/* ============================================================
   Alper İlk — Kişisel Web Sitesi
   Design system: deniz-feneri (Bodensee) teması
   Navy + amber (gün batımı) + mavi · Bricolage Grotesque / IBM Plex Sans
   ============================================================ */

:root{
  --navy:#0a1727;
  --navy-2:#0f2135;
  --navy-3:#16304e;
  --blue:#2f6bd8;
  --blue-l:#6ea6f0;
  --amber:#e8a04e;
  --amber-d:#d4863a;
  --paper:#f5f2ea;
  --paper-2:#ffffff;
  --ink:#1a2634;
  --ink-2:#465464;
  --line:#e3ddd0;
  --line-dk:rgba(255,255,255,.10);
  --muted-dk:#9db0c6;

  --maxw:1180px;
  --r:16px;
  --r-lg:26px;
  --shadow:0 24px 60px -24px rgba(6,16,30,.45);
  --shadow-sm:0 10px 30px -14px rgba(6,16,30,.35);

  --f-display:'Bricolage Grotesque',Georgia,serif;
  --f-body:'IBM Plex Sans','Segoe UI',sans-serif;
  --f-sig:'Great Vibes',cursive;
  --f-mono:'IBM Plex Mono',monospace;
}

*{box-sizing:border-box;margin:0;padding:0;}
html{scroll-behavior:smooth;}
body{
  font-family:var(--f-body);
  color:var(--ink);
  background:var(--paper);
  line-height:1.6;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:inherit;text-decoration:none;}
img{max-width:100%;display:block;}
ul{list-style:none;}

.wrap{max-width:var(--maxw);margin:0 auto;padding:0 24px;}
.section{padding:92px 0;}
.section.tight{padding:64px 0;}

/* ---------- Type ---------- */
h1,h2,h3,h4{font-family:var(--f-display);font-weight:700;line-height:1.05;letter-spacing:-.02em;color:var(--navy);}
.dark h1,.dark h2,.dark h3,.dark h4{color:#fff;}
.eyebrow{
  font-family:var(--f-mono);font-size:.72rem;font-weight:500;
  letter-spacing:.28em;text-transform:uppercase;color:var(--amber-d);
  display:inline-flex;align-items:center;gap:10px;margin-bottom:18px;
}
.eyebrow::before{content:"";width:26px;height:1px;background:var(--amber-d);display:inline-block;}
.dark .eyebrow{color:var(--amber);}
.dark .eyebrow::before{background:var(--amber);}
.lead{font-size:1.15rem;color:var(--ink-2);max-width:60ch;}
.dark .lead{color:var(--muted-dk);}

/* ---------- Buttons ---------- */
.btn{
  display:inline-flex;align-items:center;gap:10px;
  font-family:var(--f-body);font-weight:600;font-size:.95rem;
  padding:14px 26px;border-radius:100px;border:1.5px solid transparent;
  cursor:pointer;transition:transform .25s ease,box-shadow .25s ease,background .25s ease,color .25s ease;
}
.btn svg{width:17px;height:17px;stroke:currentColor;fill:none;stroke-width:2;stroke-linecap:round;stroke-linejoin:round;}
.btn-primary{background:var(--amber);color:#20140a;box-shadow:0 12px 26px -12px rgba(232,160,78,.7);}
.btn-primary:hover{transform:translateY(-3px);box-shadow:0 18px 34px -12px rgba(232,160,78,.85);}
.btn-ghost{border-color:rgba(255,255,255,.28);color:#fff;}
.btn-ghost:hover{background:rgba(255,255,255,.08);transform:translateY(-3px);}
.btn-dark{background:var(--navy);color:#fff;}
.btn-dark:hover{transform:translateY(-3px);box-shadow:var(--shadow-sm);}

/* ---------- Nav ---------- */
.nav{
  position:fixed;top:0;left:0;right:0;z-index:100;
  display:flex;align-items:center;justify-content:space-between;
  padding:18px 34px;transition:background .3s ease,padding .3s ease,box-shadow .3s ease;
}
.nav.scrolled{background:rgba(10,23,39,.86);backdrop-filter:blur(14px);padding:12px 34px;box-shadow:0 1px 0 var(--line-dk);}
.nav .brand{font-family:var(--f-sig);font-size:1.9rem;color:#fff;line-height:1;}
.nav .brand small{display:block;font-family:var(--f-mono);font-size:.52rem;letter-spacing:.35em;text-transform:uppercase;color:var(--amber);margin-top:-2px;}
.nav-links{display:flex;align-items:center;gap:6px;}
.nav-links a{
  font-size:.9rem;font-weight:500;color:#dfe7f1;padding:9px 15px;border-radius:100px;
  transition:color .2s,background .2s;
}
.nav-links a:hover{color:#fff;background:rgba(255,255,255,.08);}
.nav-links a.active{color:var(--amber);}
.nav-links .btn{margin-left:10px;padding:10px 20px;}
.nav-toggle{display:none;background:none;border:0;cursor:pointer;width:40px;height:40px;}
.nav-toggle span{display:block;width:24px;height:2px;background:#fff;margin:5px auto;border-radius:2px;transition:.3s;}

