/* Dave's portfolio — "field notes" theme: warm paper, ink, forest green, terracotta highlights. */

:root {
  --paper: #f5efe4;
  --paper-2: #ece4d4;
  --card: #fbf8f2;
  --ink: #1e1c18;
  --ink-2: #4a463d;
  --muted: #6d675b;
  --line: #d9cfbc;
  --forest: #1f4d3f;
  --forest-2: #2b6a57;
  --clay: #d9603b;
  --clay-soft: rgba(217, 96, 59, 0.18);
  --marker: rgba(242, 190, 76, 0.55);
  --shadow: 0 1px 0 rgba(30, 28, 24, 0.06), 0 10px 30px -18px rgba(30, 28, 24, 0.35);
  --radius: 14px;
  --display: "Fraunces", Georgia, "Times New Roman", serif;
  --body: "Source Sans 3", "Segoe UI", system-ui, sans-serif;
  --mono: "JetBrains Mono", ui-monospace, Consolas, monospace;
  --nav-h: 68px;
}

[data-theme="dark"] {
  --paper: #161a17;
  --paper-2: #1d231f;
  --card: #1f2621;
  --ink: #efe9dd;
  --ink-2: #cfc8b9;
  --muted: #a39d8f;
  --line: #333c35;
  --forest: #7cc4a6;
  --forest-2: #9ad6bc;
  --clay: #f08a64;
  --clay-soft: rgba(240, 138, 100, 0.18);
  --marker: rgba(242, 190, 76, 0.28);
  --shadow: 0 1px 0 rgba(0, 0, 0, 0.3), 0 14px 30px -18px rgba(0, 0, 0, 0.8);
}

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

html { scroll-behavior: smooth; scroll-padding-top: calc(var(--nav-h) + 12px); }

body {
  font-family: var(--body);
  font-size: 1.0625rem;
  line-height: 1.65;
  color: var(--ink);
  background-color: var(--paper);
  background-image: radial-gradient(var(--line) 0.6px, transparent 0.6px);
  background-size: 22px 22px;
  overflow-x: hidden;
  transition: background-color 0.3s ease, color 0.3s ease;
}

a { color: var(--forest); text-underline-offset: 3px; }
a:hover { color: var(--clay); }
img { max-width: 100%; display: block; }
ul, ol { list-style: none; }

:focus-visible { outline: 3px solid var(--clay); outline-offset: 3px; border-radius: 6px; }

.skip-link {
  position: absolute; left: 1rem; top: -60px; z-index: 200;
  background: var(--ink); color: var(--paper); padding: 0.6rem 1rem; border-radius: 8px;
}
.skip-link:focus { top: 1rem; }

.container { max-width: 1120px; margin: 0 auto; padding: 0 24px; }
section { padding: 96px 0; position: relative; }

/* ---------- Nav ---------- */
.navbar {
  position: fixed; inset: 0 0 auto 0; z-index: 100; height: var(--nav-h);
  background: color-mix(in srgb, var(--paper) 86%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 0.25s ease, background-color 0.3s ease;
}
.navbar.scrolled { border-bottom-color: var(--line); }
.nav-container {
  max-width: 1120px; height: 100%; margin: 0 auto; padding: 0 24px;
  display: flex; align-items: center; justify-content: space-between; gap: 1rem;
}
.logo {
  display: inline-flex; align-items: center; gap: 0.6rem; text-decoration: none;
  font-family: var(--display); font-weight: 700; font-size: 1.35rem; color: var(--ink);
}
.logo:hover { color: var(--ink); }
.logo-mark {
  display: inline-grid; place-items: center; width: 34px; height: 34px; border-radius: 10px;
  background: var(--forest); color: var(--paper); font-family: var(--display); font-size: 1.1rem;
  transition: transform 0.3s cubic-bezier(.3,1.6,.5,1);
}
.logo:hover .logo-mark { transform: rotate(-8deg) scale(1.06); }
.logo-dot { color: var(--clay); }

.nav-menu { display: flex; gap: 0.25rem; }
.nav-link {
  position: relative; display: block; padding: 0.45rem 0.75rem; border-radius: 999px;
  color: var(--ink-2); text-decoration: none; font-weight: 500; font-size: 0.97rem;
  transition: color 0.2s ease, background-color 0.2s ease;
}
.nav-link:hover { color: var(--ink); background: var(--paper-2); }
.nav-link.active { color: var(--paper); background: var(--ink); }

