/* ==========================================================================
   Eili Sierra — Portfolio
   Paleta "Latín Moderno": rosa rojo (#E11D48) + gris grafito (#18181B)
   Tipografías: Instrument Serif (italics) + Inter (sans principal)
   ========================================================================== */

:root {
  --color-bg: #FAFAFA;
  --color-bg-alt: #F4F4F5;
  --color-surface: #FFFFFF;
  --color-text: #18181B;
  --color-text-soft: #52525B;
  --color-muted: #A1A1AA;
  --color-border: #E4E4E7;

  --color-accent: #E11D48;
  --color-accent-hover: #BE123C;
  --color-accent-soft: #FCA5A5;
  --color-secondary: #0284C7;

  --font-display: 'Instrument Serif', Georgia, serif;
  --font-body: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

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

  --shadow-sm: 0 1px 2px rgba(24,24,27,0.04);
  --shadow-md: 0 10px 30px rgba(24,24,27,0.08);
  --shadow-lg: 0 20px 40px rgba(24,24,27,0.12);

  --max-width: 1120px;
  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 40px;
  --space-5: 64px;
  --space-6: 96px;
}

*, *::before, *::after { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
img { max-width: 100%; display: block; }
a { color: inherit; }
ul { list-style: none; margin: 0; padding: 0; }
button { font: inherit; cursor: pointer; }

body {
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.6;
  font-size: 17px;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
}

.container {
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

/* =============== Header =============== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(250, 250, 250, 0.9);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-2) var(--space-3);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  color: var(--color-text);
  font-weight: 600;
}

.brand-mark {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 34px;
  height: 34px;
  background: var(--color-text);
  color: var(--color-bg);
  border-radius: 50%;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 15px;
}

.brand-name { font-size: 17px; letter-spacing: -0.01em; }

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-3);
}
.nav a {
  text-decoration: none;
  color: var(--color-text-soft);
  font-weight: 500;
  font-size: 15px;
  transition: color .2s ease;
}
.nav a:hover { color: var(--color-accent); }
.nav-cta {
  padding: 8px 16px;
  background: var(--color-text);
  color: var(--color-bg) !important;
  border-radius: 999px;
}
.nav-cta:hover { background: var(--color-accent); color: #fff !important; }

/* =============== Hero =============== */
.hero {
  padding: var(--space-6) 0 var(--space-5);
  position: relative;
  overflow: hidden;
}
.hero::before {
  content: '';
  position: absolute;
  top: 10%;
  right: 5%;
  width: 280px;
  height: 280px;
  background: var(--color-accent);
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.14;
  z-index: 0;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: 5%;
  left: -5%;
  width: 240px;
  height: 240px;
  background: var(--color-secondary);
  border-radius: 50%;
  filter: blur(120px);
  opacity: 0.10;
  z-index: 0;
}
.hero-inner { max-width: 820px; position: relative; z-index: 1; }
.hero-eyebrow {
  text-transform: uppercase;
  letter-spacing: 2.5px;
  font-size: 12px;
  color: var(--color-accent);
  font-weight: 600;
  margin: 0 0 var(--space-2);
}
.hero-title {
  font-family: var(--font-body);
  font-size: clamp(2.4rem, 5.5vw, 4.5rem);
  line-height: 1.05;
  font-weight: 500;
  margin: 0 0 var(--space-3);
  color: var(--color-text);
  letter-spacing: -0.03em;
}
.hero-title em {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--color-accent);
  font-weight: 400;
  letter-spacing: -0.02em;
}
.hero-lead {
  font-size: 1.15rem;
  color: var(--color-text-soft);
  max-width: 620px;
  margin: 0 0 var(--space-4);
}
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
}

/* =============== Buttons =============== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 14px 26px;
  border-radius: 999px;
  text-decoration: none;
  font-weight: 600;
  font-size: 15px;
  transition: transform .15s ease, background .2s ease, color .2s ease, box-shadow .2s ease, border-color .2s ease;
  border: 1.5px solid transparent;
}
.btn-primary {
  background: var(--color-text);
  color: #fff;
}
.btn-primary:hover {
  background: var(--color-accent);
  transform: translateY(-1px);
}
.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border-color: var(--color-border);
}
.btn-ghost:hover {
  border-color: var(--color-text);
  background: var(--color-surface);
}

