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

:root {
  --accent:       #3b82f6;
  --accent-hover: #2563eb;
  --accent-dim:   rgba(59, 130, 246, 0.10);

  --bg-primary:   #ffffff;
  --bg-secondary: #f7f7f6;
  --bg-tertiary:  #f1f0ec;

  --text-primary:   #111110;
  --text-secondary: #5c5c57;
  --text-tertiary:  #999894;

  --border-light: rgba(0, 0, 0, 0.08);
  --border-mid:   rgba(0, 0, 0, 0.14);

  --mono: 'JetBrains Mono', 'Fira Code', 'Courier New', monospace;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

  --radius-sm: 6px;
  --radius-md: 8px;
  --radius-lg: 12px;
}

@media (prefers-color-scheme: dark) {
  :root {
    --bg-primary:   #111110;
    --bg-secondary: #1a1a18;
    --bg-tertiary:  #0d0d0c;

    --text-primary:   #eeede8;
    --text-secondary: #a09e99;
    --text-tertiary:  #666460;

    --border-light: rgba(255, 255, 255, 0.07);
    --border-mid:   rgba(255, 255, 255, 0.12);
  }
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--sans);
  background: var(--bg-tertiary);
  color: var(--text-primary);
  font-size: 15px;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
  text-decoration: none;
}

/* ===========================
   LAYOUT
=========================== */
.container {
  max-width: 900px;
  margin: 0 auto;
  padding: 0 1.5rem;
}

section {
  padding: 5rem 0;
  background: var(--bg-primary);
}

.section-alt {
  background: var(--bg-secondary);
  border-top:    1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

/* ===========================
   NAVIGATION
=========================== */
nav {
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-light);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 56px;
}

.logo {
  font-family: var(--mono);
  font-size: 14px;
  color: var(--accent);
  font-weight: 500;
  letter-spacing: -0.3px;
  cursor: pointer;
}

.nav-links {
  display: flex;
  gap: 1.5rem;
}

.nav-links a {
  font-size: 13px;
  color: var(--text-secondary);
  letter-spacing: 0.2px;
  transition: color 0.15s;
}

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

.nav-toggle {
  display: none;
  background: none;
  border: none;
  font-size: 20px;
  color: var(--text-primary);
  cursor: pointer;
}

/* ===========================
   HERO
=========================== */
.hero {
  padding: 6rem 0 5rem;
  background: var(--bg-primary);
  border-bottom: 1px solid var(--border-light);
}

.hero-label {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--accent);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 1.25rem;
  display: flex;
  align-items: center;
  gap: 8px;
}

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

@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50%       { opacity: 0.5; transform: scale(0.8); }
}

h1 {
  font-size: clamp(2rem, 5vw, 3.2rem);
  font-weight: 500;
  line-height: 1.15;
  letter-spacing: -1.5px;
  margin-bottom: 1rem;
  color: var(--text-primary);
}

.tagline {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 520px;
  margin-bottom: 2rem;
  line-height: 1.65;
}

.cta-row {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

.btn-primary {
  display: inline-block;
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 10px 22px;
  border-radius: var(--radius-md);
  font-size: 14px;
  font-weight: 500;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
  font-family: var(--sans);
}

.btn-primary:hover  { background: var(--accent-hover); }
.btn-primary:active { transform: scale(0.98); }

.btn-ghost {
  display: inline-block;
  border: 1px solid var(--border-mid);
  background: transparent;
  color: var(--text-primary);
  padding: 10px 22px;
  border-radius: var(--radius-md);
  font-size: 14px;
  cursor: pointer;
  transition: background 0.15s, transform 0.1s;
  font-family: var(--sans);
}

.btn-ghost:hover  { background: var(--bg-secondary); }
.btn-ghost:active { transform: scale(0.98); }

.terminal-hint {
  margin-top: 3rem;
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-tertiary);
  display: flex;
  align-items: center;
  gap: 8px;
}

.terminal-hint::before {
  content: '$';
  color: var(--accent);
}

.cursor {
  display: inline-block;
  width: 8px;
  height: 14px;
  background: var(--accent);
  animation: blink 1s step-end infinite;
  vertical-align: middle;
  margin-left: 2px;
}

@keyframes blink {
  50% { opacity: 0; }
}

/* ===========================
   SECTION LABEL
=========================== */
.section-label {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent);
  letter-spacing: 1.5px;
  text-transform: uppercase;
  margin-bottom: 2rem;
  display: flex;
  align-items: center;
  gap: 10px;
}

.section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-light);
}

/* ===========================
   ABOUT
=========================== */
.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.about-text {
  font-size: 15px;
  color: var(--text-secondary);
  line-height: 1.8;
}

.about-text p + p {
  margin-top: 1rem;
}

.about-text strong {
  color: var(--text-primary);
  font-weight: 500;
}

.stat-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 12px;
}

.stat-card {
  background: var(--bg-secondary);
  border-radius: var(--radius-md);
  padding: 1rem 1.1rem;
  border: 1px solid var(--border-light);
}

.stat-num {
  font-size: 1.6rem;
  font-weight: 500;
  letter-spacing: -0.5px;
  color: var(--text-primary);
}

.stat-label {
  font-size: 12px;
  color: var(--text-tertiary);
  margin-top: 2px;
}

/* ===========================
   SKILLS
=========================== */
.skills-groups {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.skill-group {
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
}

.skill-group-title {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-tertiary);
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
}