.nav-actions { display: flex; align-items: center; gap: 0.5rem; }
.icon-btn {
  width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--line);
  background: var(--card); color: var(--ink); cursor: pointer; font-size: 1rem;
  transition: transform 0.2s ease, border-color 0.2s ease;
}
.icon-btn:hover { transform: rotate(-15deg); border-color: var(--ink-2); }

.nav-toggle {
  display: none; flex-direction: column; justify-content: center; gap: 5px;
  width: 40px; height: 40px; border-radius: 10px; border: 1px solid var(--line);
  background: var(--card); cursor: pointer; padding: 0 10px;
}
.nav-toggle .bar { height: 2px; background: var(--ink); border-radius: 2px; transition: transform 0.25s ease, opacity 0.2s ease; }
.nav-toggle.active .bar:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle.active .bar:nth-child(2) { opacity: 0; }
.nav-toggle.active .bar:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.read-progress { position: absolute; left: 0; right: 0; bottom: -1px; height: 2px; }
.read-progress span { display: block; height: 100%; width: 0; background: var(--clay); transition: width 0.1s linear; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; gap: 0.55rem; padding: 0.8rem 1.3rem;
  border-radius: 999px; font: 600 1rem var(--body); text-decoration: none; cursor: pointer;
  border: 1.5px solid var(--ink);
  transition: transform 0.18s ease, box-shadow 0.18s ease, background-color 0.2s ease, color 0.2s ease;
}
.btn-primary { background: var(--ink); color: var(--paper); box-shadow: 3px 3px 0 var(--clay); }
.btn-primary:hover { color: var(--paper); transform: translate(-2px, -2px); box-shadow: 5px 5px 0 var(--clay); }
.btn-primary:active { transform: translate(1px, 1px); box-shadow: 1px 1px 0 var(--clay); }
.btn-ghost { background: transparent; color: var(--ink); }
.btn-ghost:hover { background: var(--ink); color: var(--paper); }

/* ---------- Hero ---------- */
.hero { padding: calc(var(--nav-h) + 72px) 0 88px; min-height: 92vh; display: flex; align-items: center; }
.hero-grid { display: grid; grid-template-columns: 1.25fr 0.85fr; gap: 64px; align-items: center; }
.hero-greeting {
  display: inline-flex; align-items: center; gap: 0.55rem;
  font-family: var(--mono); font-size: 0.9rem; color: var(--muted); letter-spacing: 0.02em;
}
.status-dot { width: 9px; height: 9px; border-radius: 50%; background: #3fa66b; box-shadow: 0 0 0 0 rgba(63,166,107,.6); animation: pulse 2.4s infinite; }
@keyframes pulse { 0% { box-shadow: 0 0 0 0 rgba(63,166,107,.55); } 70% { box-shadow: 0 0 0 10px rgba(63,166,107,0); } 100% { box-shadow: 0 0 0 0 rgba(63,166,107,0); } }
.hero-name {
  font-family: var(--display); font-weight: 700; line-height: 1.02; letter-spacing: -0.02em;
  font-size: clamp(2.8rem, 7vw, 5.2rem); margin: 0.6rem 0 1rem; font-variation-settings: "opsz" 144;
}
.hero-title { display: flex; flex-wrap: wrap; gap: 0.4rem 0.5rem; margin-bottom: 1.4rem; }
.hero-title span {
  font-family: var(--mono); font-size: 0.82rem; padding: 0.3rem 0.7rem; border-radius: 6px;
  border: 1px dashed var(--line); color: var(--ink-2); background: var(--card);
}
.hero-description { font-size: 1.18rem; color: var(--ink-2); max-width: 36em; }
.hero-buttons { display: flex; flex-wrap: wrap; gap: 0.9rem; margin: 2rem 0 1.6rem; }
.social-links { display: flex; align-items: center; gap: 0.6rem; color: var(--muted); font-size: 0.95rem; }
.social-link {
  display: grid; place-items: center; width: 40px; height: 40px; border-radius: 50%;
  border: 1px solid var(--line); color: var(--ink); font-size: 1.1rem; text-decoration: none;
  transition: transform 0.2s ease, background-color 0.2s ease, color 0.2s ease;
}
.social-link:hover { background: var(--forest); color: var(--paper); transform: translateY(-3px); }

