/*
  Tech Resume Theme
  - Modern, accessible, responsive
  - Dark mode by default (toggleable)
*/
:root {
  --bg: #0e1014;
  --panel: #151821;
  --text: #e6e8ef;
  --muted: #a6aabc;
  --accent: #6aa9ff;
  --accent-2: #7df9ff;
  --border: #23283b;
  --shadow: 0 10px 30px rgba(0,0,0,0.25);
}

html[data-theme="light"] {
  --bg: #f6f7fb;
  --panel: #ffffff;
  --text: #11131a;
  --muted: #4a4f61;
  --accent: #2b6cff;
  --accent-2: #0ea5e9;
  --border: #e6e8ef;
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }
body {
  margin: 0;
  font-family: Inter, system-ui, -apple-system, Segoe UI, Roboto, Helvetica, Arial, "Apple Color Emoji", "Segoe UI Emoji";
  color: var(--text);
  background: var(--bg);
  line-height: 1.6;
}
img { max-width: 100%; display: block; border-radius: 12px; }

/* Prevent horizontal scroll on small screens */
body { overflow-x: hidden; }

a { color: var(--text); text-decoration: none; }
a:hover { color: var(--accent); }

.container {
  width: min(1100px, 92%);
  margin: 0 auto;
}

.skip-link {
  position: absolute; left: -9999px; top: auto; width: 1px; height: 1px; overflow: hidden;
}
.skip-link:focus { left: 1rem; top: 1rem; width: auto; height: auto; padding: .5rem .75rem; background: var(--panel); border-radius: 8px; }

/* Header */
.site-header {
  position: sticky; top: 0; z-index: 100;
  background: rgba(10,12,17,.6);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.nav { display: flex; align-items: center; gap: 1rem; padding: .75rem 0; }
.brand { display: flex; align-items: center; gap: .6rem; font-weight: 700; }
.logo { display: inline-grid; place-items: center; width: 32px; height: 32px; border-radius: 8px; background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #0b1020; font-weight: 800; }
.brand-name { letter-spacing: .3px; }

.primary-nav { margin-left: auto; }
.menu { display: flex; gap: 1rem; list-style: none; margin: 0; padding: 0; }
.menu a { padding: .5rem .6rem; border-radius: 8px; }
.menu a:hover { background: var(--panel); }
.nav-toggle { display: none; }

.actions { display: flex; align-items: center; gap: .6rem; margin-left: 1rem; }
.theme-toggle { background: none; border: 1px solid var(--border); color: var(--text); border-radius: 10px; padding: .4rem .6rem; cursor: pointer; }

.btn { display: inline-block; padding: .7rem 1rem; border-radius: 10px; border: 1px solid var(--border); background: var(--panel); color: var(--text); }
.btn:hover { transform: translateY(-1px); box-shadow: var(--shadow); }
.btn.primary { background: linear-gradient(135deg, var(--accent), var(--accent-2)); color: #0b1020; border: none; }
.btn.outline { background: transparent; }
.btn.small { padding: .45rem .75rem; font-size: .9rem; }

/* Hero */
.hero { position: relative; }
.hero-inner { display: grid; grid-template-columns: 1.2fr .8fr; gap: 2rem; align-items: center; padding: 3.5rem 0 2.5rem; }
.hero-text .eyebrow { color: var(--muted); text-transform: uppercase; letter-spacing: .18em; font-size: .75rem; }
.hero h1 { font-size: clamp(2rem, 5vw, 3rem); margin: .25rem 0 .5rem; }
.hero .lede { color: var(--muted); font-size: 1.05rem; max-width: 56ch; }
.cta { display: flex; gap: .8rem; margin-top: 1rem; }
.hero .cta .btn { text-align: center; }
.quick-stats { display: flex; gap: 1.2rem; list-style: none; padding: 0; margin: 1.2rem 0 0; color: var(--muted); }
.quick-stats strong { color: var(--text); }
.hero-media { min-height: 320px; border-radius: 16px; background: url('https://images.unsplash.com/photo-1518770660439-4636190af475?auto=format&fit=crop&w=1600&q=80') center/cover no-repeat; border: 1px solid var(--border); box-shadow: var(--shadow); }
.accent { background: linear-gradient(135deg, var(--accent), var(--accent-2)); -webkit-background-clip: text; background-clip: text; color: transparent; }

