/* ═══════════════════════════════════════════════════
   ASHIK DEWAN — Portfolio Stylesheet
   style.css · v2.0
   ═══════════════════════════════════════════════════ */

/* ─── IMPORTS ─── */
@import url('https://fonts.googleapis.com/css2?family=Share+Tech+Mono&family=Rajdhani:wght@400;500;600;700&family=Exo+2:wght@300;400;600;700&display=swap');

/* ─── CSS VARIABLES ─── */
:root[data-theme="dark"] {
  --bg:       #020b18;
  --bg2:      #040f1f;
  --bg3:      #071628;
  --card:     #071e33;
  --card2:    #092540;
  --border:   #0d4a7a;
  --border2:  #1565a0;
  --accent:   #00aaff;
  --accent2:  #0077cc;
  --accent3:  #00d4ff;
  --text:     #e2f0ff;
  --text2:    #8bb8d8;
  --text3:    #5580a0;
  --glow:     rgba(0,170,255,0.18);
  --glow2:    rgba(0,170,255,0.06);
  --success:  #22ff88;
}

:root[data-theme="light"] {
  --bg:       #edf4fc;
  --bg2:      #ddeeff;
  --bg3:      #cfe3f5;
  --card:     #ffffff;
  --card2:    #f0f8ff;
  --border:   #90c4e8;
  --border2:  #5aaad8;
  --accent:   #0055aa;
  --accent2:  #0077cc;
  --accent3:  #006bcc;
  --text:     #0a1f38;
  --text2:    #2c5a80;
  --text3:    #6090b8;
  --glow:     rgba(0,85,170,0.12);
  --glow2:    rgba(0,85,170,0.04);
  --success:  #1a9e5a;
}

/* ─── RESET & BASE ─── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: 'Exo 2', sans-serif;
  background: var(--bg);
  color: var(--text);
  overflow-x: hidden;
  transition: background 0.4s, color 0.4s;
}

/* ─── TYPOGRAPHY ─── */
h1, h2, h3, h4, h5, h6 { font-family: 'Rajdhani', sans-serif; }
.mono { font-family: 'Share Tech Mono', monospace; }

/* ─── BACKGROUND CANVAS ─── */
#net-canvas {
  position: fixed; top: 0; left: 0;
  width: 100%; height: 100%;
  pointer-events: none; z-index: 0;
  opacity: 0.45;
}

/* ─── SCROLLBAR ─── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg2); }
::-webkit-scrollbar-thumb { background: var(--accent2); border-radius: 3px; }

/* ══════════════════════════════════════════
   NAVBAR
   ══════════════════════════════════════════ */
#mainNav {
  position: fixed; top: 0; width: 100%; z-index: 1000;
  background: rgba(2,11,24,0.88);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border);
  transition: background 0.4s, border-color 0.4s;
  padding: 0 2rem;
  height: 64px;
}
[data-theme="light"] #mainNav {
  background: rgba(220,238,255,0.9);
}

.nav-brand {
  font-family: 'Share Tech Mono', monospace;
  font-size: 1.05rem;
  color: var(--accent) !important;
  letter-spacing: 2px;
  line-height: 1.1;
  text-decoration: none;
}
.nav-brand small {
  display: block;
  font-size: 0.65rem;
  color: var(--text3);
  letter-spacing: 1.5px;
}

.navbar-nav .nav-link {
  font-family: 'Rajdhani', sans-serif;
  font-weight: 600;
  font-size: 0.85rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  color: var(--text2) !important;
  padding: 0.4rem 0.9rem !important;
  position: relative;
  transition: color 0.2s;
}
.navbar-nav .nav-link::after {
  content: '';
  position: absolute; bottom: -2px; left: 0.9rem;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width 0.3s;
}
.navbar-nav .nav-link:hover { color: var(--accent) !important; }
.navbar-nav .nav-link:hover::after { width: calc(100% - 1.8rem); }

