/* ============================================================
   Engineering Notebook Theme — Warm Drafting Paper Edition
   Portfolio — style.css
   ============================================================ */

/* ── Design tokens ─────────────────────────────────────────── */
:root {
  /* Backgrounds */
  --bg-base:        #1c1c19;
  --bg-surface:     #222220;
  --bg-panel:       #242420;
  --bg-panel-hover: #2a2a26;

  /* Grid / structure */
  --grid-minor:     rgba(180, 150, 90, 0.06);
  --grid-major:     rgba(180, 150, 90, 0.11);
  --border-color:   rgba(180, 150, 90, 0.22);
  --border-accent:  rgba(200, 145, 58, 0.6);
  --border-dash:    rgba(180, 150, 90, 0.35);

  /* Text */
  --text-primary:   #ede8df;
  --text-secondary: #a89880;
  --text-muted: #8a7d6e;
  --text-accent:    #c8913a;
  --text-accent-lt: #dba85a;

  /* Fonts */
  --font-body: 'Ubuntu', sans-serif;
  --font-mono: 'Special Elite', 'Courier New', serif;
  --font-hand: 'Architects Daughter', cursive;
  --font-code: 'Ubuntu Mono', 'Courier New', monospace;

  /* Spacing */
  --section-gap: 2rem;
}

/* ── Reset / base ──────────────────────────────────────────── */
*, *::before, *::after {
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 1rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

/* ── Graph-paper background ────────────────────────────────── */
/*
   Four layered gradients: minor grid at 24px, major at 96px.
   Warm amber tint — reads as aged drafting paper, not a monitor.
*/
body::before {
  content: '';
  position: fixed;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-major) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-major) 1px, transparent 1px),
    linear-gradient(var(--grid-minor) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-minor) 1px, transparent 1px);
  background-size:
    96px 96px,
    96px 96px,
    24px 24px,
    24px 24px;
}

/* All content sits above the grid */
nav, main, footer {
  position: relative;
  z-index: 1;
}

/* ── Navbar ────────────────────────────────────────────────── */
.nb-main {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: rgba(28, 28, 25, 0.93);
  backdrop-filter: blur(8px);
  border-bottom: 1px dashed var(--border-dash);
  padding: 0.75rem 0;
}

.nb-brand {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary) !important;
  letter-spacing: 0.02em;
  text-decoration: none;
}

.nb-brand-bracket {
  color: var(--text-accent);
}

.nb-link {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--text-secondary) !important;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 0.4rem 0.7rem !important;
  border-radius: 2px;
  transition: color 0.15s ease, background-color 0.15s ease;
}

.nb-link:hover {
  color: var(--text-primary) !important;
  background-color: rgba(200, 145, 58, 0.08);
}

/* Contact — outlined, amber */
.nb-contact-btn {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 400;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--text-accent) !important;
  border: 1px dashed var(--border-accent);
  padding: 0.4rem 0.85rem !important;
  border-radius: 2px;
  text-decoration: none;
  transition: background-color 0.15s ease, color 0.15s ease;
}

.nb-contact-btn:hover {
  background-color: rgba(200, 145, 58, 0.1);
  color: var(--text-accent-lt) !important;
}

.navbar-toggler {
  border-color: var(--border-dash);
}
.navbar-toggler-icon {
  filter: invert(0.6) sepia(0.3);
}


/* ── Main content wrapper ──────────────────────────────────── */
.nb-main-content {
  /* min-height: calc(100vh - 120px); */
}


/* ── Hero ──────────────────────────────────────────────────── */
.nb-hero {
  position: relative;
  padding: 1rem 0 .2rem;
  overflow: hidden;
}

/* Warm radial glow — like a lamp illuminating the page */
.nb-hero::after {
  content: '';
  position: absolute;
  top: -60px;
  left: 40%;
  transform: translateX(-50%);
  width: 900px;
  height: 600px;
  background: radial-gradient(
    ellipse at center,
    rgba(200, 145, 58, 0.06) 0%,
    transparent 68%
  );
  pointer-events: none;
  z-index: 0;
}

.nb-hero-inner {
  position: relative;
  z-index: 1;
  max-width: 740px;
}

.nb-eyebrow {
  font-family: var(--font-hand);
  font-size: 0.9rem;
  color: var(--text-accent);
  letter-spacing: 0.07em;
  margin-bottom: 1.25rem;
}

.nb-hero-name {
  font-family: var(--font-mono);
  font-size: clamp(2.4rem, 5vw, 4rem);
  font-weight: 700;
  color: var(--text-primary);
  line-height: 1.1;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  margin-bottom: 1rem;
}

.nb-hero-role {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-accent);
  letter-spacing: 0.06em;
  text-transform: uppercase;
  margin-bottom: 1.75rem;
  border-left: 3px solid var(--text-accent);
  padding-left: 1rem;
}

.nb-hero-summary {
  font-family: var(--font-body);
  font-size: 1.05rem;
  font-weight: 300;
  color: var(--text-secondary);
  max-width: 580px;
  margin-bottom: 2.5rem;
  line-height: 1.85;
}

/* CTA buttons */
.nb-hero-actions {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
}

.nb-btn-primary {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--bg-base);
  background-color: var(--text-accent);
  border: 1px solid var(--text-accent);
  padding: 0.65rem 1.5rem;
  border-radius: 2px;
  transition: background-color 0.15s ease, border-color 0.15s ease;
}