/* =============== Sections =============== */
.section {
  padding: var(--space-6) 0;
}
.section-alt { background: var(--color-bg-alt); }
.section-eyebrow {
  text-transform: uppercase;
  letter-spacing: 2.5px;
  font-size: 12px;
  color: var(--color-accent);
  font-weight: 600;
  margin: 0 0 var(--space-2);
}
.section-title {
  font-family: var(--font-body);
  font-size: clamp(1.8rem, 3.5vw, 2.6rem);
  font-weight: 500;
  margin: 0 0 var(--space-3);
  color: var(--color-text);
  letter-spacing: -0.02em;
}
.section-title em {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--color-accent);
  font-weight: 400;
}
.section-lead {
  font-size: 1.05rem;
  color: var(--color-text-soft);
  max-width: 620px;
  margin: 0 0 var(--space-4);
}

.two-col {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: var(--space-5);
  align-items: start;
}
.col > p { color: var(--color-text-soft); margin: 0 0 var(--space-2); }
.col .muted { color: var(--color-muted); font-family: var(--font-display); font-style: italic; font-size: 1.05rem; }

/* profile card */
.profile-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  box-shadow: var(--shadow-md);
}
.profile-photo {
  width: 100%;
  aspect-ratio: 4 / 5;
  background: linear-gradient(135deg, #F4F4F5 0%, #E4E4E7 100%);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-soft);
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.3rem;
  margin-bottom: var(--space-3);
  position: relative;
  overflow: hidden;
}
.profile-photo::after {
  content: '';
  position: absolute;
  top: -20%;
  right: -20%;
  width: 60%;
  height: 60%;
  background: var(--color-accent);
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.15;
}
.profile-meta { margin: 0; display: grid; gap: 8px; }
.profile-meta dt {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-muted);
  margin-top: 8px;
  font-weight: 600;
}
.profile-meta dd { margin: 0; font-size: 15px; color: var(--color-text); }

/* =============== Tools grid =============== */
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
  gap: var(--space-2);
  margin-top: var(--space-3);
}
.tool-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.tool-card:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-text);
}
.tool-card h3 {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.4rem;
  font-weight: 400;
  margin: 8px 0 6px;
  color: var(--color-text);
  letter-spacing: -0.01em;
}
.tool-card p {
  color: var(--color-text-soft);
  font-size: 14px;
  margin: 0;
}
.tool-tag {
  display: inline-block;
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-accent);
  font-weight: 600;
}
.tool-card-accent {
  background: var(--color-text);
  color: #fff;
  border-color: var(--color-text);
}
.tool-card-accent h3 { color: #fff; }
.tool-card-accent p { color: rgba(255,255,255,0.7); }
.tool-card-accent .tool-tag { color: var(--color-accent-soft); }

/* =============== Samples grid =============== */
.samples-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-3);
}
.sample-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform .2s ease, box-shadow .2s ease;
}
.sample-card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-md);
}
.sample-thumb {
  aspect-ratio: 16 / 10;
  background: linear-gradient(135deg, #18181B 0%, #3F3F46 100%);
  color: rgba(255,255,255,0.4);
  font-family: var(--font-display);
  font-style: italic;
  font-size: 4rem;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
}
.sample-thumb::after {
  content: '';
  position: absolute;
  top: -30%;
  right: -20%;
  width: 60%;
  height: 100%;
  background: var(--color-accent);
  border-radius: 50%;
  filter: blur(80px);
  opacity: 0.25;
}
.sample-body { padding: var(--space-3); }
.sample-body h3 {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.35rem;
  font-weight: 400;
  margin: 6px 0;
  letter-spacing: -0.01em;
}
.sample-body p { color: var(--color-text-soft); margin: 0 0 12px; font-size: 14px; }
.sample-tag {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-accent);
  font-weight: 600;
}
.sample-status {
  display: inline-block;
  font-size: 12px;
  padding: 4px 12px;
  border-radius: 999px;
  background: var(--color-bg-alt);
  color: var(--color-text-soft);
  border: 1px solid var(--color-border);
}
.sample-placeholder .sample-thumb { opacity: 0.7; }

