/* ============================================================
   DESIGN TOKENS
============================================================ */
:root {
  /* Colour */
  --col-bg: #0d0d0f;
  --col-surface: #141416;
  --col-surface-2: #1a1a1d;
  --col-border: #232328;
  --col-border-soft: #1c1c20;

  --col-text-primary: #ededed;
  --col-text-secondary: #a0a0a0;
  --col-text-muted: #555560;

  --col-accent: #3d8bff;
  /* electric blue */
  --col-accent-dim: rgba(61, 139, 255, 0.12);
  --col-accent-glow: rgba(61, 139, 255, 0.25);

  /* Typography */
  --font-sans: 'Inter', 'Helvetica Neue', Arial, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Fira Code', monospace;

  --fs-xs: 12px;
  --fs-sm: 14px;
  --fs-base: 16px;
  --fs-lg: 18px;
  --fs-xl: 22px;
  --fs-2xl: 28px;
  --fs-3xl: 38px;
  --fs-4xl: 52px;

  --fw-regular: 400;
  --fw-medium: 500;
  --fw-semibold: 600;

  --lh-tight: 1.2;
  --lh-normal: 1.6;
  --lh-loose: 1.8;

  /* Spacing */
  --space-1: 4px;
  --space-2: 8px;
  --space-3: 12px;
  --space-4: 16px;
  --space-5: 24px;
  --space-6: 32px;
  --space-7: 48px;
  --space-8: 64px;
  --space-9: 96px;
  --space-10: 128px;

  /* Layout */
  --max-width: 900px;
  --header-h: 68px;
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 16px;
  --radius-xl: 28px;

  /* Motion */
  --ease: cubic-bezier(0.25, 0.46, 0.45, 0.94);
  --dur-fast: 0.15s;
  --dur-mid: 0.25s;
  --dur-slow: 0.4s;
}

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

html {
  font-size: var(--fs-base);
  scroll-behavior: smooth;
}

body {
  background-color: var(--col-bg);
  color: var(--col-text-primary);
  font-family: var(--font-sans);
  line-height: var(--lh-normal);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

main {
  flex: 1;
}

img {
  display: block;
  max-width: 100%;
}

ul {
  list-style: none;
}

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

/* ============================================================
   TYPOGRAPHY SCALE
============================================================ */
h1 {
  font-size: var(--fs-4xl);
  font-weight: var(--fw-semibold);
  line-height: 1.12;
  letter-spacing: -1.5px;
  color: var(--col-text-primary);
  text-align: left;
}

h2 {
  font-size: var(--fs-3xl);
  font-weight: var(--fw-semibold);
  line-height: 1.18;
  letter-spacing: -0.8px;
  color: var(--col-text-primary);
  text-align: left;
}

h3 {
  font-size: var(--fs-xl);
  font-weight: var(--fw-semibold);
  line-height: 1.25;
  letter-spacing: -0.2px;
  color: var(--col-text-primary);
  text-align: left;
}

h4 {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--col-text-muted);
  text-align: left;
}

p {
  font-size: var(--fs-base);
  color: var(--col-text-secondary);
  line-height: 1.65;
  max-width: 60ch;
  text-align: left;
}

strong {
  color: var(--col-text-primary);
  font-weight: var(--fw-medium);
}

/* ============================================================
   LAYOUT
============================================================ */
.container {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-6);
}

.page-wrapper {
  padding-top: calc(var(--header-h) + var(--space-9));
  padding-bottom: var(--space-10);
}

/* ============================================================
   HEADER
============================================================ */
.site-header {
  position: fixed;
  inset: 0 0 auto 0;
  height: var(--header-h);
  z-index: 200;
  transition: background-color var(--dur-mid) var(--ease),
    border-color var(--dur-mid) var(--ease);
  border-bottom: 1px solid transparent;
}

.site-header.is-scrolled {
  background-color: rgba(13, 13, 15, 0.92);
  border-bottom-color: var(--col-border);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
}

.header-inner {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-6);
  height: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.site-logo {
  font-size: var(--fs-sm);
  font-weight: var(--fw-medium);
  color: var(--col-text-primary);
  letter-spacing: 0.01em;
  transition: opacity var(--dur-fast) var(--ease);
}