.nb-btn-primary:hover {
  background-color: var(--text-accent-lt);
  border-color: var(--text-accent-lt);
  color: var(--bg-base);
}

.nb-btn-ghost {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 400;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  text-decoration: none;
  color: var(--text-secondary);
  border: 1px dashed var(--border-dash);
  padding: 0.65rem 1.5rem;
  border-radius: 2px;
  transition: border-color 0.15s ease, color 0.15s ease;
}

.nb-btn-ghost:hover {
  color: var(--text-primary);
  border-color: var(--border-accent);
}

/* Hero grid overlay — denser, warmer */
.nb-hero-grid {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background-image:
    linear-gradient(var(--grid-major) 1px, transparent 1px),
    linear-gradient(90deg, var(--grid-major) 1px, transparent 1px);
  background-size: 48px 48px;
  mask-image: linear-gradient(
    to bottom,
    transparent,
    rgba(0,0,0,0.5) 25%,
    rgba(0,0,0,0.5) 75%,
    transparent
  );
}


/* ── Snapshot panels ───────────────────────────────────────── */
.nb-panels {
  padding: 0 0 1rem;
}

.nb-panel {
  background-color: var(--bg-panel);
  border: 1px dashed var(--border-dash);
  border-top: 2px solid var(--text-accent);
  border-radius: 2px;
  padding: 1.75rem;
  height: 100%;
  display: flex;
  flex-direction: column;
  transition: border-color 0.2s ease, background-color 0.2s ease;
  box-shadow: inset 0 1px 0 rgba(200, 145, 58, 0.06);
}

a.nb-panel {
  display: flex;
  text-decoration: none;
}

.nb-panel .nb-panel-link {
  margin-top: auto;
  align-self: flex-end;
}

.nb-panel:hover {
  border-color: var(--border-accent);
  background-color: var(--bg-panel-hover);
  border-top-color: var(--text-accent-lt);
}

.nb-panel-label {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-accent);
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}

.nb-panel-heading {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--text-primary);
  margin-bottom: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.03em;
}

.nb-panel-body {
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 300;
  color: var(--text-secondary);
  line-height: 1.75;
  margin-bottom: 1.25rem;
}

.nb-panel-link {
  font-family: var(--font-mono);
  font-size: 0.77rem;
  letter-spacing: 0.05em;
  color: var(--text-accent);
  text-decoration: none;
  transition: color 0.15s ease;
  display: block;
  margin-top: auto;

}

.nb-panel-link:hover {
  color: var(--text-accent-lt);
}


/* ── Footer ────────────────────────────────────────────────── */
.nb-footer {
  /* border-top: 1px dashed var(--border-dash); */
  padding: 1.5rem 0;
}

.nb-footer-text {
  font-family: var(--font-hand);
  font-size: 0.9rem;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}


/* ── Utility: section divider ──────────────────────────────── */
.nb-divider {
  border: none;
  border-top: 1px dashed var(--border-dash);
  margin: var(--section-gap) 0;
  opacity: 1;
}

/* ── Page header ───────────────────────────────────────────── */
.nb-page-header {
  padding: 1rem 0 2rem;
  border-bottom: 1px dashed var(--border-dash);
  margin-bottom: 3rem;
}

.nb-page-title {
  font-family: var(--font-body);
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  color: var(--text-primary);
  letter-spacing: 0.03em;
  margin: 0;
}

/* ── Section spacing ───────────────────────────────────────── */
.nb-section {
  padding-bottom: var(--section-gap);
}

/* ── Meta list (sidebar) ───────────────────────────────────── */
.nb-meta-list {
  list-style: none;
  padding: 0;
  margin: 0;
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

.nb-meta-key {
  display: block;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-accent);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 0.15rem;
}

.nb-meta-val {
  display: block;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--text-primary);
}

.nb-status-active::before {
  content: '● ';
  color: #6abf69;
  font-size: 0.7rem;
}

/* ── Content blocks ────────────────────────────────────────── */
.nb-content-block {
  background-color: rgba(36, 36, 32, 0.75);
  border: 1px dashed var(--border-dash);
  border-left: 3px solid var(--border-accent);
  border-radius: 2px;
  padding: 1.75rem 2rem;
  margin-bottom: 1.5rem;
  backdrop-filter: blur(4px);
}

.nb-content-block p:not(.nb-panel-label):not(.nb-cert-date) {
  font-family: var(--font-body);
  font-size: 1.05rem;
  color: var(--text-secondary);
  line-height: 2;
  margin-bottom: 0.75rem;
}

.nb-section-heading {
  font-family: var(--font-mono);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--text-accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: 1.1rem;
  padding-bottom: 0.5rem;
  border-bottom: 1px dashed var(--border-dash);
}

.nb-content-block p:last-child {
  margin-bottom: 0;
}

/* ── Blockquote ────────────────────────────────────────────── */
.nb-blockquote {
  border-left: 3px solid var(--text-accent);
  padding: 0.75rem 1.25rem;
  margin: 1rem 0;
  font-family: var(--font-hand);
  font-size: 0.98rem;
  color: var(--text-secondary);
  font-style: italic;
}

.nb-blockquote cite {
  display: block;
  margin-top: 0.5rem;
  font-size: 0.82rem;
  color: var(--text-muted);
  font-style: normal;
  letter-spacing: 0.05em;
}

/* ── CTA row ───────────────────────────────────────────────── */
.nb-cta-row {
  display: flex;
  gap: 1rem;
  flex-wrap: wrap;
  margin-top: 1rem;
}