.hero-image { position: relative; justify-self: center; }
.photo-frame {
  position: relative; width: min(360px, 80vw); aspect-ratio: 5 / 6.3; border-radius: 22px; overflow: hidden;
  border: 1.5px solid var(--ink); box-shadow: 10px 10px 0 var(--forest);
  transform: rotate(1.5deg); transition: transform 0.4s cubic-bezier(.3,1.4,.5,1), box-shadow 0.4s ease;
}
.photo-frame:hover { transform: rotate(0deg) translateY(-4px); box-shadow: 14px 14px 0 var(--clay); }
.photo-frame img { width: 100%; height: 100%; object-fit: cover; }
.photo-tag {
  position: absolute; left: -18px; bottom: 26px; padding: 0.45rem 0.8rem; border-radius: 8px;
  background: var(--card); border: 1px solid var(--line); box-shadow: var(--shadow);
  font-family: var(--mono); font-size: 0.78rem; color: var(--ink-2); transform: rotate(-3deg);
}

/* Annotation highlight — a nod to the work itself */
mark.note {
  position: relative; color: inherit; padding: 0 0.15em; border-radius: 3px;
  background: linear-gradient(transparent 55%, var(--marker) 55%);
  transition: background 0.3s ease;
}
mark.note::after {
  content: attr(data-note); position: absolute; left: 50%; top: -1.9em; transform: translate(-50%, 4px);
  font: 500 0.7rem var(--mono); padding: 0.15rem 0.45rem; border-radius: 4px; white-space: nowrap;
  background: var(--ink); color: var(--paper); opacity: 0; pointer-events: none; transition: opacity .2s ease, transform .2s ease;
}
mark.note:hover { background: linear-gradient(transparent 20%, var(--marker) 20%); }
mark.note:hover::after { opacity: 1; transform: translate(-50%, 0); }

/* ---------- Section heads ---------- */
.section-head { margin-bottom: 2.8rem; }
.section-index { font-family: var(--mono); font-size: 0.85rem; color: var(--clay); letter-spacing: 0.08em; }
.section-index::after { content: ""; display: inline-block; width: 44px; height: 1px; background: var(--clay); margin-left: 0.6rem; vertical-align: middle; }
.section-title { font-family: var(--display); font-weight: 600; font-size: clamp(2rem, 4vw, 2.8rem); letter-spacing: -0.015em; line-height: 1.1; margin-top: 0.4rem; }
.section-subtitle { color: var(--muted); margin-top: 0.5rem; font-size: 1.05rem; }

/* ---------- About ---------- */
.about { background: var(--card); border-block: 1px solid var(--line); }
.about-grid { display: grid; grid-template-columns: 0.7fr 1.3fr; gap: 56px; }
.about-text p { margin-bottom: 1.1rem; color: var(--ink-2); }
.about-text .lede { font-size: 1.28rem; color: var(--ink); line-height: 1.55; }
.education-line { padding: 1rem 1.2rem; border-left: 3px solid var(--forest); background: var(--paper); border-radius: 0 10px 10px 0; font-size: 0.98rem; }
.stats { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; margin-top: 1.8rem; }
.stat { padding: 1.1rem 1.2rem; border: 1px solid var(--line); border-radius: var(--radius); background: var(--paper); transition: transform .2s ease, border-color .2s ease; }
.stat:hover { transform: translateY(-3px); border-color: var(--forest); }
.stat dt { font-family: var(--display); font-weight: 700; font-size: 2.3rem; line-height: 1; color: var(--forest); }
.stat dd { margin-top: 0.4rem; color: var(--muted); font-size: 0.93rem; }

/* ---------- Services ---------- */
.services-list { display: grid; grid-template-columns: repeat(3, 1fr); border-top: 1.5px solid var(--ink); counter-reset: svc; }
.service { counter-increment: svc; padding: 1.8rem 1.6rem 2rem 0; border-right: 1px solid var(--line); position: relative; transition: background-color .25s ease; }
.service + .service { padding-left: 1.6rem; }
.service:last-child { border-right: 0; }
.service::before { content: "0" counter(svc); position: absolute; top: 1.8rem; right: 1.4rem; font: 500 0.8rem var(--mono); color: var(--muted); }
.service-icon {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; font-size: 1.3rem;
  background: var(--clay-soft); color: var(--clay); margin-bottom: 1.2rem; transition: transform .3s cubic-bezier(.3,1.6,.5,1);
}
.service:hover .service-icon { transform: rotate(-8deg) scale(1.08); }
.service h3 { font-family: var(--display); font-weight: 600; font-size: 1.35rem; margin-bottom: 0.6rem; }
.service p { color: var(--ink-2); }

