/* ==========================================================================
   Kelvim Gutiérrez — Software Engineer Portfolio Stylesheet
   Modern, Clean & Editorial Developer Theme
   ========================================================================== */

/* --- Fonts & CSS Variables --- */
@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;500;600&family=Newsreader:ital,opsz,wght@1,6..72,400;1,6..72,500&family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

:root {
  /* Color Palette */
  --ink: #142725;
  --ink-light: #1f3634;
  --ink-soft: #2e4442;
  --muted: #5e6b66;
  --muted-light: #7a8781;
  --paper: #f5f4ee;
  --paper-elevated: #faf9f4;
  --paper-card: #f9f8f3;
  --line: #d8ded4;
  --line-strong: #bac3b6;
  --green: #1d5543;
  --green-hover: #154234;
  --green-light: #eaf1ed;
  --lime: #d9ed9a;
  --lime-hover: #c4dc80;
  --lime-soft: #ebf6cd;
  
  /* Terminal Specifics */
  --term-bg: #142523;
  --term-text: #c2d5c8;
  --term-dim: #7d968b;
  --term-border: rgba(255, 255, 255, 0.08);

  /* Typography */
  --font-sans: 'Plus Jakarta Sans', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-serif: 'Newsreader', Georgia, Cambria, serif;
  --font-mono: 'JetBrains Mono', ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, monospace;

  /* Layout */
  --max-width: 1180px;
  --header-height: 80px;
  --radius-sm: 6px;
  --radius-md: 10px;
  --radius-lg: 16px;
  --radius-full: 9999px;

  /* Shadows & Transitions */
  --shadow-sm: 0 1px 2px rgba(20, 39, 37, 0.05);
  --shadow-terminal: 14px 16px 0px #e4e7db, 14px 16px 25px rgba(20, 39, 37, 0.08);
  --transition-fast: 180ms ease;
  --transition-base: 260ms cubic-bezier(0.16, 1, 0.3, 1);
}

/* --- Base & Reset --- */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 20px);
}

body {
  margin: 0;
  background-color: var(--paper);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}

::selection {
  background-color: var(--lime);
  color: var(--ink);
}

a {
  color: inherit;
  text-decoration: none;
  text-underline-offset: 4px;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

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

/* --- Utility Layout --- */
.wrap {
  width: 100%;
  max-width: var(--max-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: clamp(20px, 4vw, 44px);
  padding-right: clamp(20px, 4vw, 44px);
}

/* --- Accessibility Focus --- */
a:focus-visible,
button:focus-visible,
summary:focus-visible {
  outline: 2px solid var(--green);
  outline-offset: 4px;
  border-radius: 4px;
}

/* --- Header & Navigation --- */
header {
  position: sticky;
  top: 0;
  background: rgba(245, 244, 238, 0.88);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid var(--line);
  z-index: 100;
  transition: background var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

header.scrolled {
  background: rgba(245, 244, 238, 0.95);
  box-shadow: 0 4px 20px rgba(20, 39, 37, 0.04);
}

nav {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 20px;
}

.brand {
  display: inline-flex;
  align-items: center;
  font-weight: 800;
  letter-spacing: -0.04em;
  font-size: 24px;
  color: var(--ink);
}

.brand span {
  color: var(--green);
  transition: transform var(--transition-fast);
  display: inline-block;
}

.brand:hover span {
  transform: scale(1.3) translateY(-1px);
}

.links {
  display: flex;
  align-items: center;
  gap: 28px;
  font-size: 14px;
  font-weight: 500;
}

.links a {
  position: relative;
  color: var(--muted);
  transition: color var(--transition-fast);
}

.links a:hover,
.links a.active {
  color: var(--ink);
}

.links a::after {
  content: "";
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--green);
  transition: width var(--transition-fast);
  border-radius: 2px;
}

.links a:hover::after,
.links a.active::after {
  width: 100%;
}

.pill-link {
  border: 1px solid var(--ink);
  border-radius: var(--radius-full);
  padding: 8px 18px;
  color: var(--ink) !important;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: background-color var(--transition-fast), color var(--transition-fast), transform var(--transition-fast) !important;
}

.pill-link::after {
  display: none !important;
}

.pill-link:hover {
  background-color: var(--ink);
  color: var(--paper) !important;
  transform: translateY(-1px);
}

/* Mobile Nav Toggle */
.menu-toggle {
  display: none;
  background: transparent;
  border: none;
  cursor: pointer;
  padding: 8px;
  color: var(--ink);
}

/* --- Hero Section --- */
.hero {
  display: grid;
  grid-template-columns: 1.55fr 1fr;
  gap: 56px;
  padding: 90px 0 84px;
  align-items: center;
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  font-family: var(--font-mono);
  font-size: 11.5px;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--green);
  margin: 0 0 20px;
}

