/* ============================================================
   Rizwan Khalid — portfolio
   Design: warm editorial. Paper + ink + a single signal accent.
   ============================================================ */

:root {
  --paper:      #f7f4ef;
  --paper-2:    #f1ece4;
  --ink:        #1a1714;
  --ink-soft:   #4a443c;
  --muted:      #847c70;
  --line:       rgba(26, 23, 20, 0.14);
  --line-soft:  rgba(26, 23, 20, 0.08);
  --accent:     #c8431e;
  --accent-ink: #a8350f;

  --serif: "Instrument Serif", Georgia, "Times New Roman", serif;
  --sans:  "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
  --mono:  ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;

  --container: 1080px;
  --pad: clamp(1.25rem, 5vw, 2.5rem);
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---------- reset ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
  font-family: var(--sans);
  background: var(--paper);
  color: var(--ink);
  line-height: 1.6;
  font-size: 1.0625rem;
  -webkit-font-smoothing: antialiased;
  text-rendering: optimizeLegibility;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

::selection { background: var(--accent); color: var(--paper); }

.container { width: 100%; max-width: var(--container); margin-inline: auto; padding-inline: var(--pad); }

.skip-link {
  position: absolute; left: -999px; top: 0; z-index: 100;
  background: var(--ink); color: var(--paper); padding: .6rem 1rem; border-radius: 0 0 6px 0;
}
.skip-link:focus { left: 0; }

:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 2px; }

/* ---------- header ---------- */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--paper) 80%, transparent);
  backdrop-filter: saturate(140%) blur(10px);
  -webkit-backdrop-filter: saturate(140%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color .3s var(--ease), background .3s var(--ease);
}
.site-header.scrolled { border-bottom-color: var(--line); }

.header-inner {
  display: flex; align-items: center; gap: 1.5rem;
  height: 68px;
}
.wordmark {
  font-family: var(--serif); font-size: 1.4rem; letter-spacing: .01em;
  margin-right: auto;
}
.wordmark-dot { color: var(--accent); }

.nav { display: flex; gap: 1.75rem; }
.nav a {
  font-size: .9rem; color: var(--ink-soft); position: relative; padding: .25rem 0;
  transition: color .2s var(--ease);
}
.nav a::after {
  content: ""; position: absolute; left: 0; bottom: -2px; height: 1px; width: 0;
  background: var(--accent); transition: width .25s var(--ease);
}
.nav a:hover { color: var(--ink); }
.nav a:hover::after { width: 100%; }

/* ---------- buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: .4rem;
  font-family: var(--sans); font-size: .95rem; font-weight: 500;
  padding: .8rem 1.4rem; border-radius: 999px; cursor: pointer;
  border: 1px solid transparent; transition: transform .15s var(--ease), background .2s var(--ease), color .2s var(--ease), border-color .2s var(--ease);
}
.btn-sm { padding: .5rem 1rem; font-size: .85rem; }
.btn-primary { background: var(--ink); color: var(--paper); }
.btn-primary:hover { background: var(--accent); transform: translateY(-2px); }
.btn-ghost { border-color: var(--line); color: var(--ink); background: transparent; }
.btn-ghost:hover { border-color: var(--ink); transform: translateY(-2px); }
.nav-cta { background: var(--ink); color: var(--paper); }
.nav-cta:hover { background: var(--accent); }

/* ---------- mobile nav ---------- */
.menu-toggle {
  display: none; flex-direction: column; gap: 5px; background: none; border: none;
  cursor: pointer; padding: .4rem;
}
.menu-toggle span { width: 22px; height: 2px; background: var(--ink); transition: transform .25s var(--ease), opacity .25s var(--ease); }
.menu-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.menu-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.menu-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.mobile-nav {
  display: none; flex-direction: column;
  border-top: 1px solid var(--line); background: var(--paper);
}
.mobile-nav a { padding: 1rem var(--pad); border-bottom: 1px solid var(--line-soft); font-size: 1.05rem; }
.mobile-nav.open { display: flex; }

/* ---------- hero ---------- */
.hero { padding: clamp(4rem, 12vw, 8.5rem) 0 clamp(3.5rem, 9vw, 6rem); }
.eyebrow {
  font-family: var(--mono); font-size: .8rem; letter-spacing: .12em; text-transform: uppercase;
  color: var(--accent); margin-bottom: 1.5rem;
}
.hero-title {
  font-family: var(--serif); font-weight: 400;
  font-size: clamp(2.7rem, 8vw, 5.6rem); line-height: 1.02; letter-spacing: -0.01em;
  max-width: 16ch; margin-bottom: 1.6rem;
}
.hero-title em { font-style: italic; color: var(--accent); }
.lede {
  font-size: clamp(1.15rem, 2.5vw, 1.5rem); color: var(--ink-soft);
  max-width: 40ch; margin-bottom: 2.4rem; font-weight: 400;
}
.cta-row { display: flex; flex-wrap: wrap; gap: .9rem; margin-bottom: 3rem; }

