/* ===================================================================
   MUHAMMAD SAIM BIN ZAHID — PORTFOLIO
   Theme: dark, modern, developer-workspace inspired
   Fonts: Space Grotesk (display), Inter (body), JetBrains Mono (code/labels)
=================================================================== */

:root {
  /* Color tokens */
  --bg-base:      #0a0e0f;
  --bg-elevated:  #11161a;
  --bg-card:      #161c20;
  --border-subtle:#232b30;
  --text-primary: #eef2f1;
  --text-secondary: #9aa6a3;
  --text-muted:   #5f6b69;
  --accent:       #5eead4;   /* teal/mint — signature color */
  --accent-dim:   #2f6e63;
  --accent-glow:  rgba(94, 234, 212, 0.18);

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

  /* Layout */
  --max-width: 1180px;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 20px;
}

* { margin: 0; padding: 0; 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; }
}

body {
  background: var(--bg-base);
  color: var(--text-primary);
  font-family: var(--font-body);
  line-height: 1.6;
  overflow-x: hidden;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; }

::selection { background: var(--accent); color: var(--bg-base); }

/* ---------- Custom cursor dot (subtle, desktop) ---------- */
.cursor-dot {
  position: fixed;
  width: 8px; height: 8px;
  border-radius: 50%;
  background: var(--accent);
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: opacity 0.2s ease;
  opacity: 0;
  box-shadow: 0 0 12px var(--accent-glow);
}
@media (hover: hover) and (pointer: fine) {
  .cursor-dot { opacity: 0.7; }
}

/* ---------- Section scaffolding ---------- */
.section-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 100px 32px;
}

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.12em;
  color: var(--accent);
  margin-bottom: 16px;
  text-transform: uppercase;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(1.9rem, 4vw, 2.75rem);
  font-weight: 600;
  margin-bottom: 16px;
  letter-spacing: -0.01em;
}

.section-subtitle {
  color: var(--text-secondary);
  font-size: 1.02rem;
  max-width: 640px;
  margin-bottom: 48px;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 14px 28px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 0.92rem;
  font-weight: 500;
  border: 1px solid transparent;
  transition: all 0.25s ease;
  white-space: nowrap;
}

.btn-primary {
  background: var(--accent);
  color: var(--bg-base);
}
.btn-primary:hover {
  background: #7ff3e0;
  box-shadow: 0 0 24px var(--accent-glow);
  transform: translateY(-2px);
}

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

.btn-full { width: 100%; }

/* ===================================================================
   NAVBAR
=================================================================== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  background: rgba(10, 14, 15, 0.75);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--border-subtle);
}

.nav-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 18px 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.logo {
  font-family: var(--font-mono);
  font-size: 1.05rem;
  font-weight: 600;
  letter-spacing: 0.02em;
}
.logo-bracket { color: var(--accent); }

.nav-links {
  display: flex;
  gap: 36px;
}
.nav-links a {
  font-family: var(--font-mono);
  font-size: 0.88rem;
  color: var(--text-secondary);
  position: relative;
  transition: color 0.2s ease;
}
.nav-links a:hover { color: var(--text-primary); }
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -6px; left: 0;
  width: 0; height: 1px;
  background: var(--accent);
  transition: width 0.25s ease;
}
.nav-links a:hover::after { width: 100%; }

.nav-cta {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  border: 1px solid var(--border-subtle);
  padding: 9px 18px;
  border-radius: var(--radius-sm);
  transition: all 0.25s ease;
}
.nav-cta:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
}
.nav-toggle span {
  width: 24px; height: 2px;
  background: var(--text-primary);
  transition: all 0.3s ease;
}

/* ===================================================================
   HERO
=================================================================== */
.hero {
  position: relative;
  min-height: 100vh;
  display: flex;
  align-items: center;
  padding: 120px 32px 80px;
  overflow: hidden;
}

.hero-bg-grid {
  position: absolute;
  inset: 0;
  background-image:
    linear-gradient(var(--border-subtle) 1px, transparent 1px),
    linear-gradient(90deg, var(--border-subtle) 1px, transparent 1px);
  background-size: 64px 64px;
  mask-image: radial-gradient(ellipse 80% 60% at 50% 30%, black 30%, transparent 75%);
  opacity: 0.5;
  pointer-events: none;
}

.hero-inner {
  position: relative;
  max-width: var(--max-width);
  margin: 0 auto;
  width: 100%;
  display: grid;
  grid-template-columns: 1.3fr 0.7fr;
  gap: 60px;
  align-items: center;
}

.hero-eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 9px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-secondary);
  border: 1px solid var(--border-subtle);
  padding: 7px 14px;
  border-radius: 100px;
  margin-bottom: 28px;
}