/* ---------- Skills ---------- */
.skills-grid { columns: 2 340px; column-gap: 1.25rem; }
.skill-category {
  break-inside: avoid; margin-bottom: 1.25rem; padding: 1.4rem; border-radius: var(--radius);
  background: var(--card); border: 1px solid var(--line); transition: border-color .2s ease, transform .2s ease, box-shadow .2s ease;
}
.skill-category:hover, .skill-category:focus-visible { border-color: var(--ink-2); transform: translateY(-2px); box-shadow: var(--shadow); }
.skill-category h3 { font-family: var(--display); font-weight: 600; font-size: 1.15rem; margin-bottom: 0.9rem; }
.skill-tags { display: flex; flex-wrap: wrap; gap: 0.45rem; }
.skill-tags span {
  font-size: 0.9rem; padding: 0.3rem 0.75rem; border-radius: 999px; background: var(--paper);
  border: 1px solid var(--line); color: var(--ink-2); transition: background-color .2s ease, color .2s ease, border-color .2s ease;
}
.skill-category:hover .skill-tags span, .skill-category:focus-visible .skill-tags span { border-color: var(--forest); }
.skill-tags span:hover { background: var(--forest); color: var(--paper); }

/* ---------- Experience timeline ---------- */
.experience { background: var(--card); border-block: 1px solid var(--line); }
.timeline { position: relative; }
.timeline::before { content: ""; position: absolute; left: 210px; top: 8px; bottom: 8px; width: 2px; background: repeating-linear-gradient(var(--line) 0 6px, transparent 6px 12px); }
.timeline-item { display: grid; grid-template-columns: 210px 1fr; gap: 2.4rem; padding-bottom: 2.6rem; position: relative; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: ""; position: absolute; left: 204px; top: 8px; width: 14px; height: 14px; border-radius: 50%;
  background: var(--card); border: 2.5px solid var(--forest); transition: background-color .2s ease, transform .2s ease;
}
.timeline-item:hover::before { background: var(--clay); border-color: var(--clay); transform: scale(1.25); }
.cert-date { font-family: var(--mono); font-size: 0.85rem; color: var(--muted); padding-top: 2px; text-align: right; padding-right: 1rem; }
.timeline-body h3 { font-family: var(--display); font-weight: 600; font-size: 1.4rem; margin-bottom: 0.2rem; }
.timeline-body h3 i { color: var(--clay); font-size: 1rem; margin-right: 0.35rem; }
.timeline-body .where { color: var(--forest); margin-bottom: 0.6rem; }
.timeline-body p { color: var(--ink-2); max-width: 46em; }

/* ---------- Projects ---------- */
.filter-bar { display: flex; flex-wrap: wrap; gap: 0.5rem; margin-bottom: 1.5rem; }
.chip {
  font: 500 0.95rem var(--body); padding: 0.45rem 0.95rem; border-radius: 999px; cursor: pointer;
  border: 1px solid var(--line); background: var(--card); color: var(--ink-2); transition: all .2s ease;
}
.chip:hover { border-color: var(--ink-2); color: var(--ink); }
.chip.is-active { background: var(--ink); border-color: var(--ink); color: var(--paper); }
.chip-count { font-family: var(--mono); font-size: 0.75rem; opacity: 0.7; margin-left: 0.2rem; }
.project-list { border-top: 1.5px solid var(--ink); }
.project-row {
  display: grid; grid-template-columns: 48px 56px 1fr auto; gap: 1.4rem; align-items: center;
  padding: 1.5rem 0.75rem; border-bottom: 1px solid var(--line); border-radius: 0;
  transition: background-color .2s ease, padding .25s ease, opacity .3s ease;
}
.project-row:hover { background: var(--card); padding-left: 1.25rem; }
.project-row.is-hidden { display: none; }
.project-num { font-family: var(--mono); color: var(--muted); font-size: 0.85rem; }
.project-icon {
  width: 52px; height: 52px; border-radius: 14px; display: grid; place-items: center; font-size: 1.3rem;
  background: var(--paper-2); color: var(--forest); transition: transform .3s cubic-bezier(.3,1.6,.5,1), background-color .2s ease, color .2s ease;
}
.project-row:hover .project-icon { transform: rotate(-6deg); background: var(--forest); color: var(--paper); }
.project-content h3 { font-family: var(--display); font-weight: 600; font-size: 1.35rem; }
.project-content p { color: var(--ink-2); max-width: 44em; margin: 0.2rem 0 0.6rem; }
.project-tech { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.project-tech span { font-family: var(--mono); font-size: 0.75rem; padding: 0.15rem 0.5rem; border-radius: 4px; background: var(--paper-2); color: var(--ink-2); }
.project-links { display: flex; flex-direction: column; align-items: flex-end; gap: 0.4rem; }
.project-link {
  display: inline-flex; align-items: center; gap: 0.45rem; font-weight: 600; text-decoration: none;
  padding: 0.4rem 0.9rem; border-radius: 999px; border: 1.5px solid var(--ink); color: var(--ink); white-space: nowrap;
  transition: background-color .2s ease, color .2s ease;
}
.project-link i.fa-arrow-right { transition: transform .2s ease; }
.project-link:hover { background: var(--ink); color: var(--paper); }
.project-link:hover i.fa-arrow-right { transform: translateX(3px); }
.project-link.subtle { border-color: transparent; color: var(--muted); font-weight: 500; }
.project-link.subtle:hover { background: transparent; color: var(--clay); }