.eyebrow::before {
  content: "";
  display: inline-block;
  width: 8px;
  height: 8px;
  background: var(--green);
  border-radius: 50%;
  margin-right: 10px;
  box-shadow: 0 0 0 3px rgba(29, 85, 67, 0.18);
  animation: pulseDot 2.8s infinite ease-in-out;
}

@keyframes pulseDot {
  0%, 100% { transform: scale(1); opacity: 1; }
  50% { transform: scale(1.2); opacity: 0.75; }
}

h1 {
  font-size: clamp(40px, 5.2vw, 70px);
  line-height: 1.05;
  letter-spacing: -0.06em;
  font-weight: 700;
  margin: 0 0 24px;
  color: var(--ink);
}

h1 em {
  font-family: var(--font-serif);
  font-weight: 400;
  font-style: italic;
  color: var(--green);
}

.intro {
  max-width: 560px;
  color: var(--muted);
  font-size: 18px;
  line-height: 1.68;
  margin: 0;
}

.actions {
  display: flex;
  gap: 14px;
  flex-wrap: wrap;
  margin-top: 32px;
}

.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-sm);
  background: var(--ink);
  color: #ffffff;
  padding: 13px 22px;
  font-size: 14px;
  font-weight: 600;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid transparent;
  transition: transform var(--transition-fast), background-color var(--transition-fast), color var(--transition-fast), box-shadow var(--transition-fast);
  box-shadow: var(--shadow-sm);
}

.button:hover {
  background: var(--green);
  color: #ffffff;
  transform: translateY(-2px);
  box-shadow: 0 6px 16px rgba(29, 85, 67, 0.2);
}

.button:active {
  transform: translateY(0);
}

.button.secondary {
  background: transparent;
  color: var(--ink);
  border: 1px solid var(--line-strong);
  box-shadow: none;
}

.button.secondary:hover {
  background: var(--ink);
  color: #ffffff;
  border-color: var(--ink);
  box-shadow: 0 6px 16px rgba(20, 39, 37, 0.15);
}

/* --- Terminal Box --- */
.terminal {
  background: var(--term-bg);
  color: var(--term-text);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-terminal);
  transform: rotate(1deg);
  font-family: var(--font-mono);
  font-size: 12px;
  line-height: 1.8;
  border: 1px solid var(--term-border);
  transition: transform var(--transition-base), box-shadow var(--transition-base);
  overflow: hidden;
}

.terminal:hover {
  transform: rotate(0deg) translateY(-4px);
  box-shadow: 18px 22px 0px #dedfd0, 0 20px 35px rgba(20, 39, 37, 0.12);
}

.terminal-top {
  padding: 14px 20px;
  background: rgba(0, 0, 0, 0.15);
  border-bottom: 1px solid var(--term-border);
  display: flex;
  align-items: center;
  gap: 8px;
}

.terminal-top .dots-group {
  display: flex;
  gap: 6px;
  align-items: center;
}

.dot {
  width: 9px;
  height: 9px;
  border-radius: 50%;
  background: #50655d;
  display: inline-block;
  transition: background-color var(--transition-fast);
}

.terminal:hover .dot:nth-child(1) { background: #f87171; }
.terminal:hover .dot:nth-child(2) { background: #fbbf24; }
.terminal:hover .dot:nth-child(3) { background: #4ade80; }

.terminal-title {
  margin-left: auto;
  font-size: 11px;
  color: var(--term-dim);
  letter-spacing: 0.05em;
}

.terminal-body {
  padding: 24px 24px;
}

.terminal .bright {
  color: var(--lime);
  font-weight: 500;
}

.terminal .dim {
  color: var(--term-dim);
}

.stack-row {
  display: grid;
  grid-template-columns: 28px 1fr;
  gap: 12px;
  margin: 16px 0;
  align-items: baseline;
}

.stack-row b {
  font-weight: 600;
  color: var(--lime);
}

.stack-row small {
  display: block;
  color: var(--term-dim);
  font-size: 11px;
  margin-top: 2px;
}

.terminal-footer {
  margin-top: 18px;
  padding-top: 14px;
  border-top: 1px dashed rgba(255, 255, 255, 0.1);
}

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

@keyframes blink {
  0%, 100% { opacity: 1; }
  50% { opacity: 0; }
}

/* --- Disciplines Bar --- */
.disciplines {
  border-top: 1px solid var(--line);
  border-bottom: 1px solid var(--line);
  display: flex;
  flex-wrap: wrap;
  justify-content: space-between;
  gap: 20px;
  padding: 20px 0;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.12em;
  color: var(--muted);
  font-weight: 500;
}

.disciplines span {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: color var(--transition-fast);
}

