/* ============================================================
   alierenyaman.com — style.css
   Palet: Derin / Kurşun / Çelik / Sis / Kar / Menekşe / Nane
   Tipografi: Sora (başlık) · IBM Plex Sans (gövde) · IBM Plex Mono (aksan)
   İmza: "git izi" — branch çizgisi + commit düğümleri
   ============================================================ */

:root {
  /* Renkler */
  --derin:   #0E1116;
  --kursun:  #161C26;
  --celik:   #2A3446;
  --sis:     #94A3B8;
  --kar:     #EDF2FA;
  --menekse: #7C8CF8;
  --nane:    #4ADEB8;
  --kirmizi: #F08080; /* yalnızca diff "-" satırı */

  /* Tipografi */
  --font-head: "Sora", sans-serif;
  --font-body: "IBM Plex Sans", sans-serif;
  --font-mono: "IBM Plex Mono", monospace;

  /* Ritim */
  --wrap: 68rem;
  --rail-w: 3.5rem;
  --radius: 14px;
  --ease: cubic-bezier(.22, 1, .36, 1);
}

/* ---------------------------------------------------------- Reset */
*, *::before, *::after { box-sizing: border-box; }

body {
  margin: 0;
  background: var(--derin);
  color: var(--sis);
  font-family: var(--font-body);
  font-size: 1.0625rem;
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3 {
  font-family: var(--font-head);
  color: var(--kar);
  line-height: 1.2;
  margin: 0 0 .5em;
}

p { margin: 0 0 1em; }
img { max-width: 100%; display: block; }
ul, ol { margin: 0; padding: 0; list-style: none; }

a {
  color: var(--menekse);
  text-decoration: none;
  text-underline-offset: 3px;
}
a:hover { text-decoration: underline; }

::selection { background: var(--menekse); color: var(--derin); }

/* Klavye odağı: her zaman görünür, tutarlı */
:focus-visible {
  outline: 2px solid var(--nane);
  outline-offset: 3px;
  border-radius: 4px;
}

.mono { font-family: var(--font-mono); font-size: .85em; }
.mono-dim { color: color-mix(in srgb, var(--sis) 65%, transparent); font-family: var(--font-mono); font-size: .85em; }

.visually-hidden {
  position: absolute; width: 1px; height: 1px;
  margin: -1px; padding: 0; border: 0;
  clip: rect(0 0 0 0); overflow: hidden; white-space: nowrap;
}

.skip-link {
  position: absolute; left: 1rem; top: -3rem;
  background: var(--menekse); color: var(--derin);
  padding: .5rem 1rem; border-radius: 0 0 8px 8px;
  font-weight: 600; z-index: 100;
  transition: top .2s var(--ease);
}
.skip-link:focus { top: 0; }

.wrap {
  max-width: var(--wrap);
  margin-inline: auto;
  padding-inline: clamp(1.25rem, 4vw, 2.5rem);
}

/* ---------------------------------------------------------- Header */
.site-header {
  position: sticky; top: 0; z-index: 50;
  background: color-mix(in srgb, var(--derin) 88%, transparent);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--celik);
}

.site-header__in {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; min-height: 3.75rem;
}

.brand {
  font-family: var(--font-mono); font-size: .95rem;
  color: var(--kar); white-space: nowrap;
}
.brand:hover { text-decoration: none; }
.brand__prompt { color: var(--nane); }
.brand__path { color: var(--sis); }
.brand__caret {
  display: inline-block; width: .55em; height: 1.1em;
  margin-left: .15em; vertical-align: text-bottom;
  background: var(--menekse);
  animation: caret 1.1s steps(1) infinite;
}
@keyframes caret { 50% { opacity: 0; } }

.site-nav { display: flex; align-items: center; gap: 1.5rem; }
.site-nav ul { display: flex; gap: .25rem; }

