/* ═══════════════════════════════════════════════
   SAMAN NASERI BOROUJENI — PORTFOLIO
   PALETTE — IMPERIAL BLUE
   #003E74 · #1F70B8 · #A8C8E8 · #F2F5F8
   Drop this file in as css/style.css to apply the theme.
═══════════════════════════════════════════════ */

/* ── Tokens ─────────────────────────────────── */
:root {
  --dark:      #003E74;
  --dark2:     #00325E;
  --dark3:     #002648;
  --mid:       #1F70B8;
  --light:     #A8C8E8;
  --bg:        #F2F5F8;
  --bg2:       #E4EAF0;
  --bg3:       #D0DAE4;
  --text:      #003E74;
  --muted:     #2A5580;
  --rule:      #74899d;
  --btn-text:  #F2F5F8;

  /* Legacy Archive aliases (kept for compatibility) */
  --forest:    #003E74;
  --forest2:   #00325E;
  --forest3:   #002648;
  --gold:      #A8C8E8;
  --gold-dk:   #1F70B8;
  --gold-lt:   #A8C8E8;
  --ivory:     #F2F5F8;
  --cream:     #E4EAF0;
  --parchment: #D0DAE4;
  --ink:       #003E74;
  --muted:     #2A5580;
  --rule:      #74899d;
  --serif:     'EB Garamond', Georgia, serif;
  --display:   'Cormorant Garamond', Georgia, serif;
  --mono:      'DM Mono', 'Courier New', monospace;
}

/* ── Reset ──────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 18px; }
body {
  font-family: var(--serif);
  background: var(--bg);
  color: var(--text);
  font-size: 1rem;
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}
::selection { background: var(--dark); color: var(--bg); }
::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: var(--bg2); }
::-webkit-scrollbar-thumb { background: var(--mid); border-radius: 3px; }
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }

/* ── Progress bar ───────────────────────────── */
#progress {
  position: fixed; top: 0; left: 0; height: 2px; width: 0%; z-index: 200;
  background: linear-gradient(90deg, var(--mid), var(--light));
  transition: width 0.1s linear;
}

/* ── Navigation ─────────────────────────────── */
nav {
  position: fixed; top: 2px; left: 0; right: 0; z-index: 100;
  background: var(--dark);
  display: flex; align-items: center; justify-content: space-between;
  padding: 0 2rem; height: 58px;
  border-bottom: 2px solid var(--mid);
}
.nav-logo {
  font-family: var(--display); font-size: 1rem; font-weight: 300;
  letter-spacing: 0.13em; text-transform: uppercase; color: var(--bg);
  transition: color 0.2s;
}
.nav-logo:hover { color: var(--light); }
.nav-links { display: flex; gap: 0; list-style: none; }
.nav-links a {
  font-family: var(--mono); font-size: 0.68rem; letter-spacing: 0.15em; font-weight: 500;
  text-transform: uppercase; color: rgba(255,255,255,0.72);
  padding: 0 1.2rem; height: 58px; display: flex; align-items: center;
  border-left: 1px solid rgba(255,255,255,0.07);
  transition: color 0.2s, background 0.2s;
}
.nav-links a:hover, .nav-links a.active {
  color: var(--light); background: rgba(255,255,255,0.06);
}
.nav-burger {
  display: none; flex-direction: column; gap: 5px; cursor: pointer; padding: 4px;
}
.nav-burger span {
  display: block; width: 22px; height: 1.5px; background: var(--bg); transition: all 0.3s;
}

/* ── Page header (inner pages) ──────────────── */
.page-header {
  background: var(--dark); padding: 8rem 0 4rem;
  position: relative; overflow: hidden;
}
.page-header::before {
  content: ''; position: absolute; inset: 0;
  background-image:
    linear-gradient(rgba(255,255,255,0.04) 1px,transparent 1px),
    linear-gradient(90deg,rgba(255,255,255,0.04) 1px,transparent 1px);
  background-size: 72px 72px; pointer-events: none;
}
.page-header-inner { max-width: 1200px; margin: 0 auto; padding: 0 2rem; position: relative; z-index: 1; }
.page-header-eyebrow {
  font-family: var(--mono); font-size: 0.6rem; letter-spacing: 0.26em;
  text-transform: uppercase; color: var(--light); margin-bottom: 1.2rem;
  display: flex; align-items: center; gap: 1rem;
}
.page-header-eyebrow::before { content: ''; width: 36px; height: 1px; background: var(--light); opacity: 0.6; }
.page-header h1 {
  font-family: var(--display); font-weight: 300;
  font-size: clamp(2.5rem, 5vw, 4rem); line-height: 1; color: var(--bg); letter-spacing: -0.01em;
}
.page-header h1 em { font-style: italic; color: var(--light); }
.page-header-rule { width: 56px; height: 2px; background: linear-gradient(90deg, var(--mid), var(--light)); margin: 1.5rem 0; }
.page-header-sub {
  font-family: var(--display); font-size: 1.1rem; font-style: italic;
  font-weight: 300; color: rgba(255,255,255,0.45);
}

