/* ============================================
   RAFAT KARIM PORTFOLIO — DESIGN SYSTEM
   Signature: a "landmark focus" motif — bracket
   markers [ ] echo screen-reader landmark regions,
   and a bold visible focus ring (real accessibility
   feature) is reused as the site's visual signature.
   ============================================ */

:root{
  --bg: #FFFFFF;
  --bg-soft: #F3F5FA;
  --ink: #12151C;
  --ink-muted: #545B6B;
  --ink-faint: #7A8092;
  --accent: #2F5AFF;
  --accent-ink: #1C3FCB;
  --highlight: #F6A623;
  --border: #E1E4EB;
  --border-strong: #C7CCDA;
  --focus: #2F5AFF;
  --radius: 14px;
  --font-display: 'Space Grotesk', 'Noto Sans Bengali', 'Segoe UI', sans-serif;
  --font-body: 'Inter', 'Noto Sans Bengali', 'Segoe UI', sans-serif;
  --font-mono: 'IBM Plex Mono', 'Noto Sans Bengali', 'Consolas', monospace;
  --max-width: 1180px;
}

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

html{
  scroll-behavior: smooth;
  scroll-padding-top: 132px; /* WCAG 2.2 SC 2.4.11: keep focused/linked content clear of the sticky header + welcome bar */
}
@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior: auto; }
  *, *::before, *::after{
    animation-duration: 0.001ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.001ms !important;
    scroll-behavior: auto !important;
  }
}

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

h1, h2, h3{
  font-family: var(--font-display);
  font-weight: 600;
  line-height: 1.15;
  margin: 0 0 0.5em;
  color: var(--ink);
}

h1{ font-size: clamp(2.25rem, 4.5vw, 3.4rem); font-weight: 700; }
h2{ font-size: clamp(1.7rem, 3vw, 2.35rem); }
h3{ font-size: 1.15rem; }

p{ margin: 0 0 1em; color: var(--ink-muted); }

a{ color: var(--accent-ink); }

img{ max-width: 100%; display: block; }

ul, ol{ margin: 0; padding: 0; list-style: none; }

/* ---------- Focus (accessibility + signature) ---------- */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible,
[tabindex]:focus-visible{
  outline: 3px solid var(--focus);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ---------- Skip link ---------- */
.skip-link{
  position: absolute;
  left: -999px;
  top: 0;
  background: var(--accent);
  color: #fff;
  padding: 14px 20px;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.9rem;
  z-index: 1000;
  border-radius: 0 0 8px 0;
}
.skip-link:focus{
  left: 0;
}

/* ---------- Eyebrow / bracket motif ---------- */
.eyebrow{
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  color: var(--accent-ink);
  margin-bottom: 0.9em;
}

/* ---------- Layout helpers ---------- */
.section{ padding: 88px 24px; scroll-margin-top: 132px; }
.section-soft{ background: var(--bg-soft); }
.section-inner{ max-width: var(--max-width); margin: 0 auto; }
.section-intro{ max-width: 62ch; font-size: 1.05rem; }

/* ============ WELCOME BAR (live date/time, Bangladesh time) ============ */
.welcome-bar{
  background: var(--ink);
  color: #E7E9F0;
}
.welcome-bar-inner{
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 8px 24px;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 4px 16px;
  font-family: var(--font-mono);
  font-size: 0.76rem;
}
.welcome-message{ margin: 0; color: #E7E9F0; }
.welcome-datetime{ margin: 0; color: #9FA8C7; white-space: nowrap; }

/* ============ HEADER ============ */
.site-header{
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
}
.header-inner{
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 16px 24px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.brand{
  display: flex;
  align-items: baseline;
  gap: 8px;
  text-decoration: none;
  font-family: var(--font-display);
  font-weight: 700;
  color: var(--ink);
  margin-right: auto;
}
.brand-mark{ font-family: var(--font-mono); color: var(--accent); font-size: 0.95rem; }
.brand-name{ font-size: 1.05rem; }