/* Sample card LIVE (real working sample) */
.sample-card-live {
  border-color: var(--color-text);
  background: var(--color-surface);
  position: relative;
}
.sample-card-live::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0; bottom: 0;
  border-radius: var(--radius-md);
  background: linear-gradient(135deg, rgba(225,29,72,0.04), rgba(2,132,199,0.04));
  pointer-events: none;
  z-index: 0;
}
.sample-link {
  display: block;
  text-decoration: none;
  color: inherit;
  position: relative;
  z-index: 1;
}
.sample-thumb-live {
  background: linear-gradient(135deg, #18181B 0%, #27272A 100%);
  position: relative;
  display: flex;
  align-items: center;
  justify-content: center;
}
.sample-thumb-live::before {
  content: '';
  position: absolute;
  inset: 0;
  background:
    linear-gradient(90deg, transparent 49%, rgba(255,255,255,0.04) 50%, transparent 51%) 0 0 / 40px 100%,
    linear-gradient(0deg, transparent 49%, rgba(255,255,255,0.04) 50%, transparent 51%) 0 0 / 100% 40px;
}
.sample-thumb-live::after {
  content: '';
  position: absolute;
  bottom: 30%;
  left: 10%;
  right: 10%;
  height: 2.5px;
  background: var(--color-accent);
  border-radius: 2px;
  box-shadow: 0 0 24px rgba(225,29,72,0.6);
  transform-origin: left center;
  animation: drawCurve 3s ease-out infinite;
  clip-path: polygon(0 50%, 5% 50%, 10% 45%, 15% 35%, 25% 20%, 35% 10%, 50% 5%, 65% 15%, 80% 35%, 90% 60%, 100% 90%);
}
@keyframes drawCurve {
  0% { transform: scaleX(0); opacity: 0.2; }
  60% { transform: scaleX(1); opacity: 1; }
  100% { transform: scaleX(1); opacity: 0.6; }
}
.sample-curve {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 2.4rem;
  color: rgba(255,255,255,0.85);
  letter-spacing: -0.02em;
  position: relative;
  z-index: 2;
  text-shadow: 0 2px 16px rgba(225,29,72,0.4);
}
.sample-number {
  position: absolute;
  top: 14px;
  left: 18px;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1rem;
  color: rgba(255,255,255,0.5);
  z-index: 2;
}
.sample-status-live {
  background: var(--color-text);
  color: #fff;
  border-color: var(--color-text);
  font-weight: 600;
  font-family: var(--font-body);
}
.sample-card-live:hover {
  transform: translateY(-6px);
  box-shadow: var(--shadow-lg);
}
.sample-card-live:hover .sample-status-live {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

/* =============== Services =============== */
.services-list {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-2);
  margin-top: var(--space-3);
}
.services-list li {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  transition: border-color .2s ease, transform .2s ease;
}
.services-list li:hover {
  border-color: var(--color-text);
  transform: translateY(-2px);
}
.services-list h3 {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.3rem;
  font-weight: 400;
  margin: 0 0 6px;
  letter-spacing: -0.01em;
}
.services-list p { color: var(--color-text-soft); margin: 0; font-size: 14px; }

/* =============== Contact =============== */
.section-contact {
  background: var(--color-text);
  color: #fff;
  position: relative;
  overflow: hidden;
}
.section-contact::before {
  content: '';
  position: absolute;
  top: -20%;
  right: -10%;
  width: 400px;
  height: 400px;
  background: var(--color-accent);
  border-radius: 50%;
  filter: blur(140px);
  opacity: 0.25;
}
.section-contact .container { position: relative; z-index: 1; }
.section-contact .section-eyebrow { color: var(--color-accent-soft); }
.section-contact .section-title { color: #fff; }
.section-contact .section-title em { color: var(--color-accent-soft); }
.section-contact .section-lead { color: rgba(255,255,255,0.75); }
.contact-inner { text-align: center; max-width: 680px; margin: 0 auto; }
.contact-links {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-top: var(--space-3);
}
.section-contact .btn-primary {
  background: #fff;
  color: var(--color-text);
}
.section-contact .btn-primary:hover {
  background: var(--color-accent);
  color: #fff;
}
.section-contact .btn-ghost {
  color: #fff;
  border-color: rgba(255,255,255,0.3);
}
.section-contact .btn-ghost:hover {
  background: rgba(255,255,255,0.08);
  border-color: #fff;
}

/* =============== Footer =============== */
.site-footer {
  background: var(--color-bg-alt);
  padding: var(--space-3) 0;
  border-top: 1px solid var(--color-border);
}
.footer-inner {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--space-2);
  font-size: 14px;
  color: var(--color-text-soft);
}
.footer-inner .muted { color: var(--color-muted); font-family: var(--font-display); font-style: italic; font-size: 15px; }