/* ── Layout ─────────────────────────────────── */
.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }
.section { padding: 5rem 0; }
.section-sm { padding: 3rem 0; }

/* ── Section heading ────────────────────────── */
.sec-head { display: flex; align-items: baseline; gap: 1.4rem; margin-bottom: 3rem; }
.sec-num {
  font-family: var(--mono); font-size: 0.58rem; letter-spacing: 0.18em;
  color: var(--mid); text-transform: uppercase; padding-top: 0.25em;
}
.sec-title {
  font-family: var(--display); font-size: clamp(1.8rem, 3.5vw, 2.5rem);
  font-weight: 300; color: var(--dark); line-height: 1.05;
}
.sec-rule { flex: 1; height: 1px; background: linear-gradient(90deg, var(--rule), transparent); margin-bottom: 0.35rem; }

/* ── Buttons ────────────────────────────────── */
.btn-primary {
  display: inline-flex; align-items: center; gap: 0.8rem;
  font-family: var(--mono); font-size: 0.64rem; letter-spacing: 0.18em;
  text-transform: uppercase; color: var(--btn-text); background: var(--mid);
  padding: 0.9rem 2.2rem; transition: background 0.25s, transform 0.2s;
  border: none; cursor: pointer;
}
.btn-primary:hover { background: var(--dark); transform: translateY(-2px); }
.btn-outline {
  display: inline-flex; align-items: center; gap: 0.8rem;
  font-family: var(--mono); font-size: 0.62rem; letter-spacing: 0.16em;
  text-transform: uppercase; color: var(--dark);
  border: 1px solid rgba(0,0,0,0.2); padding: 0.8rem 2rem;
  transition: background 0.2s, color 0.2s;
}
.btn-outline:hover { background: var(--dark); color: var(--bg); }
.btn-ghost {
  font-family: var(--mono); font-size: 0.6rem; letter-spacing: 0.15em;
  text-transform: uppercase; color: var(--mid);
  border-bottom: 1px solid rgba(0,0,0,0.2); padding-bottom: 0.15rem;
  transition: color 0.2s, border-color 0.2s;
}
.btn-ghost:hover { color: var(--dark); border-color: var(--dark); }

/* ── Cards ──────────────────────────────────── */
.card {
  border: 1px solid var(--rule); padding: 2.2rem;
  background: var(--bg); transition: box-shadow 0.3s, transform 0.3s;
  position: relative; overflow: hidden;
}
.card::before {
  content: ''; position: absolute; bottom: 0; left: 0; right: 0; height: 2px;
  background: linear-gradient(90deg, var(--mid), var(--light));
  transform: scaleX(0); transform-origin: left; transition: transform 0.35s ease;
}
.card:hover { box-shadow: 0 6px 24px rgba(0,0,0,0.1); transform: translateY(-3px); }
.card:hover::before { transform: scaleX(1); }

/* ── Tags ───────────────────────────────────── */
.tags { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.tag {
  font-family: var(--mono); font-size: 0.58rem; letter-spacing: 0.1em;
  text-transform: uppercase; color: var(--dark);
  border: 1px solid rgba(0,0,0,0.22); padding: 0.26rem 0.75rem;
  transition: background 0.2s, color 0.2s; cursor: default;
}
.tag:hover { background: var(--dark); color: var(--bg); }

/* ── Dark section ───────────────────────────── */
.dark-section { background: var(--dark); }
.dark-section .sec-title { color: var(--bg); }
.dark-section .sec-rule { background: linear-gradient(90deg, rgba(255,255,255,0.2), transparent); }