.hero-meta {
  display: flex; align-items: center; flex-wrap: wrap; gap: .8rem;
  font-family: var(--mono); font-size: .82rem; color: var(--muted);
  padding-top: 1.6rem; border-top: 1px solid var(--line);
}
.hero-meta-sep { color: var(--line); }
.status { display: inline-flex; align-items: center; gap: .5rem; color: var(--ink-soft); }
.status-dot {
  width: 8px; height: 8px; border-radius: 50%; background: #2e9e5b;
  box-shadow: 0 0 0 0 rgba(46, 158, 91, .5); animation: pulse 2.4s infinite;
}
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(46,158,91,.45); }
  70%  { box-shadow: 0 0 0 7px rgba(46,158,91,0); }
  100% { box-shadow: 0 0 0 0 rgba(46,158,91,0); }
}

/* ---------- sections ---------- */
.section { padding: clamp(3.5rem, 9vw, 6.5rem) 0; }
.section-alt { background: var(--paper-2); }
.section-head { display: flex; align-items: baseline; gap: 1rem; margin-bottom: 2.8rem; }
.section-num { font-family: var(--mono); font-size: .82rem; color: var(--accent); padding-top: .3rem; }
.section-title {
  font-family: var(--serif); font-weight: 400; letter-spacing: -0.01em;
  font-size: clamp(1.9rem, 4.5vw, 3rem); line-height: 1.08; max-width: 22ch;
}
.section-intro { font-size: 1.2rem; color: var(--ink-soft); margin: -1.4rem 0 2.6rem; max-width: 50ch; }

/* ---------- pillars ---------- */
.pillars { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.pillar { background: var(--paper); padding: 2.2rem 1.8rem; transition: background .25s var(--ease); }
.section-alt .pillar { background: var(--paper-2); }
.pillar:hover { background: var(--paper-2); }
.section-alt .pillar:hover { background: var(--paper); }
.pillar-num { font-family: var(--mono); font-size: .8rem; color: var(--accent); }
.pillar h3 { font-family: var(--serif); font-weight: 400; font-size: 1.55rem; margin: .7rem 0 .6rem; }
.pillar p { color: var(--ink-soft); font-size: .98rem; }

/* ---------- split layout (approach / about) ---------- */
.split { display: grid; grid-template-columns: 1fr 1.6fr; gap: clamp(2rem, 6vw, 5rem); }
.split-aside { margin-bottom: 0; flex-direction: column; align-items: flex-start; gap: 1rem; position: sticky; top: 100px; align-self: start; }
.prose { color: var(--ink-soft); font-size: 1.08rem; margin-bottom: 1.3rem; max-width: 60ch; }
.prose.lead { color: var(--ink); font-size: 1.3rem; line-height: 1.5; }
.prose.pull {
  font-family: var(--serif); font-size: 1.6rem; line-height: 1.3; color: var(--ink);
  border-left: 2px solid var(--accent); padding-left: 1.4rem; margin-top: 2rem; max-width: 30ch;
}
.question-list { list-style: none; margin: 1.6rem 0; border-top: 1px solid var(--line); }
.question-list li {
  font-family: var(--serif); font-size: 1.5rem; padding: 1rem 0; border-bottom: 1px solid var(--line);
  display: flex; align-items: baseline; gap: 1rem;
}
.question-list li::before { content: "→"; color: var(--accent); font-family: var(--sans); font-size: 1rem; }
.about-actions { margin-top: 2rem; }

/* ---------- focus grid ---------- */
.focus-grid { list-style: none; display: grid; grid-template-columns: repeat(2, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); }
.focus-item { background: var(--paper); padding: 1.7rem 1.6rem; font-size: 1.15rem; transition: color .2s var(--ease), background .2s var(--ease); position: relative; }
.focus-item:last-child:nth-child(odd) { grid-column: 1 / -1; }
.focus-item span { display: inline-block; max-width: 26ch; }
.focus-item::after { content: "↗"; position: absolute; top: 1.5rem; right: 1.5rem; color: var(--line); transition: color .2s var(--ease), transform .2s var(--ease); }
.focus-item:hover { background: var(--paper-2); }
.focus-item:hover::after { color: var(--accent); transform: translate(2px, -2px); }

