/* ============================================================
   Ali Seena Ahmadi — Portfolio (Light / "blueprint" theme)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=IBM+Plex+Mono:wght@400;500;600;700&family=Inter:wght@400;500;600&display=swap&display=swap');

:root{
  --bg: #FFFFFF;
  --bg-alt: #F4F6F9;
  --bg-panel: #FFFFFF;
  --border: #DDE3EC;
  --border-soft: #E9ECF2;
  --text: #10182B;
  --text-dim: #58627A;
  --text-faint: #99A2B5;
  --accent: #0E9F6E;
  --accent-dim: #0B7F58;
  --accent-2: #2557E0;
  --warn: #C2760C;
  --mono: 'IBM Plex Mono', 'Courier New', monospace;
  --sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --max-w: 1120px;
  --radius: 3px;
}

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

html{ scroll-behavior: smooth; }

body{
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--sans);
  font-size: 16px;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

/* Blueprint grid backdrop */
body::before{
  content: "";
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(rgba(37,87,224,0.07) 1px, transparent 1px),
    linear-gradient(90deg, rgba(37,87,224,0.07) 1px, transparent 1px);
  background-size: 64px 64px;
  opacity: 0.6;
  mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, black 30%, transparent 78%);
  -webkit-mask-image: radial-gradient(ellipse 90% 70% at 50% 0%, black 30%, transparent 78%);
}

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

.wrap{
  max-width: var(--max-w);
  margin: 0 auto;
  padding: 0 28px;
  position: relative;
  z-index: 1;
}

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

/* ---------- Skip link (accessibility) ---------- */
.skip-link{
  position: absolute;
  left: -9999px;
  top: 0;
  background: var(--accent-2);
  color: #fff;
  font-family: var(--mono);
  font-size: 13px;
  padding: 10px 18px;
  z-index: 200;
  border-radius: 0 0 6px 0;
}
.skip-link:focus{ left: 0; }

/* ---------- Focus ---------- */
:focus-visible{
  outline: 2px solid var(--accent-2);
  outline-offset: 3px;
}

/* ---------- Nav ---------- */
.site-nav{
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.88);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--border-soft);
}
.site-nav .wrap{
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 18px;
  padding-bottom: 18px;
}
.brand{
  font-family: var(--mono);
  font-size: 15px;
  font-weight: 600;
  letter-spacing: 0.02em;
  color: var(--text);
  display: flex;
  align-items: center;
  gap: 8px;
}
.brand .dot{
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(14,159,110,0.15);
  flex-shrink: 0;
}
.nav-links{
  display: flex;
  gap: 32px;
  list-style: none;
  margin: 0; padding: 0;
  font-family: var(--mono);
  font-size: 13px;
}
.nav-links a{
  color: var(--text-dim);
  transition: color .15s ease;
  position: relative;
  padding: 4px 0;
}
.nav-links a:hover,
.nav-links a.active{ color: var(--text); }
.nav-links a.active::after{
  content: "";
  position: absolute;
  left: 0; right: 0; bottom: -3px;
  height: 2px;
  background: var(--accent);
}
.nav-toggle{ display: none; }

@media (max-width: 720px){
  .nav-links{
    position: fixed;
    top: 61px;
    left: 0;
    right: 0;
    background: #ffffff;
    flex-direction: column;
    gap: 0;
    padding: 0 0 8px;
    border-bottom: 2px solid var(--border);
    box-shadow: 0 8px 24px rgba(16,24,43,0.12);
    transform: translateY(-6px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s ease, transform .2s ease;
    z-index: 49;
  }
  .nav-links.open{
    opacity: 1;
    transform: translateY(0);
    pointer-events: auto;
  }
  .nav-links li{
    border-top: 1px solid var(--border-soft);
  }
  .nav-links a{
    display: block;
    padding: 16px 28px;
    font-size: 15px;
    font-weight: 600;
    color: var(--text);
    letter-spacing: 0.02em;
  }
  .nav-links a:hover,
  .nav-links a.active{
    color: var(--accent);
    background: var(--bg-alt);
  }
  .nav-links a.active::after{ display: none; }
  .nav-toggle{
    display: block;
    background: none;
    border: 1px solid var(--border);
    color: var(--text);
    font-family: var(--mono);
    font-size: 12px;
    padding: 7px 10px;
    border-radius: var(--radius);
    cursor: pointer;
  }
}