.site-logo:hover {
  opacity: 0.65;
}

.site-nav {
  display: flex;
  align-items: center;
  gap: var(--space-7);
}

.nav-link {
  font-size: var(--fs-sm);
  color: var(--col-text-secondary);
  letter-spacing: 0.01em;
  position: relative;
  transition: color var(--dur-fast) var(--ease);
  padding-bottom: 2px;
}

.nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--col-accent);
  transform: scaleX(0);
  transition: transform var(--dur-mid) var(--ease);
  transform-origin: left;
}

.nav-link:hover {
  color: var(--col-text-primary);
}

.nav-link:hover::after {
  transform: scaleX(1);
}

.nav-link.is-active {
  color: var(--col-text-primary);
}

.nav-link.is-active::after {
  transform: scaleX(1);
}

/* ============================================================
   FOOTER
============================================================ */
.site-footer {
  border-top: 1px solid var(--col-border);
  padding: var(--space-6) 0;
}

.footer-inner {
  max-width: var(--max-width);
  margin-inline: auto;
  padding-inline: var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.footer-name {
  font-size: var(--fs-xs);
  color: var(--col-text-muted);
  letter-spacing: 0.03em;
}

.footer-year {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--col-text-muted);
}

/* ============================================================
   DIVIDER
============================================================ */
.divider {
  border: none;
  border-top: 1px solid var(--col-border-soft);
  margin: var(--space-5) 0;
  opacity: 0.6;
}

.divider--accent {
  border-top-color: var(--col-accent);
  opacity: 0.2;
}

/* ============================================================
   PAGE: SOBRE MÍ — HERO
============================================================ */
.hero {
  display: grid;
  grid-template-columns: 165px 1fr;
  gap: var(--space-7);
  align-items: start;
}

/* Profile image */
.profile-wrap {
  position: sticky;
  top: calc(var(--header-h) + var(--space-6));
  padding-top: 6px;
}

.profile-img {
  width: 100%;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  object-position: center top;
  border-radius: var(--radius-xl);
  border: 1px solid rgba(61, 139, 255, 0.15);
  box-shadow: 0 4px 28px rgba(0, 0, 0, 0.55),
    0 0 0 1px var(--col-border),
    0 0 18px rgba(61, 139, 255, 0.08);
  transition: box-shadow var(--dur-slow) var(--ease),
    border-color var(--dur-slow) var(--ease);
}

.profile-img:hover {
  border-color: rgba(61, 139, 255, 0.32);
  box-shadow: 0 6px 36px rgba(0, 0, 0, 0.65),
    0 0 0 1px rgba(61, 139, 255, 0.2),
    0 0 24px rgba(61, 139, 255, 0.14);
}

/* Hero content */
.hero-content {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.hero-content h1 {
  font-size: var(--fs-3xl);
  line-height: 1.15;
  letter-spacing: -1px;
  margin-bottom: var(--space-3);
}

.hero-lead {
  font-size: var(--fs-base);
  color: var(--col-text-secondary);
  max-width: 54ch;
  line-height: 1.65;
  margin-bottom: var(--space-5);
}

/* Section block inside hero */
.bio-block {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-bottom: var(--space-4);
}

.bio-block:last-of-type {
  margin-bottom: 0;
}

.bio-block h3 {
  font-size: 10px;
  font-weight: var(--fw-semibold);
  letter-spacing: 0.13em;
  text-transform: uppercase;
  color: var(--col-accent);
  opacity: 0.9;
  margin-bottom: var(--space-1);
  padding-left: 10px;
  position: relative;
}

.bio-block h3::before {
  content: '';
  position: absolute;
  left: 0;
  top: 1px;
  bottom: 1px;
  width: 2px;
  background: var(--col-accent);
  opacity: 0.45;
  border-radius: 2px;
}

.bio-block p {
  font-size: var(--fs-base);
  color: var(--col-text-secondary);
  line-height: 1.65;
  max-width: 58ch;
}

/* Skills */
.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 5px;
  margin-top: var(--space-2);
}

.skill-pill {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--col-text-secondary);
  background: var(--col-surface-2);
  border: 1px solid var(--col-border);
  border-radius: 3px;
  padding: 4px 10px;
  line-height: 1;
  letter-spacing: 0.01em;
  transition: color var(--dur-fast) var(--ease),
    border-color var(--dur-mid) var(--ease),
    background var(--dur-mid) var(--ease);
}

