/* ===========================
   PORTFOLIO BTS SIO SISR
   Design: Terminal / Brutalist Tech
   =========================== */

:root {
  --bg: #0a0a0f;
  --surface: #111118;
  --surface2: #1a1a24;
  --border: #2a2a3a;
  --text: #e8e8f0;
  --text-muted: #7070a0;
  --accent: #00ff88;
  --accent2: #00aaff;
  --accent3: #ff6b35;
  --font-mono: 'Space Mono', monospace;
  --font-display: 'Syne', sans-serif;
}

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

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-mono);
  font-size: 14px;
  line-height: 1.7;
  overflow-x: hidden;
}

/* ======= LOADER ======= */
.loader {
  position: fixed; inset: 0;
  background: var(--bg);
  z-index: 9999;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  gap: 20px;
  transition: opacity 0.5s ease, visibility 0.5s ease;
}
.loader.hidden { opacity: 0; visibility: hidden; }
.loader__text {
  font-family: var(--font-display);
  font-size: 3rem;
  font-weight: 800;
  letter-spacing: 8px;
  color: var(--accent);
}
.loader__bar {
  width: 300px; height: 3px;
  background: var(--border);
  border-radius: 2px; overflow: hidden;
}
.loader__fill {
  height: 100%;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  animation: load 1.5s ease forwards;
}
@keyframes load { from { width: 0; } to { width: 100%; } }

/* ======= SCROLLBAR ======= */
::-webkit-scrollbar { width: 4px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--accent); border-radius: 2px; }

/* ======= NAV ======= */
.nav {
  position: fixed; top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex; align-items: center; gap: 2rem;
  padding: 1.2rem 3rem;
  background: rgba(10, 10, 15, 0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
  transition: all 0.3s ease;
}
.nav.scrolled { padding: 0.8rem 3rem; }
.nav__logo {
  font-family: var(--font-display);
  font-size: 1.4rem;
  font-weight: 800;
  color: var(--text);
  margin-right: auto;
}
.nav__links {
  display: flex; gap: 2rem; list-style: none;
}
.nav__links a {
  color: var(--text-muted);
  text-decoration: none;
  font-size: 0.75rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  transition: color 0.2s;
}
.nav__links a:hover { color: var(--accent); }
.nav__status {
  display: flex; align-items: center; gap: 6px;
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 1px;
}
.dot {
  width: 7px; height: 7px;
  background: var(--accent);
  border-radius: 50%;
  animation: pulse 2s infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.4; transform: scale(0.8); }
}
.accent { color: var(--accent); }

/* ======= BLINK ======= */
.blink { animation: blink 1s step-end infinite; }
@keyframes blink { 50% { opacity: 0; } }

/* ======= HERO ======= */
.hero {
  min-height: 100vh;
  display: flex; flex-direction: column;
  justify-content: center;
  padding: 6rem 3rem 3rem;
  position: relative;
  overflow: hidden;
}
.hero__grid-lines {
  position: absolute; inset: 0;
  background-image:
    linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.25;
  pointer-events: none;
}
.hero__grid-lines::after {
  content: '';
  position: absolute; inset: 0;
  background: radial-gradient(ellipse at 20% 50%, rgba(0,255,136,0.06) 0%, transparent 60%),
              radial-gradient(ellipse at 80% 20%, rgba(0,170,255,0.05) 0%, transparent 50%);
}
.hero__tag {
  font-size: 0.7rem;
  letter-spacing: 3px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeUp 0.6s 1.8s ease forwards;
}
.hero__name {
  font-family: var(--font-display);
  font-size: clamp(4rem, 12vw, 9rem);
  font-weight: 800;
  line-height: 0.9;
  margin-bottom: 1.5rem;
  opacity: 0;
  animation: fadeUp 0.6s 2s ease forwards;
}
.outline {
  -webkit-text-stroke: 2px var(--text);
  color: transparent;
}
.hero__subtitle {
  font-size: 1rem;
  color: var(--text-muted);
  margin-bottom: 2.5rem;
  opacity: 0;
  animation: fadeUp 0.6s 2.2s ease forwards;
}
.hero__actions {
  display: flex; gap: 1rem; flex-wrap: wrap;
  opacity: 0;
  animation: fadeUp 0.6s 2.4s ease forwards;
}
.hero__badges {
  position: absolute;
  right: 3rem; bottom: 6rem;
  display: flex; flex-direction: column; gap: 0.5rem;
  opacity: 0;
  animation: fadeIn 0.6s 2.8s ease forwards;
}
.badge {
  padding: 0.3rem 0.8rem;
  border: 1px solid var(--border);
  font-size: 0.65rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
  background: var(--surface);
  transition: all 0.2s;
}
.badge:hover { border-color: var(--accent); color: var(--accent); }
.hero__scroll {
  position: absolute; left: 3rem; bottom: 3rem;
  display: flex; flex-direction: column; align-items: center; gap: 10px;
  font-size: 0.6rem; letter-spacing: 3px;
  color: var(--text-muted);
  opacity: 0;
  animation: fadeIn 0.6s 3s ease forwards;
}
.hero__scroll-line {
  width: 1px; height: 60px;
  background: linear-gradient(to bottom, var(--text-muted), transparent);
  animation: scrollLine 2s ease infinite;
}
@keyframes scrollLine {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ======= BUTTONS ======= */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 0.75rem 1.75rem;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 2px;
  text-transform: uppercase;
  text-decoration: none;
  border: none; cursor: pointer;
  transition: all 0.2s ease;
}
.btn--primary {
  background: var(--accent);
  color: var(--bg);
}
.btn--primary:hover {
  background: transparent;
  outline: 2px solid var(--accent);
  color: var(--accent);
}
.btn--ghost {
  background: transparent;
  outline: 1px solid var(--border);
  color: var(--text-muted);
}
.btn--ghost:hover {
  outline-color: var(--accent2);
  color: var(--accent2);
}