/* ---------- Section basics ---------- */
section{ position: relative; z-index: 1; }

.eyebrow{
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--accent-dim);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 14px;
}
.eyebrow::before{
  content: "";
  width: 22px; height: 1px;
  background: var(--accent-dim);
}

h1, h2, h3, h4{
  font-family: var(--mono);
  font-weight: 600;
  color: var(--text);
  line-height: 1.25;
  margin: 0 0 16px;
  letter-spacing: -0.01em;
}
h1{ font-size: clamp(28px, 5vw, 52px); }
h2{ font-size: clamp(22px, 3.4vw, 32px); }
h3{ font-size: clamp(16px, 2vw, 18px); }
p{ color: var(--text-dim); margin: 0 0 16px; }
.lede{ font-size: clamp(16px, 1.8vw, 18px); color: var(--text-dim); max-width: 60ch; }

/* ---------- Buttons ---------- */
.btn-row{ display: flex; gap: 14px; flex-wrap: wrap; margin-top: 28px; }
.btn{
  font-family: var(--mono);
  font-size: 13.5px;
  padding: 12px 22px;
  border-radius: var(--radius);
  border: 1px solid var(--border);
  transition: all .15s ease;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  cursor: pointer;
}
.btn-primary{
  background: var(--text);
  color: #FFFFFF;
  border-color: var(--text);
  font-weight: 600;
}
.btn-primary:hover{ background: var(--accent-dim); border-color: var(--accent-dim); transform: translateY(-1px); }
.btn-ghost{ color: var(--text); background: transparent; }
.btn-ghost:hover{ border-color: var(--accent-2); color: var(--accent-2); }

/* ---------- Status pills ---------- */
.pill-row{ display: flex; flex-wrap: wrap; gap: 10px; margin: 22px 0; }
.pill{
  font-family: var(--mono);
  font-size: 12px;
  padding: 6px 12px;
  border-radius: 999px;
  border: 1px solid var(--border);
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--text-dim);
  background: var(--bg-alt);
}
.pill .led{ width: 6px; height: 6px; border-radius: 50%; flex-shrink: 0; }
.pill.up .led{ background: var(--accent); box-shadow: 0 0 0 3px rgba(14,159,110,0.18); }
.pill.up{ color: var(--text); border-color: rgba(14,159,110,0.35); }
.pill.prog .led{ background: var(--warn); box-shadow: 0 0 0 3px rgba(194,118,12,0.18); }
.pill.prog{ border-color: rgba(194,118,12,0.3); }

/* ---------- Hero ---------- */
.hero{ padding: 76px 0 60px; }
.hero-grid{
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 56px;
  align-items: start;
}
@media (max-width: 880px){
  .hero-grid{ grid-template-columns: 1fr; }
}

/* Terminal card */
.terminal{
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
  box-shadow: 0 20px 40px -24px rgba(16,24,43,0.18);
}
.terminal-bar{
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 11px 14px;
  background: var(--bg-alt);
  border-bottom: 1px solid var(--border-soft);
}
.terminal-bar span:not(.title){ width: 10px; height: 10px; border-radius: 50%; background: var(--border); }
.terminal-bar .title{
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text-faint);
  margin-left: 6px;
}
.terminal-body{
  padding: 22px 20px 26px;
  font-family: var(--mono);
  font-size: 14px;
}
.terminal-body .line{ margin-bottom: 6px; color: var(--text-dim); }
.terminal-body .prompt{ color: var(--accent-dim); font-weight: 600; }
.terminal-body .out{ color: var(--text); }
.terminal-body .comment{ color: var(--text-faint); }
.caret{
  display: inline-block;
  width: 8px; height: 15px;
  background: var(--accent);
  margin-left: 2px;
  vertical-align: -2px;
  animation: blink 1s steps(1) infinite;
}
@keyframes blink{ 50%{ opacity: 0; } }

