/* =========================================================
   Md. Mustafizur Rahman — Portfolio
   Design concept: "Blueprint Craftsman"
   A builder of digital structures — deep forest green +
   brass-gold accents, viewfinder corner-brackets as the
   signature framing device, monospace "// comment" eyebrows
   nodding to the developer's own vernacular.
========================================================= */

:root {
  --color-bg: #F7F5F0;
  --color-bg-alt: #EFEBE1;
  --color-bg-dark: #0B3D2E;
  --color-bg-dark-2: #0F4A38;
  --color-bg-dark-3: #123F32;
  --color-accent: #C9A24B;
  --color-accent-light: #E0C172;
  --color-accent-dark: #A8842F;
  --color-text: #1B1E1B;
  --color-text-light: #F7F5F0;
  --color-text-muted: #62655E;
  --color-text-muted-light: #C7CFC8;
  --color-border: #DCD6C6;
  --color-border-dark: #1E5B47;
  --color-danger: #B3432B;
  --color-success: #2F6B4F;

  --font-display: 'Space Grotesk', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --container: 1180px;
  --radius: 4px;
  --transition: 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}

body {
  margin: 0;
  font-family: var(--font-body);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.7;
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 700;
  line-height: 1.2;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

p { margin: 0 0 1em; }

a { color: inherit; text-decoration: none; }

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

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

button { font-family: inherit; cursor: pointer; }

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

.container {
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 24px;
}

/* ---------------------------------------------------------
   Eyebrow / signature mono labels (the "// comment" motif)
--------------------------------------------------------- */
.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--color-accent-dark);
  margin-bottom: 14px;
}
.eyebrow::before { content: '//'; opacity: 0.6; }
.on-dark .eyebrow { color: var(--color-accent-light); }

.section-head {
  max-width: 640px;
  margin: 0 auto 56px;
  text-align: center;
}
.section-head h2 { font-size: clamp(28px, 4vw, 40px); }
.section-head p { color: var(--color-text-muted); font-size: 17px; margin: 0; }
.on-dark .section-head p { color: var(--color-text-muted-light); }

section { padding: 100px 0; position: relative; }
.bg-alt { background: var(--color-bg-alt); }
.on-dark {
  background: var(--color-bg-dark);
  color: var(--color-text-light);
}

/* Blueprint grid texture for dark sections */
.on-dark {
  background-image:
    linear-gradient(rgba(247,245,240,0.045) 1px, transparent 1px),
    linear-gradient(90deg, rgba(247,245,240,0.045) 1px, transparent 1px);
  background-size: 42px 42px;
}

/* ---------------------------------------------------------
   Buttons
--------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  font-family: var(--font-mono);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: 0.03em;
  text-transform: uppercase;
  border-radius: var(--radius);
  border: 1px solid transparent;
  transition: all var(--transition);
  white-space: nowrap;
}
.btn-primary {
  background: var(--color-accent);
  color: var(--color-bg-dark);
}
.btn-primary:hover {
  background: var(--color-accent-light);
  transform: translateY(-2px);
}
.btn-outline {
  border-color: rgba(247,245,240,0.4);
  color: var(--color-text-light);
}
.btn-outline:hover {
  border-color: var(--color-accent);
  background: rgba(201,162,75,0.1);
  transform: translateY(-2px);
}
.btn-outline-dark {
  border-color: var(--color-bg-dark);
  color: var(--color-bg-dark);
}
.btn-outline-dark:hover {
  background: var(--color-bg-dark);
  color: var(--color-text-light);
}
.btn-block { width: 100%; justify-content: center; }
.btn:disabled { opacity: 0.6; cursor: not-allowed; transform: none !important; }

