/* ============================================================
   style.css — Arturo Esteva Castillo Portfolio
   Dark, minimal, editorial
   ============================================================ */

:root {
  --bg:         #0a0a0a;
  --bg-2:       #111111;
  --bg-3:       #161616;
  --surface:    #1a1a1a;
  --border:     rgba(255,255,255,0.07);
  --border-2:   rgba(255,255,255,0.12);
  --text:       #e8e8e2;
  --text-muted: #6b6b65;
  --text-dim:   #3a3a36;
  --accent:     #c8f542;
  --accent-dim: rgba(200,245,66,0.08);
  --font-head:  'Syne', sans-serif;
  --font-body:  'DM Sans', sans-serif;
  --font-mono:  'DM Mono', monospace;
}

*, *::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-body);
  font-size: 16px;
  line-height: 1.7;
  font-weight: 300;
  overflow-x: hidden;
}

/* ============================================================
   NAV
   ============================================================ */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 3rem;
  background: rgba(10,10,10,0.85);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  letter-spacing: 0.15em;
  color: var(--accent);
}

.nav-links {
  list-style: none;
  display: flex;
  gap: 2.5rem;
}

.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  text-decoration: none;
  text-transform: uppercase;
  transition: color 0.2s;
}

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

/* ============================================================
   HERO
   ============================================================ */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 8rem 3rem 4rem;
  overflow: hidden;
}

.hero-bg-grid {
  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;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 50%, black, transparent);
  pointer-events: none;
}

.hero-content {
  position: relative;
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  gap: 4rem;
}

.hero-eyebrow {
  position: absolute;
  top: -3rem;
  left: 0;
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  display: flex;
  align-items: center;
  gap: 0.6rem;
  letter-spacing: 0.05em;
}

.dot {
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--accent);
  display: inline-block;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.4; transform: scale(0.8); }
}

.hero-name {
  font-family: var(--font-head);
  font-size: clamp(4rem, 10vw, 8.5rem);
  font-weight: 800;
  line-height: 0.92;
  letter-spacing: -0.03em;
  flex: 1;
}

.hero-name .outline {
  -webkit-text-stroke: 1px var(--text);
  color: transparent;
}

.hero-right {
  flex: 0 0 320px;
  display: flex;
  flex-direction: column;
  gap: 2rem;
  padding-bottom: 0.5rem;
}

.hero-role {
  font-family: var(--font-mono);
  font-size: 0.9rem;
  color: var(--text-muted);
  line-height: 1.6;
  letter-spacing: 0.03em;
  border-left: 1px solid var(--accent);
  padding-left: 1rem;
}

.hero-tagline {
  font-family: var(--font-head);
  font-size: 1.6rem;
  font-weight: 600;
  line-height: 1.2;
  color: var(--text);
}

.btn-primary {
  display: inline-block;
  padding: 0.9rem 2rem;
  background: var(--accent);
  color: #0a0a0a;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  text-decoration: none;
  border-radius: 2px;
  transition: opacity 0.2s, transform 0.2s;
  width: fit-content;
}

.btn-primary:hover { opacity: 0.85; transform: translateY(-1px); }

.hero-scroll {
  position: absolute;
  bottom: 3rem;
  left: 3rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

.hero-scroll span {
  font-family: var(--font-mono);
  font-size: 0.65rem;
  color: var(--text-dim);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  writing-mode: vertical-rl;
}

.scroll-line {
  width: 1px;
  height: 60px;
  background: linear-gradient(to bottom, var(--border-2), transparent);
  animation: scrollDown 2s ease-in-out infinite;
}

@keyframes scrollDown {
  0%   { transform: scaleY(0); transform-origin: top; }
  50%  { transform: scaleY(1); transform-origin: top; }
  51%  { transform: scaleY(1); transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ============================================================
   SECTIONS
   ============================================================ */
.section {
  padding: 8rem 3rem;
  max-width: 1200px;
  margin: 0 auto;
}

.section.section-dark {
  max-width: 100%;
  background: var(--bg-2);
  padding: 8rem 3rem;
}

.section.section-dark > * {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
}

.section-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 0.15em;
  text-transform: uppercase;
  margin-bottom: 3rem;
}

.section-title {
  font-family: var(--font-head);
  font-size: clamp(2rem, 4vw, 3.2rem);
  font-weight: 700;
  line-height: 1.1;
  letter-spacing: -0.02em;
  margin-bottom: 3rem;
}

.section-title.centered { text-align: center; }

.section-title .outline {
  -webkit-text-stroke: 1px var(--text);
  color: transparent;
}

/* ============================================================
   ABOUT
   ============================================================ */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
  align-items: start;
}

.about-right p {
  color: var(--text-muted);
  margin-bottom: 1.25rem;
  font-size: 0.97rem;
}

.about-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 2rem;
}

.about-tags span {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--accent);
  border: 1px solid rgba(200,245,66,0.25);
  padding: 0.35rem 0.85rem;
  border-radius: 2px;
  letter-spacing: 0.08em;
}

/* ============================================================
   SKILLS
   ============================================================ */
.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1px;
  background: var(--border);
  border: 1px solid var(--border);
  margin-top: 3rem;
}

.skill-card {
  background: var(--bg-2);
  padding: 2.5rem 2rem;
  transition: background 0.2s;
}

