/* =========================================================
   PORTFOLIO THEME — Professional CSS Structure
   - Tokens / Theme
   - Base / Reset
   - Layout
   - Components
   - Utilities / Effects
   - Responsive
   ========================================================= */


/* =========================================================
   1) THEME / TOKENS
   ========================================================= */
:root{
  /* Colors */
  --bg-main: #050816;
  --bg-elevated: rgba(9, 14, 32, .78);
  --bg-card: rgba(10, 16, 40, .72);

  --text: #e5e7eb;
  --muted: rgba(229, 231, 235, .72);

  --blue: #3b82f6;      /* primary */
  --blue-2: #60a5fa;    /* glow */
  --cyan: #22d3ee;      /* accent */

  --border: rgba(148, 163, 184, .22);
  --border-strong: rgba(59, 130, 246, .35);

  /* Radius */
  --radius-lg: 18px;
  --radius-md: 12px;
  --radius-full: 999px;

  /* Shadow */
  --shadow: 0 18px 50px rgba(0,0,0,.45);

  /* Transitions */
  --t-fast: .18s ease;
  --t-med: .32s ease;
}


/* =========================================================
   2) BASE / RESET
   ========================================================= */
*,
*::before,
*::after{
  box-sizing: border-box;
}

body{
  margin: 0;
  font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
  color: var(--text);
  background:
    radial-gradient(900px 380px at 20% -10%, rgba(59,130,246,.28), transparent 60%),
    radial-gradient(800px 360px at 85% 5%, rgba(34,211,238,.16), transparent 55%),
    radial-gradient(circle at top, #0b1024 0, #040610 55%, #000 100%);
  -webkit-font-smoothing: antialiased;
}

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

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

button{
  font: inherit;
  border: none;
  background: none;
  cursor: pointer;
}

main{
  padding-top: 90px;
}


/* =========================================================
   3) LAYOUT (container / grids)
   ========================================================= */
.container{
  width: min(1120px, 100% - 3rem);
  margin: 0 auto;
}


/* =========================================================
   4) GLOBAL SURFACES (cards / glass)
   ========================================================= */
.about-card,
.skills-group,
.project-card,
.contact-form,
.hero-card-body{
  background: var(--bg-card);
  border: 1px solid var(--border);
  box-shadow: var(--shadow);
  backdrop-filter: blur(14px);
}


/* =========================================================
   5) HEADER / NAV
   ========================================================= */
.header{
  position: fixed;
  inset: 0 0 auto 0;
  height: 70px;
  display: flex;
  align-items: center;
  z-index: 100;
  backdrop-filter: blur(16px);
  background: linear-gradient(
    180deg,
    rgba(15, 23, 42, 0.90),
    rgba(15, 23, 42, 0.75),
    transparent
  );
  border-bottom: 1px solid var(--border);
}

.header-content{
  display: flex;
  align-items: center;
  justify-content: center;
  height: 72px;
}

/* Desktop Nav */
.nav{
  display: flex;
  align-items: center;
  gap: 30px;
}

.nav-link{
  font-size: 14px;
  color: var(--muted);
  position: relative;
  padding-block: 2px;
  transition: color var(--t-fast);
}

.nav-link::after{
  content: "";
  position: absolute;
  left: 0;
  bottom: -6px;
  width: 0%;
  height: 2px;
  border-radius: 999px;
  background: linear-gradient(90deg, var(--blue), var(--cyan));
  transition: width var(--t-med);
}

.nav-link:hover{
  color: var(--text);
}

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

.nav-link.active::after{
  width: 18px;
}

/* Mobile Toggle */
.nav-toggle{
  display: none;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  align-items: center;
  justify-content: center;
  flex-direction: column;
  gap: 5px;
  padding: 0 2px;
}

.nav-toggle span{
  width: 20px;
  height: 2px;
  border-radius: 999px;
  background: var(--text);
  transition: transform var(--t-med), opacity var(--t-med), width var(--t-med);
}