/* ---------- Hero ---------- */
.hero{position:relative;background:radial-gradient(120% 90% at 80% -10%,var(--navy-3),var(--navy) 55%);color:#fff;overflow:hidden;}
.hero::after{ /* sea horizon glow */
  content:"";position:absolute;left:-10%;right:-10%;bottom:-40%;height:70%;
  background:radial-gradient(60% 100% at 50% 0,rgba(232,160,78,.16),transparent 70%);
  pointer-events:none;
}
.hero-grid{display:grid;grid-template-columns:1.15fr .85fr;gap:56px;align-items:center;padding:150px 0 110px;}
.hero h1{font-size:clamp(2.6rem,6vw,4.6rem);}
.hero h1 .amber{color:var(--amber);}
.hero .role{font-family:var(--f-mono);font-size:.9rem;letter-spacing:.05em;color:var(--blue-l);margin:22px 0 20px;}
.hero .lead{margin-bottom:34px;}
.hero-cta{display:flex;gap:14px;flex-wrap:wrap;}
.hero-meta{display:flex;gap:26px;margin-top:42px;flex-wrap:wrap;}
.hero-meta .m b{font-family:var(--f-display);font-size:1.9rem;color:#fff;display:block;line-height:1;}
.hero-meta .m span{font-size:.78rem;color:var(--muted-dk);letter-spacing:.04em;}

.portrait{position:relative;justify-self:center;}
.portrait img{
  width:340px;height:420px;object-fit:cover;object-position:center top;
  border-radius:var(--r-lg);border:1px solid rgba(255,255,255,.12);
  box-shadow:var(--shadow);
}
.portrait .ring{position:absolute;inset:-16px;border:1.5px solid rgba(232,160,78,.4);border-radius:calc(var(--r-lg) + 16px);z-index:-1;}
.portrait .tag{
  position:absolute;bottom:22px;left:-26px;background:rgba(10,23,39,.9);backdrop-filter:blur(6px);
  border:1px solid var(--line-dk);border-radius:14px;padding:12px 18px;box-shadow:var(--shadow-sm);
}
.portrait .tag b{font-family:var(--f-display);color:#fff;font-size:.98rem;display:block;}
.portrait .tag span{font-size:.72rem;color:var(--amber);font-family:var(--f-mono);letter-spacing:.06em;}

/* lighthouse mini mark */
.lh{width:22px;height:28px;flex:0 0 auto;}

/* ---------- Generic dark / light bands ---------- */
.dark{background:var(--navy);color:#e8eef6;}
.band-amber{background:linear-gradient(120deg,var(--amber),var(--amber-d));color:#20140a;}

/* ---------- Section head ---------- */
.shead{max-width:56ch;margin-bottom:52px;}
.shead h2{font-size:clamp(1.9rem,4vw,2.9rem);}
.shead p{margin-top:16px;color:var(--ink-2);}
.dark .shead p{color:var(--muted-dk);}

/* ---------- Cards grid ---------- */
.grid{display:grid;gap:22px;}
.g-2{grid-template-columns:repeat(2,1fr);}
.g-3{grid-template-columns:repeat(3,1fr);}
.g-4{grid-template-columns:repeat(4,1fr);}

.card{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r);
  padding:30px 28px;transition:transform .3s ease,box-shadow .3s ease,border-color .3s;
}
.card:hover{transform:translateY(-6px);box-shadow:var(--shadow-sm);border-color:#d8cfbe;}
.card .ico{
  width:50px;height:50px;border-radius:14px;background:var(--navy);color:var(--amber);
  display:flex;align-items:center;justify-content:center;margin-bottom:20px;
}
.card .ico svg{width:24px;height:24px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.card h3{font-size:1.25rem;margin-bottom:10px;}
.card p{color:var(--ink-2);font-size:.95rem;}
.card .num{font-family:var(--f-mono);font-size:.78rem;color:var(--amber-d);letter-spacing:.1em;}