.site-nav a {
  display: inline-block; padding: .45rem .75rem;
  color: var(--sis); font-size: .95rem; font-weight: 500;
  border-radius: 8px;
  transition: color .2s, background-color .2s;
}
.site-nav a:hover { color: var(--kar); background: var(--kursun); text-decoration: none; }
.site-nav a[aria-current="page"] { color: var(--kar); }
.site-nav a[aria-current="page"]::after {
  content: ""; display: block; height: 2px; margin-top: 2px;
  background: linear-gradient(90deg, var(--menekse), var(--nane));
  border-radius: 2px;
}

.lang-switch { font-family: var(--font-mono); font-size: .85rem; }
.lang-switch a { color: var(--sis); padding: .3rem .4rem; border-radius: 6px; }
.lang-switch a[aria-current="true"] { color: var(--nane); font-weight: 600; }
.lang-switch span { color: var(--celik); }

.nav-toggle {
  display: none;
  background: none; border: 1px solid var(--celik); border-radius: 8px;
  width: 2.6rem; height: 2.6rem; cursor: pointer;
  position: relative;
}
.nav-toggle__bar,
.nav-toggle__bar::before,
.nav-toggle__bar::after {
  content: ""; position: absolute; left: 50%; translate: -50% 0;
  width: 1.15rem; height: 2px; background: var(--kar); border-radius: 2px;
  transition: all .25s var(--ease);
}
.nav-toggle__bar { top: calc(50% - 1px); }
.nav-toggle__bar::before { top: -6px; }
.nav-toggle__bar::after  { top: 6px; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar { background: transparent; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar::before { top: 0; rotate: 45deg; }
.nav-toggle[aria-expanded="true"] .nav-toggle__bar::after  { top: 0; rotate: -45deg; }

/* ---------------------------------------------------------- Git izi (imza öğesi) */
.git-rail {
  position: fixed; top: 0; bottom: 0;
  left: max(.75rem, calc((100vw - var(--wrap)) / 2 - var(--rail-w)));
  width: 2px; z-index: 10; pointer-events: none;
}
.git-rail__line {
  position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent, var(--celik) 12%, var(--celik) 88%, transparent);
}
.git-node {
  position: absolute; left: 50%; translate: -50% 0;
  width: 11px; height: 11px; border-radius: 50%;
  background: var(--derin); border: 2px solid var(--celik);
  transition: border-color .5s var(--ease), background-color .5s var(--ease), box-shadow .5s var(--ease);
}
.git-node--done {
  border-color: var(--menekse);
  background: var(--menekse);
  box-shadow: 0 0 12px color-mix(in srgb, var(--menekse) 55%, transparent);
}
@media (max-width: 1100px) { .git-rail { display: none; } }

/* ---------------------------------------------------------- Bölümler */
.section { padding-block: clamp(2.5rem, 7vh, 4.5rem); }

.page-label {
  color: var(--sis); font-size: .8rem; letter-spacing: .02em;
  margin-bottom: 1.25rem;
}
.page-label__branch { color: var(--nane); }

.page-title { font-size: clamp(2rem, 5vw, 2.8rem); font-weight: 700; }
.page-lead { max-width: 46rem; font-size: 1.1rem; }

.section__title {
  font-size: clamp(1.35rem, 3vw, 1.7rem); font-weight: 700;
  display: flex; align-items: baseline; gap: .5rem;
  margin-bottom: 1.5rem;
}
.section__hash { color: var(--menekse); font-size: .8em; }
.section__more { margin-top: 1.75rem; }

.arrow-link { font-weight: 600; }

/* ---------------------------------------------------------- Hero */
.hero { padding-top: clamp(3rem, 12vh, 6.5rem); }

.hero__title {
  font-size: clamp(2.4rem, 7vw, 4.2rem);
  font-weight: 800; letter-spacing: -.02em;
  margin-bottom: .35em;
}

.hero__role {
  font-family: var(--font-mono); font-size: clamp(.9rem, 2.2vw, 1.05rem);
  color: var(--nane); margin-bottom: 1em;
}