.nav-toggle{
  display: none;
  align-items: center;
  gap: 8px;
  background: none;
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 8px 12px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--ink);
  cursor: pointer;
}
.nav-toggle-box{
  width: 18px; height: 12px;
  position: relative;
  display: inline-block;
}
.nav-toggle-box span,
.nav-toggle-box::before,
.nav-toggle-box::after{
  content: "";
  position: absolute;
  left: 0; right: 0;
  height: 2px;
  background: var(--ink);
}
.nav-toggle-box::before{ top: 0; }
.nav-toggle-box span{ top: 5px; }
.nav-toggle-box::after{ top: 10px; }

.lang-toggle{
  background: none;
  border: 1px solid var(--border-strong);
  border-radius: 8px;
  padding: 8px 14px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ink);
  cursor: pointer;
  min-height: 24px;
}
.lang-toggle:hover{ background: var(--bg-soft); border-color: var(--accent); }
.lang-toggle[aria-pressed="true"]{ background: var(--accent); border-color: var(--accent); color: #fff; }

.primary-nav ul{
  display: flex;
  flex-wrap: wrap;
  gap: 4px 4px;
}
.primary-nav a{
  display: inline-block;
  padding: 8px 12px;
  font-size: 0.92rem;
  font-weight: 500;
  text-decoration: none;
  color: var(--ink-muted);
  border-radius: 8px;
}
.primary-nav a:hover{ color: var(--ink); background: var(--bg-soft); }
.primary-nav a.active-link,
.primary-nav a[aria-current="page"]{ color: var(--accent-ink); font-weight: 600; background: var(--bg-soft); }

@media (max-width: 880px){
  .nav-toggle{ display: inline-flex; }
  .primary-nav{
    position: absolute;
    top: 100%;
    left: 0; right: 0;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    display: none;
    padding: 12px 24px 20px;
  }
  .primary-nav.open{ display: block; }
  .primary-nav ul{ flex-direction: column; gap: 2px; }
  .primary-nav a{ display: block; padding: 12px 8px; }
}

/* ============ HERO ============ */
.hero{ padding: 72px 24px 96px; }
.hero-inner{
  max-width: var(--max-width);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 56px;
  align-items: center;
}
.hero-sub{
  font-family: var(--font-mono);
  font-size: 0.95rem;
  color: var(--accent-ink);
  margin-bottom: 1em;
}
.hero-lead{ font-size: 1.1rem; max-width: 56ch; }

.hero-actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin: 28px 0 36px;
}

.btn{
  display: inline-block;
  padding: 13px 24px;
  border-radius: 10px;
  font-weight: 600;
  font-size: 0.95rem;
  text-decoration: none;
  border: 1.5px solid transparent;
  cursor: pointer;
  font-family: var(--font-body);
}
.btn-primary{ background: var(--accent); color: #fff; }
.btn-primary:hover{ background: var(--accent-ink); }
.btn-secondary{ background: var(--ink); color: #fff; }
.btn-secondary:hover{ background: #2b2f3a; }
.btn-ghost{ background: transparent; color: var(--ink); border-color: var(--border-strong); }
.btn-ghost:hover{ background: var(--bg-soft); }

.hero-highlights{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
}
.hero-highlights li{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 7px 12px;
  border: 1px solid var(--border-strong);
  border-radius: 999px;
  color: var(--ink-muted);
}

.hero-visual{ display: flex; justify-content: center; }
.portrait-frame{
  position: relative;
  width: min(340px, 100%);
  padding: 18px;
}
.portrait-frame img{
  border-radius: 12px;
  width: 100%;
  height: auto;
  aspect-ratio: 1 / 1;
  object-fit: cover;
  border: 1px solid var(--border);
}
.corner{
  position: absolute;
  width: 28px; height: 28px;
  border: 3px solid var(--accent);
}
.corner-tl{ top: 0; left: 0; border-right: none; border-bottom: none; }
.corner-tr{ top: 0; right: 0; border-left: none; border-bottom: none; }
.corner-bl{ bottom: 0; left: 0; border-right: none; border-top: none; }
.corner-br{ bottom: 0; right: 0; border-left: none; border-top: none; }