.nav-toggle.open span:nth-child(1){
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle.open span:nth-child(2){
  opacity: 0;
  width: 0;
}

.nav-toggle.open span:nth-child(3){
  transform: translateY(-7px) rotate(-45deg);
}


/* =========================================================
   6) HERO
   ========================================================= */
.hero{
  padding: 80px 0 90px;
}

.hero-content{
  display: grid;
  grid-template-columns: minmax(0, 1.5fr) minmax(0, 1.1fr);
  gap: 50px;
  align-items: center;
}

.hero-eyebrow{
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: .16em;
  color: var(--blue-2);
  font-weight: 600;
  margin-bottom: 12px;
}

.hero h1{
  font-size: clamp(32px, 4vw, 40px);
  line-height: 1.15;
  margin: 0 0 16px;
}

.hero-subtitle{
  margin: 0 0 24px;
  color: var(--muted);
  max-width: 480px;
}

.hero-actions{
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 24px;
}

.hero-infos{
  display: grid;
  grid-template-columns: minmax(0,1fr) minmax(0,1fr);
  gap: 18px;
}

.hero-label{
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .12em;
  color: var(--muted);
}

.hero-value{
  display: block;
  margin-top: 4px;
  font-size: 13px;
}

/* Hero Card (typing area) */
.hero-card-body{
  border-radius: 20px;
  padding: 16px 14px 14px;
}

/* HERO AI CARD */
.hero-card-body{
  border-radius: 20px;
  padding: 16px 14px 14px;
}

.ai-bar{
  display: flex;
  gap: 10px;
  align-items: flex-start;
  padding: 12px 12px;
  border-radius: 16px;
  border: 1px solid rgba(148, 163, 184, .20);
  background: rgba(2,6,23,.35);
  transition: border-color var(--t-med), box-shadow var(--t-med), transform var(--t-med);
}

.ai-bar:hover{
  border-color: rgba(59,130,246,.35);
  box-shadow: 0 0 0 1px rgba(59,130,246,.18);
  transform: translateY(-1px);
}

.ai-icon{
  width: 18px;
  height: 18px;
  margin-top: 2px;
  color: var(--cyan);
  opacity: .95;
  flex: 0 0 auto;
}

.ai-content{
  display: grid;
  gap: 6px;
  min-width: 0;
  flex: 1;
}

.ai-top{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
}

.ai-label{
  font-size: 11px;
  letter-spacing: .14em;
  text-transform: uppercase;
  color: var(--blue-2);
  font-weight: 600;
}

.ai-kbd{
  font-size: 11px;
  color: var(--muted);
  border: 1px solid rgba(148, 163, 184, .22);
  background: rgba(2,6,23,.30);
  padding: 3px 8px;
  border-radius: 999px;
}

.ai-input{
  display: flex;
  gap: 8px;
  align-items: baseline;
  line-height: 1.3;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.ai-placeholder{
  color: rgba(229,231,235,.55);
  font-size: 13px;
}

.ai-query{
  color: var(--text);
  font-size: 13px;
  font-weight: 600;
}

.ai-result{
  display: flex;
  align-items: center;
  gap: 8px;
  margin-top: 12px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid rgba(148, 163, 184, .16);
  background: rgba(2,6,23,.22);
}

.ai-dot{
  width: 8px;
  height: 8px;
  border-radius: 999px;
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  box-shadow: 0 0 0 4px rgba(59,130,246,.12);
  flex: 0 0 auto;
}

.ai-suggestions{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 12px;
}



/* =========================================================
   7) BUTTONS
   ========================================================= */
.btn{
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  border-radius: var(--radius-full);
  padding: 10px 18px;
  font-size: 14px;
  font-weight: 500;
  border: 1px solid transparent;
  transition:
    transform .08s ease,
    filter var(--t-med),
    border-color var(--t-med),
    background var(--t-med),
    color var(--t-med);
}

.btn.primary{
  background: linear-gradient(135deg, var(--blue), var(--cyan));
  color: #06122b;
  box-shadow: 0 18px 35px rgba(59,130,246,.35);
}