.navbar-toggler {
  border: 1px solid var(--border);
  background: var(--card);
  padding: 4px 10px;
}
.navbar-toggler-icon {
  filter: invert(1) sepia(1) saturate(5) hue-rotate(175deg);
}

/* Theme toggle btn */
.btn-theme {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 5px 14px;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.72rem;
  color: var(--accent);
  cursor: pointer;
  transition: all 0.3s;
  display: flex; align-items: center; gap: 6px;
  white-space: nowrap;
}
.btn-theme:hover {
  border-color: var(--accent);
  box-shadow: 0 0 12px var(--glow);
}

/* ══════════════════════════════════════════
   HERO
   ══════════════════════════════════════════ */
#hero {
  position: relative; z-index: 1;
  min-height: 100vh;
  display: flex; flex-direction: column; justify-content: center;
  padding: 110px 0 70px;
}

.status-badge {
  display: inline-flex; align-items: center; gap: 10px;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 7px 16px;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.72rem;
  color: var(--text2);
  margin-bottom: 1.6rem;
}
.status-dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--success);
  animation: pulse 2s ease-in-out infinite;
  flex-shrink: 0;
}

.hero-eyebrow {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.78rem;
  color: var(--accent);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 1rem;
  display: flex; align-items: center; gap: 12px;
}
.hero-eyebrow::before {
  content: '';
  display: inline-block;
  width: 36px; height: 1px;
  background: var(--accent);
}

.hero-title {
  font-family: 'Rajdhani', sans-serif;
  font-size: clamp(3.2rem, 9vw, 7rem);
  font-weight: 700;
  line-height: 0.95;
  letter-spacing: -1px;
  color: var(--text);
}
.hero-title .accent { color: var(--accent); }

.hero-sub {
  font-size: clamp(0.95rem, 2.2vw, 1.25rem);
  font-weight: 300;
  color: var(--text2);
  max-width: 580px;
  line-height: 1.75;
  margin-top: 1.2rem;
}

/* ─── Stat Counters ─── */
.hero-stats { margin-top: 2.5rem; }
.stat-item { display: flex; flex-direction: column; }
.stat-num {
  font-family: 'Rajdhani', sans-serif;
  font-size: 2.4rem;
  font-weight: 700;
  color: var(--accent);
  line-height: 1;
}
.stat-label {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.65rem;
  color: var(--text3);
  letter-spacing: 1.5px;
  margin-top: 4px;
}

/* ─── Hero Buttons ─── */
.btn-primary-custom {
  padding: 12px 30px;
  background: var(--accent);
  color: #020b18 !important;
  font-family: 'Rajdhani', sans-serif;
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  border: none;
  border-radius: 4px;
  text-decoration: none;
  display: inline-block;
  transition: all 0.3s;
  box-shadow: 0 0 22px var(--glow);
}
.btn-primary-custom:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 36px rgba(0,170,255,0.45);
}

.btn-outline-custom {
  padding: 12px 30px;
  background: transparent;
  color: var(--accent) !important;
  font-family: 'Rajdhani', sans-serif;
  font-weight: 700;
  font-size: 0.9rem;
  letter-spacing: 1.5px;
  text-transform: uppercase;
  border: 1px solid var(--accent);
  border-radius: 4px;
  text-decoration: none;
  display: inline-block;
  transition: all 0.3s;
}
.btn-outline-custom:hover {
  background: var(--glow2);
  transform: translateY(-2px);
}

/* ─── Scroll indicator ─── */
.scroll-hint {
  position: absolute; bottom: 30px; left: 50%;
  transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.62rem; color: var(--text3);
  letter-spacing: 2px; text-transform: uppercase;
  animation: fadeUp 1s ease 1.2s both;
}
.scroll-arrow {
  width: 1px; height: 36px;
  background: linear-gradient(to bottom, var(--accent), transparent);
  animation: scrollPulse 1.8s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { transform: scaleY(1); opacity: 1; }
  50% { transform: scaleY(0.5); opacity: 0.4; }
}