/* ---------------------------------------------------------
   Corner-bracket viewfinder frame — the signature element
--------------------------------------------------------- */
.bracket-frame {
  position: relative;
  padding: 18px;
}
.bracket-frame::before,
.bracket-frame::after,
.bracket-frame .bf-tr,
.bracket-frame .bf-br {
  content: '';
  position: absolute;
  width: 28px;
  height: 28px;
  border: 2px solid var(--color-accent);
}
.bracket-frame::before { top: 0; left: 0; border-right: none; border-bottom: none; }
.bracket-frame::after  { bottom: 0; right: 0; border-left: none; border-top: none; }
.bracket-frame .bf-tr  { top: 0; right: 0; border-left: none; border-bottom: none; }
.bracket-frame .bf-br  { bottom: 0; left: 0; border-right: none; border-top: none; }
.bracket-frame .bf-inner { overflow: hidden; }
.bracket-frame img { width: 100%; height: 100%; object-fit: cover; }

/* ---------------------------------------------------------
   Header / Navigation
--------------------------------------------------------- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(11,61,46,0);
  transition: background var(--transition), box-shadow var(--transition), padding var(--transition);
  padding: 22px 0;
}
.site-header.scrolled {
  background: rgba(11,61,46,0.97);
  box-shadow: 0 4px 24px rgba(0,0,0,0.18);
  padding: 14px 0;
}
.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
}
.logo {
  font-family: var(--font-display);
  font-size: 22px;
  font-weight: 700;
  color: var(--color-text-light);
  display: flex;
  align-items: baseline;
  gap: 4px;
}
.logo span { color: var(--color-accent); }

.nav-menu {
  display: flex;
  align-items: center;
  gap: 34px;
}
.nav-menu a {
  font-family: var(--font-mono);
  font-size: 13px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: var(--color-text-muted-light);
  transition: color var(--transition);
  position: relative;
  padding: 4px 0;
}
.nav-menu a:hover,
.nav-menu a.active { color: var(--color-text-light); }
.nav-menu a.active::after {
  content: '';
  position: absolute;
  left: 0; bottom: -4px;
  width: 100%; height: 2px;
  background: var(--color-accent);
}
.nav-cta { margin-left: 10px; }

.nav-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--color-text-light);
  font-size: 24px;
  z-index: 1100;
}

@media (max-width: 900px) {
  .nav-toggle { display: block; }
  .nav-menu {
    position: fixed;
    top: 0; right: -100%;
    width: min(320px, 80vw);
    height: 100vh;
    background: var(--color-bg-dark-2);
    flex-direction: column;
    justify-content: center;
    gap: 28px;
    transition: right var(--transition);
    box-shadow: -10px 0 40px rgba(0,0,0,0.3);
  }
  .nav-menu.open { right: 0; }
  .nav-cta { margin-left: 0; }
}

/* ---------------------------------------------------------
   Hero
--------------------------------------------------------- */
.hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding-top: 120px;
  padding-bottom: 60px;
  position: relative;
  overflow: hidden;
}
.hero .container {
  display: grid;
  grid-template-columns: 1.1fr 0.9fr;
  gap: 60px;
  align-items: center;
}
.hero-greeting {
  font-family: var(--font-mono);
  font-size: 15px;
  color: var(--color-accent-light);
  letter-spacing: 0.05em;
  margin-bottom: 14px;
  display: block;
}
.hero h1 {
  font-size: clamp(38px, 5.5vw, 64px);
  color: var(--color-text-light);
  margin-bottom: 18px;
}
.hero-role {
  font-family: var(--font-mono);
  font-size: clamp(18px, 2.4vw, 24px);
  color: var(--color-accent);
  min-height: 1.6em;
  margin-bottom: 22px;
}
.hero-role .cursor {
  display: inline-block;
  width: 2px;
  background: var(--color-accent);
  margin-left: 2px;
  animation: blink 1s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero-desc {
  color: var(--color-text-muted-light);
  font-size: 17px;
  max-width: 520px;
  margin-bottom: 34px;
}
.hero-actions { display: flex; gap: 16px; flex-wrap: wrap; margin-bottom: 40px; }
.hero-social { display: flex; gap: 14px; }
.hero-social a {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  border: 1px solid rgba(247,245,240,0.25);
  border-radius: 50%;
  color: var(--color-text-light);
  transition: all var(--transition);
}
.hero-social a:hover {
  background: var(--color-accent);
  border-color: var(--color-accent);
  color: var(--color-bg-dark);
  transform: translateY(-3px);
}
.hero-visual { position: relative; justify-self: center; }
.hero-visual .bracket-frame { width: min(380px, 80vw); aspect-ratio: 3/3.4; }
.hero-visual .bf-inner { width: 100%; height: 100%; background: var(--color-bg-dark-3); }
.hero-visual .bf-inner img { width: 100%; height: 100%; object-fit: cover; }

