/* =========================
   DESIGN SYSTEM
========================= */

:root {
  --bg: #ffffff;
  --surface: #f8f9fb;
  --surface-2: #f3f4f6;
  --border: #e5e7eb;
  --border-hover: #d1d5db;
  --text: #111827;
  --muted: #6b7280;
  --text-active: #2563eb;
  --primary: #111827;
  --primary-hover: #1f2937;
  --navbar-bg: rgba(255, 255, 255, 0.85);
  --navbar-border: rgba(0, 0, 0, 0.05);

  --max-width: 1200px;
  --radius: 18px;
  --transition: 0.3s ease;
  
  --shadow: 0 10px 40px rgba(0,0,0,.08);

  --font: "Inter", system-ui, sans-serif;

  --logo-filter-normal: none;
  --logo-filter-hover: brightness(0) invert(1);
}

[data-theme="dark"] {
  --bg: #0a0a0a;
  --surface: #111111;
  --surface-2: #18181b;
  --border: #27272a;
  --border-hover: rgba(255, 255, 255, .15);
  --text: #fafafa;
  --muted: #a1a1aa;
  --text-active: #ffffff;
  --primary: #ffffff;
  --primary-hover: #e5e5e5;
  --navbar-bg: rgba(10, 10, 10, .75);
  --navbar-border: rgba(255, 255, 255, .05);
  --shadow: 0 10px 30px rgba(0,0,0,.3);

  --logo-filter-normal: brightness(0) invert(1);
  --logo-filter-hover: none;
}

html, body, *, *::before, *::after {
  transition: background-color .35s ease, color .35s ease, border-color .35s ease, box-shadow .35s ease, fill .35s ease, stroke .35s ease;
}

/* =========================
   RESET
========================= */

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

html{
  scroll-behavior:smooth;
}

body{
  font-family:var(--font);
  background:var(--bg);
  color:var(--text);
  overflow-x:hidden;
}

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

ul{
  list-style:none;
}

img{
  max-width:100%;
}

/* =========================
   GLOBAL
========================= */

.container{
  width:min(90%, var(--max-width));
  margin:auto;
}

.section{
  padding:120px 0;
}

.section-label{
  color:var(--muted);
  font-size:.8rem;
  letter-spacing:2px;
  text-transform:uppercase;
  display:block;
  margin-bottom:20px;
}

.section h2{
  font-size:clamp(2rem,5vw,4rem);
  line-height:1.1;
  font-weight:700;
  max-width:800px;
}

.section p{
  color:var(--muted);
  line-height:1.8;
}

/* =========================
   NAVBAR
========================= */

.navbar{
  position:fixed;
  width:100%;
  top:0;
  z-index:1000;

  backdrop-filter:blur(18px);

  background: var(--navbar-bg);

  border-bottom: 1px solid var(--navbar-border);
}

.nav-container{
  display:flex;
  justify-content:space-between;
  align-items:center;

  height:80px;
}

.logo{
  font-size:1rem;
  font-weight:600;
}

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

.nav-links a{
  color:var(--muted);
  transition:var(--transition);
}

.nav-links a:hover{
  color:var(--white);
}

.menu-btn{
  display:none;

  border:none;
  background:none;

  color:var(--text);
  font-size:1.5rem;

  cursor:pointer;
}

/* =========================
   HERO
========================= */

.hero{
  min-height:100vh;

  display:flex;
  align-items:center;

  padding-top:120px;
}

.eyebrow{
  display:inline-flex;

  padding:.5rem 1rem;

  border:
  1px solid var(--border);

  border-radius:999px;

  color:var(--muted);

  margin-bottom:2rem;
}

.hero h1{
  font-size:
  clamp(3rem,8vw,6.5rem);

  line-height:1;

  font-weight:800;

  max-width:1000px;

  letter-spacing:-3px;
}

.hero-description{
  margin-top:2rem;

  max-width:700px;

  font-size:1.15rem;

  color:var(--muted);

  line-height:1.8;
}

.hero-buttons{
  display:flex;
  gap:1rem;

  margin-top:3rem;
}

.btn-primary{
  padding:1rem 1.8rem;

  background:var(--primary);
  color:var(--bg);

  border-radius:12px;

  font-weight:600;

  transition:.3s;
}

.btn-primary:hover{
  transform:translateY(-2px);
}

.btn-secondary{
  padding:1rem 1.8rem;

  border:1px solid var(--border);

  border-radius:12px;

  color:var(--text);

  transition:.3s;
}

.btn-secondary:hover{
  background:var(--surface);
}

.hero-stats{
  display:flex;
  gap:4rem;

  margin-top:5rem;
}

.hero-stats h3{
  font-size:2rem;
}

.hero-stats span{
  color:var(--muted);
}

/* =========================
   ABOUT
========================= */

.about-grid{
  margin-top:4rem;

  display:grid;

  grid-template-columns:
  1.5fr 1fr;

  gap:4rem;
}

.about-card{
  padding:2rem;

  background:var(--surface);

  border:
  1px solid var(--border);

  border-radius:var(--radius);
}

.about-card h4{
  margin-bottom:1.5rem;
}

.about-card-subtitle {
  color: var(--muted);
  font-size: 0.95rem;
  margin-bottom: 2rem;
  line-height: 1.5;
}