/* ══════════════════════════════════════════
   SECTION COMMONS
   ══════════════════════════════════════════ */
.site-section {
  position: relative; z-index: 1;
  padding: 90px 0;
}
.section-alt {
  background: var(--bg2);
  border-top: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
}

.section-eyebrow {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.72rem;
  color: var(--accent);
  letter-spacing: 3px;
  text-transform: uppercase;
  margin-bottom: 0.5rem;
}
.section-eyebrow::before { content: '// '; }

.section-title {
  font-family: 'Rajdhani', sans-serif;
  font-size: clamp(1.8rem, 4vw, 2.8rem);
  font-weight: 700;
  color: var(--text);
  margin-bottom: 0;
}

.section-rule {
  width: 56px; height: 2px;
  background: linear-gradient(to right, var(--accent), transparent);
  margin-top: 1rem;
}

/* ══════════════════════════════════════════
   ABOUT
   ══════════════════════════════════════════ */
.about-text {
  font-size: 0.98rem;
  color: var(--text2);
  line-height: 1.9;
}
.about-text p + p { margin-top: 1rem; }

.info-card {
  display: flex; align-items: center; gap: 1rem;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 18px;
  margin-bottom: 0.9rem;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.info-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 16px var(--glow);
}
.info-icon { font-size: 1.2rem; color: var(--accent); width: 28px; text-align: center; }
.info-label {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.65rem;
  color: var(--text3);
  letter-spacing: 1px;
}
.info-val {
  font-family: 'Rajdhani', sans-serif;
  font-weight: 600;
  color: var(--text);
  font-size: 0.92rem;
}

/* ══════════════════════════════════════════
   SKILLS
   ══════════════════════════════════════════ */
.skill-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.6rem;
  height: 100%;
  position: relative; overflow: hidden;
  transition: all 0.35s;
  cursor: default;
}
.skill-card::before {
  content: '';
  position: absolute; top: 0; left: 0;
  width: 3px; height: 100%;
  background: var(--accent);
  transform: scaleY(0); transform-origin: bottom;
  transition: transform 0.3s;
}
.skill-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 28px var(--glow);
  transform: translateY(-5px);
}
.skill-card:hover::before { transform: scaleY(1); }

.skill-icon { font-size: 2rem; margin-bottom: 0.8rem; display: block; }
.skill-name {
  font-family: 'Rajdhani', sans-serif;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  letter-spacing: 0.5px;
}
.skill-bar-wrap {
  margin-top: 0.9rem;
  background: var(--bg3);
  border-radius: 2px;
  height: 3px;
  overflow: hidden;
}
.skill-bar {
  height: 3px; border-radius: 2px;
  background: linear-gradient(to right, var(--accent2), var(--accent3));
  transform-origin: left;
  animation: barGrow 1.4s ease forwards;
}
.skill-pct {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.65rem;
  color: var(--accent);
  margin-top: 6px;
}

/* Courses */
.course-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1.1rem 1.3rem;
  height: 100%;
  transition: all 0.3s;
}
.course-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 14px var(--glow);
}
.course-title {
  font-family: 'Rajdhani', sans-serif;
  font-weight: 700;
  color: var(--text);
  font-size: 0.95rem;
}
.course-source {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.68rem;
  color: var(--accent);
  margin-top: 5px;
}

/* ══════════════════════════════════════════
   EXPERIENCE / TIMELINE
   ══════════════════════════════════════════ */
.timeline-wrap {
  position: relative;
  padding-left: 2.4rem;
}
.timeline-wrap::before {
  content: '';
  position: absolute; left: 6px; top: 0; bottom: 0;
  width: 1px;
  background: linear-gradient(to bottom, var(--accent), transparent);
}

.tl-item { position: relative; margin-bottom: 2.8rem; }
.tl-dot {
  position: absolute;
  left: -2.4rem; top: 8px;
  width: 14px; height: 14px;
  border-radius: 50%;
  border: 2px solid var(--accent);
  background: var(--bg);
  box-shadow: 0 0 10px var(--glow);
}
.tl-dot::after {
  content: '';
  position: absolute; top: 50%; left: 50%;
  transform: translate(-50%,-50%);
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--accent);
}