@media (max-width: 880px){
  .hero-inner{ grid-template-columns: 1fr; }
  .hero-visual{ order: -1; }
  .portrait-frame{ width: 220px; }
}

/* ============ ABOUT ============ */
.about-grid{
  display: grid;
  grid-template-columns: 1.4fr 0.6fr;
  gap: 48px;
  align-items: start;
  margin-bottom: 56px;
}
.about-photo img{
  border-radius: var(--radius);
  border: 1px solid var(--border);
}
.value-list{
  display: flex;
  flex-wrap: wrap;
  gap: 10px;
  margin-top: 20px;
}
.value-list li{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  padding: 7px 12px;
  background: var(--bg-soft);
  border-radius: 8px;
  color: var(--ink);
}
@media (max-width: 780px){
  .about-grid{ grid-template-columns: 1fr; }
  .about-photo{ max-width: 220px; }
}

.journey-heading{ margin-top: 8px; }
.journey-intro{ max-width: 68ch; }
.journey-list{
  border-top: 1px solid var(--border);
  margin-top: 12px;
}
.journey-list li{
  display: grid;
  grid-template-columns: 110px 1fr;
  gap: 20px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
}
.journey-year{
  font-family: var(--font-mono);
  font-weight: 600;
  color: var(--accent-ink);
  font-size: 0.9rem;
}
.journey-text{ color: var(--ink); }
@media (max-width: 600px){
  .journey-list li{ grid-template-columns: 1fr; gap: 4px; }
}

/* ============ LEADERSHIP & INVOLVEMENT ============ */
.org-card{
  display: grid;
  grid-template-columns: 160px 1fr;
  gap: 32px;
  align-items: start;
  margin-bottom: 40px;
}
.org-logo{
  border-radius: 12px;
  border: 1px solid var(--border);
  width: 160px;
  height: 160px;
  object-fit: cover;
}
.org-card-text h3{ margin-bottom: 0.4em; }
.org-name{
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--accent-ink);
  margin-bottom: 14px;
}
.leadership-list{
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 12px;
}
.leadership-list li{
  position: relative;
  padding-left: 22px;
  font-size: 0.95rem;
  color: var(--ink-muted);
}
.leadership-list li::before{
  content: "";
  position: absolute;
  left: 0;
  top: 0.55em;
  width: 8px;
  height: 8px;
  border-radius: 2px;
  background: var(--accent);
}
.leadership-subheading{ margin-top: 8px; }

@media (max-width: 700px){
  .org-card{ grid-template-columns: 1fr; }
  .org-logo{ width: 120px; height: 120px; }
}

/* ============ ACCESSIBILITY ============ */
.access-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  margin: 36px 0 56px;
}
.access-card{
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
}
.access-card h3{ font-size: 1.02rem; margin-bottom: 0.5em; }
.access-card p{ font-size: 0.92rem; margin: 0; }

.philosophy-heading{ margin-bottom: 8px; }
.philosophy-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
}
.philosophy-card{
  border-left: 3px solid var(--accent);
  padding: 4px 0 4px 18px;
}
.philosophy-title{
  font-family: var(--font-display);
  font-weight: 600;
  color: var(--ink);
  margin-bottom: 0.3em;
}
.philosophy-card p:last-child{ font-size: 0.92rem; margin: 0; }

@media (max-width: 980px){
  .access-grid, .philosophy-grid{ grid-template-columns: 1fr 1fr; }
}
@media (max-width: 600px){
  .access-grid, .philosophy-grid{ grid-template-columns: 1fr; }
}