/* project card */
.proj{
  background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r-lg);overflow:hidden;
  display:flex;flex-direction:column;transition:transform .3s,box-shadow .3s;
}
.proj:hover{transform:translateY(-6px);box-shadow:var(--shadow);}
.proj .top{padding:30px 28px 22px;background:linear-gradient(160deg,var(--navy-2),var(--navy));color:#fff;position:relative;}
.proj .top .cat{font-family:var(--f-mono);font-size:.72rem;letter-spacing:.18em;text-transform:uppercase;color:var(--amber);}
.proj .top h3{color:#fff;font-size:1.4rem;margin-top:8px;}
.proj .body{padding:24px 28px 30px;}
.proj .body li{position:relative;padding-left:22px;margin-bottom:10px;color:var(--ink-2);font-size:.93rem;}
.proj .body li::before{content:"";position:absolute;left:0;top:9px;width:8px;height:8px;border-radius:50%;background:var(--blue);}

/* ---------- Timeline ---------- */
.tl{position:relative;margin-left:8px;}
.tl::before{content:"";position:absolute;left:7px;top:6px;bottom:6px;width:2px;background:var(--line);}
.dark .tl::before{background:var(--line-dk);}
.tl-item{position:relative;padding:0 0 34px 40px;}
.tl-item::before{content:"";position:absolute;left:0;top:4px;width:16px;height:16px;border-radius:50%;background:var(--paper);border:3px solid var(--amber);}
.dark .tl-item::before{background:var(--navy);}
.tl-item .yr{font-family:var(--f-mono);font-size:.78rem;letter-spacing:.06em;color:var(--amber-d);}
.dark .tl-item .yr{color:var(--amber);}
.tl-item h3{font-size:1.2rem;margin:5px 0 3px;}
.tl-item .org{font-size:.9rem;color:var(--blue);font-weight:600;margin-bottom:8px;}
.tl-item p,.tl-item li{color:var(--ink-2);font-size:.93rem;}
.dark .tl-item p,.dark .tl-item li,.dark .tl-item .org{color:var(--muted-dk);}
.tl-item li{position:relative;padding-left:18px;margin-bottom:5px;}
.tl-item li::before{content:"";position:absolute;left:0;top:9px;width:6px;height:6px;border-radius:50%;background:var(--blue);}

/* ---------- Skill columns ---------- */
.skills{display:grid;grid-template-columns:repeat(4,1fr);gap:20px;}
.skcol{background:var(--paper-2);border:1px solid var(--line);border-radius:var(--r);padding:24px 22px;}
.skcol .h{font-family:var(--f-display);font-weight:700;font-size:1.05rem;color:var(--navy);margin-bottom:14px;display:flex;align-items:center;gap:9px;}
.skcol .h i{width:9px;height:9px;border-radius:50%;background:var(--amber);display:inline-block;}
.skcol li{position:relative;padding-left:18px;font-size:.9rem;color:var(--ink-2);margin-bottom:8px;}
.skcol li::before{content:"";position:absolute;left:0;top:8px;width:6px;height:6px;border-radius:2px;background:var(--blue);}

/* ---------- Chips / lang bars ---------- */
.chips{display:flex;flex-wrap:wrap;gap:10px;}
.chip{font-size:.85rem;font-weight:500;padding:8px 16px;border-radius:100px;background:var(--paper-2);border:1px solid var(--line);color:var(--ink-2);}
.dark .chip{background:rgba(255,255,255,.05);border-color:var(--line-dk);color:#dfe7f1;}

.lang{margin-bottom:20px;}
.lang .t{display:flex;justify-content:space-between;margin-bottom:8px;font-size:.95rem;}
.lang .t b{font-family:var(--f-display);}
.lang .t span{color:var(--ink-2);font-size:.85rem;}
.dark .lang .t span{color:var(--muted-dk);}
.bar{height:8px;border-radius:100px;background:var(--line);overflow:hidden;}
.dark .bar{background:rgba(255,255,255,.09);}
.bar i{display:block;height:100%;border-radius:100px;background:linear-gradient(90deg,var(--blue),var(--amber));}

