/* Color system */
:root {
    --bg: #0f172a;              /* soft-dark arka plan (slate) */
    --surface: #1a2446;         /* kart yüzeyi (bir ton açık) */
    --muted: #243156;           /* ara tonlar */
    --primary: #4f46e5;         /* indigo */
    --accent: #06b6d4;          /* aqua vurgu */
    --text: #e8f0ff;            /* açık metin */
    --text-dim: #a9b7d9;        /* ikincil metin */
    --error: #ef4444;

    --container: 1160px;
    --radius: 12px;
    --shadow-1: 0 10px 30px rgba(0, 8, 20, .32);
}

/* Base */
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji";
    color: var(--text);
    background: radial-gradient(1100px 700px at 20% -10%, rgba(79,70,229,.12), transparent 60%),
                radial-gradient(900px 540px at 90% 10%, rgba(6,182,212,.10), transparent 60%),
                var(--bg);
    line-height: 1.6;
}

.container { max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section.alt { background: linear-gradient(0deg, rgba(255,255,255,0.02), rgba(255,255,255,0.02)) ,transparent; }
.section-title { margin-bottom: 24px; }
.section-title h2 { margin: 0 0 4px; letter-spacing: .3px; font-size: 32px; }
.section-title .subtitle { margin: 0; color: var(--text-dim); font-size: 14px; }
.grid.two { display: grid; grid-template-columns: 1fr 1.2fr; gap: 32px; align-items: start; }

@media (max-width: 960px) { .grid.two { grid-template-columns: 1fr; } }

/* Header */
.site-header { position: sticky; top: 0; z-index: 50; backdrop-filter: saturate(140%) blur(12px); background: rgba(15,23,42,.72); border-bottom: 1px solid rgba(255,255,255,.06); }
.nav { display: flex; align-items: center; justify-content: space-between; height: 64px; }
.logo { color: var(--text); font-weight: 800; letter-spacing: 1px; text-decoration: none; }
.menu { display: flex; gap: 20px; list-style: none; padding: 0; margin: 0; }
.menu a { color: var(--text-dim); text-decoration: none; padding: 8px 10px; border-radius: 8px; }
.menu a:hover, .menu a:focus { color: var(--text); background: rgba(255,255,255,.06); outline: none; }
.nav-toggle { display: none; background: none; border: 0; cursor: pointer; }
.nav-toggle .bar { display: block; width: 22px; height: 2px; background: var(--text); margin: 5px 0; border-radius: 2px; }

@media (max-width: 800px) {
    .nav-toggle { display: block; }
    .menu { position: absolute; right: 24px; top: 64px; background: rgba(12,18,43,.95); border: 1px solid rgba(255,255,255,.08); border-radius: 12px; padding: 10px; flex-direction: column; gap: 0; width: min(240px, calc(100% - 48px)); transform-origin: top right; transform: scale(.98); opacity: 0; pointer-events: none; transition: .2s ease; }
    .menu.open { transform: scale(1); opacity: 1; pointer-events: auto; }
    .menu a { display: block; padding: 12px 10px; }
}

/* Hero / Slider */
.hero { position: relative; min-height: calc(100dvh - 64px); display: grid; place-items: center; overflow: hidden; margin-top: -1px; }
.slider { position: relative; width: 100%; overflow: hidden; }
.slider-track { display: flex; transition: transform .7s cubic-bezier(.22,.61,.36,1); will-change: transform; backface-visibility: hidden; transform: translate3d(0,0,0); }
.slide { position: relative; min-width: 100%; height: clamp(520px, calc(100dvh - 64px), 820px); display: grid; place-items: center; overflow: hidden; }
.slide-content { position: relative; text-align: center; z-index: 2; }
.slide-content { will-change: transform; }
@media (min-width: 900px) {
    .slide-content { transform: translateY(-6vh); }
}
.slide-content h1, .slide-content h2 { margin: 0 0 12px; font-size: clamp(28px, 4.2vw, 52px); }
.slide-content p { margin: 0 0 24px; color: var(--text-dim); font-size: clamp(14px, 1.5vw, 18px); }
.slide-bg { position: absolute; inset: -2%; z-index: 1; transform: translate3d(0,0,0);
    background: linear-gradient(160deg, rgba(14,20,40, .85) 0%, rgba(10,16,36, .75) 70%),
                radial-gradient(700px 360px at 25% 25%, rgba(34,211,238,.18), transparent 70%),
                conic-gradient(from 220deg at 70% 40%, rgba(45,108,223,.16), transparent 40%),
                linear-gradient(160deg, rgba(21,28,54,1) 0%, rgba(14,20,40,1) 70%);
}
.slide-bg.with-photo { background-image: linear-gradient(160deg, rgba(14,20,40,.78) 0%, rgba(10,16,36,.62) 70%), var(--slide-photo);
    background-size: cover; background-position: var(--bg-pos, center 0%); background-repeat: no-repeat; }

.slider-control { position: absolute; top: 50%; transform: translateY(-50%); width: 44px; height: 44px; border-radius: 50%; border: 1px solid rgba(255,255,255,.2); background: rgba(12,18,43,.6); backdrop-filter: blur(6px); cursor: pointer; z-index: 3; display: grid; place-items: center; transition: .2s ease; pointer-events: auto; }
.slider-control::before { content: ''; display: block; width: 10px; height: 10px; border-top: 2px solid var(--text); border-right: 2px solid var(--text); transform: rotate(45deg); }
.slider-control.prev { left: 18px; }
.slider-control.prev::before { transform: rotate(-135deg); }
.slider-control.next { right: 18px; }
.slider-control:hover { background: rgba(12,18,43,.8); }