/* ============ SKILLS ============ */
.skills-grid{
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}
.skill-group h3{ margin-bottom: 6px; }
.skill-group-desc{ font-size: 0.86rem; margin-bottom: 14px; color: var(--ink-faint); }
.tag-list{ display: flex; flex-direction: column; gap: 8px; }
.tag-list li{
  font-size: 0.88rem;
  padding: 9px 12px;
  background: var(--bg-soft);
  border-radius: 8px;
  color: var(--ink);
}
@media (max-width: 980px){ .skills-grid{ grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px){ .skills-grid{ grid-template-columns: 1fr; } }

/* ============ TRAINING TIMELINE ============ */
.timeline{
  position: relative;
  max-width: 760px;
  margin-top: 40px;
  padding-left: 28px;
  border-left: 2px solid var(--border-strong);
}
.timeline-item{
  position: relative;
  padding-bottom: 34px;
}
.timeline-item:last-child{ padding-bottom: 0; }
.timeline-item::before{
  content: "";
  position: absolute;
  left: -34px;
  top: 4px;
  width: 12px; height: 12px;
  border-radius: 50%;
  background: var(--accent);
  border: 3px solid var(--bg-soft);
}
.timeline-year{
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.82rem;
  color: var(--accent-ink);
  display: block;
  margin-bottom: 4px;
}
.timeline-body h3{ font-size: 1.02rem; margin-bottom: 0.25em; }
.timeline-org{ font-size: 0.9rem; margin: 0; color: var(--ink-faint); }

/* ============ ACHIEVEMENTS ============ */
.achievements-grid{
  display: grid;
  grid-template-columns: 1.2fr 1fr;
  gap: 24px;
}
.achievement-card{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  background: var(--bg);
}
.achievement-featured{
  background: var(--ink);
  border-color: var(--ink);
}
.achievement-featured h3, .achievement-featured p{ color: #fff; }
.achievement-featured .achievement-org{ color: #C6CCE0; }
.achievement-badge{
  display: inline-block;
  font-family: var(--font-mono);
  font-weight: 600;
  font-size: 0.8rem;
  padding: 6px 12px;
  border-radius: 999px;
  background: var(--highlight);
  color: #3A2600;
  margin-bottom: 16px;
}
.achievement-badge-alt{ background: var(--bg-soft); color: var(--ink); }
.achievement-org{ font-size: 0.9rem; color: var(--ink-faint); margin-bottom: 12px; }
@media (max-width: 780px){ .achievements-grid{ grid-template-columns: 1fr; } }

/* ============ EDUCATION ============ */
.education-grid{
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-bottom: 28px;
}
.education-card{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 24px;
  background: var(--bg);
}
.education-org{ color: var(--ink-faint); font-size: 0.92rem; margin-bottom: 8px; }
.education-note{ font-size: 0.9rem; margin: 0; }
.education-meta{ margin: 16px 0 0; display: flex; flex-direction: column; gap: 8px; }
.education-meta div{ display: flex; justify-content: space-between; font-size: 0.88rem; border-top: 1px solid var(--border); padding-top: 8px; }
.education-meta dt{ color: var(--ink-faint); }
.education-meta dd{ margin: 0; font-weight: 600; }
.reference-note{
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--ink-faint);
}
@media (max-width: 980px){ .education-grid{ grid-template-columns: 1fr; } }

/* ============ CERTIFICATES ============ */
.certificate-featured{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 32px;
  background: var(--bg-soft);
  margin-bottom: 40px;
}
.certificate-kicker{
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--accent-ink);
  font-weight: 600;
  margin-bottom: 6px;
}
.certificate-meta{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 16px;
  margin-top: 20px;
}
.certificate-meta dt{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  margin-bottom: 3px;
}
.certificate-meta dd{ margin: 0; font-size: 0.92rem; color: var(--ink); }