/* =============== Stack (Herramientas completas) =============== */
.stack-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-3);
  margin-top: var(--space-4);
}
.stack-col {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  padding: var(--space-3);
  transition: border-color .2s ease, transform .2s ease;
}
.stack-col:hover {
  border-color: var(--color-text);
  transform: translateY(-2px);
}
.stack-title {
  font-family: var(--font-display);
  font-style: italic;
  font-size: 1.35rem;
  font-weight: 400;
  margin: 0 0 var(--space-2);
  color: var(--color-text);
  letter-spacing: -0.01em;
  padding-bottom: var(--space-1);
  border-bottom: 1px solid var(--color-border);
}
.stack-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  margin-top: 12px;
}
.stack-tag {
  display: inline-block;
  font-size: 13px;
  padding: 5px 12px;
  background: var(--color-bg-alt);
  color: var(--color-text-soft);
  border-radius: 999px;
  border: 1px solid transparent;
  font-weight: 500;
  transition: all .15s ease;
}
.stack-tag:hover {
  background: var(--color-bg);
  border-color: var(--color-border);
  color: var(--color-text);
}
.stack-tag-strong {
  background: var(--color-text);
  color: #fff;
}
.stack-tag-strong:hover {
  background: var(--color-accent);
  color: #fff;
  border-color: transparent;
}

.stack-legend {
  margin-top: var(--space-3);
  text-align: center;
  font-size: 13px;
  color: var(--color-muted);
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-3);
}
.stack-dot {
  display: inline-block;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-bg-alt);
  border: 1px solid var(--color-border);
  margin-right: 4px;
  vertical-align: middle;
}
.stack-dot-strong {
  background: var(--color-text);
  border-color: var(--color-text);
}

/* =============== Pillars (Metodología) =============== */
.pillars-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-3);
  margin-top: var(--space-4);
}
.pillar {
  display: grid;
  grid-template-columns: 280px 1fr;
  gap: var(--space-4);
  align-items: center;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: var(--space-3);
  transition: transform .2s ease, box-shadow .2s ease, border-color .2s ease;
}
.pillar:hover {
  transform: translateY(-3px);
  box-shadow: var(--shadow-md);
  border-color: var(--color-text);
}
.pillar:nth-child(even) {
  grid-template-columns: 1fr 280px;
}
.pillar:nth-child(even) .pillar-visual { order: 2; }
.pillar:nth-child(even) .pillar-body { order: 1; }

.pillar-visual {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius-md);
  overflow: hidden;
  background: linear-gradient(135deg, #18181B 0%, #3F3F46 100%);
}
.pillar-visual img {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
}
.pillar-visual::after {
  content: '';
  position: absolute;
  top: -30%;
  right: -30%;
  width: 80%;
  height: 80%;
  background: var(--color-accent);
  border-radius: 50%;
  filter: blur(60px);
  opacity: 0.35;
  pointer-events: none;
}
.pillar-number {
  position: absolute;
  bottom: 16px;
  left: 20px;
  font-family: var(--font-display);
  font-style: italic;
  font-size: 3rem;
  color: rgba(255,255,255,0.95);
  font-weight: 400;
  line-height: 1;
  z-index: 2;
  letter-spacing: -0.02em;
  text-shadow: 0 2px 12px rgba(0,0,0,0.3);
}

.pillar-body { max-width: 560px; }
.pillar-tag {
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 1.5px;
  color: var(--color-accent);
  font-weight: 600;
  margin: 0 0 8px;
}
.pillar-body h3 {
  font-family: var(--font-body);
  font-size: clamp(1.4rem, 2.5vw, 1.8rem);
  font-weight: 500;
  margin: 0 0 12px;
  letter-spacing: -0.02em;
  color: var(--color-text);
}
.pillar-body p {
  font-size: 1rem;
  color: var(--color-text-soft);
  margin: 0;
  line-height: 1.65;
}
.pillar-body p strong {
  color: var(--color-text);
  font-weight: 600;
}

.pillars-footnote {
  margin-top: var(--space-4);
  font-size: 14px;
  color: var(--color-muted);
  text-align: center;
  max-width: 700px;
  margin-left: auto;
  margin-right: auto;
}
.pillars-footnote em {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--color-text-soft);
  font-size: 1.05em;
}

@media (max-width: 780px) {
  .pillar,
  .pillar:nth-child(even) {
    grid-template-columns: 1fr;
    gap: var(--space-2);
  }
  .pillar:nth-child(even) .pillar-visual { order: 0; }
  .pillar:nth-child(even) .pillar-body { order: 0; }
  .pillar-visual { aspect-ratio: 16/10; max-width: 100%; }
  .pillar-number { font-size: 2.4rem; }
}

/* =============== Responsive =============== */
@media (max-width: 820px) {
  .nav { gap: var(--space-2); }
  .nav a:not(.nav-cta) { display: none; }
  .nav-cta { padding: 6px 12px; font-size: 14px; }
  .two-col { grid-template-columns: 1fr; }
  .hero { padding: var(--space-5) 0 var(--space-4); }
  .section { padding: var(--space-5) 0; }
}