.skill-pill:hover {
  color: var(--col-accent);
  border-color: rgba(61, 139, 255, 0.35);
  background: rgba(61, 139, 255, 0.07);
}

/* Closing note */
.bio-closing {
  margin-top: var(--space-4);
  padding: 14px var(--space-4);
  border-left: 1px solid rgba(61, 139, 255, 0.25);
  background: transparent;
}

.bio-closing p {
  font-size: var(--fs-sm);
  font-style: italic;
  color: var(--col-text-muted);
  line-height: 1.65;
  max-width: 58ch;
}

/* ============================================================
   PAGE: PROYECTOS
============================================================ */
.projects-header {
  margin-bottom: var(--space-9);
}

.projects-header h1 {
  margin-bottom: var(--space-3);
}

.projects-header p {
  font-size: var(--fs-lg);
  max-width: 52ch;
}

/* Project card */
.project-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
}

.project-card {
  padding: var(--space-6) var(--space-6);
  background: var(--col-surface);
  border: 1px solid var(--col-border);
  border-radius: var(--radius-lg);
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-7);
  align-items: start;
  transition:
    border-color var(--dur-mid) var(--ease),
    box-shadow var(--dur-mid) var(--ease),
    transform var(--dur-mid) var(--ease);
}

.project-card:hover {
  border-color: rgba(61, 139, 255, 0.28);
  box-shadow: 0 8px 32px rgba(0, 0, 0, 0.5), 0 0 0 1px rgba(61, 139, 255, 0.08);
  transform: translateY(-2px);
}

.project-card-left {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.project-index {
  font-family: var(--font-mono);
  font-size: var(--fs-xs);
  color: var(--col-accent);
  letter-spacing: 0.08em;
  opacity: 0.75;
}

.project-card h2 {
  font-size: var(--fs-2xl);
  font-weight: var(--fw-semibold);
  letter-spacing: -0.5px;
  line-height: 1.18;
  color: var(--col-text-primary);
  transition: color var(--dur-fast) var(--ease);
}

.project-card:hover h2 {
  color: var(--col-accent);
}

.project-card>.project-card-left>p {
  font-size: var(--fs-base);
  color: var(--col-text-secondary);
  line-height: var(--lh-loose);
  max-width: 100%;
}

/* Impact line */
.project-impact {
  display: inline-block;
  font-size: var(--fs-sm);
  font-style: italic;
  color: var(--col-accent);
  opacity: 0.85;
  padding-left: 12px;
  border-left: 2px solid rgba(61, 139, 255, 0.35);
  line-height: 1.5;
  max-width: 100%;
  transition: opacity var(--dur-fast) var(--ease), border-color var(--dur-fast) var(--ease);
}

.project-card:hover .project-impact {
  opacity: 1;
  border-color: var(--col-accent);
}

.project-card-right {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  padding-top: var(--space-2);
}

/* Bullet list */
.project-bullets {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.project-bullets li {
  font-size: var(--fs-sm);
  color: var(--col-text-secondary);
  padding-left: var(--space-4);
  position: relative;
  line-height: var(--lh-loose);
}

.project-bullets li::before {
  content: '';
  position: absolute;
  left: 0;
  top: 10px;
  width: 5px;
  height: 1px;
  background: var(--col-accent);
  opacity: 0.6;
}

/* Tech tags */
.tech-block {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}

.tech-label {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--col-text-muted);
}

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

.tech-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--col-text-secondary);
  background: var(--col-surface);
  border: 1px solid var(--col-border);
  border-radius: var(--radius-sm);
  padding: 3px 9px;
  line-height: 1.5;
  letter-spacing: 0.02em;
}

/* Work philosophy */
.work-philosophy {
  margin-top: var(--space-9);
  padding: var(--space-7) var(--space-7);
  background: var(--col-surface);
  border: 1px solid var(--col-border);
  border-radius: var(--radius-lg);
  border-left: 3px solid var(--col-accent);
}

.work-philosophy h3 {
  font-size: var(--fs-xs);
  font-weight: var(--fw-medium);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--col-accent);
  margin-bottom: var(--space-3);
}

