@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@300;400;500;600;700;800&display=swap');

/* ============================================
   DESIGN TOKENS
   ============================================ */
:root{
  /* colors — biscuit + sage green, warm charcoal base */
  --color-bg:            #12160f;
  --color-bg-alt:        #1a2117;
  --color-text:          #ede9e0;
  --color-text-muted:    #c7c4b8;
  --color-accent-green:   #7FA97F;
  --color-accent-green-rgb: 127,169,127;
  --color-accent-biscuit:#D9B48A;
  --color-border:        rgba(255,255,255,0.08);

  /* type */
  --font-base:'Poppins', sans-serif;
  --fs-h1:clamp(2.25rem, 5vw, 4rem);
  --fs-h2:clamp(1.75rem, 4vw, 3rem);
  --fs-h2-lg:clamp(2rem, 5vw, 4rem);
  --fs-h3:clamp(1.25rem, 2.5vw, 1.5rem);
  --fs-body:1rem;
  --lh-body:1.8;

  /* spacing scale */
  --space-1:8px;
  --space-2:12px;
  --space-3:16px;
  --space-4:20px;
  --space-5:30px;
  --space-6:50px;
  --space-7:100px;

  /* layout */
  --radius-sm:8px;
  --radius-md:10px;
  --radius-lg:20px;
  --radius-pill:30px;
  --container-pad:clamp(20px, 8%, 120px);
  --transition:0.3s ease;
  --transition-slow:0.4s ease;
}

*{
  margin:0;
  padding:0;
  box-sizing:border-box;
  font-family:var(--font-base);
}

html{
  scroll-behavior:smooth;
}

@media (prefers-reduced-motion: reduce){
  html{ scroll-behavior:auto; }
  *{ animation-duration:0.01ms !important; transition-duration:0.01ms !important; }
}

body{
  background:var(--color-bg);
  color:var(--color-text);
  line-height:1.5;
}

a{ color:inherit; }

img{ max-width:100%; display:block; }

/* consistent, visible focus state for keyboard users */
a:focus-visible,
button:focus-visible,
input:focus-visible,
textarea:focus-visible{
  outline:2px solid var(--color-accent-green);
  outline-offset:3px;
}

/* ============================================
   NAVBAR
   ============================================ */
.navbar{
  position:fixed;
  top:0;
  width:100%;
  display:flex;
  justify-content:space-between;
  align-items:center;
  padding:var(--space-4) var(--container-pad);
  background:rgba(11,18,32,0.95);
  backdrop-filter:blur(10px);
  z-index:1000;
}

.logo{
  font-size:1.75rem;
  font-weight:800;
  color:var(--color-accent-biscuit);
}

.nav-links{
  display:flex;
  list-style:none;
  gap:var(--space-5);
}

.nav-links a{
  text-decoration:none;
  color:var(--color-text);
  font-weight:500;
  transition:color var(--transition);
}

.nav-links a:hover,
.nav-links a.active{
  color:var(--color-accent-green);
}

.nav-toggle{
  display:none;
  background:none;
  border:none;
  color:var(--color-text);
  font-size:1.5rem;
  cursor:pointer;
}

/* ============================================
   HERO
   ============================================ */
.hero{
  min-height:100vh;
  display:flex;
  align-items:center;
  justify-content:space-between;
  padding:120px var(--container-pad) var(--space-7);
  gap:50px;
  flex-wrap:wrap;
}

.hero-text{ flex:1 1 480px; }

.hero-text h3{
  color:var(--color-accent-biscuit);
  margin-bottom:var(--space-2);
  font-weight:500;
}

.hero-text h1{
  font-size:var(--fs-h1);
  font-weight:800;
  line-height:1.1;
  margin-bottom:var(--space-4);
}

.hero-text h2{
  font-size:var(--fs-h3);
  margin-bottom:var(--space-4);
  color:var(--color-accent-green);
  font-weight:600;
}