/* Traceroute panel */
.trace{
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 20px 20px 22px;
  box-shadow: 0 20px 40px -28px rgba(16,24,43,0.14);
}
.trace-head{
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 16px;
  display: flex;
  justify-content: space-between;
}
.hop{
  display: grid;
  grid-template-columns: 22px 1fr;
  gap: 12px;
  position: relative;
  padding-bottom: 20px;
}
.hop:last-child{ padding-bottom: 0; }
.hop-line{
  position: absolute;
  left: 10px; top: 20px; bottom: -2px;
  width: 1px;
  background: var(--border);
}
.hop:last-child .hop-line{ display: none; }
.hop-node{
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent-2);
  margin-top: 5px;
  box-shadow: 0 0 0 3px rgba(37,87,224,0.14);
}
.hop:last-child .hop-node{
  background: var(--accent);
  box-shadow: 0 0 0 3px rgba(14,159,110,0.16);
}
.hop-host{
  font-family: var(--mono);
  font-size: 13.5px;
  color: var(--text);
}
.hop-desc{ font-size: 12.5px; color: var(--text-dim); margin-top: 2px; }
.hop-ms{ font-family: var(--mono); font-size: 11px; color: var(--text-faint); }

/* ---------- Cards / grids ---------- */
.grid-3{ display: grid; grid-template-columns: repeat(3, 1fr); gap: 22px; }
.grid-2{ display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; }

@media (max-width: 880px){
  .grid-3{ grid-template-columns: 1fr; }
  .grid-2{ grid-template-columns: 1fr; }
}

.card{
  background: var(--bg-panel);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 26px;
  transition: border-color .15s ease, transform .15s ease, box-shadow .15s ease;
}
.card:hover{
  border-color: var(--accent-2);
  transform: translateY(-2px);
  box-shadow: 0 16px 32px -22px rgba(16,24,43,0.22);
}

/* Tag chips */
.tags{ display: flex; flex-wrap: wrap; gap: 8px; margin: 14px 0 0; }
.tag{
  font-family: var(--mono);
  font-size: 11px;
  color: var(--accent-2);
  background: rgba(37,87,224,0.06);
  border: 1px solid rgba(37,87,224,0.22);
  padding: 4px 9px;
  border-radius: 4px;
}

/* ---------- Project repo link (projects page) ---------- */
.project-repo{
  display: flex;
  align-items: baseline;
  gap: 12px;
  margin: 14px 0 4px;
  padding: 10px 0;
  border-top: 1px solid var(--border-soft);
}
.project-repo-label{
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  flex-shrink: 0;
}
.project-repo-link{
  font-family: var(--mono);
  font-size: 13px;
  color: var(--accent-2);
  text-decoration: none;
  transition: color .15s ease;
}
.project-repo-link:hover{
  color: var(--accent-dim);
  text-decoration: underline;
}

/* ---------- Section spacing ---------- */
.section{ padding: 72px 0; border-top: 1px solid var(--border-soft); }
.section-head{ max-width: 640px; margin-bottom: 40px; }

/* ---------- Footer ---------- */
footer{
  border-top: 1px solid var(--border-soft);
  padding: 34px 0;
  margin-top: 40px;
  position: relative;
  z-index: 1;
}
footer .wrap{
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 14px;
}
footer p{ margin: 0; font-family: var(--mono); font-size: 12px; color: var(--text-faint); }
.foot-links{ display: flex; gap: 20px; list-style: none; margin: 0; padding: 0; font-family: var(--mono); font-size: 12px; }
.foot-links a{ color: var(--text-dim); }
.foot-links a:hover{ color: var(--accent-dim); }
.foot-stack{
  font-family: var(--mono);
  font-size: 11px;
  color: var(--text-faint);
  margin: 0;
  letter-spacing: 0.03em;
}
.foot-stack span{
  color: var(--accent);
  font-weight: 600;
  text-shadow: 0 0 8px rgba(14,159,110,0.4);
}

