/* =========================================================
   Ejoke Ekpagha — Personal Site
   Design system: clean, clinical-systems aesthetic.
   Space Grotesk (display) + IBM Plex Sans (body) + IBM Plex Mono (utility)
   ========================================================= */

:root {
  --white:      #FFFFFF;
  --paper:      #F6F7F9;
  --ink:        #15191D;
  --ink-soft:   #565D66;
  --ink-faint:  #8A9099;
  --line:       #E3E6EA;
  --line-soft:  #EEF0F3;
  --blue:       #2B5A96;
  --blue-bright:#3E7CC2;
  --blue-pale:  #EAF1FA;
  --green:      #2E8B67;
  --green-pale: #E8F4EE;
  --red:        #A33D2D;

  --max: 1120px;
  --max-prose: 700px;

  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2.5rem;
  --space-5: 4rem;
  --space-6: 6rem;
  --space-7: 9rem;

  --radius-sm: 6px;
  --radius-md: 10px;

  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

*, *::before, *::after { box-sizing: border-box; }
html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: 0.01ms !important; transition-duration: 0.01ms !important; }
}

body {
  margin: 0;
  background: var(--white);
  color: var(--ink);
  font-family: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4 {
  font-family: "Space Grotesk", "IBM Plex Sans", sans-serif;
  font-weight: 600;
  line-height: 1.15;
  letter-spacing: -0.01em;
  margin: 0;
  color: var(--ink);
}

p { margin: 0 0 1em; }
p:last-child { margin-bottom: 0; }

a { color: var(--blue); text-decoration: none; }
a:hover { color: var(--blue-bright); }

img { max-width: 100%; display: block; border-radius: var(--radius-md); }

ul, ol { padding-left: 1.2em; }

::selection { background: var(--blue-pale); color: var(--ink); }

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

/* ---------- Layout helpers ---------- */

.wrap {
  max-width: var(--max);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

.prose {
  max-width: var(--max-prose);
  margin: 0 auto;
  padding: 0 var(--space-3);
}

section { padding: var(--space-6) 0; }
section.tight { padding: var(--space-5) 0; }
section.alt { background: var(--paper); }

.hr {
  border: none;
  border-top: 1px solid var(--line);
  margin: 0;
}

/* ---------- Eyebrow / labels ---------- */

.eyebrow {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--ink-faint);
  display: block;
  margin-bottom: var(--space-2);
}

.tag {
  display: inline-flex;
  align-items: center;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  padding: 0.3em 0.7em;
  border-radius: 999px;
  background: var(--paper);
  color: var(--ink-soft);
  border: 1px solid var(--line);
}
.tag.blue { background: var(--blue-pale); color: var(--blue); border-color: transparent; }

/* ---------- Nav ---------- */

.nav {
  position: sticky;
  top: 0;
  z-index: 50;
  background: rgba(255,255,255,0.88);
  backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}

.nav .wrap {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

.nav-logo {
  font-family: "Space Grotesk", sans-serif;
  font-weight: 600;
  font-size: 1.02rem;
  color: var(--ink);
  letter-spacing: -0.01em;
}
.nav-logo span { color: var(--blue); }

.nav-links {
  display: flex;
  gap: var(--space-4);
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  letter-spacing: 0.04em;
  text-transform: uppercase;
}
.nav-links a { color: var(--ink-soft); }
.nav-links a:hover, .nav-links a.active { color: var(--blue); }

.nav-toggle { display: none; }

@media (max-width: 760px) {
  .nav-links {
    position: fixed;
    inset: 68px 0 0 0;
    background: var(--white);
    flex-direction: column;
    padding: var(--space-4) var(--space-3);
    gap: var(--space-3);
    display: none;
    height: calc(100vh - 68px);
    overflow-y: auto;
  }
  .nav-links.open { display: flex; }
  .nav-toggle {
    display: block;
    background: none;
    border: none;
    font-family: "IBM Plex Mono", monospace;
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--ink);
    cursor: pointer;
  }
}

/* ---------- Buttons ---------- */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5em;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  padding: 0.85em 1.4em;
  border-radius: var(--radius-sm);
  border: 1px solid var(--ink);
  color: var(--ink);
  background: var(--white);
  cursor: pointer;
  transition: background 0.2s var(--ease), color 0.2s var(--ease), border-color 0.2s var(--ease);
}
.btn:hover { background: var(--ink); color: var(--white); }

.btn.primary { background: var(--ink); color: var(--white); }
.btn.primary:hover { background: var(--blue); border-color: var(--blue); color: var(--white); }