.disciplines span::before {
  content: "/";
  color: var(--line-strong);
}

.disciplines span:hover {
  color: var(--ink);
}

/* --- Sections Common --- */
section {
  padding: 88px 0;
  border-bottom: 1px solid var(--line);
}

.section-head {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 44px;
  margin-bottom: 48px;
  align-items: flex-end;
}

h2 {
  font-size: clamp(32px, 3.8vw, 42px);
  font-weight: 700;
  line-height: 1.15;
  letter-spacing: -0.04em;
  margin: 0;
  color: var(--ink);
}

.section-head p {
  color: var(--muted);
  max-width: 440px;
  margin: 0;
  font-size: 15px;
  line-height: 1.6;
}

/* --- Projects Section --- */
.project {
  display: grid;
  grid-template-columns: 80px 1.1fr 1.3fr;
  gap: 36px;
  padding: 40px 0;
  border-top: 1px solid var(--line);
  align-items: start;
  transition: background-color var(--transition-fast);
}

.number {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--muted-light);
  padding-top: 4px;
}

.project-meta {
  padding-right: 10px;
}

.tag {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 10.5px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--green);
  text-transform: uppercase;
  background: var(--green-light);
  padding: 4px 10px;
  border-radius: var(--radius-sm);
  margin-bottom: 12px;
}

.project h3 {
  font-size: 26px;
  line-height: 1.22;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin: 0 0 12px;
  color: var(--ink);
}

.project-summary {
  font-size: 15px;
  color: var(--muted);
  margin: 0 0 16px;
}

.tech {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11.5px;
  line-height: 1.7;
  color: var(--green);
  font-weight: 500;
  background: rgba(29, 85, 67, 0.06);
  padding: 4px 10px;
  border-radius: 4px;
}

.project-content p {
  font-size: 15px;
  color: var(--muted);
  margin: 0 0 18px;
  line-height: 1.65;
}

.repo {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-size: 13px;
  font-weight: 600;
  color: var(--ink);
  padding: 6px 0;
  border-bottom: 1px solid var(--ink);
  transition: color var(--transition-fast), border-color var(--transition-fast), transform var(--transition-fast);
}

.repo:hover {
  color: var(--green);
  border-color: var(--green);
  transform: translateX(3px);
}

/* Custom Styled <details> */
.project details {
  font-size: 13.5px;
  color: var(--muted);
  margin-top: 20px;
  background: var(--paper-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  transition: border-color var(--transition-fast), background-color var(--transition-fast);
}

.project details[open] {
  border-color: var(--line-strong);
  background: #ffffff;
}

.project summary {
  cursor: pointer;
  font-weight: 600;
  color: var(--ink);
  user-select: none;
  list-style: none;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.project summary::-webkit-details-marker {
  display: none;
}

.project summary::after {
  content: "+";
  font-family: var(--font-mono);
  font-size: 16px;
  color: var(--green);
  font-weight: 600;
  transition: transform var(--transition-fast);
}

.project details[open] summary::after {
  content: "−";
}

.project details p {
  margin: 12px 0 0;
  font-size: 13px;
  line-height: 1.6;
  color: var(--muted);
}

/* --- Experience Section --- */
.experience {
  display: grid;
  grid-template-columns: 1fr 1.35fr;
  gap: 80px;
}

.experience-intro h2 {
  margin-bottom: 20px;
}

.experience-intro .intro {
  font-size: 16px;
  color: var(--muted);
  line-height: 1.7;
}

.timeline {
  display: flex;
  flex-direction: column;
}

.entry {
  position: relative;
  padding: 0 0 32px 28px;
  border-left: 2px solid var(--line);
  margin-left: 4px;
}

.entry::before {
  content: "";
  position: absolute;
  left: -6px;
  top: 4px;
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--paper);
  border: 2px solid var(--green);
}

.entry:last-child {
  border-left-color: transparent;
  padding-bottom: 0;
}

.date {
  display: inline-block;
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 600;
  letter-spacing: 0.08em;
  color: var(--green);
  margin-bottom: 6px;
}

.entry h3 {
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 4px 0 8px;
  color: var(--ink);
}

.entry p {
  font-size: 14.5px;
  color: var(--muted);
  margin: 0;
  line-height: 1.6;
}

/* --- Skills Section --- */
.skills {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 32px;
}

.skill-card {
  background: var(--paper-card);
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  padding: 28px 24px;
  transition: transform var(--transition-fast), border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.skill-card:hover {
  transform: translateY(-3px);
  border-color: var(--line-strong);
  box-shadow: 0 10px 24px rgba(20, 39, 37, 0.05);
}

.skill-icon {
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 700;
  color: var(--green);
  margin-bottom: 14px;
  display: inline-block;
}