.slider-dots { position: absolute; bottom: 18px; left: 50%; transform: translateX(-50%); display: flex; gap: 8px; z-index: 3; pointer-events: auto; }
.slider-dots button { width: 8px; height: 8px; border-radius: 999px; border: 0; background: rgba(255,255,255,.38); cursor: pointer; transition: width .2s ease, background .2s ease; }
.slider-dots button[aria-selected="true"] { width: 28px; background: var(--primary); }

.cta { display: inline-flex; gap: 12px; }
.btn { display: inline-block; padding: 12px 16px; border-radius: 10px; text-decoration: none; font-weight: 600; border: 1px solid transparent; }
.btn.primary { background: var(--primary); color: #ffffff; box-shadow: 0 6px 20px rgba(79,70,229,.28); }
.btn.ghost { background: transparent; border-color: rgba(255,255,255,.2); color: var(--text); }
.btn:hover { filter: brightness(1.05); }

.cta-box { padding: 18px; border-radius: var(--radius); background: rgba(26,36,70,.72); border: 1px solid rgba(255,255,255,.1); box-shadow: var(--shadow-1); }
.cta-actions { display: flex; gap: 12px; flex-wrap: wrap; }

/* Contact form */
.contact-form { display: grid; gap: 12px; margin-top: 8px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }
.field { display: grid; gap: 6px; }
.field.full { grid-column: 1 / -1; }
.field label { font-size: 12px; color: var(--text-dim); }
.field input, .field textarea { width: 100%; padding: 10px 12px; border-radius: 10px; border: 1px solid rgba(255,255,255,.12); background: rgba(255,255,255,.04); color: var(--text); }
.field input::placeholder, .field textarea::placeholder { color: rgba(255,255,255,.4); }
.field input:focus, .field textarea:focus { outline: 2px solid var(--primary); outline-offset: 0; border-color: transparent; }
.form-actions { display: flex; align-items: center; gap: 12px; }
#cf-status { font-size: 12px; color: var(--text-dim); }

@media (max-width: 720px) { .form-row { grid-template-columns: 1fr; } }

/* LinkedIn hero card */
.social-proof { margin-top: 18px; display: grid; gap: 12px; justify-items: center; }
.linkedin-card { display: grid; grid-template-columns: 56px 1fr 20px; align-items: center; gap: 12px; padding: 12px; border-radius: 14px; text-decoration: none; color: var(--text); background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.08); backdrop-filter: blur(6px); transition: transform .2s ease, background .2s ease; }
.linkedin-card:hover { transform: translateY(-2px); background: rgba(255,255,255,.08); }
.linkedin-card .avatar { width: 56px; height: 56px; border-radius: 50%; display: grid; place-items: center; font-weight: 800; background: linear-gradient(135deg, var(--primary), #7ee3e1); color: #0a1026; }
.linkedin-card .meta { display: grid; }
.linkedin-card .meta strong { font-size: 16px; }
.linkedin-card .meta span { font-size: 12px; color: var(--text-dim); }
.linkedin-card .pill { margin-top: 4px; display: inline-block; padding: 4px 8px; border-radius: 999px; background: rgba(91,192,190,.18); color: var(--text); border: 1px solid rgba(91,192,190,.3); }
.linkedin-card .arrow { width: 8px; height: 8px; border-top: 2px solid var(--text); border-right: 2px solid var(--text); transform: rotate(45deg); justify-self: end; }

.trust-row { display: flex; gap: 10px; flex-wrap: wrap; justify-content: center; color: var(--text-dim); font-size: 12px; }
.trust-row span { padding: 6px 10px; border-radius: 999px; background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.08); }

.scroll-cue { position: absolute; bottom: 16px; left: 50%; transform: translateX(-50%); width: 28px; height: 48px; border-radius: 20px; border: 2px solid rgba(255,255,255,.3); display: grid; place-items: start center; padding-top: 6px; opacity: .8; }
.scroll-cue span { width: 6px; height: 6px; background: var(--text); border-radius: 999px; animation: cue 1.6s infinite; }
@keyframes cue { 0%{ transform: translateY(0);} 60%{ transform: translateY(18px);} 100%{ transform: translateY(0);} }

/* Content */
.keylines { padding-left: 18px; margin: 12px 0 0; }
.keylines li { margin: 6px 0; }

.timeline { display: grid; gap: 18px; }
.item { padding: 16px; border-radius: var(--radius); background: rgba(27,36,66,.7); border: 1px solid rgba(255,255,255,.08); box-shadow: var(--shadow-1);
}
.item .meta { color: var(--text-dim); margin-top: -6px; margin-bottom: 8px; }

.skills-list { display: flex; flex-wrap: wrap; gap: 10px; list-style: none; padding: 0; margin: 0; }
.skills-list li { padding: 8px 12px; border-radius: 999px; background: rgba(91,192,190,.15); color: var(--text); border: 1px solid rgba(91,192,190,.2); }

.projects-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 18px; }
.card { padding: 18px; border-radius: var(--radius); background: rgba(27,36,66,.7); border: 1px solid rgba(255,255,255,.08); box-shadow: var(--shadow-1); }

@media (max-width: 960px) { .projects-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 640px) { .projects-grid { grid-template-columns: 1fr; } }

/* Footer */
.site-footer { padding: 28px 0; border-top: 1px solid rgba(255,255,255,.06); background: rgba(18,26,47,.7); backdrop-filter: blur(8px); }
.site-footer p { margin: 0; text-align: center; color: var(--text-dim); }

/* Reveal on scroll */
.reveal { opacity: 0; transform: translateY(12px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in-view { opacity: 1; transform: translateY(0); }

/* Accessibility helpers */
:focus-visible { outline: 2px dashed var(--accent); outline-offset: 2px; }

/* Scroll margins for anchor targets (sticky header offset) */
section[id] { scroll-margin-top: 80px; }