/* ============================================================
   PORTFOLIO — style.css
   Author : Mahir Khan
   ============================================================ */


/* ─────────────────────────────────────────────
   1. CSS VARIABLES & RESET
───────────────────────────────────────────── */
:root {
  --clr-bg:           #0a0a0f;
  --clr-surface:      #111118;
  --clr-border:       rgba(255, 255, 255, 0.07);
  --clr-text:         #e8e8f0;
  --clr-muted:        #6b6b80;
  --clr-accent:       #7c6aff;
  --clr-accent-2:     #ff6a5e;
  --clr-accent-glow:  rgba(124, 106, 255, 0.25);

  --font-display:  'DM Serif Display', Georgia, serif;
  --font-mono:     'DM Mono', 'Courier New', monospace;

  --section-gap:   10rem;
  --container-max: 1100px;

  --ease:       cubic-bezier(0.4, 0, 0.2, 1);
  --transition: 0.3s var(--ease);
}

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

html { scroll-behavior: smooth; font-size: 16px; }

body {
  background-color: var(--clr-bg);
  color: var(--clr-text);
  font-family: var(--font-mono);
  font-weight: 300;
  line-height: 1.75;
  overflow-x: hidden;
  cursor: none;
}

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


/* ─────────────────────────────────────────────
   2. TYPOGRAPHY
───────────────────────────────────────────── */
h1, h2, h3 {
  font-family: var(--font-display);
  font-weight: 400;
  line-height: 1.15;
  letter-spacing: -0.02em;
}

em {
  font-family: var(--font-display);
  font-style: italic;
  color: var(--clr-accent);
}

p {
  color: var(--clr-muted);
  max-width: 56ch;
}


/* ─────────────────────────────────────────────
   3. UTILITIES
───────────────────────────────────────────── */
.container {
  width: 90%;
  max-width: var(--container-max);
  margin: 0 auto;
}

.section { padding: var(--section-gap) 0; }

.section-label {
  font-size: 0.7rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
  color: var(--clr-accent);
  margin-bottom: 2.5rem;
  font-weight: 500;
}

.section-heading {
  font-size: clamp(2.2rem, 5vw, 3.6rem);
  margin-bottom: 2.5rem;
}

/* Buttons */
.btn {
  display: inline-block;
  padding: 0.75rem 1.75rem;
  border-radius: 2px;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  transition: var(--transition);
  cursor: none;
}

.btn-primary {
  background: var(--clr-accent);
  color: #fff;
  border: 1px solid var(--clr-accent);
}
.btn-primary:hover {
  background: transparent;
  color: var(--clr-accent);
  box-shadow: 0 0 24px var(--clr-accent-glow);
}

.btn-ghost {
  background: transparent;
  color: var(--clr-text);
  border: 1px solid var(--clr-border);
}
.btn-ghost:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
}

.btn-large { padding: 1rem 2.5rem; font-size: 0.875rem; }


/* ─────────────────────────────────────────────
   4. SCROLL REVEAL ANIMATIONS
   (No AOS dependency — pure CSS + JS observer)
───────────────────────────────────────────── */
.reveal {
  opacity: 0;
  transform: translateY(32px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

.reveal.reveal-delay {
  transition-delay: 0.18s;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}


/* ─────────────────────────────────────────────
   5. CURSOR
───────────────────────────────────────────── */
.cursor {
  position: fixed;
  top: 0; left: 0;
  width: 8px; height: 8px;
  background: var(--clr-accent);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9999;
  transform: translate(-50%, -50%);
  transition: background 0.2s;
}

.cursor-follower {
  position: fixed;
  top: 0; left: 0;
  width: 36px; height: 36px;
  border: 1px solid var(--clr-accent);
  border-radius: 50%;
  pointer-events: none;
  z-index: 9998;
  transform: translate(-50%, -50%);
  opacity: 0.5;
  transition: width 0.3s, height 0.3s, opacity 0.2s;
}

.cursor.expanded        { transform: translate(-50%, -50%) scale(2.5); }
.cursor-follower.expanded { transform: translate(-50%, -50%) scale(1.4); }


/* ─────────────────────────────────────────────
   6. CANVAS BACKGROUND  ← KEY FIX: z-index -1
───────────────────────────────────────────── */
#bg-canvas {
  position: fixed;
  inset: 0;
  z-index: -1;          /* sits behind everything */
  pointer-events: none;
  opacity: 0.55;
}


/* ─────────────────────────────────────────────
   7. NAVBAR
───────────────────────────────────────────── */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.5rem 5%;
  transition: background var(--transition), padding var(--transition);
}

.navbar.scrolled {
  background: rgba(10, 10, 15, 0.9);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  padding: 1rem 5%;
  border-bottom: 1px solid var(--clr-border);
}

.nav-logo {
  font-family: var(--font-display);
  font-size: 1.5rem;
  letter-spacing: -0.03em;
  z-index: 101;
}
.nav-logo .dot { color: var(--clr-accent); }