.chips-container {
  display: flex;
  flex-wrap: wrap;
  gap: 0.8rem;
}

.chip {
  padding: 0.6rem 1.2rem;
  background: var(--surface-2);
  color: var(--text);
  border: 1px solid var(--border);
  border-radius: 999px;
  font-size: 0.9rem;
  font-weight: 500;
  transition: transform 0.25s ease, box-shadow 0.25s ease, border-color 0.25s ease;
  cursor: default;
}

.chip:hover {
  transform: scale(1.03);
  box-shadow: 0 4px 12px rgba(0,0,0,0.06);
  border-color: var(--border-hover);
}



/* =========================
   PROJECTS
========================= */

.project{
  margin-top: 4rem;
  border: 1px solid var(--border);
  border-radius: 28px;
  background: var(--surface);
  padding: 3.5rem;
  transition: .4s ease;
  
  display: flex;
  align-items: center;
  gap: 4rem;
}

.project:hover{
  transform: translateY(-4px);
  border-color: var(--border-hover);
  box-shadow: var(--shadow);
}

.project-content {
  flex: 1;
}

.project-image-wrapper {
  flex: 1;
  max-width: 50%;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 10px 30px rgba(0,0,0,0.08);
  border: 1px solid var(--border);
  transition: transform 0.4s ease, box-shadow 0.4s ease;
}

[data-theme="dark"] .project-image-wrapper {
  box-shadow: 0 10px 30px rgba(0,0,0,0.4);
}

.project:hover .project-image-wrapper {
  transform: translateY(-4px) scale(1.01);
  box-shadow: 0 15px 40px rgba(0,0,0,0.12);
}

[data-theme="dark"] .project:hover .project-image-wrapper {
  box-shadow: 0 15px 40px rgba(0,0,0,0.5);
}

.project-image-wrapper img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.project h3{
  font-size: 2.2rem;
  font-weight: 700;
  margin-bottom: 1rem;
  letter-spacing: -0.5px;
}

.project p{
  max-width: 800px;
  color: var(--muted);
  line-height: 1.6;
  font-size: 1.05rem;
  margin-bottom: 2rem;
}

.project ul{
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 1.2rem;
}

.project li{
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--muted);
  font-size: 0.95rem;
  font-weight: 500;
}

.check-icon {
  width: 18px;
  height: 18px;
  color: var(--primary);
  flex-shrink: 0;
}

.project-links{
  margin-top: 2.5rem;
  display: flex;
  gap: 1rem;
}

/* =========================
   SKILLS
========================= */

.skills-grid{
  margin-top:4rem;

  display:flex;

  flex-wrap:wrap;

  gap:1rem;
}

.skills-grid span{
  padding:
  .9rem 1.2rem;

  border:
  1px solid var(--border);

  border-radius:999px;

  color:var(--muted);

  transition:.3s;
}

.skills-grid span:hover{
  background:var(--surface);

  color:var(--text);
}

/* =========================
   CONTACT
========================= */

.contact{
  text-align:center;
}

.contact h2{
  margin:auto;
}

.contact p{
  max-width:700px;

  margin:
  2rem auto;
}

.contact-links{
  display:flex;
  justify-content:center;
  gap:1rem;
}

.contact-links a{
  padding:1rem 1.5rem;

  border:
  1px solid var(--border);

  border-radius:12px;

  transition:.3s;
}

.contact-links a:hover{
  background:var(--surface);
}

/* =========================
   FOOTER
========================= */

footer{
  padding:2rem 0;

  border-top:
  1px solid var(--border);

  text-align:center;

  color:var(--muted);
}

/* =========================
   REVEAL ANIMATIONS
========================= */

.reveal{
  opacity:0;

  transform:
  translateY(50px);

  transition:
  opacity .8s ease,
  transform .8s ease;
}

.reveal.active{
  opacity:1;

  transform:
  translateY(0);
}

/* =========================
   MOBILE
========================= */

@media(max-width:1024px){
  .project{
    flex-direction: column-reverse;
    gap: 2.5rem;
    padding: 2.5rem;
  }
  
  .project-image-wrapper{
    max-width: 100%;
    width: 100%;
  }
  
  .project h3{
    font-size: 1.8rem;
  }
}

@media(max-width:900px){

  .about-grid{
    grid-template-columns:1fr;
  }

  .project ul{
    grid-template-columns:1fr;
  }

  .hero-stats{
    gap:2rem;
    flex-wrap:wrap;
  }
}

@media(max-width:768px){

  .nav-links{
    display:none;
  }

  .menu-btn{
    display:block;
  }

  .hero h1{
    letter-spacing:-2px;
  }

  .hero-buttons{
    flex-direction:column;
  }

  .contact-links{
    flex-direction:column;
  }

  .section{
    padding:90px 0;
  }
}

/* EDUCATION */

.education-card{
  margin-top:3rem;

  padding:2rem;

  background:var(--surface);

  border:1px solid var(--border);

  border-radius:20px;
}

.education-top{
  display:flex;
  justify-content:space-between;
  align-items:center;
}