/* ---------- Page hero ---------- */
.page-hero{ padding: 64px 0 20px; }

/* ---------- Timeline ---------- */
.timeline{ display: flex; flex-direction: column; gap: 0; }
.tl-item{
  display: grid;
  grid-template-columns: 150px 1fr;
  gap: 24px;
  padding: 26px 0;
  border-bottom: 1px solid var(--border-soft);
}
.tl-item:last-child{ border-bottom: none; }
.tl-date{
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--accent-dim);
  padding-top: 2px;
}
.tl-item ul{ margin: 10px 0 0; padding-left: 18px; color: var(--text-dim); }
.tl-item li{ margin-bottom: 6px; font-size: 14.5px; }

/* ---------- Skills ---------- */
.skill-group h4{
  font-family: var(--mono);
  font-size: 12.5px;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: 14px;
}
.skill-list{ list-style: none; margin: 0 0 30px; padding: 0; display: flex; flex-direction: column; gap: 10px; }
.skill-list li{
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 14.5px;
  color: var(--text);
  font-family: var(--mono);
}
.skill-list li::before{
  content: "";
  width: 5px; height: 5px;
  background: var(--accent-2);
  flex-shrink: 0;
}

/* ---------- Contact page ---------- */
.contact-grid{ display: grid; grid-template-columns: 1fr 1fr; gap: 50px; }
.field-list{ display: flex; flex-direction: column; gap: 22px; }
.field{
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg-panel);
}
.field .k{ font-family: var(--mono); font-size: 11px; color: var(--text-faint); text-transform: uppercase; letter-spacing: 0.06em; }
.field .v{ font-family: var(--mono); font-size: 15px; color: var(--text); }
.field .v a:hover{ color: var(--accent-dim); }

form.contact-form{ display: flex; flex-direction: column; gap: 16px; }
.contact-form label{
  font-family: var(--mono);
  font-size: 11.5px;
  color: var(--text-faint);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 6px;
  display: block;
}
.contact-form input,
.contact-form textarea{
  width: 100%;
  background: var(--bg-alt);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  color: var(--text);
  font-family: var(--sans);
  font-size: 14.5px;
  padding: 12px 14px;
  resize: vertical;
}
.contact-form input:focus,
.contact-form textarea:focus{
  outline: none;
  border-color: var(--accent-2);
  background: var(--bg);
}
.contact-form textarea{ min-height: 130px; }

/* ---------- Responsive: 768px ---------- */
@media (max-width: 768px){
  .wrap{ padding: 0 20px; }
  .hero{ padding: 50px 0 40px; }
  .section{ padding: 52px 0; }
  .page-hero{ padding: 48px 0 16px; }
  .contact-grid{ grid-template-columns: 1fr; gap: 36px; }
  .tl-item{ grid-template-columns: 100px 1fr; gap: 16px; }
  footer .wrap{ flex-direction: column; align-items: flex-start; gap: 10px; }
}

/* ---------- Responsive: 480px ---------- */
@media (max-width: 480px){
  .wrap{ padding: 0 16px; }
  .hero{ padding: 36px 0 32px; }
  .section{ padding: 40px 0; }
  .tl-item{ grid-template-columns: 1fr; gap: 6px; }
  .tl-date{ padding-top: 0; }
  .btn-row{ flex-direction: column; }
  .btn{ justify-content: center; }
  .grid-3, .grid-2{ grid-template-columns: 1fr; gap: 16px; }
  .card{ padding: 20px 18px; }
  .pill-row{ gap: 8px; }
  .pill{ font-size: 11px; padding: 5px 10px; }
  .trace{ padding: 16px; }
  .terminal-body{ font-size: 12.5px; padding: 16px; }
}

/* ---------- Responsive: 360px ---------- */
@media (max-width: 360px){
  h1{ font-size: 26px; }
  .brand{ font-size: 13px; }
  .card{ padding: 16px 14px; }
}

/* ---------- Reduced motion ---------- */
@media (prefers-reduced-motion: reduce){
  *, *::before, *::after{
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

/* ---------- Screen-reader only utility ---------- */
.sr-only{
  position: absolute;
  width: 1px; height: 1px;
  padding: 0; margin: -1px;
  overflow: hidden;
  clip: rect(0,0,0,0);
  white-space: nowrap;
  border: 0;
}