.tag {
  background: var(--bg-secondary);
  border: 1px solid var(--border-light);
  color: var(--text-secondary);
  font-size: 12px;
  padding: 4px 10px;
  border-radius: var(--radius-md);
  font-family: var(--mono);
  transition: border-color 0.15s, color 0.15s;
  cursor: default;
}

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

/* ===========================
   PROJECTS
=========================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, minmax(0, 1fr));
  gap: 1rem;
}

/* Proyecto destacado ocupa las 2 columnas */
.project-featured {
  grid-column: 1 / -1;
  border-color: var(--accent);
  background: var(--accent-dim);
}

.project-card {
  background: var(--bg-primary);
  border: 1px solid var(--border-light);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: border-color 0.2s, transform 0.2s;
  cursor: default;
}

.project-card:hover {
  border-color: var(--accent);
  transform: translateY(-2px);
}

.project-featured:hover {
  transform: none;
}

.project-top {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
}

.project-name {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.3px;
  color: var(--text-primary);
}

.project-links {
  display: flex;
  gap: 8px;
  flex-shrink: 0;
}

.icon-link {
  width: 28px;
  height: 28px;
  border: 1px solid var(--border-light);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-secondary);
  font-size: 13px;
  transition: border-color 0.15s, color 0.15s;
  cursor: pointer;
}

.icon-link:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.project-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.65;
  flex: 1;
}

.project-stack {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: auto;
}

/* ===========================
   EXPERIENCE / TIMELINE
=========================== */
.timeline {
  display: flex;
  flex-direction: column;
}

.timeline-item {
  display: grid;
  grid-template-columns: 140px 1px 1fr;
  gap: 0 1.5rem;
}

.timeline-date {
  font-family: var(--mono);
  font-size: 12px;
  color: var(--text-tertiary);
  text-align: right;
  padding-top: 3px;
}

.timeline-line {
  background: var(--border-light);
  position: relative;
}

.timeline-line::before {
  content: '';
  position: absolute;
  top: 6px;
  left: 50%;
  transform: translateX(-50%);
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--accent);
  margin-left: -0.5px;
}

.timeline-content {
  padding-bottom: 2.5rem;
}

.timeline-role {
  font-size: 15px;
  font-weight: 500;
  letter-spacing: -0.2px;
  color: var(--text-primary);
}

.timeline-company {
  font-size: 13px;
  color: var(--accent);
  margin-bottom: 0.4rem;
}

.timeline-desc {
  font-size: 13px;
  color: var(--text-secondary);
  line-height: 1.65;
  margin-bottom: 0.75rem;
}

.timeline-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
}

/* Stack tags compartidos entre projects y timeline */
.stack-tag {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-tertiary);
  background: var(--bg-secondary);
  padding: 3px 8px;
  border-radius: 4px;
  border: 1px solid var(--border-light);
}

/* ===========================
   CONTACT
=========================== */
.contact-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: start;
}

.contact-headline {
  font-size: 1.6rem;
  font-weight: 500;
  letter-spacing: -0.5px;
  margin-bottom: 0.75rem;
  color: var(--text-primary);
}

.contact-sub {
  font-size: 14px;
  color: var(--text-secondary);
  margin-bottom: 2rem;
  line-height: 1.65;
}

.social-links {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.social-link {
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-md);
  padding: 8px 16px;
  font-size: 13px;
  color: var(--text-secondary);
  font-family: var(--mono);
  transition: border-color 0.15s, color 0.15s;
}

.social-link:hover {
  border-color: var(--accent);
  color: var(--accent);
}

/* Form */
.form {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.form input,
.form textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--border-mid);
  border-radius: var(--radius-md);
  background: var(--bg-primary);
  color: var(--text-primary);
  font-size: 14px;
  font-family: var(--sans);
  resize: none;
  transition: border-color 0.15s;
  outline: none;
}

.form input:focus,
.form textarea:focus {
  border-color: var(--accent);
}

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

.form textarea {
  height: 120px;
}

.form-status {
  font-size: 13px;
  color: var(--accent);
  min-height: 18px;
}

/* ===========================
   FOOTER
=========================== */
footer {
  background: var(--bg-primary);
  border-top: 1px solid var(--border-light);
  padding: 1.5rem 0;
}

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

.footer-copy,
.footer-right {
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-tertiary);
}

/* ===========================
   ANIMACIONES SCROLL
=========================== */
.fade-in {
  opacity: 0;
  transform: translateY(16px);
  transition: opacity 0.45s ease, transform 0.45s ease;
}

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

/* ===========================
   RESPONSIVE
=========================== */
@media (max-width: 720px) {
  .about-grid,
  .contact-inner {
    grid-template-columns: 1fr;
  }

  .skills-groups {
    grid-template-columns: 1fr;
  }

  .projects-grid {
    grid-template-columns: 1fr;
  }

  .project-featured {
    grid-column: auto;
  }

  .timeline-item {
    grid-template-columns: 72px 1px 1fr;
    gap: 0 1rem;
  }

  .nav-links {
    display: none;
    flex-direction: column;
    position: absolute;
    top: 56px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-light);
    padding: 1rem 1.5rem;
    gap: 1rem;
    z-index: 99;
  }

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

  .nav-toggle {
    display: block;
  }

  nav {
    position: relative;
  }

  .footer-inner {
    flex-direction: column;
    gap: 6px;
    text-align: center;
  }

  h1 {
    letter-spacing: -1px;
  }
}