/* ---------- contact ---------- */
.section-contact { background: var(--ink); color: var(--paper); }
.section-contact .section-num { color: #ff8a66; }
.section-contact .section-title { color: var(--paper); }
.contact-grid { display: grid; grid-template-columns: 1fr 1fr; gap: clamp(2rem, 6vw, 4.5rem); align-items: start; }
.section-contact .prose { color: rgba(247,244,239,.72); }
.email-link {
  display: inline-block; font-family: var(--serif); font-size: clamp(1.6rem, 4vw, 2.4rem);
  color: var(--paper); border-bottom: 1px solid rgba(247,244,239,.3); padding-bottom: .2rem; margin: .6rem 0 2rem;
  transition: color .2s var(--ease), border-color .2s var(--ease);
}
.email-link:hover { color: #ff8a66; border-color: #ff8a66; }
.social { list-style: none; display: flex; gap: 1.5rem; font-family: var(--mono); font-size: .85rem; }
.social a { color: rgba(247,244,239,.7); border-bottom: 1px solid transparent; padding-bottom: 2px; }
.social a:hover { color: var(--paper); border-color: #ff8a66; }

.contact-form { display: grid; gap: 1.1rem; }
.field { display: grid; gap: .45rem; }
.field label { font-family: var(--mono); font-size: .78rem; letter-spacing: .05em; text-transform: uppercase; color: rgba(247,244,239,.6); }
.field input, .field textarea {
  font-family: var(--sans); font-size: 1rem; color: var(--paper);
  background: rgba(247,244,239,.05); border: 1px solid rgba(247,244,239,.18);
  border-radius: 8px; padding: .8rem .9rem; resize: vertical; transition: border-color .2s var(--ease), background .2s var(--ease);
}
.field input:focus, .field textarea:focus { outline: none; border-color: #ff8a66; background: rgba(247,244,239,.08); }
.contact-form .btn-primary { background: var(--paper); color: var(--ink); justify-self: start; }
.contact-form .btn-primary:hover { background: var(--accent); color: var(--paper); }
.form-note { font-family: var(--mono); font-size: .82rem; color: #ff8a66; min-height: 1.2em; }

/* ---------- footer ---------- */
.site-footer { background: var(--ink); color: rgba(247,244,239,.6); padding: 1.6rem 0; border-top: 1px solid rgba(247,244,239,.1); }
.footer-inner { display: flex; flex-wrap: wrap; align-items: center; gap: .6rem 1.5rem; font-family: var(--mono); font-size: .8rem; }
.footer-mark { color: var(--paper); }
.footer-tag { margin-right: auto; }
.footer-link { color: rgba(247,244,239,.6); border-bottom: 1px solid transparent; padding-bottom: 1px; transition: color .2s var(--ease), border-color .2s var(--ease); }
.footer-link:hover { color: var(--paper); border-color: #ff8a66; }

/* ---------- legal pages (privacy) ---------- */
.legal { padding: clamp(3rem, 8vw, 5.5rem) 0 clamp(3rem, 8vw, 5rem); }
.legal .container { max-width: 760px; }
.legal h1 { font-family: var(--serif); font-weight: 400; font-size: clamp(2.2rem, 6vw, 3.4rem); line-height: 1.06; letter-spacing: -0.01em; margin-bottom: .6rem; }
.legal .updated { font-family: var(--mono); font-size: .8rem; color: var(--muted); margin-bottom: 2.6rem; }
.legal h2 { font-family: var(--serif); font-weight: 400; font-size: clamp(1.4rem, 3.5vw, 1.9rem); margin: 2.6rem 0 .8rem; display: flex; align-items: baseline; gap: .7rem; }
.legal h2 .legal-num { font-family: var(--mono); font-size: .8rem; color: var(--accent); }
.legal h3 { font-size: 1rem; font-weight: 600; margin: 1.4rem 0 .4rem; }
.legal p { color: var(--ink-soft); margin-bottom: 1rem; }
.legal ul { color: var(--ink-soft); margin: 0 0 1rem 1.2rem; padding: 0; }
.legal li { margin-bottom: .45rem; }
.legal a { color: var(--accent); border-bottom: 1px solid var(--line); padding-bottom: 1px; }
.legal a:hover { border-color: var(--accent); }
.legal .disclaimer { font-size: .9rem; color: var(--muted); border-top: 1px solid var(--line); padding-top: 1.4rem; margin-top: 2.8rem; }
.legal .back { display: inline-block; margin-top: 1.6rem; font-family: var(--mono); font-size: .85rem; }

/* ---------- reveal animation ---------- */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity .7s var(--ease), transform .7s var(--ease); }
.reveal.in { opacity: 1; transform: none; }

/* ---------- responsive ---------- */
@media (max-width: 820px) {
  .nav, .nav-cta { display: none; }
  .menu-toggle { display: flex; }
  .split { grid-template-columns: 1fr; }
  .split-aside { position: static; }
  .pillars { grid-template-columns: 1fr; }
  .focus-grid { grid-template-columns: 1fr; }
  .focus-item:last-child:nth-child(odd) { grid-column: auto; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .reveal { opacity: 1; transform: none; transition: none; }
  .status-dot { animation: none; }
}