.hero-text p{
  font-size:var(--fs-body);
  line-height:var(--lh-body);
  max-width:600px;
  color:var(--color-text-muted);
}

.badge{
  display:inline-block;
  padding:var(--space-1) var(--space-4);
  border:1px solid var(--color-accent-biscuit);
  border-radius:var(--radius-pill);
  color:var(--color-accent-biscuit);
  margin-bottom:var(--space-4);
  font-size:0.85rem;
  letter-spacing:0.02em;
}

.social-icons{
  margin-top:var(--space-5);
  display:flex;
  gap:var(--space-4);
  flex-wrap:wrap;
}

.social-icons a{
  text-decoration:none;
  color:var(--color-accent-biscuit);
  font-weight:600;
  transition:color var(--transition);
}

.social-icons a:hover{
  color:var(--color-accent-green);
}

.buttons{
  margin-top:var(--space-5);
  display:flex;
  flex-wrap:wrap;
  gap:var(--space-3);
}

.btn,
.btn-secondary{
  display:inline-block;
  text-decoration:none;
  padding:12px 28px;
  border-radius:var(--radius-pill);
  font-weight:600;
  transition:transform var(--transition), background var(--transition), color var(--transition);
}

.btn{
  background:var(--color-accent-green);
  color:var(--color-bg);
  border:2px solid var(--color-accent-green);
}

.btn:hover{
  transform:translateY(-4px);
  background:var(--color-accent-biscuit);
  border-color:var(--color-accent-biscuit);
}

.btn-secondary{
  border:2px solid var(--color-accent-biscuit);
  color:var(--color-accent-biscuit);
  background:transparent;
}

.btn-secondary:hover{
  background:var(--color-accent-biscuit);
  color:var(--color-bg);
  transform:translateY(-4px);
}

.hero-image{
  flex:1 1 280px;
  display:flex;
  justify-content:center;
}

.hero-image img{
  width:280px;
  height:280px;
  object-fit:cover;
  object-position:center top;
  border-radius:50%;
  border:5px solid var(--color-accent-green);
  box-shadow:0 0 24px rgba(var(--color-accent-green-rgb),0.35);
}

/* ============================================
   SECTION SHARED PATTERNS
   ============================================ */
section{
  padding:var(--space-7) var(--container-pad);
}

.about{ background:var(--color-bg-alt); }
.skills{ background:var(--color-bg); }
.projects{ background:var(--color-bg-alt); }
.contact{ background:var(--color-bg); }

.about-title h2,
.projects-title h2,
.contact-title h2{
  text-align:center;
  font-size:var(--fs-h2);
  color:var(--color-accent-biscuit);
  margin-bottom:var(--space-6);
}

.skills-title h2{
  text-align:center;
  color:var(--color-accent-green);
  font-size:var(--fs-h2-lg);
  margin-bottom:var(--space-6);
}

/* ============================================
   ABOUT
   ============================================ */
.about-content{
  max-width:800px;
  margin:0 auto;
}

.about-content p{
  font-size:var(--fs-body);
  line-height:var(--lh-body);
  color:var(--color-text-muted);
  margin-bottom:var(--space-4);
  text-align:center;
}

.about-highlight{
  display:flex;
  justify-content:center;
  gap:var(--space-2);
  flex-wrap:wrap;
  margin-top:var(--space-5);
}

.about-highlight span{
  padding:10px 18px;
  border:1px solid var(--color-accent-green);
  border-radius:var(--radius-pill);
  color:var(--color-accent-green);
  font-size:0.85rem;
}

/* ============================================
   SKILLS
   ============================================ */
.skills-container{
  display:flex;
  justify-content:center;
  flex-wrap:wrap;
  gap:var(--space-5);
}

.skill-card{
  width:250px;
  background:var(--color-bg-alt);
  padding:var(--space-5);
  border-radius:var(--radius-lg);
  text-align:center;
  border:1px solid var(--color-border);
  transition:transform var(--transition-slow), border-color var(--transition-slow);
}