/* ======= SECTIONS ======= */
.section {
  padding: 6rem 3rem;
  max-width: 1200px;
  margin: 0 auto;
}
.section__label {
  font-size: 0.65rem;
  letter-spacing: 4px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 1.5rem;
}
.section h2 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 5vw, 3.5rem);
  font-weight: 800;
  line-height: 1.1;
  margin-bottom: 3rem;
}
.section h2 em { font-style: italic; color: var(--accent); }

/* ======= ABOUT ======= */
.about__grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 4rem;
  align-items: start;
}
.about__text h2 { font-family: var(--font-display); font-weight: 800; font-size: 2.5rem; line-height: 1.1; margin-bottom: 1.5rem; }
.about__text p { color: var(--text-muted); margin-bottom: 1rem; line-height: 1.8; }
.about__text strong { color: var(--text); }
.about__info {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1rem;
  margin-top: 2rem;
  padding-top: 2rem;
  border-top: 1px solid var(--border);
}
.about__info-item {
  display: flex; flex-direction: column; gap: 4px;
}
.about__info-item .label {
  font-size: 0.65rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
}
.about__info-item span:last-child { color: var(--text); font-size: 0.85rem; }

/* ======= TERMINAL ======= */
.terminal {
  background: #0d0d14;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  font-size: 0.8rem;
  box-shadow: 0 25px 60px rgba(0,0,0,0.5);
  position: sticky; top: 6rem;
}
.terminal__bar {
  display: flex; align-items: center; gap: 6px;
  padding: 0.75rem 1rem;
  background: var(--surface2);
  border-bottom: 1px solid var(--border);
}
.terminal__dot {
  width: 12px; height: 12px; border-radius: 50%;
}
.terminal__dot.red { background: #ff5f57; }
.terminal__dot.yellow { background: #febc2e; }
.terminal__dot.green { background: #28c840; }
.terminal__title {
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-left: auto;
  margin-right: auto;
}
.terminal__body { padding: 1.25rem; }
.terminal__body p { margin-bottom: 4px; }
.prompt { color: var(--accent); margin-right: 8px; }
.output { color: var(--text-muted); padding-left: 1.2rem; }

/* ======= SKILLS ======= */
.skills__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
  gap: 1.5rem;
}
.skill-card {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 2rem;
  transition: all 0.3s ease;
  position: relative;
  overflow: hidden;
}
.skill-card::before {
  content: '';
  position: absolute; top: 0; left: 0;
  width: 3px; height: 0;
  background: var(--accent);
  transition: height 0.3s ease;
}
.skill-card:hover { border-color: var(--accent); background: var(--surface2); }
.skill-card:hover::before { height: 100%; }
.skill-card__icon { font-size: 1.8rem; margin-bottom: 1rem; }
.skill-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 1rem;
  color: var(--text);
}
.skill-card ul {
  list-style: none;
  display: flex; flex-direction: column; gap: 4px;
  margin-bottom: 1.5rem;
}
.skill-card ul li {
  color: var(--text-muted);
  font-size: 0.8rem;
  padding-left: 1rem;
  position: relative;
}
.skill-card ul li::before {
  content: '→';
  position: absolute; left: 0;
  color: var(--accent);
}
.skill-card__level {
  display: flex; align-items: center; gap: 1rem;
}
.level-bar {
  flex: 1; height: 3px;
  background: var(--border);
  border-radius: 2px;
  position: relative;
  overflow: hidden;
}
.level-bar::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  transform: scaleX(0); transform-origin: left;
  transition: transform 1s ease;
  width: var(--w);
}
.skill-card:hover .level-bar::after { transform: scaleX(1); }
.skill-card__level span:last-child {
  font-size: 0.65rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
  white-space: nowrap;
}