.scroll-cue {
  position: absolute;
  bottom: 28px; left: 50%;
  transform: translateX(-50%);
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--color-text-muted-light);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 8px;
  letter-spacing: 0.1em;
}
.scroll-cue .line {
  width: 1px; height: 36px;
  background: linear-gradient(var(--color-accent), transparent);
  animation: scrollline 1.8s ease-in-out infinite;
}
@keyframes scrollline { 0%{transform:scaleY(0);transform-origin:top;} 50%{transform:scaleY(1);transform-origin:top;} 50.01%{transform-origin:bottom;} 100%{transform:scaleY(0);transform-origin:bottom;} }

@media (max-width: 900px) {
  .hero .container { grid-template-columns: 1fr; text-align: center; }
  .hero-desc { margin-left: auto; margin-right: auto; }
  .hero-actions, .hero-social { justify-content: center; }
  .hero-visual { order: -1; }
}

/* ---------------------------------------------------------
   About
--------------------------------------------------------- */
.about-grid {
  display: grid;
  grid-template-columns: 0.85fr 1.15fr;
  gap: 70px;
  align-items: center;
}
.about-visual .bracket-frame { aspect-ratio: 4/4.6; }
.about-visual .bf-inner { width: 100%; height: 100%; background: var(--color-bg-alt); }
.about-visual .bf-inner img { width: 100%; height: 100%; object-fit: cover; }

.about-info-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 14px 28px;
  margin: 30px 0;
}
.about-info-list li {
  font-size: 15px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: 10px;
}
.about-info-list .label {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-text-muted);
  display: block;
  margin-bottom: 4px;
}

.about-stats {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
  margin-top: 36px;
}
.stat-box {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px 16px;
  text-align: center;
}
.stat-box .num {
  font-family: var(--font-display);
  font-size: 34px;
  font-weight: 700;
  color: var(--color-accent-dark);
  display: block;
}
.stat-box .label {
  font-family: var(--font-mono);
  font-size: 11.5px;
  text-transform: uppercase;
  color: var(--color-text-muted);
  letter-spacing: 0.04em;
}

@media (max-width: 900px) {
  .about-grid { grid-template-columns: 1fr; }
  .about-info-list { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .about-stats { grid-template-columns: 1fr; }
}

/* ---------------------------------------------------------
   Services
--------------------------------------------------------- */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}
.service-card {
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 36px 28px;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
}
.service-card:hover {
  transform: translateY(-6px);
  border-color: var(--color-accent);
  box-shadow: 0 16px 40px rgba(11,61,46,0.08);
}
.service-icon {
  width: 56px; height: 56px;
  display: flex; align-items: center; justify-content: center;
  background: var(--color-bg-dark);
  color: var(--color-accent);
  border-radius: var(--radius);
  font-size: 22px;
  margin-bottom: 22px;
}
.service-card h3 { font-size: 19px; margin-bottom: 10px; }
.service-card p { color: var(--color-text-muted); font-size: 15px; margin: 0; }

@media (max-width: 900px) { .services-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .services-grid { grid-template-columns: 1fr; } }

/* ---------------------------------------------------------
   Skills
--------------------------------------------------------- */
.skills-list { display: flex; flex-direction: column; gap: 26px; max-width: 760px; margin: 0 auto; }
.skill-row .skill-top {
  display: flex; justify-content: space-between;
  font-family: var(--font-mono);
  font-size: 14px;
  margin-bottom: 8px;
}
.skill-row .skill-top .pct { color: var(--color-accent); }
.skill-track {
  height: 8px;
  background: rgba(247,245,240,0.1);
  border-radius: 8px;
  overflow: hidden;
}
.on-dark .skill-track { background: rgba(247,245,240,0.1); }
.skill-fill {
  height: 100%;
  width: 0;
  background: linear-gradient(90deg, var(--color-accent-dark), var(--color-accent));
  border-radius: 8px;
  transition: width 1.4s cubic-bezier(0.25,0.8,0.25,1);
}