.btn-row { display: flex; gap: var(--space-2); flex-wrap: wrap; }

/* ---------- Hero ---------- */

.hero {
  padding: var(--space-7) 0 var(--space-6);
}
.hero-eyebrow {
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.82rem;
  letter-spacing: 0.03em;
  color: var(--blue);
  margin-bottom: var(--space-2);
}
.hero h1 {
  font-size: clamp(2.4rem, 5.2vw, 4rem);
  max-width: 15ch;
}
.hero .lede {
  margin-top: var(--space-3);
  font-size: 1.15rem;
  color: var(--ink-soft);
  max-width: 46ch;
  line-height: 1.6;
}
.hero .btn-row { margin-top: var(--space-4); }

/* signal line — signature device */
.signal {
  margin-top: var(--space-6);
  display: flex;
  align-items: center;
  gap: 0;
}
.signal-line {
  flex: 1;
  height: 1px;
  background: repeating-linear-gradient(to right, var(--line) 0 6px, transparent 6px 12px);
}
.signal-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--blue);
  flex-shrink: 0;
  box-shadow: 0 0 0 4px var(--blue-pale);
}

/* ---------- Stats ---------- */

.stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-3);
}
.stat {
  padding: var(--space-3) 0;
  border-top: 1px solid var(--line);
}
.stat .num {
  font-family: "Space Grotesk", sans-serif;
  font-size: clamp(1.7rem, 3vw, 2.3rem);
  font-weight: 600;
  color: var(--ink);
}
.stat .label {
  margin-top: 0.35em;
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.76rem;
  letter-spacing: 0.03em;
  color: var(--ink-soft);
}

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

/* ---------- Section heads ---------- */

.section-head {
  display: flex;
  justify-content: space-between;
  align-items: flex-end;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
  flex-wrap: wrap;
}
.section-head h2 { font-size: clamp(1.6rem, 3vw, 2.1rem); }
.section-head .see-all { font-family: "IBM Plex Mono", monospace; font-size: 0.8rem; }

/* ---------- About ---------- */

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-5);
  align-items: start;
}
@media (max-width: 800px) {
  .about-grid { grid-template-columns: 1fr; gap: var(--space-4); }
}
.about-body p { color: var(--ink-soft); font-size: 1.02rem; }
.about-body p strong { color: var(--ink); font-weight: 600; }

/* ---------- Project cards ---------- */

.projects-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
}
@media (max-width: 800px) {
  .projects-grid { grid-template-columns: 1fr; }
}

.card {
  display: block;
  border: 1px solid var(--line);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--white);
  transition: border-color 0.2s var(--ease), transform 0.2s var(--ease);
}
.card:hover { border-color: var(--blue); transform: translateY(-2px); }

.card-media {
  aspect-ratio: 16/10;
  overflow: hidden;
  background: var(--paper);
  border-bottom: 1px solid var(--line);
}
.card-media img { width: 100%; height: 100%; object-fit: cover; object-position: top; border-radius: 0; display: block; }

.card-body { padding: var(--space-3) var(--space-3) var(--space-4); }
.card-body h3 { font-size: 1.2rem; margin-bottom: 0.4em; }
.card-body p { color: var(--ink-soft); font-size: 0.95rem; }
.card-tags { display: flex; gap: 0.4em; flex-wrap: wrap; margin-top: var(--space-2); }

.card.locked { opacity: 0.55; pointer-events: none; }

/* ---------- Project page ---------- */

.project-hero { padding: var(--space-6) 0 var(--space-5); }
.project-hero .eyebrow { color: var(--blue); }
.project-hero h1 { font-size: clamp(2rem, 4.4vw, 3rem); max-width: 22ch; }
.project-meta {
  display: flex;
  gap: var(--space-4);
  flex-wrap: wrap;
  margin-top: var(--space-4);
  padding-top: var(--space-3);
  border-top: 1px solid var(--line);
}
.project-meta .m-label { font-family: "IBM Plex Mono", monospace; font-size: 0.7rem; text-transform: uppercase; letter-spacing: 0.08em; color: var(--ink-faint); display: block; margin-bottom: 0.3em; }
.project-meta .m-value { font-size: 0.92rem; color: var(--ink); }

.figure { margin: var(--space-5) 0; }
.figure img { border: 1px solid var(--line); }
.figure figcaption {
  margin-top: var(--space-2);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.78rem;
  color: var(--ink-faint);
}

.callout {
  border-left: 2px solid var(--blue);
  background: var(--blue-pale);
  padding: var(--space-3) var(--space-4);
  border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
  margin: var(--space-4) 0;
}
.callout p { color: var(--ink); font-size: 0.98rem; }