.work-philosophy p {
  font-size: var(--fs-base);
  font-style: italic;
  color: var(--col-text-secondary);
  max-width: 60ch;
  line-height: var(--lh-loose);
}

/* ============================================================
   PAGE: CONTACTO
============================================================ */
.contact-page {
  display: flex;
  flex-direction: column;
  justify-content: center;
  min-height: calc(100vh - var(--header-h) - 100px);
  padding-top: 0;
}

.contact-page .page-wrapper {
  padding-top: 0;
  padding-bottom: 0;
}

.contact-header {
  margin-bottom: var(--space-7);
}

/* Título de contacto — más compacto que el H1 global */
.contact-title {
  font-size: var(--fs-2xl);
  font-weight: var(--fw-semibold);
  line-height: 1.1;
  letter-spacing: -0.8px;
  color: var(--col-text-primary);
  margin-bottom: var(--space-3);
}

.contact-header p {
  font-size: var(--fs-base);
  color: var(--col-text-secondary);
  max-width: 44ch;
  line-height: 1.6;
}

/* Contact list */
.contact-list {
  display: flex;
  flex-direction: column;
}

.contact-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-5) var(--space-3);
  margin-inline: calc(-1 * var(--space-3));
  border-bottom: 1px solid var(--col-border);
  gap: var(--space-5);
  border-radius: var(--radius-sm);
  transition:
    background-color 0.2s var(--ease),
    border-color 0.2s var(--ease);
}

.contact-item:first-child {
  border-top: 1px solid var(--col-border);
}

.contact-item:hover {
  background-color: rgba(255, 255, 255, 0.025);
  border-bottom-color: rgba(61, 139, 255, 0.18);
}

.contact-item-left {
  display: flex;
  flex-direction: column;
  gap: 5px;
}

.contact-type {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--col-text-muted);
  transition: color 0.2s var(--ease);
}

.contact-value {
  font-size: var(--fs-base);
  color: var(--col-text-primary);
  font-weight: var(--fw-medium);
  letter-spacing: -0.1px;
  transition: color 0.2s var(--ease);
}

.contact-arrow {
  font-size: var(--fs-base);
  color: var(--col-text-muted);
  opacity: 0.45;
  flex-shrink: 0;
  transition:
    color 0.2s var(--ease),
    opacity 0.2s var(--ease),
    transform 0.25s var(--ease);
}

.contact-item:hover .contact-type {
  color: var(--col-accent);
  opacity: 0.85;
}

.contact-item:hover .contact-value {
  color: var(--col-text-primary);
}

.contact-item:hover .contact-arrow {
  color: var(--col-accent);
  opacity: 1;
  transform: translateX(4px);
}

/* ============================================================
   FOCUS STYLES (ACCESSIBILITY)
============================================================ */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--col-accent);
  outline-offset: 3px;
  border-radius: 2px;
}

/* ============================================================
   RESPONSIVE
============================================================ */
@media (max-width: 768px) {
  :root {
    --fs-4xl: 34px;
    --fs-3xl: 26px;
    --fs-2xl: 22px;
    --fs-xl: 19px;
  }

  .container {
    padding-inline: var(--space-5);
  }

  .header-inner {
    padding-inline: var(--space-5);
  }

  .site-logo {
    font-size: 12px;
    max-width: 160px;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
  }

  .site-nav {
    gap: var(--space-5);
  }

  /* Hero: stacked */
  .hero {
    grid-template-columns: 1fr;
    gap: var(--space-7);
  }

  .profile-wrap {
    position: static;
    max-width: 160px;
  }

  /* Projects: single column */
  .project-card {
    grid-template-columns: 1fr;
    gap: var(--space-5);
    padding: var(--space-5);
  }


  .page-wrapper {
    padding-top: calc(var(--header-h) + var(--space-7));
    padding-bottom: var(--space-9);
  }

  .footer-inner {
    padding-inline: var(--space-5);
  }

  .contact-value {
    font-size: var(--fs-base);
  }
}

@media (max-width: 480px) {
  .site-logo {
    max-width: 120px;
    font-size: 11px;
  }

  .site-nav {
    gap: var(--space-4);
  }
}