.skill-card:hover { background: var(--bg-3); }

.skill-icon {
  font-size: 1.4rem;
  margin-bottom: 1.2rem;
  color: var(--accent);
  opacity: 0.8;
}

.skill-card h3 {
  font-family: var(--font-head);
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 1rem;
  color: var(--text);
}

.skill-card ul {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.45rem;
}

.skill-card ul li {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
  padding-left: 0.8rem;
  position: relative;
}

.skill-card ul li::before {
  content: '—';
  position: absolute;
  left: 0;
  color: var(--text-dim);
  font-size: 0.65rem;
}

/* ============================================================
   TIMELINE
   ============================================================ */
.timeline {
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 0;
  padding-left: 2rem;
  border-left: 1px solid var(--border);
}

.timeline-item {
  position: relative;
  padding: 2.5rem 0 2.5rem 3rem;
  border-bottom: 1px solid var(--border);
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}

.timeline-item.visible {
  opacity: 1;
  transform: translateY(0);
}

.timeline-item:last-child { border-bottom: none; }

.timeline-dot {
  position: absolute;
  left: -2.55rem;
  top: 2.9rem;
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: var(--accent);
  border: 2px solid var(--bg);
}

.timeline-company {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.08em;
  display: block;
  margin-bottom: 0.5rem;
}

.timeline-body h3 {
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 600;
  margin-bottom: 0.3rem;
}

.timeline-location {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  margin-bottom: 0.8rem;
}

.timeline-body p:last-child {
  font-size: 0.92rem;
  color: var(--text-muted);
  max-width: 600px;
}

/* ============================================================
   PROJECTS
   ============================================================ */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-top: 3rem;
}

.project-card {
  display: block;
  background: var(--surface);
  border: 1px solid var(--border);
  padding: 2.5rem 2rem;
  text-decoration: none;
  color: var(--text);
  border-radius: 2px;
  transition: border-color 0.2s, background 0.2s, transform 0.2s;
  position: relative;
  overflow: hidden;
}

.project-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 1px;
  background: var(--accent);
  transform: scaleX(0);
  transform-origin: left;
  transition: transform 0.3s ease;
}

.project-card:hover::before { transform: scaleX(1); }
.project-card:hover {
  border-color: var(--border-2);
  background: var(--bg-3);
  transform: translateY(-3px);
}

.project-card--highlight {
  border-color: rgba(200,245,66,0.2);
  background: var(--accent-dim);
}

.project-number {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-dim);
  margin-bottom: 1.2rem;
  letter-spacing: 0.1em;
}

.project-card h3 {
  font-family: var(--font-head);
  font-size: 1.15rem;
  font-weight: 600;
  margin-bottom: 0.8rem;
  color: var(--text);
}

.project-card p {
  font-size: 0.88rem;
  color: var(--text-muted);
  margin-bottom: 1.5rem;
  line-height: 1.65;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.4rem;
  margin-bottom: 1.5rem;
}

.project-tags span {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-muted);
  background: var(--bg);
  border: 1px solid var(--border);
  padding: 0.25rem 0.6rem;
  border-radius: 2px;
}

.project-link {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--accent);
  letter-spacing: 0.05em;
}

/* ============================================================
   CONTACT
   ============================================================ */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 6rem;
  align-items: center;
}

.contact-right p {
  font-size: 0.97rem;
  color: var(--text-muted);
  margin-bottom: 3rem;
  max-width: 400px;
}

.contact-links {
  display: flex;
  flex-direction: column;
  gap: 0;
  border-top: 1px solid var(--border);
}

.contact-link {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 1.5rem 0;
  border-bottom: 1px solid var(--border);
  text-decoration: none;
  transition: padding-left 0.2s;
}

.contact-link:hover { padding-left: 0.5rem; }

.contact-link-label {
  font-family: var(--font-head);
  font-size: 1.4rem;
  font-weight: 600;
  color: var(--text);
}

.contact-link-arrow {
  font-size: 1.2rem;
  color: var(--accent);
  transition: transform 0.2s;
}

.contact-link:hover .contact-link-arrow { transform: translate(3px, -3px); }

/* ============================================================
   FOOTER
   ============================================================ */
.footer {
  border-top: 1px solid var(--border);
  padding: 2rem 3rem;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.footer span {
  font-size: 0.8rem;
  color: var(--text-dim);
}

.footer-mono {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-dim);
  letter-spacing: 0.08em;
}

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .nav { padding: 1.25rem 1.5rem; }
  .nav-links { gap: 1.5rem; }

  .hero { padding: 7rem 1.5rem 4rem; }
  .hero-content { flex-direction: column; align-items: flex-start; gap: 2.5rem; }
  .hero-right { flex: none; width: 100%; }
  .hero-scroll { display: none; }

  .section, .section.section-dark { padding: 5rem 1.5rem; }

  .about-grid { grid-template-columns: 1fr; gap: 3rem; }
  .skills-grid { grid-template-columns: 1fr 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; gap: 3rem; }
  .footer { flex-direction: column; gap: 0.5rem; text-align: center; }
}

@media (max-width: 560px) {
  .nav-links { display: none; }
  .skills-grid { grid-template-columns: 1fr; }
  .hero-name { font-size: 3.5rem; }
}