/*
  Shared stylesheet for Asif Shaikat's portfolio and blog.

  This file defines a minimal terminal‑inspired theme with a single accent colour,
  fluid typography, responsive grid layouts, and card components used across
  both pages. Keeping styles in one place makes it easy to maintain and deploy.
*/

/* Colour palette and typography variables */
:root {
  --bg: #0a0a0b;
  --panel: #141517;
  --ink: #f0f0f2;
  --muted: #a7a7ad;
  --accent: #e4c36a;
  --edge: #2a2b2f;

  /* Fonts */
  --font-sans: "Inter", system-ui, -apple-system, Segoe UI, Roboto, "Helvetica Neue", Arial, sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;

  /* Fluid type scale */
  --step--1: clamp(0.86rem, 0.80rem + 0.20vw, 0.94rem);
  --step-0: clamp(1.00rem, 0.96rem + 0.25vw, 1.125rem);
  --step-1: clamp(1.15rem, 1.05rem + 0.45vw, 1.35rem);
  --step-2: clamp(1.35rem, 1.20rem + 0.70vw, 1.70rem);
  --step-3: clamp(1.62rem, 1.40rem + 1.00vw, 2.05rem);

  /* Spacing & measure */
  --space-1: 0.25rem;
  --space-2: 0.5rem;
  --space-3: 0.75rem;
  --space-4: 1rem;
  --space-5: 1.5rem;
  --space-6: 2rem;
  --measure: 65ch;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--ink);
  font-family: var(--font-sans);
  font-size: var(--step-0);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  font-feature-settings: "liga", "kern", "calt";
}

/* Grid layout. On wide screens the portfolio uses three columns; blog pages can override max-width via .grid modifier. */
.grid {
  max-width: 1200px;
  margin: 0 auto;
  padding: 2rem 1rem 4rem;
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
@media (min-width: 900px) {
  .grid { grid-template-columns: repeat(3, 1fr); gap: 2rem; }
}

/* A narrower grid can be created by adding the class .narrow-grid to the parent; used on blog page to reduce max width. */
.narrow-grid { max-width: 900px; }

/* Section headings */
.eyebrow {
  margin: 2rem 0 1rem 0;
  padding-bottom: 0.5rem;
  font-family: var(--font-mono);
  font-size: var(--step--1);
  letter-spacing: 0.08em;
  color: var(--muted);
  display: flex;
  align-items: center;
  gap: 0.5rem;
  border-bottom: 1px solid var(--edge);
}
section > .eyebrow:first-child { margin-top: 0; }
.eyebrow span { border-left: 3px solid var(--accent); padding-left: 0.5rem; }

/* Card component */
.box {
  background: var(--panel);
  border: 1px solid var(--edge);
  padding: var(--space-5);
  box-shadow:
    0 2px 4px rgba(0, 0, 0, 0.3),
    0 1px 2px rgba(0, 0, 0, 0.2);
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}
.box + .box { margin-top: 1.25rem; }
.box:hover {
  transform: translateY(-2px);
  box-shadow:
    0 4px 8px rgba(0, 0, 0, 0.4),
    0 2px 4px rgba(0, 0, 0, 0.3);
}
/* Subtle fade-in animation on load; disabled if reduced motion is preferred */
@media (prefers-reduced-motion: no-preference) {
  .box { animation: fadeInUp 0.5s ease-out backwards; }
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateY(20px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Zones share the same accent colour on the left border */
.projects-zone,
.experience-zone,
.academic-zone,
.blog-zone { border-left: 2px solid var(--accent); }

/* Highlighted card (used for intro) */
.highlight {
  background: linear-gradient(135deg, var(--panel) 0%, rgba(228, 195, 106, 0.05) 100%);
  border: 1px solid var(--accent);
}

/* Stats in intro card */
.stats {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
  gap: 1rem;
  text-align: center;
  margin-top: 1rem;
}
.stat-number { display: block; font-size: var(--step-2); font-weight: 600; color: var(--accent); }
.stat-label { display: block; font-size: var(--step--1); color: var(--muted); text-transform: uppercase; letter-spacing: 0.05em; }

/* Navigation lists */
.toc { display: flex; flex-direction: column; gap: 0.5rem; }
.toc a { padding: 0.5rem; border-radius: 4px; text-decoration: none; transition: background 0.2s ease; }
.toc a:hover { background: var(--edge); }