.btn.primary:hover{
  filter: brightness(1.06);
  transform: translateY(-1px);
}

.btn.ghost{
  background: rgba(2,6,23,.35);
  border-color: var(--border);
  color: var(--muted);
}

.btn.ghost:hover{
  color: var(--text);
  border-color: var(--border-strong);
  background: rgba(2,6,23,.55);
}

.btn.secondary{
  background: rgba(2,6,23,.35);
  border-color: var(--border);
  color: var(--text);
}

.btn.secondary:hover{
  border-color: var(--border-strong);
}

.btn.full-width{
  width: 30%;
}

.btn.small{
  padding: 7px 14px;
  font-size: 13px;
}


/* =========================================================
   8) SECTIONS (generic)
   ========================================================= */
.section{
  padding: 60px 0;
}

.section-content{
  display: flex;
  flex-direction: column;
  gap: 28px;
}

.section-header{
  max-width: 620px;
}

.section-header.center{
  text-align: center;
  margin: 0 auto;
}

.section-eyebrow{
  font-size: 12px;
  text-transform: uppercase;
  letter-spacing: .14em;
  color: var(--blue-2);
  display: inline-block;
  margin-bottom: 10px;
}

.section h2{
  margin: 0 0 10px;
  font-size: 24px;
}

.section-header p{
  margin: 0;
  color: var(--muted);
  font-size: 14px;
}


/* =========================================================
   9) ABOUT
   ========================================================= */
.about{
  gap: 26px;
}

.about-grid{
  display: grid;
  grid-template-columns: repeat(4, minmax(0,1fr));
  gap: 16px;
}

.about-card{
  border-radius: var(--radius-md);
  padding: 16px 14px;
  font-size: 13px;
}

.about-card h3{
  margin: 0 0 6px;
  font-size: 14px;
}


/* =========================================================
   10) SKILLS (icons + chips)
   ========================================================= */
.skills-grid{
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 20px;
}

.skills-group{
  border-radius: var(--radius-lg);
  padding: 18px 16px;
}

.skills-title{
  display: flex;
  align-items: center;
  gap: 10px;
  margin: 0 0 14px;
  font-size: 15px;
}

.skills-title i{
  width: 18px;
  height: 18px;
  color: var(--blue-2);
}

.skills-icons{
  display: grid;
  grid-template-columns: repeat(2, minmax(0,1fr));
  gap: 10px;
  margin-bottom: 14px;
}

.tool{
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 10px 12px;
  border-radius: 14px;
  border: 1px solid var(--border);
  background: rgba(2,6,23,.35);
}

.tool i{
  width: 18px;
  height: 18px;
  color: var(--cyan);
  opacity: .95;
}

.tool span{
  font-size: 13px;
  color: var(--text);
}

.chips{
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
}

.chip{
  font-size: 12px;
  padding: 6px 10px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  background: rgba(59,130,246,.10);
  color: var(--text);
}


/* =========================================================
   11) PROJECTS
   ========================================================= */
.projects-grid{
  display: grid;
  grid-template-columns: repeat(3, minmax(0,1fr));
  gap: 20px;
}

.project-card{
  border-radius: var(--radius-lg);
  padding: 30px 16px 14px;
  position: relative;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.project-card h3{
  margin: 0;
  font-size: 16px;
}

.project-card p{
  margin: 0;
  font-size: 13px;
  color: var(--muted);
}

.project-tag{
  position: absolute;
  top: 14px;
  right: 14px;
  font-size: 11px;
  padding: 4px 10px;
  border-radius: var(--radius-full);
  background: rgba(59,130,246,.10);
  color: var(--blue-2);
  border: 1px solid var(--border-strong);
}

.project-meta{
  list-style: none;
  display: flex;
  flex-wrap: wrap;
  gap: 6px;
  padding: 0;
  margin: 4px 0 6px;
}

.project-meta li{
  font-size: 11px;
  padding: 4px 8px;
  border-radius: var(--radius-full);
  border: 1px solid var(--border);
  color: var(--text);
}