/* ---------------------------------------------------------
   Portfolio
--------------------------------------------------------- */
.portfolio-filters {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: 10px;
  margin-bottom: 46px;
}
.filter-btn {
  font-family: var(--font-mono);
  font-size: 12.5px;
  text-transform: uppercase;
  letter-spacing: 0.04em;
  padding: 9px 18px;
  border: 1px solid var(--color-border);
  border-radius: 30px;
  background: transparent;
  color: var(--color-text-muted);
  transition: all var(--transition);
}
.filter-btn:hover, .filter-btn.active {
  background: var(--color-bg-dark);
  border-color: var(--color-bg-dark);
  color: var(--color-text-light);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 30px;
}
.portfolio-item { display: none; }
.portfolio-item.show { display: block; animation: fadeUp 0.5s ease both; }
.portfolio-card { position: relative; border-radius: var(--radius); overflow: hidden; }
.portfolio-card .pf-img { aspect-ratio: 4/3; overflow: hidden; background: var(--color-bg-alt); }
.portfolio-card .pf-img img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.6s var(--transition); }
.portfolio-card:hover .pf-img img { transform: scale(1.08); }
.portfolio-overlay {
  position: absolute; inset: 0;
  background: linear-gradient(0deg, rgba(11,61,46,0.94) 0%, rgba(11,61,46,0.2) 60%, transparent 100%);
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 26px;
  opacity: 0;
  transition: opacity var(--transition);
}
.portfolio-card:hover .portfolio-overlay { opacity: 1; }
.portfolio-overlay .cat {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  color: var(--color-accent-light);
  margin-bottom: 6px;
  letter-spacing: 0.05em;
}
.portfolio-overlay h3 { color: var(--color-text-light); font-size: 19px; margin-bottom: 10px; }
.portfolio-overlay a {
  font-family: var(--font-mono);
  font-size: 12.5px;
  color: var(--color-text-light);
  display: inline-flex;
  align-items: center;
  gap: 6px;
}
.portfolio-overlay a:hover { color: var(--color-accent-light); }
.featured-tag {
  position: absolute; top: 16px; left: 16px;
  background: var(--color-accent);
  color: var(--color-bg-dark);
  font-family: var(--font-mono);
  font-size: 10.5px;
  text-transform: uppercase;
  padding: 5px 10px;
  border-radius: 3px;
  letter-spacing: 0.05em;
  z-index: 2;
}

@media (max-width: 900px) { .portfolio-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 600px) { .portfolio-grid { grid-template-columns: 1fr; } }

/* ---------------------------------------------------------
   Resume / Timeline
--------------------------------------------------------- */
.resume-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
}
.resume-col h3 {
  font-family: var(--font-mono);
  font-size: 14px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--color-accent-light);
  margin-bottom: 30px;
  display: flex;
  align-items: center;
  gap: 10px;
}
.resume-col h3::after { content: ''; flex: 1; height: 1px; background: var(--color-border-dark); }
.timeline { position: relative; padding-left: 28px; border-left: 2px solid var(--color-border-dark); }
.timeline-item { position: relative; padding-bottom: 36px; }
.timeline-item:last-child { padding-bottom: 0; }
.timeline-item::before {
  content: '';
  position: absolute;
  left: -34px; top: 4px;
  width: 12px; height: 12px;
  background: var(--color-accent);
  border-radius: 50%;
  box-shadow: 0 0 0 4px var(--color-bg-dark);
}
.timeline-item .duration {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--color-accent);
  margin-bottom: 6px;
  display: block;
}
.timeline-item h4 { color: var(--color-text-light); font-size: 17px; margin-bottom: 4px; }
.timeline-item .institution { color: var(--color-text-muted-light); font-size: 14px; margin-bottom: 8px; display: block; }
.timeline-item p { color: var(--color-text-muted-light); font-size: 14.5px; margin: 0; }