/* Typography */
p { margin: 0 0 1rem 0; line-height: 1.7; max-width: var(--measure); text-wrap: pretty; hyphens: auto; }
.box p:last-child { margin-bottom: 0; }
strong { color: var(--ink); font-weight: 600; }

/* Lists */
.links ul, .list, .compact { list-style: none; padding: 0; margin: 0; }
.list li, .compact li { padding-left: 1rem; position: relative; }
.list li::before, .compact li::before { content: "▸"; position: absolute; left: 0; color: var(--accent); }
.list li + li { margin-top: 0.75rem; }
.links li + li { margin-top: 0.4rem; }
.compact li { margin: 0.15rem 0; }

/* Links */
a { color: var(--accent); text-decoration: underline; text-decoration-thickness: 1px; text-underline-offset: 2px; transition: text-decoration-thickness 0.2s ease; }
a:hover { text-decoration-thickness: 2px; }

/* Project headings */
.project header { margin-bottom: 0.75rem; }
.project h3 { margin: 0 0 0.25rem 0; font: 600 var(--step-1)/1.25 var(--font-sans); }
.project .muted { margin: 0; }
.badge {
  font: 400 var(--step--1)/1 var(--font-mono);
  padding: 0.15rem 0.4rem;
  border: 1px solid var(--accent);
  color: var(--accent);
  margin-left: 0.5rem;
  white-space: nowrap;
  display: inline-block;
}

/* Experience timeline */
.experience-item header {
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-bottom: 0.75rem;
}
.experience-item h4 { margin: 0; font-weight: 600; }
.experience-item time { font-size: var(--step--1); color: var(--muted); font-variant-numeric: tabular-nums; }

/* Saw-tooth divider */
.saw {
  border: none;
  height: 10px;
  margin: 1.5rem 0;
  background: linear-gradient(135deg, transparent 75%, var(--edge) 0) 0 0/10px 10px,
              linear-gradient(225deg, transparent 75%, var(--edge) 0) 0 0/10px 10px;
  background-color: var(--panel);
}

/* Utility classes */
.mt-24 { margin-top: var(--space-5); }
.muted { color: var(--muted); }
.meta { display: flex; gap: 0.75rem; flex-wrap: wrap; color: var(--muted); font-size: var(--step--1); }

/* Responsive adjustments for small screens */
@media (max-width: 899px) {
  .grid { padding: 1rem 0.75rem 3rem; }
  .box { padding: var(--space-4); }
  .meta { flex-direction: column; gap: 0.25rem; }
  .meta span:nth-child(2n) { display: none; }
  .experience-item header { flex-direction: column; align-items: flex-start; }
  .stats { grid-template-columns: 1fr; text-align: left; }
  .stat-number, .stat-label { display: inline; }
  .stat-number::after { content: " "; }
}

/* Sticky section captions on wide screens */
@media (min-width: 900px) {
  section > .eyebrow { position: sticky; top: 0; background: var(--bg); padding-top: var(--space-2); z-index: 1; }
}

/* Focus outlines and skip links */
:focus-visible { outline: 2px dashed var(--accent); outline-offset: 2px; }
.skip { position: absolute; left: -9999px; top: auto; }
.skip:focus { left: 1rem; top: 1rem; background: var(--panel); padding: 0.5rem 0.75rem; border: 1px solid var(--edge); z-index: 100; }

/* Footer */
.footer { max-width: 1200px; margin: 0 auto; padding: 1.25rem 1rem 3rem; color: var(--muted); border-top: 1px solid var(--edge); }
.footer p { margin: 0; text-align: center; }

/* Blog specific components */
.blog-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 1.5rem;
}
@media (min-width: 700px) {
  .blog-grid { grid-template-columns: 1fr 1fr; }
}
.blog-image {
  width: 100%;
  height: auto;
  display: block;
  margin: 0.75rem 0;
  border-radius: 4px;
}
.blog-video { width: 100%; height: 315px; margin: 0.75rem 0; border: none; }
.blog-nav { margin-bottom: 1rem; }
.blog-nav a { font-size: var(--step--1); color: var(--accent); }

/* Headings sizes. Note: h2–h4 are used across pages. */
h1 { font: 600 var(--step-3)/1.15 var(--font-sans); text-wrap: balance; }
h2 { font: 600 var(--step-2)/1.20 var(--font-sans); text-wrap: balance; }
h3 { font: 600 var(--step-1)/1.25 var(--font-sans); }
h4 { font: 600 var(--step-0)/1.3 var(--font-sans); }