/* =====================================================
   MOURAD HAMZAOUI – AI Portfolio
   Theme: Dark Tech / Industrial Precision
   Fonts: Syne (Display) + IBM Plex Mono + Inter
   ===================================================== */

:root {
  --bg:        #080a0f;
  --bg2:       #0d1117;
  --bg3:       #111827;
  --surface:   #161d2c;
  --surface2:  #1e2738;
  --border:    rgba(255,255,255,0.07);
  --border2:   rgba(255,255,255,0.12);
  --accent:    #00e5ff;
  --accent2:   #7c3aed;
  --accent3:   #f59e0b;
  --text:      #e8eaf0;
  --text2:     #9aa3b2;
  --text3:     #5c6880;
  --radius:    12px;
  --radius-lg: 20px;
  --glow:      0 0 30px rgba(0,229,255,0.15);
  --glow-lg:   0 0 60px rgba(0,229,255,0.12);
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  background: var(--bg);
  color: var(--text);
  font-family: 'Inter', sans-serif;
  font-size: 15px;
  line-height: 1.7;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* NOISE OVERLAY */
.noise {
  position: fixed; inset: 0; pointer-events: none; z-index: 999;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  opacity: 0.4;
}

/* UTILITY */
.container { max-width: 1200px; margin: 0 auto; padding: 0 2rem; }
.dot { color: var(--accent); }

/* =====================
   NAVBAR
   ===================== */
#navbar {
  position: fixed; top: 0; left: 0; right: 0; z-index: 100;
  display: flex; align-items: center; justify-content: space-between;
  padding: 1rem 2.5rem;
  background: rgba(8, 10, 15, 0.7);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: all 0.3s ease;
}
#navbar.scrolled {
  padding: 0.75rem 2.5rem;
  background: rgba(8, 10, 15, 0.95);
}
.nav-logo {
  font-family: 'Syne', sans-serif;
  font-weight: 800; font-size: 1.4rem;
  letter-spacing: -0.02em; color: var(--text);
}
.nav-links { display: flex; gap: 2.5rem; list-style: none; }
.nav-links a {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.78rem; font-weight: 400;
  color: var(--text2); text-decoration: none;
  letter-spacing: 0.05em; text-transform: uppercase;
  transition: color 0.2s;
}
.nav-links a:hover { color: var(--accent); }
.hamburger { display: none; flex-direction: column; gap: 5px; cursor: pointer; }
.hamburger span { width: 24px; height: 1.5px; background: var(--text2); display: block; transition: all 0.3s; }

/* =====================
   HERO
   ===================== */
.hero {
  min-height: 100vh;
  display: flex; align-items: center;
  padding: 6rem 2rem 4rem;
  position: relative; overflow: hidden;
}
.hero-bg-grid {
  position: absolute; inset: 0; pointer-events: none;
  background-image:
    linear-gradient(rgba(0,229,255,0.03) 1px, transparent 1px),
    linear-gradient(90deg, rgba(0,229,255,0.03) 1px, transparent 1px);
  background-size: 60px 60px;
  mask-image: radial-gradient(ellipse at 60% 40%, black 30%, transparent 70%);
}
.hero::before {
  content: '';
  position: absolute;
  top: -200px; right: -200px;
  width: 700px; height: 700px;
  background: radial-gradient(circle, rgba(0,229,255,0.06) 0%, transparent 70%);
  pointer-events: none;
}
.hero::after {
  content: '';
  position: absolute;
  bottom: -200px; left: -100px;
  width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(124,58,237,0.05) 0%, transparent 70%);
  pointer-events: none;
}
.hero-content {
  flex: 1; max-width: 620px;
  animation: fadeUp 0.9s ease both;
}
.hero-badge {
  display: inline-flex; align-items: center; gap: 0.5rem;
  font-family: 'IBM Plex Mono', monospace; font-size: 0.7rem;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--accent); border: 1px solid rgba(0,229,255,0.25);
  padding: 0.35rem 0.85rem; border-radius: 100px;
  margin-bottom: 1.5rem; backdrop-filter: blur(8px);
  background: rgba(0,229,255,0.05);
}
.badge-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--accent);
  animation: pulse 2s ease-in-out infinite;
}
.hero-title {
  font-family: 'Syne', sans-serif;
  font-weight: 800;
  line-height: 0.9;
  margin-bottom: 1rem;
}
.hero-title .line-1 {
  display: block;
  font-size: clamp(3.5rem, 8vw, 6.5rem);
  color: var(--text);
  letter-spacing: -0.03em;
}
.hero-title .line-2 {
  display: block;
  font-size: clamp(3.5rem, 8vw, 6.5rem);
  letter-spacing: -0.03em;
  color: transparent;
  -webkit-text-stroke: 1px rgba(255,255,255,0.25);
  background: linear-gradient(90deg, var(--accent), var(--accent2));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-sub {
  font-family: 'IBM Plex Mono', monospace;
  font-size: 0.9rem; color: var(--accent);
  letter-spacing: 0.08em; text-transform: uppercase;
  margin-bottom: 1.25rem;
}
.hero-desc {
  font-size: 1.05rem; color: var(--text2);
  line-height: 1.75; max-width: 520px;
  margin-bottom: 2rem;
}
.hero-desc em { color: var(--text); font-style: normal; font-weight: 500; }