.cert-subheading{ margin-bottom: 14px; }
.cert-list{ display: flex; flex-direction: column; }
.cert-list li{
  display: flex;
  justify-content: space-between;
  align-items: baseline;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--border);
  flex-wrap: wrap;
}
.cert-list-title{
  display: block;
  font-weight: 600;
  font-size: 0.95rem;
  color: var(--ink);
  margin-bottom: 4px;
}
.cert-list-desc{
  display: block;
  font-size: 0.86rem;
  color: var(--ink-faint);
  max-width: 52ch;
}
.cert-list-org{
  color: var(--ink-faint);
  font-size: 0.85rem;
  font-family: var(--font-mono);
  white-space: nowrap;
  flex-shrink: 0;
}

@media (max-width: 700px){
  .certificate-meta{ grid-template-columns: 1fr; }
}

/* ============ PROJECTS ============ */
.project-grid{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  margin-top: 32px;
}
.project-card{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  background: var(--bg);
}
.project-kicker{
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--accent-ink);
  font-weight: 600;
  margin-bottom: 10px;
}
.project-card h3{ margin-bottom: 0.5em; }
.project-links{
  display: flex;
  flex-wrap: wrap;
  gap: 10px 20px;
  margin-top: 16px;
}
.project-link{
  font-weight: 600;
  font-size: 0.92rem;
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 8px 4px;
  min-height: 24px;
}
.project-link:hover{ text-decoration: underline; }

@media (max-width: 780px){
  .project-grid{ grid-template-columns: 1fr; }
}

/* ============ CONTACT ============ */
.contact-grid{
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 48px;
  margin-top: 32px;
}
.contact-details{ display: flex; flex-direction: column; gap: 16px; }
.contact-link{
  display: flex;
  flex-direction: column;
  gap: 4px;
  padding: 18px 20px;
  border: 1px solid var(--border);
  border-radius: 12px;
  text-decoration: none;
}
.contact-link:hover{ border-color: var(--accent); }
.contact-label{
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}
.contact-value{ font-weight: 600; color: var(--ink); }

.contact-form{
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 28px;
  background: var(--bg-soft);
}
.form-field{ margin-bottom: 18px; }
.form-field label{
  display: block;
  font-weight: 600;
  font-size: 0.9rem;
  margin-bottom: 6px;
  color: var(--ink);
}
.form-field input,
.form-field textarea{
  width: 100%;
  padding: 12px 14px;
  border: 1.5px solid var(--border-strong);
  border-radius: 8px;
  font-family: var(--font-body);
  font-size: 0.95rem;
  background: var(--bg);
  color: var(--ink);
}
.form-error{
  display: block;
  color: #C0273B;
  font-size: 0.82rem;
  margin-top: 6px;
  min-height: 1em;
}
.form-status{
  font-size: 0.9rem;
  font-weight: 600;
  min-height: 1.2em;
  margin: 0 0 12px;
}
.form-status.success{ color: #1B7A3D; }
.form-note{ font-size: 0.82rem; color: var(--ink-faint); margin: 4px 0 20px; }

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

/* ============ FOOTER ============ */
.site-footer{
  border-top: 1px solid var(--border);
  padding: 40px 24px;
}
.footer-inner{
  max-width: var(--max-width);
  margin: 0 auto;
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}
.footer-name{ font-family: var(--font-display); font-weight: 700; margin: 0; color: var(--ink); }
.footer-tagline{ margin: 2px 0 0; font-size: 0.85rem; }
.footer-links{ display: flex; gap: 8px; }
.footer-links a{
  text-decoration: none;
  font-weight: 600;
  font-size: 0.9rem;
  padding: 8px 10px;
  border-radius: 6px;
  display: inline-block;
}
.footer-links a:hover{ background: var(--bg-soft); }
.footer-copy{
  width: 100%;
  font-size: 0.8rem;
  color: var(--ink-faint);
  margin: 8px 0 0;
  text-align: left;
}

/* ---------- Fade-in on scroll ---------- */
.reveal{
  opacity: 0;
  transform: translateY(14px);
  transition: opacity 0.5s ease, transform 0.5s ease;
}
.reveal.is-visible{
  opacity: 1;
  transform: none;
}
@media (prefers-reduced-motion: reduce){
  .reveal{ opacity: 1; transform: none; }
}