@media (max-width: 800px) { .resume-grid { grid-template-columns: 1fr; gap: 50px; } }

/* ---------------------------------------------------------
   Testimonials
--------------------------------------------------------- */
.testimonial-track {
  display: flex;
  gap: 28px;
  overflow-x: auto;
  scroll-snap-type: x mandatory;
  padding-bottom: 10px;
  scrollbar-width: thin;
}
.testimonial-card {
  scroll-snap-align: start;
  flex: 0 0 min(440px, 86vw);
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 32px;
}
.testimonial-card .stars { color: var(--color-accent); font-size: 14px; margin-bottom: 16px; }
.testimonial-card .quote { font-size: 15.5px; color: var(--color-text); margin-bottom: 24px; }
.testimonial-person { display: flex; align-items: center; gap: 14px; }
.testimonial-person img {
  width: 48px; height: 48px; border-radius: 50%; object-fit: cover;
  border: 2px solid var(--color-accent);
}
.testimonial-person .name { font-weight: 600; font-size: 15px; }
.testimonial-person .role { font-family: var(--font-mono); font-size: 12px; color: var(--color-text-muted); }
.testimonial-nav { display: flex; justify-content: center; gap: 14px; margin-top: 30px; }
.testimonial-nav button {
  width: 40px; height: 40px;
  border-radius: 50%;
  border: 1px solid var(--color-border);
  background: transparent;
  display: flex; align-items: center; justify-content: center;
  transition: all var(--transition);
}
.testimonial-nav button:hover { background: var(--color-bg-dark); color: var(--color-text-light); border-color: var(--color-bg-dark); }

/* ---------------------------------------------------------
   Contact
--------------------------------------------------------- */
.contact-grid {
  display: grid;
  grid-template-columns: 0.8fr 1.2fr;
  gap: 60px;
}
.contact-info-card {
  background: var(--color-bg-dark-2);
  border-radius: var(--radius);
  padding: 38px 30px;
  height: fit-content;
}
.contact-info-item { display: flex; gap: 16px; margin-bottom: 26px; }
.contact-info-item:last-child { margin-bottom: 0; }
.contact-info-item .ic {
  width: 42px; height: 42px;
  background: rgba(201,162,75,0.15);
  color: var(--color-accent);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.contact-info-item .label {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  color: var(--color-text-muted-light);
  letter-spacing: 0.05em;
  margin-bottom: 4px;
  display: block;
}
.contact-info-item .value { color: var(--color-text-light); font-size: 15px; word-break: break-word; }
.contact-social { display: flex; gap: 12px; margin-top: 30px; }
.contact-social a {
  width: 38px; height: 38px;
  border: 1px solid rgba(247,245,240,0.25);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--color-text-light);
  transition: all var(--transition);
}
.contact-social a:hover { background: var(--color-accent); border-color: var(--color-accent); color: var(--color-bg-dark); }

.contact-form { display: grid; gap: 20px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; }
.form-group { display: flex; flex-direction: column; gap: 8px; }
.form-group label {
  font-family: var(--font-mono);
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-muted-light);
}
.form-group input,
.form-group textarea {
  background: rgba(247,245,240,0.06);
  border: 1px solid rgba(247,245,240,0.18);
  border-radius: var(--radius);
  padding: 14px 16px;
  color: var(--color-text-light);
  font-family: var(--font-body);
  font-size: 15px;
  transition: border-color var(--transition), background var(--transition);
  width: 100%;
}
.form-group input:focus,
.form-group textarea:focus {
  border-color: var(--color-accent);
  background: rgba(247,245,240,0.1);
  outline: none;
}
.form-group textarea { resize: vertical; min-height: 140px; }
.form-msg { font-size: 14px; padding: 14px 16px; border-radius: var(--radius); display: none; }
.form-msg.success { display: block; background: rgba(47,107,79,0.18); color: #8FD6B0; border: 1px solid rgba(47,107,79,0.4); }
.form-msg.error { display: block; background: rgba(179,67,43,0.18); color: #F2A089; border: 1px solid rgba(179,67,43,0.4); }