.skill-card:hover{
  transform:translateY(-10px);
  border-color:var(--color-accent-green);
}

/* ============================================
   PROJECTS
   ============================================ */
.projects-container{
  display:flex;
  justify-content:center;
  gap:var(--space-5);
  flex-wrap:wrap;
}

.project-card{
  width:320px;
  background:var(--color-bg);
  padding:var(--space-5);
  border-radius:var(--radius-lg);
  border:1px solid var(--color-border);
  transition:transform var(--transition), border-color var(--transition);
}

.project-card:hover{
  transform:translateY(-10px);
  border-color:var(--color-accent-green);
}

.project-card h3{
  color:var(--color-accent-biscuit);
  margin-bottom:var(--space-3);
  font-size:1.5rem;
}

.project-card span{
  display:block;
  color:var(--color-accent-green);
  margin-bottom:var(--space-4);
  font-size:0.9rem;
}

.project-buttons{
  display:flex;
  gap:var(--space-2);
  margin-top:var(--space-4);
}

.project-btn{
  text-decoration:none;
  padding:10px 18px;
  border-radius:var(--radius-sm);
  font-weight:600;
  transition:transform var(--transition), background var(--transition), color var(--transition);
}

.demo-btn{
  background:var(--color-accent-green);
  color:var(--color-bg);
}

.demo-btn:hover{
  transform:scale(1.05);
  background:var(--color-accent-biscuit);
}

.github-btn{
  background:transparent;
  color:var(--color-accent-biscuit);
  border:1px solid var(--color-accent-biscuit);
}

.github-btn:hover{
  background:var(--color-accent-biscuit);
  color:var(--color-bg);
  transform:scale(1.05);
}

/* ============================================
   CONTACT
   ============================================ */
.contact-container{
  display:flex;
  justify-content:space-between;
  gap:50px;
  flex-wrap:wrap;
}

.contact-info{ flex:1 1 300px; }

.contact-info h3{
  color:var(--color-accent-biscuit);
  font-size:1.75rem;
  margin-bottom:var(--space-3);
}

.contact-info p{
  color:#ddd;
  line-height:var(--lh-body);
  margin-bottom:var(--space-2);
}

.contact-details p{
  color:#fff;
}

.contact-form{
  flex:1 1 300px;
  display:flex;
  flex-direction:column;
  gap:var(--space-3);
}

.contact-form input,
.contact-form textarea{
  padding:var(--space-2);
  border-radius:var(--radius-md);
  border:1px solid var(--color-accent-green);
  background:var(--color-bg-alt);
  color:#fff;
  font-size:0.95rem;
}

.contact-form input::placeholder,
.contact-form textarea::placeholder{
  color:rgba(255,255,255,0.5);
}

.contact-form button{
  padding:var(--space-2);
  border:none;
  border-radius:var(--radius-md);
  background:var(--color-accent-green);
  color:var(--color-bg);
  font-weight:600;
  cursor:pointer;
  transition:background var(--transition);
}

.contact-form button:hover{
  background:var(--color-accent-biscuit);
}

/* ============================================
   SCROLL-REVEAL UTILITY
   ============================================ */
.hidden{
  opacity:0;
  transform:translateY(40px);
  transition:opacity .8s ease, transform .8s ease;
}

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

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width:768px){
  .nav-links{
    position:absolute;
    top:100%;
    left:0;
    right:0;
    flex-direction:column;
    background:var(--color-bg);
    padding:var(--space-4);
    display:none;
  }

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

  .nav-toggle{
    display:block;
  }

  .hero{
    padding-top:140px;
    text-align:center;
    justify-content:center;
  }

  .hero-text p{
    margin:0 auto;
  }

  .social-icons,
  .buttons{
    justify-content:center;
  }

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

@media (max-width:480px){
  .skill-card,
  .project-card{
    width:100%;
    max-width:340px;
  }
}