.result-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-3);
  margin: var(--space-4) 0;
}
@media (max-width: 700px) { .result-grid { grid-template-columns: 1fr 1fr; } }
.result-card {
  background: var(--paper);
  border-radius: var(--radius-md);
  padding: var(--space-3);
}
.result-card .num { font-family: "Space Grotesk", sans-serif; font-weight: 600; font-size: 1.6rem; color: var(--blue); }
.result-card .label { font-size: 0.82rem; color: var(--ink-soft); margin-top: 0.3em; }

table.data-table { width: 100%; border-collapse: collapse; margin: var(--space-4) 0; font-size: 0.92rem; }
table.data-table th, table.data-table td { text-align: left; padding: 0.7em 0.8em; border-bottom: 1px solid var(--line); vertical-align: top; }
table.data-table th { font-family: "IBM Plex Mono", monospace; font-size: 0.72rem; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-faint); font-weight: 500; }

/* ---------- Timeline (Approach page) ---------- */

.timeline { position: relative; padding-left: 2.6rem; }
.timeline::before {
  content: "";
  position: absolute;
  left: 0.95rem;
  top: 0.4rem;
  bottom: 0.4rem;
  width: 1px;
  background: var(--line);
}
.t-step { position: relative; padding-bottom: var(--space-5); }
.t-step:last-child { padding-bottom: 0; }
.t-num {
  position: absolute;
  left: -2.6rem;
  top: 0;
  width: 1.9rem;
  height: 1.9rem;
  border-radius: 50%;
  background: var(--white);
  border: 1px solid var(--blue);
  color: var(--blue);
  font-family: "IBM Plex Mono", monospace;
  font-size: 0.72rem;
  display: flex;
  align-items: center;
  justify-content: center;
}
.t-step h3 { font-size: 1.15rem; margin-bottom: 0.5em; }
.t-step p { color: var(--ink-soft); }

/* ---------- Philosophy ---------- */

.tenet {
  padding: var(--space-4) 0;
  border-top: 1px solid var(--line);
}
.tenet:first-of-type { border-top: none; padding-top: 0; }
.tenet h3 { font-size: 1.25rem; margin-bottom: 0.5em; }
.tenet p { color: var(--ink-soft); font-size: 1.02rem; }

/* ---------- Resume ---------- */

.resume-section { margin-bottom: var(--space-5); }
.resume-section h2 { font-size: 1.05rem; font-family: "IBM Plex Mono", monospace; text-transform: uppercase; letter-spacing: 0.06em; color: var(--ink-faint); margin-bottom: var(--space-3); }
.resume-entry { margin-bottom: var(--space-4); }
.resume-entry:last-child { margin-bottom: 0; }
.resume-entry .re-head { display: flex; justify-content: space-between; gap: var(--space-3); flex-wrap: wrap; align-items: baseline; }
.resume-entry h3 { font-size: 1.08rem; }
.resume-entry .re-org { color: var(--blue); font-weight: 500; }
.resume-entry .re-date { font-family: "IBM Plex Mono", monospace; font-size: 0.78rem; color: var(--ink-faint); white-space: nowrap; }
.resume-entry ul { margin: 0.6em 0 0; padding-left: 1.1em; color: var(--ink-soft); font-size: 0.95rem; }
.resume-entry li { margin-bottom: 0.35em; }

.skill-cloud { display: flex; flex-wrap: wrap; gap: 0.5em; }

/* ---------- Contact ---------- */

.contact-hero { text-align: left; padding: var(--space-7) 0; }
.contact-hero h1 { font-size: clamp(2rem, 4.5vw, 3.2rem); max-width: 18ch; }
.contact-links { margin-top: var(--space-4); display: flex; gap: var(--space-3); flex-wrap: wrap; }

/* ---------- Blog ---------- */

.blog-empty {
  border: 1px dashed var(--line);
  border-radius: var(--radius-md);
  padding: var(--space-5);
  text-align: center;
  color: var(--ink-soft);
}

/* ---------- Footer ---------- */

.site-footer {
  border-top: 1px solid var(--line);
  padding: var(--space-4) 0;
  margin-top: var(--space-6);
}
.site-footer .wrap {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-2);
}
.site-footer p { font-family: "IBM Plex Mono", monospace; font-size: 0.76rem; color: var(--ink-faint); margin: 0; }
.footer-links { display: flex; gap: var(--space-3); list-style: none; padding: 0; margin: 0; font-family: "IBM Plex Mono", monospace; font-size: 0.76rem; }
.footer-links a { color: var(--ink-soft); }