/* ── Placeholder banner ─────────────────────── */
.placeholder-banner {
  background: rgba(0,0,0,0.04);
  border: 1px dashed rgba(0,0,0,0.2);
  padding: 3rem; text-align: center; margin: 2rem 0;
}
.placeholder-banner p {
  font-family: var(--mono); font-size: 0.65rem; letter-spacing: 0.14em;
  text-transform: uppercase; color: var(--mid); margin-bottom: 0.5rem;
}
.placeholder-banner small {
  font-family: var(--serif); font-size: 0.9rem; font-style: italic; color: var(--muted);
}

/* ── Breadcrumb ─────────────────────────────── */
.breadcrumb {
  font-family: var(--mono); font-size: 0.58rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: var(--muted);
  display: flex; align-items: center; gap: 0.6rem; margin-bottom: 1.5rem;
}
.breadcrumb a { color: var(--light); transition: color 0.2s; }
.breadcrumb a:hover { color: var(--bg); }
.breadcrumb::before { content: '→'; font-size: 0.7rem; color: rgba(255,255,255,0.3); }

/* ── Footer ─────────────────────────────────── */
footer {
  background: var(--dark3);
  border-top: 1px solid rgba(255,255,255,0.1);
  padding: 2.5rem 2rem;
  display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 1rem;
}
.foot-name {
  font-family: var(--display); font-size: 1rem; font-weight: 300;
  font-style: italic; color: rgba(255,255,255,0.7);
}
.foot-links { display: flex; gap: 2rem; }
.foot-links a {
  font-family: var(--mono); font-size: 0.56rem; letter-spacing: 0.12em;
  text-transform: uppercase; color: rgba(255,255,255,0.7); transition: color 0.2s;
}
.foot-links a:hover { color: var(--light); }
.foot-copy { font-family: var(--mono); font-size: 0.56rem; letter-spacing: 0.1em; color: rgba(255,255,255,0.15); }

/* ── Back to top ────────────────────────────── */
#btt {
  position: fixed; bottom: 2rem; right: 2rem; z-index: 50;
  width: 44px; height: 44px; background: var(--dark);
  border: 1px solid var(--mid); display: flex; align-items: center;
  justify-content: center; color: var(--light); font-size: 1rem;
  cursor: pointer; opacity: 0; transform: translateY(12px);
  transition: opacity 0.3s, transform 0.3s, background 0.2s;
}
#btt.show { opacity: 1; transform: translateY(0); }
#btt:hover { background: var(--mid); color: var(--bg); }

/* ── Reveal ─────────────────────────────────── */
.reveal {
  opacity: 0; transform: translateY(20px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-d1 { transition-delay: 0.08s; }
.reveal-d2 { transition-delay: 0.16s; }
.reveal-d3 { transition-delay: 0.24s; }

/* ── Skill bars ─────────────────────────────── */
.skill-bar { height: 2px; background: var(--bg3); position: relative; overflow: hidden; }
.skill-fill {
  position: absolute; top: 0; left: 0; height: 100%;
  background: var(--dark); width: 0;
  transition: width 1.2s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.skills-row.animated .skill-fill { width: var(--pct); }

/* ── Responsive ─────────────────────────────── */

/* Tablet & mobile: layout switches (burger, stacked nav, page header height) */
@media (max-width: 900px) {
  .nav-links {
    display: none; position: fixed; top: 60px; left: 0; right: 0;
    background: var(--dark); flex-direction: column;
    border-bottom: 2px solid var(--mid);
  }
  .nav-links.open { display: flex; }
  .nav-links a { height: auto; padding: 1rem 1.5rem; border-left: none; border-bottom: 1px solid rgba(255,255,255,0.05); }
  .nav-burger { display: flex; }
  .page-header { padding: 7rem 0 3rem; }
  footer { flex-direction: column; text-align: center; }
  .foot-links { justify-content: center; flex-wrap: wrap; gap: 1rem; }
}

/* Phone: reduce horizontal padding */
@media (max-width: 600px) {
  nav { padding: 0 1.5rem; }
  .container { padding: 0 1.5rem; }
  .page-header-inner { padding: 0 1.5rem; }
  footer { padding: 2rem 1.5rem; }
}

/* Small phone: tighten further */
@media (max-width: 480px) {
  html { font-size: 16px; }
  nav { padding: 0 1rem; }
  .container { padding: 0 1rem; }
  .page-header-inner { padding: 0 1rem; }
  footer { padding: 1.5rem 1rem; }
}