.hero-cta { display: flex; gap: 1rem; flex-wrap: wrap; margin-bottom: 3rem; }
.btn {
  display: inline-flex; align-items: center; gap: 0.5rem;
  padding: 0.8rem 2rem; border-radius: 100px;
  font-family: 'IBM Plex Mono', monospace; font-size: 0.78rem;
  font-weight: 500; letter-spacing: 0.05em; text-transform: uppercase;
  text-decoration: none; transition: all 0.25s ease; cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--accent); color: var(--bg);
  box-shadow: 0 0 20px rgba(0,229,255,0.3);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 35px rgba(0,229,255,0.5);
}
.btn-ghost {
  background: transparent; color: var(--text2);
  border: 1px solid var(--border2);
}
.btn-ghost:hover { color: var(--accent); border-color: var(--accent); }

.hero-stats { display: flex; align-items: center; gap: 2rem; }
.stat { display: flex; flex-direction: column; }
.stat-num {
  font-family: 'Syne', sans-serif; font-weight: 800;
  font-size: 2rem; color: var(--text); line-height: 1;
}
.stat-label {
  font-family: 'IBM Plex Mono', monospace; font-size: 0.65rem;
  color: var(--text3); letter-spacing: 0.05em; text-transform: uppercase;
  margin-top: 0.25rem;
}
.stat-div { width: 1px; height: 40px; background: var(--border2); }

/* HERO VISUAL */
.hero-visual {
  flex: 0 0 420px;
  position: relative; height: 420px;
  display: flex; align-items: center; justify-content: center;
  animation: fadeIn 1.2s ease both 0.3s;
}
.orbit-ring {
  position: absolute; border-radius: 50%; border-style: solid;
}
.ring-1 {
  width: 300px; height: 300px;
  border: 1px solid rgba(0,229,255,0.12);
  animation: spin 20s linear infinite;
}
.ring-2 {
  width: 380px; height: 380px;
  border: 1px dashed rgba(124,58,237,0.15);
  animation: spin 35s linear infinite reverse;
}
.ring-3 {
  width: 200px; height: 200px;
  border: 1px solid rgba(255,255,255,0.05);
  animation: spin 15s linear infinite;
}
.avatar-wrap {
  width: 160px; height: 160px; border-radius: 50%;
  border: 2px solid var(--accent);
  box-shadow: var(--glow);
  overflow: hidden; position: relative; z-index: 2;
}
.avatar-inner { width: 100%; height: 100%; position: relative; }
.avatar-inner img { width: 100%; height: 100%; object-fit: cover; }
.avatar-fallback {
  display: none;
  width: 100%; height: 100%;
  background: linear-gradient(135deg, var(--surface2), var(--bg3));
  align-items: center; justify-content: center;
  font-family: 'Syne', sans-serif; font-weight: 800;
  font-size: 2.5rem; color: var(--accent);
}
.orbit-dot {
  position: absolute; width: 12px; height: 12px;
  border-radius: 50%; border: 2px solid;
}
.dot-a {
  border-color: var(--accent); background: rgba(0,229,255,0.3);
  top: 20px; right: 80px;
  animation: orbitA 20s linear infinite;
}
.dot-b {
  border-color: var(--accent2); background: rgba(124,58,237,0.3);
  bottom: 60px; left: 30px;
  animation: orbitB 35s linear infinite;
}
.dot-c {
  border-color: var(--accent3); background: rgba(245,158,11,0.3);
  top: 100px; left: 20px;
  animation: orbitC 15s linear infinite;
}

/* SCROLL HINT */
.scroll-hint {
  position: absolute; bottom: 2.5rem; left: 2rem;
  display: flex; flex-direction: column; align-items: center; gap: 0.5rem;
}
.scroll-hint span {
  font-family: 'IBM Plex Mono', monospace; font-size: 0.6rem;
  color: var(--text3); letter-spacing: 0.15em; text-transform: uppercase;
  transform: rotate(-90deg);
}
.scroll-line {
  width: 1px; height: 60px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}