.hero__tagline { max-width: 40rem; font-size: 1.15rem; margin-bottom: 2em; }

.hero__actions { display: flex; flex-wrap: wrap; gap: .9rem; }

/* ---------------------------------------------------------- Butonlar */
.btn {
  display: inline-block; padding: .8rem 1.6rem;
  font-family: var(--font-head); font-size: .95rem; font-weight: 600;
  border-radius: 10px; border: 1px solid transparent;
  cursor: pointer; will-change: transform;
  transition: transform .2s var(--ease), background-color .2s, border-color .2s, box-shadow .2s;
}
.btn:hover { text-decoration: none; }

.btn--primary {
  background: var(--menekse); color: var(--derin);
}
.btn--primary:hover {
  box-shadow: 0 6px 24px color-mix(in srgb, var(--menekse) 35%, transparent);
}

.btn--ghost {
  background: transparent; color: var(--kar);
  border-color: var(--celik);
}
.btn--ghost:hover { border-color: var(--menekse); }

/* ---------------------------------------------------------- Kartlar */
.card-grid {
  display: grid; gap: 1.25rem;
  grid-template-columns: repeat(auto-fit, minmax(16rem, 1fr));
}
.card-grid--full { grid-template-columns: repeat(auto-fill, minmax(19rem, 1fr)); }

.card {
  display: flex; flex-direction: column;
  background: var(--kursun);
  border: 1px solid var(--celik);
  border-radius: var(--radius);
  padding: 1.5rem 1.5rem 1.1rem;
  transition: transform .25s var(--ease), border-color .25s;
}
.card:hover, .card:focus-within {
  transform: translateY(-4px);
  border-color: color-mix(in srgb, var(--menekse) 55%, var(--celik));
}

.card__title { font-size: 1.15rem; margin-bottom: .4em; }
.card__desc { font-size: .95rem; flex-grow: 1; }
.card__foot { margin-top: .25rem; font-size: .9rem; }

/* diff önizleme: hover/focus'ta açılır */
.card__diff {
  display: grid; grid-template-rows: 0fr; opacity: 0;
  margin-top: .35rem;
  transition: grid-template-rows .3s var(--ease), opacity .3s var(--ease), margin-top .3s var(--ease);
}
.card:hover .card__diff,
.card:focus-within .card__diff {
  grid-template-rows: 1fr; opacity: 1; margin-top: .9rem;
}
.card__diff-in { overflow: hidden; min-height: 0; }
.card__diff-in > span {
  display: block;
  font-size: .78rem; line-height: 1.9;
}
.card__diff { border-top: 1px dashed var(--celik); }
.diff-head { color: var(--menekse); opacity: .8; }
.diff-add { color: var(--nane); }
.diff-del { color: var(--kirmizi); }

/* ---------------------------------------------------------- Etiketler */
.tags { display: flex; flex-wrap: wrap; gap: .45rem; margin: .8rem 0 .6rem; }

.tag {
  padding: .22rem .6rem;
  font-size: .74rem;
  color: var(--nane);
  background: color-mix(in srgb, var(--nane) 9%, transparent);
  border: 1px solid color-mix(in srgb, var(--nane) 25%, transparent);
  border-radius: 999px;
  white-space: nowrap;
}

/* ---------------------------------------------------------- Yetenekler */
.skills { display: grid; gap: .7rem; }
.skills--wide {
  grid-template-columns: repeat(auto-fit, minmax(15rem, 1fr));
  gap: .9rem 2.5rem; max-width: 44rem;
}

.skill {
  display: flex; align-items: center; justify-content: space-between;
  gap: 1rem; padding: .35rem 0;
  border-bottom: 1px dashed var(--celik);
}
.skill__name { color: var(--kar); font-size: .9rem; }
.skill__dots { display: inline-flex; gap: .3rem; }

.dot {
  width: 8px; height: 8px; border-radius: 50%;
  background: var(--celik);
}
.dot--on { background: var(--menekse); }