.status-dot {
  width: 7px; height: 7px;
  border-radius: 50%;
  background: var(--accent);
  box-shadow: 0 0 8px var(--accent);
  animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.4; }
}

.hero-title {
  font-family: var(--font-display);
  font-size: clamp(2.6rem, 6vw, 4.4rem);
  font-weight: 700;
  line-height: 1.05;
  letter-spacing: -0.02em;
  margin-bottom: 20px;
}
.hero-title-accent { color: var(--accent); }

.hero-role {
  font-family: var(--font-mono);
  font-size: clamp(1.05rem, 2vw, 1.3rem);
  color: var(--text-secondary);
  margin-bottom: 24px;
  min-height: 1.6em;
}
.cursor-blink {
  color: var(--accent);
  animation: blink 1s step-end infinite;
}
@keyframes blink { 50% { opacity: 0; } }

.hero-bio {
  font-size: 1.05rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin-bottom: 36px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  margin-bottom: 36px;
  flex-wrap: wrap;
}

.hero-meta {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-muted);
  flex-wrap: wrap;
}
.meta-divider { color: var(--border-subtle); }

.hero-photo-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 14px;
}

.hero-photo-frame {
  width: 100%;
  max-width: 320px;
  aspect-ratio: 1 / 1.05;
  border-radius: var(--radius-lg);
  border: 1px solid var(--border-subtle);
  background: var(--bg-elevated);
  overflow: hidden;
  position: relative;
}
.hero-photo-frame::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(circle at 50% 0%, var(--accent-glow), transparent 70%);
  z-index: 1;
}
.hero-photo {
  width: 100%; height: 100%;
  object-fit: cover;
  filter: grayscale(0.3) contrast(1.05);
}

.hero-photo-tag {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  color: var(--text-muted);
}

.scroll-cue {
  position: absolute;
  bottom: 36px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-muted);
  letter-spacing: 0.1em;
  text-transform: uppercase;
}
.scroll-line {
  width: 1px; height: 36px;
  background: linear-gradient(var(--text-muted), transparent);
  animation: scrollMove 2s ease-in-out infinite;
}
@keyframes scrollMove {
  0% { transform: scaleY(0); transform-origin: top; }
  50% { transform: scaleY(1); transform-origin: top; }
  51% { transform-origin: bottom; }
  100% { transform: scaleY(0); transform-origin: bottom; }
}

/* ===================================================================
   ABOUT
=================================================================== */
.about-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 56px;
  align-items: start;
  margin-bottom: 56px;
}

.about-text {
  font-size: 1.05rem;
  color: var(--text-secondary);
}

.about-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.stat-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 22px;
  display: flex;
  flex-direction: column;
  gap: 6px;
  transition: border-color 0.25s ease;
}
.stat-card:hover { border-color: var(--accent-dim); }

.stat-number {
  font-family: var(--font-display);
  font-size: 2rem;
  font-weight: 700;
  color: var(--accent);
}
.stat-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
}

.cv-box {
  background: linear-gradient(135deg, var(--bg-card), var(--bg-elevated));
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 32px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 24px;
  flex-wrap: wrap;
}
.cv-box-text h3 {
  font-family: var(--font-display);
  font-size: 1.2rem;
  margin-bottom: 6px;
}
.cv-box-text p {
  color: var(--text-secondary);
  font-size: 0.95rem;
}

.cv-note {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-muted);
  margin-top: 12px;
}
.cv-note code {
  background: var(--bg-elevated);
  padding: 2px 6px;
  border-radius: 4px;
  color: var(--accent);
}

/* ===================================================================
   SKILLS
=================================================================== */
.skills { background: var(--bg-elevated); }

.skills-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.skill-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  padding: 30px 26px;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.skill-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-dim);
}

.skill-icon { font-size: 1.7rem; margin-bottom: 16px; }

.skill-card h3 {
  font-family: var(--font-display);
  font-size: 1.08rem;
  margin-bottom: 8px;
}
.skill-card p {
  color: var(--text-secondary);
  font-size: 0.92rem;
}

/* ===================================================================
   PROJECTS
=================================================================== */
.projects-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.project-card {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: transform 0.25s ease, border-color 0.25s ease;
}
.project-card:hover {
  transform: translateY(-4px);
  border-color: var(--accent-dim);
}

.project-image {
  height: 160px;
  background:
    linear-gradient(135deg, var(--bg-elevated), var(--bg-base));
  display: flex;
  align-items: center;
  justify-content: center;
  border-bottom: 1px solid var(--border-subtle);
  position: relative;
}
.project-image span {
  font-family: var(--font-mono);
  font-size: 3rem;
  font-weight: 600;
  color: var(--border-subtle);
}

