg-500: #242840;

  --accent: #4f8ef7;
  --accent-light: #7aadfb;
  --accent-dark: #2c5fc4;
  --accent-glow: rgba(79, 142, 247, 0.15);

  --green: #22d55a;
  --green-dim: rgba(34, 213, 90, 0.2);

  --text-primary: #e8eaf0;
  --text-secondary: #8b91a8;
  --text-muted: #555c75;

  --border: rgba(255, 255, 255, 0.07);
  --border-hover: rgba(79, 142, 247, 0.4);

  --radius: 12px;
  --radius-sm: 8px;
  --radius-lg: 20px;

  --font-sans: 'Inter', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  --nav-height: 68px;
  --section-pad: 100px;
  --banner-height: 40px;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--nav-height) + var(--banner-height));
}

/* ============================
   TEST BANNER
   ============================ */
#test-banner {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1100;
  height: var(--banner-height);
  background: repeating-linear-gradient(
    -45deg,
    rgba(234, 179, 8, 0.12) 0px,
    rgba(234, 179, 8, 0.12) 8px,
    rgba(0,0,0,0) 8px,
    rgba(0,0,0,0) 16px
  ), #1a1500;
  border-bottom: 1px solid rgba(234, 179, 8, 0.4);
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 0 20px;
}

#test-banner svg {
  width: 16px;
  height: 16px;
  color: #eab308;
  flex-shrink: 0;
}

#test-banner span {
  font-size: 0.78rem;
  font-family: var(--font-mono);
  color: #eab308;
  letter-spacing: 0.02em;
  text-align: center;
}

body {
  font-family: var(--font-sans);
  background: var(--bg-900);
  color: var(--text-primary);
  line-height: 1.65;
  font-size: 16px;
  overflow-x: hidden;
}

/* ============================
   TYPOGRAPHY
   ============================ */
h1, h2, h3 {
  font-weight: 700;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 { font-size: clamp(2.4rem, 5vw, 3.8rem); }
h2 { font-size: clamp(1.8rem, 3.5vw, 2.6rem); }
h3 { font-size: 1.2rem; }

p { color: var(--text-secondary); }

a {
  color: inherit;
  text-decoration: none;
  transition: color 0.2s;
}

.gradient-text {
  background: linear-gradient(135deg, var(--accent) 0%, var(--accent-light) 50%, #a78bfa 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============================
   LAYOUT
   ============================ */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: var(--section-pad) 0;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent);
  letter-spacing: 0.05em;
  margin-bottom: 16px;
  opacity: 0.9;
}

.section-title {
  margin-bottom: 12px;
}

.section-sub {
  font-size: 1.05rem;
  color: var(--text-secondary);
  margin-bottom: 56px;
}

/* ============================
   BUTTONS
   ============================ */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-size: 0.95rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.22s ease;
  border: none;
  font-family: var(--font-sans);
}

.btn-primary {
  background: var(--accent);
  color: #fff;
  box-shadow: 0 0 24px rgba(79, 142, 247, 0.3);
}

.btn-primary:hover {
  background: var(--accent-light);
  box-shadow: 0 0 36px rgba(79, 142, 247, 0.5);
  transform: translateY(-1px);
}

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

.btn-ghost:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

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

/* ============================
   NAVBAR
   ============================ */
#navbar {
  position: fixed;
  top: var(--banner-height);
  left: 0;
  right: 0;
  z-index: 1000;
  height: var(--nav-height);
  border-bottom: 1px solid transparent;
  transition: background 0.3s, border-color 0.3s, backdrop-filter 0.3s;
}

#navbar.scrolled {
  background: rgba(10, 11, 15, 0.88);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom-color: var(--border);
}

.nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-mono);
  font-size: 1.2rem;
  font-weight: 500;
  letter-spacing: -0.02em;
  color: var(--text-primary);
}

.logo-bracket { color: var(--text-muted); }
.logo-accent { color: var(--accent); }