@media (max-width: 900px) {
  .contact-grid { grid-template-columns: 1fr; }
}
@media (max-width: 560px) {
  .form-row { grid-template-columns: 1fr; }
}

/* ---------------------------------------------------------
   Footer
--------------------------------------------------------- */
.site-footer {
  background: var(--color-bg-dark);
  color: var(--color-text-muted-light);
  padding: 60px 0 26px;
  border-top: 1px solid var(--color-border-dark);
}
.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 24px;
  padding-bottom: 36px;
  margin-bottom: 26px;
  border-bottom: 1px solid var(--color-border-dark);
}
.footer-nav { display: flex; flex-wrap: wrap; gap: 24px; }
.footer-nav a { font-family: var(--font-mono); font-size: 13px; text-transform: uppercase; letter-spacing: 0.04em; }
.footer-nav a:hover { color: var(--color-accent-light); }
.footer-bottom {
  display: flex; justify-content: space-between; align-items: center;
  flex-wrap: wrap; gap: 14px;
  font-size: 13.5px;
}
.footer-bottom .made-with { font-family: var(--font-mono); font-size: 12px; }

.back-to-top {
  position: fixed;
  bottom: 28px; right: 28px;
  width: 46px; height: 46px;
  background: var(--color-accent);
  color: var(--color-bg-dark);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 24px rgba(0,0,0,0.25);
  opacity: 0; visibility: hidden;
  transform: translateY(10px);
  transition: all var(--transition);
  z-index: 900;
  border: none;
}
.back-to-top.show { opacity: 1; visibility: visible; transform: translateY(0); }
.back-to-top:hover { background: var(--color-accent-light); }

/* ---------------------------------------------------------
   Inner / Extra page (pages.php)
--------------------------------------------------------- */
.page-banner {
  padding: 160px 0 70px;
  text-align: center;
}
.page-banner h1 { color: var(--color-text-light); font-size: clamp(30px, 5vw, 46px); }
.breadcrumb {
  font-family: var(--font-mono);
  font-size: 13px;
  color: var(--color-text-muted-light);
}
.breadcrumb a { color: var(--color-accent-light); }
.page-content { max-width: 800px; margin: 0 auto; }
.page-content h2, .page-content h3 { margin-top: 1.4em; }
.page-content p { color: var(--color-text); }
.page-content ul, .page-content ol { padding-left: 22px; margin-bottom: 1em; }
.page-content li { list-style: disc; margin-bottom: 6px; }
.page-content ol li { list-style: decimal; }

.empty-state {
  text-align: center;
  padding: 40px 20px;
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 14px;
}
.on-dark .empty-state { color: var(--color-text-muted-light); }

/* ---------------------------------------------------------
   Reveal animation (JS toggles .in-view)
--------------------------------------------------------- */
.reveal { opacity: 0; transform: translateY(28px); transition: opacity 0.7s ease, transform 0.7s ease; }
.reveal.in-view { opacity: 1; transform: translateY(0); }
@keyframes fadeUp { from { opacity: 0; transform: translateY(16px);} to { opacity: 1; transform: translateY(0);} }

/* ---------------------------------------------------------
   404
--------------------------------------------------------- */
.error-page {
  min-height: 80vh;
  display: flex; flex-direction: column;
  align-items: center; justify-content: center;
  text-align: center;
  padding: 140px 20px 60px;
}
.error-page .code {
  font-family: var(--font-display);
  font-size: clamp(70px, 14vw, 140px);
  color: var(--color-accent);
  line-height: 1;
}

/* ---------------------------------------------------------
   Responsive: section padding
--------------------------------------------------------- */
@media (max-width: 768px) {
  section { padding: 70px 0; }
  .section-head { margin-bottom: 40px; }
}