/* Allow highlight list to wrap on small screens */
.quick-stats { flex-wrap: wrap; }

/* Sections */
.section { padding: 3.5rem 0; }
.section.alt { background: linear-gradient(180deg, rgba(255,255,255,.02), rgba(0,0,0,0)); }
.section h2 { margin: 0 0 1rem; font-size: 1.6rem; }
.grid.two { display: grid; grid-template-columns: 1fr 1fr; gap: 2rem; align-items: center; }

.tags { display: flex; flex-wrap: wrap; gap: .5rem; padding: 0; list-style: none; }
.tags li { background: var(--panel); border: 1px solid var(--border); padding: .35rem .6rem; border-radius: 999px; color: var(--muted); }
.tags.small li { font-size: .85rem; padding: .25rem .5rem; }

/* Skills */
.skills-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: .8rem; }
.skill-card { background: var(--panel); border: 1px solid var(--border); padding: 1rem; border-radius: 12px; }
.skill-card span { font-weight: 600; }
.skill-card small { color: var(--muted); display: block; margin-top: .2rem; }

/* Timeline */
.timeline { list-style: none; padding: 0; margin: 0; border-left: 2px solid var(--border); margin-left: .6rem; }
.timeline li { position: relative; padding: 0 0 1.4rem 1.2rem; }
.timeline-dot { position: absolute; left: -7px; top: .2rem; width: 12px; height: 12px; border-radius: 50%; background: linear-gradient(135deg, var(--accent), var(--accent-2)); box-shadow: 0 0 0 4px rgba(106,169,255,.15); }
.timeline-content small { color: var(--muted); }
.timeline-content h3 { margin: 0.1rem 0 .2rem; font-size: 1.05rem; }

/* Projects */
.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.project { background: var(--panel); border: 1px solid var(--border); border-radius: 14px; overflow: hidden; display: grid; grid-template-rows: auto 1fr; }
.project .media img { aspect-ratio: 16/9; object-fit: cover; }
.project .content { padding: .9rem; }
.project h3 { margin: .2rem 0 .3rem; }

/* Screenshot hover effect */
.project .media { position: relative; }
.project .media img.screenshot {
  filter: blur(2px) saturate(0.95);
  transform: translate(var(--tx, 0), var(--ty, 0)) scale(1.03);
  transition: transform .35s cubic-bezier(.2,.8,.2,1), filter .25s ease-out, box-shadow .35s ease-out;
  will-change: transform, filter;
}

.project:hover .media img.screenshot,
.project .media:hover img.screenshot,
.project .media:focus-within img.screenshot {
  filter: blur(0);
  transform: translate(var(--tx, 0), var(--ty, 0)) scale(1);
}

/* Soft glow overlay */
.project .media::after {
  content: "";
  position: absolute; inset: 0; pointer-events: none;
  box-shadow: 0 20px 60px rgba(106,169,255,.25), 0 10px 30px rgba(125,249,255,.15) inset;
  opacity: 0; transition: opacity .35s ease-out;
  border-radius: 12px;
}
.project:hover .media::after,
.project .media:hover::after,
.project .media:focus-within::after { opacity: 1; }

@media (prefers-reduced-motion: reduce) {
  .project .media img.screenshot { transition: none; }
}

/* Full-bleed project section */
#project.full-bleed > .container { width: 100%; }
#project.full-bleed .projects-grid { grid-template-columns: 1fr; }
#project.full-bleed .project { border-radius: 0; }

/* Education */
.edu { list-style: none; padding: 0; margin: 0; }
.edu h3 { margin: .1rem 0; white-space: nowrap; }
.edu-media { max-width: 560px; }

/* Contact */
.contact-cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1rem; }
.contact-card { display: flex; gap: .8rem; align-items: center; background: var(--panel); border: 1px solid var(--border); padding: .9rem; border-radius: 12px; cursor: pointer; }
.contact-card .icon { font-size: 1.3rem; }

/* Footer */
.site-footer { padding: 2rem 0; border-top: 1px solid var(--border); color: var(--muted); }
.site-footer .attribution { font-size: .85rem; }