.nav-links {
  display: flex;
  align-items: center;
  gap: 8px;
  list-style: none;
}

.nav-links a {
  padding: 8px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.9rem;
  color: var(--text-secondary);
  transition: all 0.2s;
}

.nav-links a:hover { color: var(--text-primary); background: var(--bg-600); }

.btn-nav {
  background: var(--accent) !important;
  color: #fff !important;
  padding: 9px 20px !important;
  font-weight: 500;
}

.btn-nav:hover { background: var(--accent-light) !important; }

.nav-end {
  display: flex;
  align-items: center;
  gap: 8px;
}

.lang-toggle {
  background: var(--bg-600);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  font-family: var(--font-mono);
  font-size: 0.76rem;
  font-weight: 600;
  letter-spacing: 0.08em;
  padding: 6px 13px;
  cursor: pointer;
  transition: all 0.2s;
}

.lang-toggle:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

.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(--text-primary);
  border-radius: 2px;
  transition: all 0.25s;
}

/* ============================
   HERO
   ============================ */
#hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: calc(var(--nav-height) + var(--banner-height)) 0 80px;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  background:
    radial-gradient(ellipse 80% 60% at 60% 30%, rgba(79, 142, 247, 0.12) 0%, transparent 60%),
    radial-gradient(ellipse 60% 50% at 20% 80%, rgba(167, 139, 250, 0.07) 0%, transparent 55%);
  pointer-events: none;
}

.hero-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: radial-gradient(ellipse 80% 80% at 50% 20%, black 30%, transparent 80%);
  pointer-events: none;
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: 780px;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  background: var(--bg-700);
  border: 1px solid var(--border);
  border-radius: 50px;
  padding: 7px 16px;
  font-size: 0.82rem;
  color: var(--text-secondary);
  margin-bottom: 28px;
}

.status-dot {
  width: 8px;
  height: 8px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 8px var(--green);
  animation: pulse-dot 2.5s ease-in-out infinite;
}

@keyframes pulse-dot {
  0%, 100% { opacity: 1; box-shadow: 0 0 8px var(--green); }
  50% { opacity: 0.6; box-shadow: 0 0 16px var(--green); }
}

h1 { margin-bottom: 20px; }

.hero-sub {
  font-size: 1.15rem;
  color: var(--text-secondary);
  max-width: 600px;
  margin-bottom: 36px;
  line-height: 1.7;
}

.hero-actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

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

.stat {
  display: flex;
  flex-direction: column;
  padding: 0 32px 0 0;
}

.stat:first-child { padding-left: 0; }

.stat-num {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1;
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

.stat-divider {
  width: 1px;
  height: 36px;
  background: var(--border);
  margin-right: 32px;
}

.scroll-indicator {
  position: absolute;
  bottom: 32px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
}

.scroll-line {
  width: 1px;
  height: 48px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scroll-anim 2s ease-in-out infinite;
}

@keyframes scroll-anim {
  0% { opacity: 0; transform: scaleY(0); transform-origin: top; }
  50% { opacity: 1; transform: scaleY(1); }
  100% { opacity: 0; transform: scaleY(0); transform-origin: bottom; }
}

/* ============================
   ABOUT
   ============================ */
#about {
  background: var(--bg-800);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 64px;
  align-items: center;
}

.about-text h2 { margin-bottom: 20px; }

.about-text p {
  margin-bottom: 16px;
  font-size: 1rem;
  line-height: 1.75;
}

.tech-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 28px;
}

.tech-tag {
  background: var(--bg-600);
  border: 1px solid var(--border);
  padding: 6px 14px;
  border-radius: 50px;
  font-size: 0.82rem;
  font-family: var(--font-mono);
  color: var(--text-secondary);
  transition: all 0.2s;
}

.tech-tag:hover {
  border-color: var(--accent);
  color: var(--accent);
  background: var(--accent-glow);
}