.skill-card h3 {
  font-size: 17px;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin: 0 0 10px;
  color: var(--ink);
}

.skill-card p {
  font-size: 14px;
  color: var(--muted);
  margin: 0;
  line-height: 1.6;
}

/* --- Contact CTA Banner --- */
.contact {
  background: var(--green);
  color: var(--paper);
  border-radius: var(--radius-lg);
  padding: 56px 52px;
  display: flex;
  gap: 36px;
  align-items: center;
  justify-content: space-between;
  margin: 70px 0 35px;
  position: relative;
  overflow: hidden;
  box-shadow: 0 20px 40px rgba(29, 85, 67, 0.18);
}

.contact::before {
  content: "";
  position: absolute;
  top: -50%;
  right: -20%;
  width: 400px;
  height: 400px;
  border-radius: 50%;
  background: radial-gradient(circle, rgba(217, 237, 154, 0.15) 0%, transparent 70%);
  pointer-events: none;
}

.contact h2 {
  font-size: clamp(28px, 3.5vw, 40px);
  color: #ffffff;
  margin: 0 0 10px;
}

.contact p {
  font-size: 15px;
  color: #d8e5df;
  margin: 0;
  max-width: 460px;
}

.contact-actions {
  display: flex;
  gap: 12px;
  flex-wrap: wrap;
  align-items: center;
  z-index: 1;
}

.contact .button.lime-btn {
  background: var(--lime);
  color: var(--ink);
  font-weight: 700;
}

.contact .button.lime-btn:hover {
  background: #ffffff;
  color: var(--green);
  transform: translateY(-2px);
  box-shadow: 0 6px 18px rgba(0, 0, 0, 0.15);
}

/* --- Footer --- */
footer {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 20px;
  padding: 30px 0 45px;
  color: var(--muted);
  font-size: 12.5px;
}

footer a {
  color: var(--ink);
  font-weight: 500;
}

footer a:hover {
  color: var(--green);
  text-decoration: underline;
}

/* --- Toast Notification (for copies/downloads) --- */
.toast {
  position: fixed;
  bottom: 24px;
  right: 24px;
  background: var(--ink);
  color: #ffffff;
  padding: 12px 20px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-family: var(--font-sans);
  font-weight: 500;
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.2);
  display: flex;
  align-items: center;
  gap: 10px;
  transform: translateY(100px);
  opacity: 0;
  transition: transform 0.3s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.3s ease;
  z-index: 1000;
  pointer-events: none;
}

.toast.show {
  transform: translateY(0);
  opacity: 1;
}

/* --- Responsive Breakpoints --- */
@media (max-width: 960px) {
  .hero {
    grid-template-columns: 1fr;
    gap: 48px;
    padding: 60px 0 70px;
  }

  .terminal {
    max-width: 540px;
    margin: 0 auto;
    transform: none;
  }

  .terminal:hover {
    transform: translateY(-2px);
  }

  .section-head,
  .experience {
    grid-template-columns: 1fr;
    gap: 30px;
  }

  .project {
    grid-template-columns: 40px 1fr;
    gap: 20px;
  }

  .project-content {
    grid-column: 2;
  }

  .skills {
    grid-template-columns: 1fr;
    gap: 16px;
  }

  .contact {
    flex-direction: column;
    text-align: left;
    align-items: flex-start;
    padding: 38px 30px;
  }
}

@media (max-width: 640px) {
  :root {
    --header-height: 70px;
  }

  .wrap {
    padding-left: 20px;
    padding-right: 20px;
  }

  .links {
    gap: 16px;
    font-size: 13px;
  }

  .links .optional {
    display: none;
  }

  .pill-link {
    padding: 6px 14px;
  }

  h1 {
    font-size: 38px;
  }

  .intro {
    font-size: 16px;
  }

  .actions {
    flex-direction: column;
  }

  .actions .button {
    width: 100%;
  }

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

  .number {
    display: none;
  }

  .project-content {
    grid-column: 1;
  }

  .disciplines {
    justify-content: flex-start;
    gap: 10px 20px;
  }

  footer {
    flex-direction: column;
    align-items: flex-start;
    gap: 8px;
  }
}

/* --- Accessibility: Reduced Motion --- */
@media (prefers-reduced-motion: reduce) {
  html {
    scroll-behavior: auto;
  }

  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* --- Print Styles --- */
@media print {
  header, .actions, .contact, footer, .repo, details summary::after {
    display: none !important;
  }

  body {
    background: #ffffff !important;
    color: #000000 !important;
    font-size: 12pt;
  }

  .wrap {
    max-width: 100% !important;
    padding: 0 !important;
  }

  section {
    padding: 24pt 0 !important;
    page-break-inside: avoid;
  }

  details[open], details {
    border: none !important;
    padding: 0 !important;
  }
}