/* =====================
   SECTION COMMON
   ===================== */
.section-tag {
  display: inline-block;
  font-family: 'IBM Plex Mono', monospace; font-size: 0.7rem;
  letter-spacing: 0.15em; text-transform: uppercase;
  color: var(--accent); border: 1px solid rgba(0,229,255,0.2);
  padding: 0.3rem 0.8rem; border-radius: 4px;
  margin-bottom: 1rem;
}
.section-title {
  font-family: 'Syne', sans-serif; font-weight: 800;
  font-size: clamp(2rem, 4vw, 3rem);
  letter-spacing: -0.02em; color: var(--text);
  margin-bottom: 3rem;
}

/* =====================
   ABOUT
   ===================== */
.about {
  padding: 7rem 0;
  background: linear-gradient(180deg, var(--bg) 0%, var(--bg2) 100%);
}
.about-grid {
  display: grid; grid-template-columns: 1fr 1fr;
  gap: 4rem; align-items: start;
}
.about-text h2 {
  font-family: 'Syne', sans-serif; font-weight: 700;
  font-size: 2rem; color: var(--text);
  line-height: 1.2; margin-bottom: 1.25rem;
}
.about-text p {
  color: var(--text2); line-height: 1.8;
  margin-bottom: 1rem;
}
.about-langs { display: flex; gap: 0.75rem; flex-wrap: wrap; margin-top: 1.5rem; }
.lang-chip {
  padding: 0.4rem 1rem; border-radius: 100px;
  background: var(--surface); border: 1px solid var(--border2);
  font-size: 0.85rem; color: var(--text2);
}
.about-cards { display: flex; flex-direction: column; gap: 1rem; }
.info-card {
  display: flex; align-items: flex-start; gap: 1rem;
  padding: 1.25rem 1.5rem;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s, transform 0.2s;
}
.info-card:hover { border-color: var(--border2); transform: translateX(4px); }
.info-icon { font-size: 1.4rem; flex-shrink: 0; }
.info-card div { display: flex; flex-direction: column; gap: 0.2rem; }
.info-card strong { color: var(--text); font-size: 0.9rem; font-weight: 600; }
.info-card span { color: var(--text3); font-size: 0.8rem; font-family: 'IBM Plex Mono', monospace; }

/* =====================
   SKILLS
   ===================== */
.skills {
  padding: 7rem 0;
  background: var(--bg2);
  position: relative;
}
.skills::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 1px; background: linear-gradient(90deg, transparent, var(--accent), transparent);
  opacity: 0.3;
}
.skills-grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}
.skill-category {
  padding: 2rem;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
}
.skill-category:hover {
  border-color: rgba(0,229,255,0.3);
  transform: translateY(-4px);
  box-shadow: var(--glow);
}
.skill-icon { font-size: 2rem; margin-bottom: 0.75rem; }
.skill-category h3 {
  font-family: 'Syne', sans-serif; font-weight: 700;
  font-size: 1rem; color: var(--text);
  margin-bottom: 1rem;
}
.skill-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; }
.skill-tags span {
  font-family: 'IBM Plex Mono', monospace; font-size: 0.7rem;
  padding: 0.25rem 0.65rem; border-radius: 4px;
  background: var(--bg3); border: 1px solid var(--border2);
  color: var(--text2);
}

/* =====================
   PROJECTS
   ===================== */
.projects {
  padding: 7rem 0;
  background: var(--bg);
  position: relative;
}
.projects::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 1px; background: linear-gradient(90deg, transparent, var(--accent2), transparent);
  opacity: 0.3;
}

/* TOPIC HEADER */
.topic-header {
  display: flex; align-items: flex-start; gap: 1.5rem;
  margin: 4rem 0 2rem;
  padding-bottom: 1.5rem;
  border-bottom: 1px solid var(--border);
}
.topic-num {
  font-family: 'Syne', sans-serif; font-weight: 800;
  font-size: 4rem; line-height: 1;
  color: transparent;
  -webkit-text-stroke: 1px rgba(0,229,255,0.25);
  flex-shrink: 0;
}
.topic-title {
  font-family: 'Syne', sans-serif; font-weight: 700;
  font-size: 1.75rem; color: var(--text);
  margin-bottom: 0.25rem;
}
.topic-desc { color: var(--text2); font-size: 0.9rem; }

/* PROJECTS ROW */
.projects-row {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
  margin-bottom: 1rem;
}