/* Terminal Card */
.card-terminal {
  background: var(--bg-700);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: 0 24px 64px rgba(0,0,0,0.4);
}

.terminal-bar {
  display: flex;
  align-items: center;
  gap: 7px;
  background: var(--bg-600);
  padding: 12px 16px;
  border-bottom: 1px solid var(--border);
}

.t-dot {
  width: 12px;
  height: 12px;
  border-radius: 50%;
}

.t-dot.red { background: #ff5f57; }
.t-dot.yellow { background: #ffbd2e; }
.t-dot.green { background: #28ca41; }

.t-title {
  margin-left: 8px;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
}

.terminal-body {
  padding: 20px 22px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  line-height: 2;
}

.terminal-body p { color: var(--text-secondary); margin: 0; }

.t-prompt {
  color: var(--accent);
  margin-right: 10px;
}

.t-out {
  padding-left: 20px;
  color: var(--text-muted) !important;
}

.t-green { color: var(--green) !important; }

.cursor {
  display: inline-block;
  width: 2px;
  height: 1em;
  background: var(--green);
  margin-left: 2px;
  vertical-align: text-bottom;
  animation: blink 1.1s step-end infinite;
}

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

/* ============================
   SERVICES
   ============================ */
#services {
  background: var(--bg-900);
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.service-card {
  position: relative;
  background: var(--bg-700);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  transition: all 0.28s ease;
}

.service-card:hover {
  border-color: var(--border-hover);
  background: var(--bg-600);
  transform: translateY(-3px);
  box-shadow: 0 16px 48px rgba(0,0,0,0.3), 0 0 0 1px rgba(79, 142, 247, 0.1);
}

.service-card.featured {
  border-color: rgba(79, 142, 247, 0.4);
  background: linear-gradient(145deg, var(--bg-600) 0%, rgba(79, 142, 247, 0.05) 100%);
}

.featured-badge {
  position: absolute;
  top: 16px;
  right: 16px;
  background: var(--accent);
  color: #fff;
  font-size: 0.7rem;
  font-weight: 600;
  padding: 3px 10px;
  border-radius: 50px;
  letter-spacing: 0.04em;
}

.service-icon {
  width: 48px;
  height: 48px;
  background: var(--accent-glow);
  border: 1px solid rgba(79, 142, 247, 0.2);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 18px;
}

.service-icon svg {
  width: 22px;
  height: 22px;
  color: var(--accent);
}

.service-card h3 {
  margin-bottom: 10px;
  font-size: 1.05rem;
}

.service-card p {
  font-size: 0.88rem;
  line-height: 1.7;
  margin-bottom: 16px;
}

.service-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 6px;
}

.service-list li {
  font-size: 0.82rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 8px;
}

.service-list li::before {
  content: '';
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background: var(--accent);
  flex-shrink: 0;
}

/* ============================
   PORTFOLIO
   ============================ */
#portfolio {
  background: var(--bg-800);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.portfolio-card {
  background: var(--bg-700);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  transition: all 0.28s ease;
  cursor: default;
}

.portfolio-card:hover {
  border-color: var(--border-hover);
  transform: translateY(-3px);
  box-shadow: 0 12px 36px rgba(0,0,0,0.3);
}

.portfolio-top {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 16px;
}

.portfolio-icon {
  width: 42px;
  height: 42px;
  background: var(--bg-500);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
}

.portfolio-icon svg {
  width: 20px;
  height: 20px;
  color: var(--accent);
}

.portfolio-tags {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
  justify-content: flex-end;
}

.p-tag {
  background: var(--bg-500);
  border: 1px solid var(--border);
  padding: 3px 10px;
  border-radius: 50px;
  font-size: 0.72rem;
  font-family: var(--font-mono);
  color: var(--text-muted);
}