.project-actions{
  display: flex;
  gap: 10px;
  margin-top: 4px;
}


/* =========================================================
   12) CONTACT / FORM
   ========================================================= */
.contact{
  display: grid;
  grid-template-columns: minmax(0,1.2fr) minmax(0,1.3fr);
  gap: 32px;
}

.contact-info p{
  color: var(--muted);
  font-size: 14px;
}

.contact-list{
  list-style: none;
  padding: 0;
  margin: 16px 0 0;
  display: grid;
  gap: 6px;
  font-size: 14px;
}

.contact-list span{
  color: var(--muted);
}

.contact-form{
  border-radius: var(--radius-lg);
  padding: 18px 16px;
  display: grid;
  gap: 12px;
}

.form-group{
  display: grid;
  gap: 6px;
}

label{
  font-size: 13px;
  color: var(--muted);
}

input,
textarea{
  border-radius: 10px;
  border: 1px solid var(--border);
  background: rgba(2,6,23,.35);
  padding: 9px 10px;
  color: var(--text);
  font: inherit;
  outline: none;
  resize: vertical;
  min-height: 42px;
}

input:focus,
textarea:focus{
  border-color: var(--border-strong);
  box-shadow: 0 0 0 1px rgba(59,130,246,.25);
}

textarea{
  min-height: 90px;
}

.form-feedback{
  font-size: 13px;
  margin: 0;
  min-height: 18px;
}


/* =========================================================
   13) FOOTER
   ========================================================= */
.footer{
  border-top: 1px solid var(--border);
  padding: 18px 0 22px;
  background: rgba(2, 6, 23, 0.96);
}

.footer-content{
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  font-size: 12px;
  color: var(--muted);
}

.footer-secondary{
  opacity: .8;
}


/* =========================================================
   14) UTILITIES / EFFECTS
   ========================================================= */

/* Typing Cursor */
.cursor{
  display: inline-block;
  margin-left: 4px;
  animation: blink .9s infinite;
}

@keyframes blink{
  0%, 50%{ opacity: 1; }
  51%, 100%{ opacity: 0; }
}

/* Scroll Reveal */
.reveal{
  opacity: 0;
  transform: translateY(14px);
  transition: opacity .6s ease, transform .6s ease;
}

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


/* =========================================================
   15) RESPONSIVE
   ========================================================= */
@media (max-width: 900px){
  .nav{
    position: fixed;
    inset: 70px 16px auto 16px;
    background: rgba(2,6,23,.75);
    border-radius: 16px;
    border: 1px solid var(--border);
    flex-direction: column;
    padding: 10px 14px;
    gap: 8px;
    opacity: 0;
    pointer-events: none;
    transform: translateY(-8px);
    transition: opacity var(--t-med), transform var(--t-med);
  }

  .nav.open{
    opacity: 1;
    pointer-events: auto;
    transform: translateY(0);
  }

  .nav-toggle{
    display: inline-flex;
  }

  .hero{
    padding-top: 60px;
  }

  .hero-content{
    grid-template-columns: minmax(0,1fr);
  }

  .hero-infos{
    grid-template-columns: minmax(0,1fr);
  }

  .about-grid{
    grid-template-columns: repeat(2, minmax(0,1fr));
  }

  .skills-grid{
    grid-template-columns: repeat(2, minmax(0,1fr));
  }

  .projects-grid{
    grid-template-columns: repeat(2, minmax(0,1fr));
  }

  .contact{
    grid-template-columns: minmax(0,1fr);
  }

  .footer-content{
    flex-direction: column;
    align-items: flex-start;
  }
}

@media (max-width: 640px){
  .container{
    width: min(100% - 2rem, 480px);
  }

  .about-grid,
  .skills-grid,
  .projects-grid{
    grid-template-columns: minmax(0,1fr);
  }

  .header{
    height: 64px;
  }

  main{
    padding-top: 80px;
  }

  .hero{
    padding: 42px 0 60px;
  }

  .section{
    padding: 40px 0;
  }
}