/* PROJECT CARD */
.project-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  overflow: hidden;
  display: flex; flex-direction: column;
  transition: border-color 0.3s, transform 0.3s, box-shadow 0.3s;
}
.project-card:hover {
  border-color: rgba(0,229,255,0.3);
  transform: translateY(-6px);
  box-shadow: 0 20px 60px rgba(0,0,0,0.5), var(--glow);
}

.project-banner {
  height: 160px; position: relative;
  overflow: hidden;
}
.project-banner::after {
  content: ''; position: absolute; inset: 0;
  background: linear-gradient(to bottom, transparent 30%, rgba(0,0,0,0.6) 100%);
}
.project-banner-overlay {
  position: absolute; inset: 0; z-index: 1;
  display: flex; flex-direction: column; justify-content: flex-end;
  padding: 1.25rem;
}
.project-banner-icon { font-size: 2.5rem; margin-bottom: 0.5rem; }
.project-tag-chips { display: flex; flex-wrap: wrap; gap: 0.35rem; }
.project-tag-chips span {
  font-family: 'IBM Plex Mono', monospace; font-size: 0.65rem;
  padding: 0.2rem 0.55rem; border-radius: 100px;
  background: rgba(0,0,0,0.5); border: 1px solid rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.8); backdrop-filter: blur(4px);
}

.project-body { padding: 1.5rem; flex: 1; display: flex; flex-direction: column; gap: 0.85rem; }

.project-category-label {
  font-family: 'IBM Plex Mono', monospace; font-size: 0.65rem;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--accent);
}
.project-title {
  font-family: 'Syne', sans-serif; font-weight: 700;
  font-size: 1.05rem; color: var(--text); line-height: 1.3;
}
.project-desc { color: var(--text2); font-size: 0.875rem; line-height: 1.7; }
.project-desc strong { color: var(--accent3); font-weight: 600; }

.project-what-learn h5,
.project-arch h5 {
  font-family: 'IBM Plex Mono', monospace; font-size: 0.65rem;
  letter-spacing: 0.1em; text-transform: uppercase;
  color: var(--text3); margin-bottom: 0.5rem;
}
.project-what-learn ul {
  padding-left: 1rem; display: flex; flex-direction: column; gap: 0.3rem;
}
.project-what-learn li { font-size: 0.82rem; color: var(--text2); }

.project-arch { margin-top: auto; }
.arch-flow {
  display: flex; flex-wrap: wrap; align-items: center; gap: 0.25rem;
  padding: 0.75rem;
  background: var(--bg3); border-radius: 8px;
  border: 1px solid var(--border);
}
.arch-flow span {
  font-family: 'IBM Plex Mono', monospace; font-size: 0.65rem;
  color: var(--text2);
}
.arch-arrow { color: var(--accent3) !important; font-size: 0.85rem !important; }

.project-stack {
  display: flex; flex-wrap: wrap; gap: 0.35rem;
  margin-top: 0.5rem;
}
.project-stack span {
  font-family: 'IBM Plex Mono', monospace; font-size: 0.65rem;
  padding: 0.2rem 0.55rem; border-radius: 4px;
  background: var(--bg3); border: 1px solid var(--border2);
  color: var(--text3);
}

/* =====================
   CERTIFICATIONS
   ===================== */
.certifications {
  padding: 7rem 0;
  background: var(--bg2);
  position: relative;
}
.certifications::before {
  content: ''; position: absolute; top: 0; left: 0; right: 0;
  height: 1px; background: linear-gradient(90deg, transparent, var(--accent3), transparent);
  opacity: 0.3;
}
.cert-grid {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1rem;
}
.cert-card {
  display: flex; align-items: center; gap: 1rem;
  padding: 1.25rem;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius);
  transition: border-color 0.2s, transform 0.2s;
}
.cert-card:hover { border-color: rgba(245,158,11,0.3); transform: translateY(-3px); }
.cert-logo {
  width: 42px; height: 42px; border-radius: 8px;
  background: linear-gradient(135deg, var(--accent2), var(--bg3));
  display: flex; align-items: center; justify-content: center;
  font-family: 'Syne', sans-serif; font-weight: 800; font-size: 0.8rem;
  color: white; flex-shrink: 0;
}
.cert-info { display: flex; flex-direction: column; }
.cert-info strong { font-size: 0.8rem; color: var(--text); font-weight: 600; line-height: 1.3; }
.cert-info span { font-size: 0.7rem; color: var(--text3); font-family: 'IBM Plex Mono', monospace; margin-top: 0.15rem; }