.portfolio-card h3 {
  font-size: 1rem;
  margin-bottom: 10px;
}

.portfolio-card p {
  font-size: 0.86rem;
  line-height: 1.65;
  margin-bottom: 16px;
}

.portfolio-result {
  font-size: 0.82rem;
  color: var(--text-muted);
  border-top: 1px solid var(--border);
  padding-top: 12px;
}

.result-label {
  color: var(--green);
  font-weight: 600;
  margin-right: 4px;
}

/* ============================
   CONTACT
   ============================ */
#contact {
  background: var(--bg-900);
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.6fr;
  gap: 56px;
  align-items: start;
}

.contact-info {
  display: flex;
  flex-direction: column;
  gap: 24px;
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: 14px;
}

.contact-icon {
  width: 42px;
  height: 42px;
  background: var(--bg-700);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.contact-icon svg {
  width: 18px;
  height: 18px;
  color: var(--accent);
}

.contact-label {
  font-size: 0.78rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 3px;
}

.contact-value {
  font-size: 0.95rem;
  color: var(--text-primary);
}

a.contact-value:hover { color: var(--accent); }

.availability-box {
  display: flex;
  align-items: flex-start;
  gap: 14px;
  background: var(--green-dim);
  border: 1px solid rgba(34, 213, 90, 0.25);
  border-radius: var(--radius);
  padding: 18px;
  margin-top: 8px;
}

.avail-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--green);
  box-shadow: 0 0 10px var(--green);
  margin-top: 4px;
  flex-shrink: 0;
  animation: pulse-dot 2.5s ease-in-out infinite;
}

.avail-title {
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--green);
  margin-bottom: 3px;
}

.avail-sub {
  font-size: 0.82rem;
  color: var(--text-muted);
}

/* Contact Form */
.contact-form {
  background: var(--bg-700);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 7px;
}

.form-group label {
  font-size: 0.82rem;
  font-weight: 500;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
}

.form-group input,
.form-group textarea {
  background: var(--bg-600);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 14px;
  color: var(--text-primary);
  font-family: var(--font-sans);
  font-size: 0.9rem;
  transition: border-color 0.2s, box-shadow 0.2s;
  outline: none;
  resize: vertical;
}

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

.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(79, 142, 247, 0.12);
}

.form-notice {
  font-size: 0.75rem;
  color: var(--text-muted);
  text-align: center;
}

/* ============================
   FOOTER
   ============================ */
footer {
  background: var(--bg-800);
  border-top: 1px solid var(--border);
  padding: 36px 0;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 16px;
}

.footer-logo {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
}

.footer-copy {
  font-size: 0.82rem;
  color: var(--text-muted);
}

.footer-links {
  display: flex;
  gap: 20px;
}

.footer-links a {
  font-size: 0.85rem;
  color: var(--text-muted);
  transition: color 0.2s;
}

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

/* ============================
   ANIMATIONS
   ============================ */
.fade-in {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in.visible {
  opacity: 1;
  transform: translateY(0);
}

/* ============================
   RESPONSIVE
   ============================ */
@media (max-width: 900px) {
  :root { --section-pad: 72px; }

  .about-grid { grid-template-columns: 1fr; gap: 40px; }
  .services-grid { grid-template-columns: 1fr 1fr; }
  .portfolio-grid { grid-template-columns: 1fr 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 36px; }
}

@media (max-width: 640px) {
  :root { --section-pad: 56px; }

  .nav-links {
    display: none;
    flex-direction: column;
    position: fixed;
    top: calc(var(--banner-height) + var(--nav-height));
    left: 0;
    right: 0;
    background: rgba(10, 11, 15, 0.97);
    backdrop-filter: blur(16px);
    padding: 20px 24px 28px;
    border-bottom: 1px solid var(--border);
    gap: 4px;
  }

  .nav-links.open { display: flex; }
  .nav-toggle { display: flex; }

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

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

  .footer-inner { flex-direction: column; align-items: flex-start; }
}