/* Responsive */
@media (max-width: 960px) {
  .hero-inner { grid-template-columns: 1fr; }
  .grid.two { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-cards { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  /* Scope dropdown to nav and ensure it doesn't cause horizontal scroll */
  .primary-nav { position: relative; }
  .menu { display: none; position: absolute; right: .5rem; top: calc(100% + .5rem); background: var(--panel); border: 1px solid var(--border); border-radius: 12px; padding: .5rem; flex-direction: column; width: min(86vw, 280px); max-width: 92vw; }
  .menu.show { display: flex; }
  /* Also support pure-ARIA toggle if JS fails */
  .nav-toggle[aria-expanded="true"] + .menu { display: flex; }
  .nav-toggle { display: inline-flex; align-items: center; justify-content: center; width: 38px; height: 36px; border-radius: 8px; background: var(--panel); border: 1px solid var(--border); color: var(--text); }
  .actions { margin-left: .5rem; }
  /* Place actions before nav-toggle so the hamburger is at the far right on mobile */
  .actions { order: 1; }
  .primary-nav { order: 2; margin-left: auto; }
}

/* Improve readability and prevent overflow on very small screens */
@media (max-width: 640px) {
  /* Let long education headings wrap */
  .edu h3 { white-space: normal; }
  /* Tweak hero spacing */
  .hero-inner { gap: 1.25rem; padding: 2.5rem 0 1.75rem; }
  .hero .lede { font-size: 1rem; }
  /* Stack call-to-actions */
  .cta { flex-direction: column; align-items: stretch; }
  /* Reduce section spacing slightly */
  .section { padding: 2.5rem 0; }
  /* Make skills/projects single column to avoid squish */
  .skills-grid { grid-template-columns: 1fr; }
  .projects-grid { grid-template-columns: 1fr; }
}

@media (max-width: 480px) {
  /* Keep header tidy on narrow screens and keep actions inline with hamburger */
  .nav { flex-wrap: nowrap; align-items: center; gap: .5rem; }
  .brand-name { display: none; }
  .actions { order: 0; width: auto; margin: 0 0 0 .5rem; display: flex; align-items: center; gap: .4rem; }
  .actions .btn.small { padding: .4rem .6rem; }
  /* Slightly smaller hero media to fit viewport */
  .hero-media { min-height: 220px; }
}

/* Back to Top Button */
.back-to-top {
  position: fixed;
  bottom: 5rem;
  right: 4rem;
  width: 56px;
  height: 56px;
  border-radius: 50%;
  background: var(--panel);
  border: 1px solid var(--border);
  color: var(--text);
  cursor: pointer;
  display: grid;
  place-items: center;
  box-shadow: var(--shadow);
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity .3s ease, transform .3s ease, visibility .3s, background-color .2s ease;
  z-index: 999;
}

.back-to-top svg {
  width: 28px;
  height: 28px;
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: linear-gradient(135deg, var(--accent), var(--accent-2));
  color: #0b1020;
  transform: translateY(-2px);
}

.back-to-top:active {
  transform: translateY(0);
}

@media (prefers-reduced-motion: reduce) {
  .back-to-top { transition: none !important; }
}

/* Adjust toast container to avoid overlap with back-to-top button */
@media (max-width: 640px) {
  .back-to-top {
    bottom: 4.5rem;
    right: 2rem;
    width: 52px;
    height: 52px;
  }
  
  .back-to-top svg {
    width: 26px;
    height: 26px;
  }
}

/* Toasts */
.toast-container {
  position: fixed;
  right: 1rem;
  bottom: 1rem;
  display: flex;
  flex-direction: column;
  gap: .5rem;
  z-index: 1000;
  pointer-events: none;
}
.toast {
  pointer-events: auto;
  background: var(--panel);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: .5rem .75rem;
  box-shadow: var(--shadow);
  font-size: .9rem;
  opacity: 0;
  transform: translateY(8px);
  transition: opacity .2s ease, transform .2s ease;
}
.toast.show { opacity: 1; transform: translateY(0); animation: toast-in .2s ease-out; }
.toast.hiding { opacity: 0; transform: translateY(8px); }

@keyframes toast-in { from { opacity: 0; transform: translateY(8px); } to { opacity: 1; transform: translateY(0); } }

@media (prefers-reduced-motion: reduce) {
  .toast, .toast.show, .toast.hiding { transition: none !important; animation: none !important; }
}