/* ---------- Contact ---------- */
.contact-grid{display:grid;grid-template-columns:.9fr 1.1fr;gap:48px;align-items:start;}
.ctile{display:flex;gap:16px;align-items:flex-start;padding:20px 0;border-bottom:1px solid var(--line-dk);}
.ctile .ic{width:46px;height:46px;flex:0 0 auto;border-radius:12px;background:rgba(232,160,78,.14);color:var(--amber);display:flex;align-items:center;justify-content:center;}
.ctile .ic svg{width:20px;height:20px;stroke:currentColor;fill:none;stroke-width:1.8;stroke-linecap:round;stroke-linejoin:round;}
.ctile .l{font-family:var(--f-mono);font-size:.72rem;letter-spacing:.14em;text-transform:uppercase;color:var(--muted-dk);}
.ctile .v{font-size:1.02rem;color:#fff;font-weight:500;}
.ctile .v:hover{color:var(--amber);}

.form{background:rgba(255,255,255,.04);border:1px solid var(--line-dk);border-radius:var(--r-lg);padding:32px;}
.form .row{display:grid;grid-template-columns:1fr 1fr;gap:16px;}
.field{margin-bottom:16px;}
.field label{display:block;font-size:.8rem;color:var(--muted-dk);margin-bottom:7px;font-family:var(--f-mono);letter-spacing:.04em;}
.field input,.field textarea{
  width:100%;background:rgba(255,255,255,.05);border:1px solid var(--line-dk);border-radius:12px;
  padding:13px 15px;color:#fff;font-family:var(--f-body);font-size:.95rem;transition:border-color .2s,background .2s;
}
.field input:focus,.field textarea:focus{outline:none;border-color:var(--amber);background:rgba(255,255,255,.08);}
.field textarea{resize:vertical;min-height:120px;}

/* ---------- Footer ---------- */
.footer{background:#06101d;color:#c6d2e0;padding:60px 0 28px;}
.footer-grid{display:grid;grid-template-columns:1.4fr 1fr 1fr;gap:40px;padding-bottom:40px;border-bottom:1px solid var(--line-dk);}
.footer .brand{font-family:var(--f-sig);font-size:2rem;color:#fff;}
.footer p{color:var(--muted-dk);font-size:.92rem;margin-top:10px;max-width:34ch;}
.footer h4{color:#fff;font-size:.8rem;letter-spacing:.16em;text-transform:uppercase;font-family:var(--f-mono);margin-bottom:16px;font-weight:500;}
.footer a{display:block;color:#c6d2e0;font-size:.92rem;margin-bottom:10px;transition:color .2s;}
.footer a:hover{color:var(--amber);}
.footer .copy{padding-top:24px;display:flex;justify-content:space-between;flex-wrap:wrap;gap:10px;font-size:.82rem;color:var(--muted-dk);}

/* ---------- Reveal on scroll ---------- */
.reveal{opacity:0;transform:translateY(26px);transition:opacity .7s ease,transform .7s ease;}
.reveal.in{opacity:1;transform:none;}

/* ---------- Responsive ---------- */
@media(max-width:900px){
  .hero-grid{grid-template-columns:1fr;text-align:center;padding:130px 0 80px;}
  .hero .lead{margin-inline:auto;}
  .hero-cta,.hero-meta{justify-content:center;}
  .portrait{order:-1;margin-bottom:20px;}
  .portrait .tag{left:50%;transform:translateX(-50%);bottom:-18px;}
  .g-3,.g-4,.skills,.contact-grid,.footer-grid,.hero-meta{grid-template-columns:1fr;}
  .g-2{grid-template-columns:1fr;}
  .skills{grid-template-columns:repeat(2,1fr);}
  .form .row{grid-template-columns:1fr;}
}
@media(max-width:640px){
  .section{padding:64px 0;}
  .nav{padding:14px 20px;}
  .nav-links{
    position:fixed;top:0;right:0;height:100vh;width:min(78vw,320px);
    flex-direction:column;align-items:flex-start;justify-content:center;gap:6px;
    background:rgba(8,18,32,.98);backdrop-filter:blur(16px);padding:40px 34px;
    transform:translateX(100%);transition:transform .35s ease;
  }
  .nav-links.open{transform:none;}
  .nav-links a{width:100%;font-size:1.05rem;padding:12px 14px;}
  .nav-toggle{display:block;z-index:110;}
  .nav-toggle.open span:nth-child(1){transform:translateY(7px) rotate(45deg);}
  .nav-toggle.open span:nth-child(2){opacity:0;}
  .nav-toggle.open span:nth-child(3){transform:translateY(-7px) rotate(-45deg);}
  .portrait img{width:280px;height:350px;}
  .skills{grid-template-columns:1fr;}
}