.tl-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 1.5rem 1.8rem;
  transition: border-color 0.3s, box-shadow 0.3s;
}
.tl-card:hover {
  border-color: var(--accent);
  box-shadow: 0 4px 24px var(--glow);
}

.tl-role {
  font-family: 'Rajdhani', sans-serif;
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--text);
}
.tl-company {
  font-size: 0.85rem;
  color: var(--accent);
  margin-top: 2px;
}
.tl-period {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.7rem;
  color: var(--text3);
  background: var(--bg3);
  border: 1px solid var(--border);
  padding: 4px 10px;
  border-radius: 3px;
  white-space: nowrap;
  align-self: flex-start;
}
.tl-location {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.68rem;
  color: var(--text3);
  margin: 0.6rem 0 0.9rem;
}

.tl-bullets { list-style: none; padding: 0; margin: 0; }
.tl-bullets li {
  font-size: 0.87rem;
  color: var(--text2);
  padding-left: 1.3rem;
  position: relative;
  line-height: 1.65;
  margin-bottom: 0.4rem;
}
.tl-bullets li::before {
  content: '▸';
  position: absolute; left: 0;
  color: var(--accent);
}

/* ══════════════════════════════════════════
   NETWORK SECTION
   ══════════════════════════════════════════ */
.net-feature {
  display: flex; gap: 1rem; align-items: flex-start;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 1rem 1.2rem;
  margin-bottom: 1rem;
  transition: all 0.3s;
}
.net-feature:hover {
  border-color: var(--accent);
  box-shadow: 0 0 14px var(--glow);
}
.net-feat-icon { font-size: 1.4rem; color: var(--accent); min-width: 34px; text-align: center; }
.net-feat-title {
  font-family: 'Rajdhani', sans-serif;
  font-weight: 700;
  color: var(--text);
  font-size: 1rem;
}
.net-feat-desc {
  font-size: 0.8rem;
  color: var(--text2);
  margin-top: 2px;
  line-height: 1.5;
}

#topology-canvas {
  width: 100%; height: 400px;
  display: block;
  border-radius: 10px;
  border: 1px solid var(--border);
  background: var(--card);
}

/* ══════════════════════════════════════════
   BLOG
   ══════════════════════════════════════════ */
.blog-card {
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 10px;
  overflow: hidden;
  height: 100%;
  transition: all 0.35s;
  cursor: pointer;
}
.blog-card:hover {
  border-color: var(--accent);
  box-shadow: 0 6px 30px var(--glow);
  transform: translateY(-6px);
}
.blog-thumb {
  height: 160px;
  background: linear-gradient(135deg, var(--bg3), var(--card2));
  display: flex; align-items: center; justify-content: center;
  font-size: 3.2rem;
  border-bottom: 1px solid var(--border);
  position: relative; overflow: hidden;
}
.blog-thumb::after {
  content: '';
  position: absolute; inset: 0;
  background: linear-gradient(135deg, transparent 60%, var(--glow));
}

.blog-body { padding: 1.4rem; }
.blog-tag {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.62rem;
  color: var(--accent);
  letter-spacing: 2px;
  text-transform: uppercase;
  background: var(--glow2);
  border: 1px solid var(--border);
  padding: 3px 9px;
  border-radius: 2px;
  display: inline-block;
  margin-bottom: 0.8rem;
}
.blog-title {
  font-family: 'Rajdhani', sans-serif;
  font-weight: 700;
  font-size: 1.05rem;
  color: var(--text);
  margin-bottom: 0.5rem;
  line-height: 1.4;
}
.blog-excerpt {
  font-size: 0.82rem;
  color: var(--text2);
  line-height: 1.6;
}
.blog-meta {
  display: flex; justify-content: space-between;
  margin-top: 1rem;
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.65rem;
  color: var(--text3);
}