.nav-links { display: flex; gap: 2.5rem; }

.nav-link {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--clr-muted);
  position: relative;
  transition: color var(--transition);
}
.nav-link::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 0; height: 1px;
  background: var(--clr-accent);
  transition: width var(--transition);
}
.nav-link:hover              { color: var(--clr-text); }
.nav-link:hover::after,
.nav-link.active::after      { width: 100%; }
.nav-link.active             { color: var(--clr-text); }

/* Hamburger */
.nav-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: none;
  padding: 4px;
  z-index: 101;
}
.nav-toggle span {
  display: block;
  width: 24px; height: 1.5px;
  background: var(--clr-text);
  transition: var(--transition);
}


/* ─────────────────────────────────────────────
   8. HERO
───────────────────────────────────────────── */
.hero {
  position: relative;
  z-index: 1;
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0 5%;
  text-align: center;
}

.hero-inner { max-width: 800px; }

.hero-greeting {
  font-size: 0.8rem;
  letter-spacing: 0.25em;
  text-transform: uppercase;
  color: var(--clr-accent);
  margin-bottom: 1rem;
  animation: fadeUp 0.8s var(--ease) both;
}

.hero-name {
  font-size: clamp(3.5rem, 10vw, 8rem);
  line-height: 1;
  margin-bottom: 1.25rem;
  letter-spacing: -0.04em;
  animation: fadeUp 0.8s 0.15s var(--ease) both;
}

.hero-tagline {
  font-size: 0.9rem;
  color: var(--clr-muted);
  max-width: none;
  margin-bottom: 3rem;
  letter-spacing: 0.05em;
  animation: fadeUp 0.8s 0.28s var(--ease) both;
}

.hero-cta {
  display: flex;
  gap: 1rem;
  justify-content: center;
  flex-wrap: wrap;
  animation: fadeUp 0.8s 0.4s var(--ease) both;
}

@keyframes fadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* Scroll hint */
.hero-scroll-hint {
  position: absolute;
  bottom: 2.5rem;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.5rem;
  color: var(--clr-muted);
  animation: fadeUp 1s 0.8s var(--ease) both;
}
.hero-scroll-hint span {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  text-transform: uppercase;
}
.scroll-line {
  width: 1px;
  height: 50px;
  background: linear-gradient(to bottom, var(--clr-accent), transparent);
  animation: scrollPulse 2s ease-in-out infinite;
}
@keyframes scrollPulse {
  0%, 100% { opacity: 0.4; }
  50%       { opacity: 1; }
}


/* ─────────────────────────────────────────────
   9. ABOUT
───────────────────────────────────────────── */
.about {
  position: relative;
  z-index: 1;
}
.about::before {
  content: '';
  position: absolute;
  top: 0; left: 5%; width: 90%; height: 1px;
  background: linear-gradient(to right, transparent, var(--clr-border), transparent);
}

.about-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 5rem;
  align-items: start;
}

.about-text p { margin-bottom: 1rem; }

.skills-list {
  display: flex;
  flex-wrap: wrap;
  gap: 0.6rem;
  margin-top: 2rem;
}
.skills-list li {
  font-size: 0.7rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--clr-muted);
  border: 1px solid var(--clr-border);
  padding: 0.35rem 0.85rem;
  border-radius: 2px;
  transition: var(--transition);
}
.skills-list li:hover {
  border-color: var(--clr-accent);
  color: var(--clr-accent);
}

/* Stats card */
.about-card {
  position: sticky;
  top: 8rem;
}
.about-card-inner {
  border: 1px solid var(--clr-border);
  border-radius: 4px;
  padding: 2.5rem;
  background: var(--clr-surface);
  display: flex;
  flex-direction: column;
  gap: 2rem;
  position: relative;
  overflow: hidden;
}
.about-card-inner::before {
  content: '';
  position: absolute;
  top: 0; left: 0;
  width: 100%; height: 2px;
  background: linear-gradient(to right, var(--clr-accent), var(--clr-accent-2));
}

.stat { display: flex; flex-direction: column; gap: 0.25rem; }

.stat-num {
  font-family: var(--font-display);
  font-size: 3rem;
  line-height: 1;
  letter-spacing: -0.04em;
}
.stat-num::after {
  content: '+';
  font-size: 1.5rem;
  color: var(--clr-accent);
}

.stat-label {
  font-size: 0.7rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--clr-muted);
}

.about-availability {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  font-size: 0.75rem;
  color: #4ade80;
  letter-spacing: 0.05em;
  border-top: 1px solid var(--clr-border);
  padding-top: 1.5rem;
  margin-top: 0.5rem;
}
.avail-dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #4ade80;
  flex-shrink: 0;
  animation: blink 2s ease-in-out infinite;
}
@keyframes blink {
  0%, 100% { opacity: 1; box-shadow: 0 0 6px #4ade80; }
  50%       { opacity: 0.4; box-shadow: none; }
}