.education-card h3{
  font-size:1.3rem;
}

.education-card p{
  margin-top:1rem;
  color:var(--muted);
}

.education-badge{
  padding:.5rem 1rem;

  border-radius:999px;

  background:var(--primary);
  color:var(--bg);

  font-size:.85rem;
  font-weight:600;
}

/* CERTIFICATIONS */

.cert-grid{
  display:grid;
  grid-template-columns:
  repeat(auto-fit,minmax(250px,1fr));

  gap:1.5rem;

  margin-top:3rem;
}

.cert-card{
  padding:2rem;

  background:var(--surface);

  border:1px solid var(--border);

  border-radius:20px;

  transition:.3s;
}

.cert-card:hover{
  transform:translateY(-5px);
}

.cert-card h3{
  font-size:1rem;
  line-height:1.5;
}

.cert-card p{
  margin-top:1rem;
  color:var(--muted);
}

/* resume */

.resume-btn{
  padding:.9rem 1.3rem;

  border:1px solid var(--border);

  border-radius:12px;

  color:var(--text);

  transition:.3s;
}

.resume-btn:hover{
  background:var(--primary);
  color:var(--bg);
}

/* =========================
   SKILLS SECTION
========================= */

.skills-wrapper{
  margin-top:4rem;

  display:grid;
  grid-template-columns:
  repeat(auto-fit,minmax(320px,1fr));

  gap:2rem;
}

.skill-category{
  padding:2rem;

  background:var(--surface);

  border:1px solid var(--border);

  border-radius:24px;

  transition:
  transform .3s ease,
  border-color .3s ease,
  box-shadow .3s ease;
}

.skill-category:hover{
  transform:translateY(-6px);

  border-color: var(--border-hover);

  box-shadow: var(--shadow);
}

.skill-category h3{
  font-size:1.15rem;

  font-weight:600;

  margin-bottom:1.5rem;

  color:var(--text);

  position:relative;
}


.skills-grid{
  display:flex;

  flex-wrap:wrap;

  gap:.8rem;
}

.skills-grid span{
  padding:.75rem 1rem;

  border-radius:999px;

  border:1px solid var(--border);

  background:var(--surface-2);

  color:var(--text);

  font-size:.9rem;

  font-weight:500;

   display:flex;
  align-items:center;
  gap:.6rem;

  transition:
  background .3s ease,
  transform .3s ease,
  border-color .3s ease;
}
.skills-grid img{
  width:18px;
  height:18px;
  filter: var(--logo-filter-normal);
  transition: filter .3s ease;
}

.skills-grid span:hover img{
  filter: var(--logo-filter-hover);
}


.skills-grid span:hover{
  background:var(--primary);
  color:var(--bg);

  border-color:var(--text);

  transform:translateY(-2px);
}

/* =========================
   SECTION HEADING
========================= */

#skills .section-label{
  margin-bottom:1rem;
}

#skills h2{
  margin-bottom:1rem;
}

#skills .container > p{
  color:var(--muted);

  max-width:700px;

  margin-bottom:3rem;
}

/* =========================
   MOBILE
========================= */

@media(max-width:768px){

  .skills-wrapper{
    grid-template-columns:1fr;
  }

  .skill-category{
    padding:1.5rem;
  }

}
/* Active nav link */

.active-link{
  color:var(--text-active) !important;
}

/* Mobile Menu */

@media(max-width:768px){

  .nav-links.mobile-open{
    display:flex;

    position:absolute;

    top:80px;
    left:0;
    right:0;

    flex-direction:column;

    padding:2rem;

    background:var(--surface);

    border-bottom: 1px solid var(--border);
  }
}

/* =========================
   THEME TOGGLE
========================= */
.nav-actions {
  display: flex;
  align-items: center;
  gap: 1rem;
}
.theme-toggle {
  background: transparent;
  border: none;
  outline: none;
  box-shadow: none;
  -webkit-tap-highlight-color: transparent;
  color: var(--text);
  cursor: pointer;
  position: relative;
  width: 24px;
  height: 24px;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 0;
}
.theme-toggle svg {
  position: absolute;
  width: 20px;
  height: 20px;
}
/* Light theme (default) -> show moon, hide sun */
[data-theme="light"] .sun-icon, :root:not([data-theme="dark"]) .sun-icon {
  opacity: 0;
  transform: rotate(90deg) scale(0);
}
[data-theme="light"] .moon-icon, :root:not([data-theme="dark"]) .moon-icon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}
/* Dark theme -> show sun, hide moon */
[data-theme="dark"] .sun-icon {
  opacity: 1;
  transform: rotate(0deg) scale(1);
}
[data-theme="dark"] .moon-icon {
  opacity: 0;
  transform: rotate(-90deg) scale(0);
}
.mobile-toggle-li {
  display: none;
}
@media(max-width:768px) {
  .desktop-toggle {
    display: none;
  }
  .mobile-toggle-li {
    display: block;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
  }
}