/* ---------- Contact ---------- */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: start; }
.contact-info h3 { font-family: var(--display); font-weight: 600; font-size: 1.4rem; margin-bottom: 0.6rem; }
.contact-info > p { color: var(--ink-2); margin-bottom: 1.6rem; }
.contact-items { display: grid; gap: 0.75rem; }
.contact-item {
  display: flex; align-items: center; gap: 0.85rem; padding: 0.85rem 1rem; border-radius: 12px;
  background: var(--card); border: 1px solid var(--line); word-break: break-word;
}
.contact-item i { color: var(--clay); width: 1.1rem; text-align: center; }
.contact-item a { color: var(--ink); text-decoration: none; flex: 1; }
.contact-item a:hover { color: var(--clay); text-decoration: underline; }
.copy-btn {
  font: 500 0.8rem var(--mono); padding: 0.3rem 0.65rem; border-radius: 6px; cursor: pointer;
  border: 1px solid var(--line); background: var(--paper); color: var(--ink-2); transition: all .2s ease;
}
.copy-btn:hover { border-color: var(--forest); color: var(--forest); }
.copy-btn.done { background: var(--forest); color: var(--paper); border-color: var(--forest); }

.contact-form { padding: 1.8rem; border-radius: 18px; background: var(--card); border: 1.5px solid var(--ink); box-shadow: 8px 8px 0 var(--paper-2); }
.form-note { font-size: 0.92rem; color: var(--muted); margin-bottom: 1.2rem; }
.form-group { margin-bottom: 1rem; }
.form-group label { display: flex; justify-content: space-between; font-weight: 600; font-size: 0.93rem; margin-bottom: 0.35rem; }
.char-count { font: 400 0.78rem var(--mono); color: var(--muted); }
.form-group input, .form-group textarea {
  width: 100%; padding: 0.8rem 0.95rem; border-radius: 10px; border: 1.5px solid var(--line);
  background: var(--paper); color: var(--ink); font: inherit; transition: border-color .2s ease, box-shadow .2s ease;
}
.form-group textarea { resize: vertical; min-height: 130px; }
.form-group input:focus, .form-group textarea:focus { outline: none; border-color: var(--forest); box-shadow: 0 0 0 4px color-mix(in srgb, var(--forest) 18%, transparent); }
.form-group input[aria-invalid="true"], .form-group textarea[aria-invalid="true"] { border-color: var(--clay); }
.form-error { color: var(--clay); font-size: 0.92rem; min-height: 1.3em; margin-bottom: 0.6rem; }
.submit-btn { width: 100%; justify-content: center; }

/* ---------- Footer ---------- */
.footer { padding: 56px 0 28px; border-top: 1px solid var(--line); }
.footer-content { display: flex; justify-content: space-between; gap: 2rem; flex-wrap: wrap; align-items: flex-start; }
.footer-left { max-width: 34em; }
.footer-logo { display: flex; align-items: center; gap: 0.6rem; font-family: var(--display); font-weight: 600; font-size: 1.2rem; margin-bottom: 0.6rem; }
.footer-left p { color: var(--muted); font-size: 0.95rem; }
.footer-right { display: flex; flex-direction: column; align-items: flex-end; gap: 0.8rem; }
.footer-social { display: flex; gap: 0.5rem; }
.footer-social a { display: grid; place-items: center; width: 40px; height: 40px; border-radius: 50%; border: 1px solid var(--line); color: var(--ink); text-decoration: none; transition: all .2s ease; }
.footer-social a:hover { background: var(--ink); color: var(--paper); }
.kbd-hint { background: none; border: 0; color: var(--muted); font: inherit; font-size: 0.88rem; cursor: pointer; }
.kbd-hint:hover { color: var(--ink); }
kbd { font: 500 0.78rem var(--mono); padding: 0.1rem 0.4rem; border-radius: 5px; border: 1px solid var(--line); border-bottom-width: 2px; background: var(--card); color: var(--ink); }
.footer-bottom { margin-top: 2.2rem; padding-top: 1.2rem; border-top: 1px dashed var(--line); color: var(--muted); font-size: 0.88rem; }