.project-body { padding: 26px; }

.project-body h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin-bottom: 10px;
}
.project-body p {
  color: var(--text-secondary);
  font-size: 0.93rem;
  margin-bottom: 18px;
}

.project-tags {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  margin-bottom: 18px;
}
.project-tags span {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--accent);
  background: var(--accent-glow);
  padding: 4px 10px;
  border-radius: 100px;
}

.project-links {
  display: flex;
  gap: 18px;
}
.project-link {
  font-family: var(--font-mono);
  font-size: 0.85rem;
  color: var(--text-secondary);
  transition: color 0.2s ease;
}
.project-link:hover { color: var(--accent); }

/* ===================================================================
   EXPERIENCE / TIMELINE
=================================================================== */
.experience { background: var(--bg-elevated); }

.timeline {
  position: relative;
  padding-left: 32px;
  border-left: 1px solid var(--border-subtle);
}

.timeline-item {
  position: relative;
  padding-bottom: 44px;
}
.timeline-item:last-child { padding-bottom: 0; }

.timeline-dot {
  position: absolute;
  left: -37px;
  top: 4px;
  width: 11px; height: 11px;
  border-radius: 50%;
  background: var(--bg-elevated);
  border: 2px solid var(--accent);
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--accent);
}

.timeline-content h3 {
  font-family: var(--font-display);
  font-size: 1.15rem;
  margin: 6px 0 10px;
  display: flex;
  align-items: center;
  gap: 10px;
  flex-wrap: wrap;
}

.timeline-tag {
  font-family: var(--font-mono);
  font-size: 0.7rem;
  color: var(--text-muted);
  border: 1px solid var(--border-subtle);
  padding: 3px 9px;
  border-radius: 100px;
  font-weight: 400;
}

.timeline-content p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  max-width: 600px;
}

/* ===================================================================
   CONTACT
=================================================================== */
.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.2fr;
  gap: 56px;
}

.contact-info {
  display: flex;
  flex-direction: column;
}

.contact-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 18px 0;
  border-bottom: 1px solid var(--border-subtle);
  transition: padding-left 0.2s ease;
}
a.contact-row:hover {
  padding-left: 8px;
  color: var(--accent);
}

.contact-label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

.contact-value { font-size: 0.98rem; }

.social-icons {
  display: flex;
  gap: 14px;
  margin-top: 28px;
}
.social-icon {
  width: 42px; height: 42px;
  display: flex;
  align-items: center;
  justify-content: center;
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  color: var(--text-secondary);
  transition: all 0.25s ease;
}
.social-icon svg { width: 18px; height: 18px; }
.social-icon:hover {
  border-color: var(--accent);
  color: var(--accent);
  transform: translateY(-3px);
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 20px;
}

.form-row {
  display: flex;
  flex-direction: column;
  gap: 8px;
}
.form-row label {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}
.form-row input,
.form-row textarea {
  background: var(--bg-card);
  border: 1px solid var(--border-subtle);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 0.95rem;
  resize: vertical;
  transition: border-color 0.2s ease;
}
.form-row input:focus,
.form-row textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.form-row input:focus-visible,
.form-row textarea:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}

.form-note {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--text-muted);
  text-align: center;
}

/* ===================================================================
   FOOTER
=================================================================== */
.footer {
  border-top: 1px solid var(--border-subtle);
}
.footer-inner {
  padding: 32px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 12px;
  font-family: var(--font-mono);
  font-size: 0.82rem;
  color: var(--text-muted);
}
.back-to-top { transition: color 0.2s ease; }
.back-to-top:hover { color: var(--accent); }

/* ===================================================================
   FOCUS STATES (accessibility)
=================================================================== */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 3px;
  border-radius: 4px;
}

/* ===================================================================
   RESPONSIVE
=================================================================== */
@media (max-width: 980px) {
  .hero-inner { grid-template-columns: 1fr; }
  .hero-photo-wrap { order: -1; }
  .hero-photo-frame { max-width: 220px; margin: 0 auto; }
  .about-grid { grid-template-columns: 1fr; }
  .about-stats { grid-template-columns: repeat(4, 1fr); }
  .skills-grid { grid-template-columns: repeat(2, 1fr); }
  .projects-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 720px) {
  .nav-links, .nav-cta { display: none; }
  .nav-toggle { display: flex; }

  .nav-links.open {
    display: flex;
    position: absolute;
    top: 100%; left: 0; right: 0;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border-subtle);
    flex-direction: column;
    padding: 20px 32px;
    gap: 18px;
  }

  .section-inner { padding: 70px 22px; }
  .about-stats { grid-template-columns: 1fr 1fr; }
  .skills-grid { grid-template-columns: 1fr; }
  .cv-box { flex-direction: column; align-items: flex-start; }
  .hero-actions { flex-direction: column; }
  .btn { width: 100%; }
}