/* =====================
   CONTACT
   ===================== */
.contact {
  padding: 7rem 0;
  background: var(--bg);
  text-align: center;
  position: relative;
}
.contact::before {
  content: '';
  position: absolute; top: -150px; left: 50%; transform: translateX(-50%);
  width: 600px; height: 300px;
  background: radial-gradient(ellipse, rgba(0,229,255,0.04) 0%, transparent 70%);
  pointer-events: none;
}
.contact-sub {
  color: var(--text2); font-size: 1rem;
  max-width: 500px; margin: -1.5rem auto 3rem;
}
.contact-links {
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 1rem; max-width: 900px; margin: 0 auto;
}
.contact-card {
  display: flex; align-items: center; gap: 1rem;
  padding: 1.5rem;
  background: var(--surface); border: 1px solid var(--border);
  border-radius: var(--radius-lg); text-decoration: none;
  text-align: left; transition: all 0.25s ease;
}
.contact-card:hover {
  border-color: rgba(0,229,255,0.3);
  transform: translateY(-4px);
  box-shadow: var(--glow);
}
.contact-icon { font-size: 1.75rem; flex-shrink: 0; }
.contact-card div { display: flex; flex-direction: column; gap: 0.15rem; }
.contact-card strong { color: var(--text); font-size: 0.85rem; display: block; }
.contact-card span { color: var(--text3); font-size: 0.72rem; font-family: 'IBM Plex Mono', monospace; }

/* =====================
   FOOTER
   ===================== */
footer {
  padding: 2rem 0;
  border-top: 1px solid var(--border);
  background: var(--bg);
}
.footer-inner {
  display: flex; align-items: center; justify-content: space-between;
  flex-wrap: wrap; gap: 1rem;
}
.footer-logo {
  font-family: 'Syne', sans-serif; font-weight: 800;
  font-size: 1.2rem;
}
footer p { color: var(--text3); font-size: 0.78rem; font-family: 'IBM Plex Mono', monospace; }
.footer-links { display: flex; gap: 1.5rem; }
.footer-links a {
  color: var(--text3); text-decoration: none;
  font-family: 'IBM Plex Mono', monospace; font-size: 0.72rem;
  transition: color 0.2s;
}
.footer-links a:hover { color: var(--accent); }

/* =====================
   ANIMATIONS
   ===================== */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes spin {
  from { transform: rotate(0deg); }
  to   { transform: rotate(360deg); }
}
@keyframes pulse {
  0%,100% { transform: scale(1); opacity: 1; }
  50%      { transform: scale(1.5); opacity: 0.5; }
}
@keyframes scrollPulse {
  0%,100% { opacity: 0.3; }
  50%      { opacity: 1; }
}
@keyframes orbitA {
  from { transform: rotate(0deg) translateX(140px) rotate(0deg); }
  to   { transform: rotate(360deg) translateX(140px) rotate(-360deg); }
}
@keyframes orbitB {
  from { transform: rotate(0deg) translateX(175px) rotate(0deg); }
  to   { transform: rotate(-360deg) translateX(175px) rotate(360deg); }
}
@keyframes orbitC {
  from { transform: rotate(180deg) translateX(95px) rotate(-180deg); }
  to   { transform: rotate(540deg) translateX(95px) rotate(-540deg); }
}

/* Scroll reveal */
.reveal {
  opacity: 0; transform: translateY(24px);
  transition: opacity 0.7s ease, transform 0.7s ease;
}
.reveal.visible { opacity: 1; transform: translateY(0); }
.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }

/* =====================
   RESPONSIVE
   ===================== */
@media (max-width: 1100px) {
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-row { grid-template-columns: repeat(2, 1fr); }
  .cert-grid { grid-template-columns: repeat(2, 1fr); }
  .contact-links { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 820px) {
  .hero { flex-direction: column; padding-top: 8rem; gap: 3rem; }
  .hero-visual { display: none; }
  .about-grid { grid-template-columns: 1fr; }
  .projects-row { grid-template-columns: 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .nav-links { display: none; }
  .hamburger { display: flex; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: absolute; top: 100%; left: 0; right: 0;
    background: rgba(8,10,15,0.98);
    padding: 2rem; gap: 1.5rem;
    border-bottom: 1px solid var(--border);
  }
}

@media (max-width: 600px) {
  .cert-grid { grid-template-columns: 1fr; }
  .contact-links { grid-template-columns: 1fr; }
  .hero-stats { flex-direction: column; gap: 1rem; }
  .stat-div { width: 40px; height: 1px; }
  .footer-inner { flex-direction: column; text-align: center; }
  .topic-header { flex-direction: column; gap: 0.5rem; }
  .topic-num { font-size: 2.5rem; }
}