/* ══════════════════════════════════════════
   CONTACT
   ══════════════════════════════════════════ */
.contact-card {
  display: flex; gap: 1rem; align-items: center;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 8px;
  padding: 14px 18px;
  margin-bottom: 1rem;
  transition: all 0.3s;
}
.contact-card:hover {
  border-color: var(--accent);
  box-shadow: 0 0 14px var(--glow);
}
.contact-icon { font-size: 1.2rem; color: var(--accent); width: 28px; text-align: center; }
.contact-label {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.65rem;
  color: var(--text3);
}
.contact-val {
  font-family: 'Rajdhani', sans-serif;
  font-weight: 600;
  color: var(--text);
  font-size: 0.92rem;
}

/* ─── Form ─── */
.form-label-custom {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.7rem;
  color: var(--accent);
  letter-spacing: 1px;
  margin-bottom: 5px;
  display: block;
}
.form-control-custom {
  width: 100%;
  background: var(--card);
  border: 1px solid var(--border);
  border-radius: 5px;
  padding: 11px 14px;
  color: var(--text);
  font-family: 'Exo 2', sans-serif;
  font-size: 0.9rem;
  outline: none;
  transition: all 0.3s;
  resize: vertical;
}
.form-control-custom::placeholder { color: var(--text3); }
.form-control-custom:focus {
  border-color: var(--accent);
  box-shadow: 0 0 12px var(--glow);
  background: var(--card2);
}
textarea.form-control-custom { min-height: 130px; }

.btn-send {
  width: 100%;
  padding: 14px;
  background: linear-gradient(135deg, var(--accent2), var(--accent));
  border: none;
  border-radius: 5px;
  font-family: 'Rajdhani', sans-serif;
  font-weight: 700;
  font-size: 1rem;
  letter-spacing: 2px;
  text-transform: uppercase;
  color: #020b18;
  cursor: pointer;
  transition: all 0.3s;
  box-shadow: 0 0 22px var(--glow);
  margin-top: 0.5rem;
}
.btn-send:hover {
  transform: translateY(-2px);
  box-shadow: 0 0 38px rgba(0,170,255,0.5);
}
.btn-send.sent {
  background: linear-gradient(135deg, #0a6b3a, #22ff88);
}

/* ══════════════════════════════════════════
   FOOTER
   ══════════════════════════════════════════ */
#siteFooter {
  position: relative; z-index: 1;
  background: var(--bg2);
  border-top: 1px solid var(--border);
  padding: 2rem 0;
}
.footer-logo {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.9rem;
  color: var(--accent);
}
.footer-copy {
  font-family: 'Share Tech Mono', monospace;
  font-size: 0.68rem;
  color: var(--text3);
}
.social-link {
  width: 38px; height: 38px;
  border-radius: 50%;
  background: var(--card);
  border: 1px solid var(--border);
  display: inline-flex; align-items: center; justify-content: center;
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--text2);
  transition: all 0.3s;
  margin-left: 6px;
}
.social-link:hover {
  border-color: var(--accent);
  color: var(--accent);
  box-shadow: 0 0 12px var(--glow);
}

/* ══════════════════════════════════════════
   ANIMATIONS
   ══════════════════════════════════════════ */
@keyframes pulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.3; transform: scale(1.4); }
}
@keyframes barGrow {
  from { transform: scaleX(0); }
  to   { transform: scaleX(1); }
}
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(22px); }
  to   { opacity: 1; transform: translateY(0); }
}

.anim-fade-up { animation: fadeUp 0.75s ease both; }
.anim-delay-1 { animation-delay: 0.1s; }
.anim-delay-2 { animation-delay: 0.25s; }
.anim-delay-3 { animation-delay: 0.4s; }
.anim-delay-4 { animation-delay: 0.55s; }
.anim-delay-5 { animation-delay: 0.7s; }
.anim-delay-6 { animation-delay: 0.85s; }