/* ======= PROJECTS ======= */
.projects__grid {
  display: grid;
  grid-template-columns: repeat(12, 1fr);
  gap: 1.5rem;
}
.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 2rem;
  transition: all 0.3s ease;
}
.project-card--featured {
  grid-column: 1 / 8;
  border-color: var(--accent);
  background: linear-gradient(135deg, rgba(0,255,136,0.04), var(--surface));
}
.project-card:nth-child(2) { grid-column: 8 / 13; }
.project-card:nth-child(3) { grid-column: 1 / 5; }
.project-card:nth-child(4) { grid-column: 5 / 9; }
.project-card:nth-child(5) { grid-column: 9 / 13; }
.project-card:hover {
  border-color: var(--accent2);
  transform: translateY(-4px);
  box-shadow: 0 20px 40px rgba(0,0,0,0.3);
}
.project-card__tag {
  font-size: 0.65rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.75rem;
}
.project-card h3 {
  font-family: var(--font-display);
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  line-height: 1.3;
}
.project-card p {
  color: var(--text-muted);
  font-size: 0.8rem;
  margin-bottom: 1.25rem;
  line-height: 1.7;
}
.project-card__tech {
  display: flex; flex-wrap: wrap; gap: 6px;
  margin-bottom: 1.25rem;
}
.project-card__tech span {
  font-size: 0.65rem;
  padding: 2px 8px;
  background: var(--surface2);
  border: 1px solid var(--border);
  color: var(--text-muted);
  letter-spacing: 1px;
}
.project-card__links {
  display: flex; gap: 1.5rem;
}
.link {
  font-size: 0.75rem;
  color: var(--accent2);
  text-decoration: none;
  letter-spacing: 1px;
  transition: color 0.2s;
}
.link:hover { color: var(--accent); }

/* ======= FORMATION ======= */
.formation__intro {
  color: var(--text-muted);
  max-width: 600px;
  margin-bottom: 3rem;
  line-height: 1.8;
}
.formation__grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: 1.5rem;
  margin-bottom: 3rem;
}
.formation-card {
  border: 1px solid var(--border);
  padding: 2rem;
  background: var(--surface);
  position: relative;
  overflow: hidden;
  transition: all 0.3s ease;
}
.formation-card:hover { border-color: var(--accent3); }
.formation-card__num {
  font-family: var(--font-display);
  font-size: 4rem;
  font-weight: 800;
  color: var(--surface2);
  position: absolute;
  top: -10px; right: 10px;
  line-height: 1;
  transition: color 0.3s;
}
.formation-card:hover .formation-card__num { color: rgba(255,107,53,0.15); }
.formation-card h3 {
  font-family: var(--font-display);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--text);
}
.formation-card p {
  font-size: 0.8rem;
  color: var(--text-muted);
  line-height: 1.7;
  margin-bottom: 1rem;
}
.formation-card__date {
  font-size: 0.65rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--accent3);
}
.formation__sources {
  display: flex; align-items: center; gap: 1rem; flex-wrap: wrap;
  padding: 1.5rem;
  border: 1px solid var(--border);
  background: var(--surface);
}
.formation__sources .label {
  font-size: 0.65rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: var(--text-muted);
}
.formation__sources a {
  font-size: 0.75rem;
  color: var(--accent2);
  text-decoration: none;
  padding: 2px 10px;
  border: 1px solid var(--border);
  transition: all 0.2s;
}
.formation__sources a:hover { border-color: var(--accent2); background: rgba(0,170,255,0.05); }

/* ======= CONTACT ======= */
.contact {
  background: var(--surface);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  max-width: 100%;
}
.contact__inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0;
}
.contact p {
  color: var(--text-muted);
  max-width: 500px;
  margin-bottom: 3rem;
  line-height: 1.8;
}
.contact__links {
  display: flex; flex-direction: column; gap: 1rem;
}
.contact__link {
  display: flex; align-items: center; gap: 1rem;
  text-decoration: none;
  color: var(--text);
  font-size: 0.9rem;
  padding: 1rem 1.5rem;
  border: 1px solid var(--border);
  background: var(--bg);
  transition: all 0.2s ease;
  max-width: 400px;
}
.contact__link:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateX(8px);
}
.contact__link-icon { font-size: 1.2rem; }

/* ======= FOOTER ======= */
.footer {
  padding: 2rem 3rem;
  display: flex; justify-content: space-between; align-items: center;
  border-top: 1px solid var(--border);
}
.footer__left, .footer__right a {
  font-size: 0.7rem;
  letter-spacing: 1px;
  color: var(--text-muted);
  text-decoration: none;
}
.footer__right a:hover { color: var(--accent); }

/* ======= ANIMATIONS ======= */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}
.reveal {
  opacity: 0; transform: translateY(30px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible { opacity: 1; transform: none; }

/* ======= RESPONSIVE ======= */
@media (max-width: 900px) {
  .nav { padding: 1rem 1.5rem; }
  .nav__links { display: none; }
  .hero { padding: 5rem 1.5rem 3rem; }
  .hero__badges { display: none; }
  .section { padding: 4rem 1.5rem; }
  .about__grid { grid-template-columns: 1fr; }
  .terminal { position: static; }
  .projects__grid { grid-template-columns: 1fr; }
  .project-card,
  .project-card--featured,
  .project-card:nth-child(2),
  .project-card:nth-child(3),
  .project-card:nth-child(4),
  .project-card:nth-child(5) {
    grid-column: 1 / -1;
  }
  .footer { flex-direction: column; gap: 1rem; text-align: center; }
}