/* ---------- Dialog, toast, back-to-top ---------- */
.kbd-dialog { margin: auto; border: 1.5px solid var(--ink); border-radius: 16px; padding: 1.6rem; background: var(--card); color: var(--ink); width: min(380px, 92vw); box-shadow: 8px 8px 0 var(--forest); }
.kbd-dialog::backdrop { background: rgba(20, 18, 14, 0.45); backdrop-filter: blur(2px); }
.kbd-dialog h2 { font-family: var(--display); font-size: 1.4rem; margin-bottom: 1rem; }
.kbd-dialog dl div { display: flex; justify-content: space-between; padding: 0.5rem 0; border-bottom: 1px dashed var(--line); }
.kbd-dialog dd { color: var(--ink-2); }
.kbd-dialog form { margin-top: 1.2rem; text-align: right; }

.toast {
  position: fixed; left: 50%; bottom: 28px; transform: translate(-50%, calc(100% + 48px)); z-index: 300; visibility: hidden;
  background: var(--ink); color: var(--paper); padding: 0.7rem 1.1rem; border-radius: 10px; font-weight: 500;
  box-shadow: 4px 4px 0 var(--clay); transition: transform .3s cubic-bezier(.3,1.4,.5,1), visibility 0s linear .3s;
}
.toast.show { transform: translate(-50%, 0); visibility: visible; transition-delay: 0s; }

.back-to-top {
  position: fixed; right: 22px; bottom: 22px; z-index: 90; width: 46px; height: 46px; border-radius: 50%;
  border: 1.5px solid var(--ink); background: var(--card); color: var(--ink); cursor: pointer;
  opacity: 0; transform: translateY(16px); pointer-events: none; transition: all .25s ease;
}
.back-to-top.visible { opacity: 1; transform: none; pointer-events: auto; }
.back-to-top:hover { background: var(--ink); color: var(--paper); }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: none; }

/* ---------- Responsive ---------- */
@media (max-width: 960px) {
  .nav-menu {
    position: fixed; top: var(--nav-h); left: 0; right: 0; flex-direction: column; gap: 0;
    background: var(--paper); border-bottom: 1px solid var(--line); padding: 0.6rem 1rem 1rem;
    transform: translateY(-120%); transition: transform .3s ease; visibility: hidden;
  }
  .nav-menu.active { transform: none; visibility: visible; }
  .nav-link { padding: 0.8rem 1rem; border-radius: 10px; }
  .nav-toggle { display: flex; }
  .hero-grid, .about-grid, .contact-grid { grid-template-columns: 1fr; gap: 40px; }
  .hero { min-height: auto; }
  .hero-image { order: -1; justify-self: start; }
  .photo-frame { width: min(260px, 70vw); }
  .services-list { grid-template-columns: 1fr; }
  .service, .service + .service { padding: 1.6rem 0; border-right: 0; border-bottom: 1px solid var(--line); }
  .service::before { right: 0; }
}
@media (max-width: 640px) {
  section { padding: 72px 0; }
  .stats { grid-template-columns: 1fr 1fr; }
  .timeline::before { left: 6px; }
  .timeline-item { grid-template-columns: 1fr; gap: 0.3rem; padding-left: 2rem; }
  .timeline-item::before { left: 0; }
  .cert-date { text-align: left; }
  .project-row { grid-template-columns: 44px 1fr; gap: 0.9rem 1rem; }
  .project-num { display: none; }
  .project-links { grid-column: 1 / -1; flex-direction: row; justify-content: flex-start; }
  .footer-right { align-items: flex-start; }
  .photo-tag { left: 8px; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation: none !important; transition: none !important; scroll-behavior: auto !important; }
  .reveal { opacity: 1; transform: none; }
}