/* ─────────────────────────────────────────────
   10. PROJECTS
───────────────────────────────────────────── */
.projects {
  position: relative;
  z-index: 1;
}
.projects::before {
  content: '';
  position: absolute;
  top: 0; left: 5%; width: 90%; height: 1px;
  background: linear-gradient(to right, transparent, var(--clr-border), transparent);
}

.projects-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
}

.project-card {
  border: 1px solid var(--clr-border);
  border-radius: 4px;
  padding: 2rem;
  background: var(--clr-surface);
  display: flex;
  flex-direction: column;
  gap: 1rem;
  transition: transform var(--transition), border-color var(--transition), box-shadow var(--transition);
  position: relative;
  overflow: hidden;
}
.project-card::after {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at top left, var(--clr-accent-glow), transparent 70%);
  opacity: 0;
  transition: opacity var(--transition);
  pointer-events: none;
}
.project-card:hover {
  transform: translateY(-4px);
  border-color: rgba(124, 106, 255, 0.3);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
}
.project-card:hover::after { opacity: 1; }

.project-card--accent {
  border-color: rgba(124, 106, 255, 0.25);
  background: linear-gradient(135deg, rgba(124, 106, 255, 0.06), var(--clr-surface));
}

.project-card-header {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.project-number {
  font-size: 0.65rem;
  letter-spacing: 0.2em;
  color: var(--clr-accent);
  font-weight: 500;
}

.icon-link {
  font-size: 1.1rem;
  color: var(--clr-muted);
  transition: color var(--transition), transform var(--transition);
  display: inline-block;
}
.icon-link:hover {
  color: var(--clr-accent);
  transform: translate(2px, -2px);
}

.project-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 400;
  letter-spacing: -0.02em;
  color: var(--clr-text);
}

.project-desc {
  font-size: 0.85rem;
  color: var(--clr-muted);
  line-height: 1.7;
  flex: 1;
  max-width: none;
}

.project-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  margin-top: auto;
}
.project-tags li {
  font-size: 0.65rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--clr-muted);
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--clr-border);
  padding: 0.25rem 0.7rem;
  border-radius: 2px;
}


/* ─────────────────────────────────────────────
   11. CONTACT
───────────────────────────────────────────── */
.contact {
  position: relative;
  z-index: 1;
  text-align: center;
}
.contact::before {
  content: '';
  position: absolute;
  top: 0; left: 5%; width: 90%; height: 1px;
  background: linear-gradient(to right, transparent, var(--clr-border), transparent);
}

.contact-inner {
  max-width: 680px;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1.5rem;
}

.contact-heading { font-size: clamp(2.5rem, 6vw, 4.5rem); }
.contact-sub     { text-align: center; max-width: none; }

.contact-links {
  display: flex;
  gap: 2.5rem;
  justify-content: center;
  flex-wrap: wrap;
  margin-top: 4rem;
}
.contact-links a {
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--clr-muted);
  transition: color var(--transition);
  position: relative;
}
.contact-links a::after {
  content: '';
  position: absolute;
  bottom: -3px; left: 0;
  width: 0; height: 1px;
  background: var(--clr-accent);
  transition: width var(--transition);
}
.contact-links a:hover             { color: var(--clr-text); }
.contact-links a:hover::after      { width: 100%; }


/* ─────────────────────────────────────────────
   12. FOOTER
───────────────────────────────────────────── */
.footer {
  position: relative;
  z-index: 1;
  border-top: 1px solid var(--clr-border);
  padding: 2rem 5%;
}
.footer .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.footer p       { font-size: 0.75rem; color: var(--clr-muted); max-width: none; letter-spacing: 0.05em; }
.footer-year    { color: var(--clr-muted); }


/* ─────────────────────────────────────────────
   13. RESPONSIVE
───────────────────────────────────────────── */
@media (max-width: 900px) {
  :root { --section-gap: 6rem; }
  .about-grid      { grid-template-columns: 1fr; gap: 3rem; }
  .about-card      { position: static; }
  .projects-grid   { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  :root { --section-gap: 5rem; }

  .nav-toggle { display: flex; }

  .nav-links {
    position: fixed;
    top: 0; right: 0;
    height: 100vh; width: 70vw;
    background: var(--clr-surface);
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 2.5rem;
    transform: translateX(100%);
    transition: transform var(--transition);
    border-left: 1px solid var(--clr-border);
    z-index: 99;
  }
  .nav-links.open  { transform: translateX(0); }
  .nav-link        { font-size: 1rem; }

  .nav-toggle.active span:nth-child(1) { transform: rotate(45deg)  translate(4.7px, 4.7px); }
  .nav-toggle.active span:nth-child(2) { opacity: 0; }
  .nav-toggle.active span:nth-child(3) { transform: rotate(-45deg) translate(4.7px, -4.7px); }

  body                      { cursor: auto; }
  .cursor, .cursor-follower { display: none; }
}