/* "derleniyor" animasyonu: JS .compile-run ekler, noktalar sırayla yanar */
.js [data-compile] .skill { opacity: 0; translate: 0 8px; }
.js [data-compile].compile-run .skill {
  opacity: 1; translate: 0 0;
  transition: opacity .45s var(--ease), translate .45s var(--ease);
  transition-delay: var(--d, 0s);
}

/* ---------------------------------------------------------- Zaman çizelgesi */
.timeline-cmd { margin-bottom: 1.5rem; }

.timeline {
  position: relative;
  padding-left: 1.9rem;
  display: grid; gap: 2.2rem;
}
.timeline::before {
  content: ""; position: absolute; left: 5px; top: 6px; bottom: 6px;
  width: 2px;
  background: linear-gradient(180deg, var(--menekse), var(--celik));
}

.timeline__item { position: relative; }
.timeline__node {
  position: absolute; left: -1.9rem; top: 7px;
  width: 12px; height: 12px; border-radius: 50%;
  background: var(--derin); border: 2px solid var(--menekse);
}

.timeline__head {
  display: flex; flex-wrap: wrap; align-items: center;
  gap: .7rem; margin-bottom: .3rem;
}
.timeline__date { color: var(--sis); font-size: .8rem; }

.timeline__type {
  font-size: .7rem; padding: .12rem .55rem;
  border-radius: 999px; border: 1px solid var(--celik);
}
.type--work      { color: var(--menekse); border-color: color-mix(in srgb, var(--menekse) 40%, transparent); }
.type--edu       { color: var(--nane);    border-color: color-mix(in srgb, var(--nane) 40%, transparent); }
.type--volunteer { color: #E8B4F8;        border-color: #E8B4F855; }
.type--intern    { color: var(--sis);     border-color: var(--celik); }

.timeline__title { font-size: 1.1rem; margin-bottom: .15em; }
.timeline__org { margin-bottom: .4em; }
.timeline__desc { max-width: 42rem; font-size: .95rem; margin: 0; }

/* ---------------------------------------------------------- Etkinlikler */
.event-list { display: grid; gap: 1rem; }

.event {
  background: var(--kursun);
  border: 1px solid var(--celik);
  border-left: 3px solid var(--menekse);
  border-radius: var(--radius);
  padding: 1.4rem 1.6rem 1.1rem;
  transition: border-left-color .25s, transform .25s var(--ease);
}
.event:hover { border-left-color: var(--nane); transform: translateX(4px); }

.event__head {
  display: flex; flex-wrap: wrap; align-items: baseline;
  justify-content: space-between; gap: .5rem;
}
.event__name { font-size: 1.1rem; margin: 0; }
.event__date { color: var(--sis); font-size: .8rem; }
.event__role { color: var(--nane); font-size: .8rem; margin: .2em 0 .6em; }
.event__desc { max-width: 46rem; font-size: .95rem; margin: 0; }

/* ---------------------------------------------------------- Split / Hakkımda */
.split {
  display: grid; gap: 2.5rem;
  grid-template-columns: 1.4fr 1fr;
  align-items: start;
}
@media (max-width: 760px) { .split { grid-template-columns: 1fr; } }

.split__text { font-size: 1.05rem; max-width: 38rem; }
.split__subtitle {
  color: var(--kar); font-size: .85rem; font-weight: 500;
  text-transform: uppercase; letter-spacing: .12em;
  margin-bottom: 1rem;
}

.prose { max-width: 44rem; }
.prose strong { color: var(--kar); font-weight: 600; }

/* ---------------------------------------------------------- İletişim */
.split--contact { grid-template-columns: 1.3fr 1fr; }
@media (max-width: 760px) { .split--contact { grid-template-columns: 1fr; } }

.contact-form { display: grid; gap: 1.1rem; max-width: 34rem; }

.field { display: grid; gap: .4rem; margin: 0; }
.field label {
  font-family: var(--font-mono); font-size: .8rem; color: var(--kar);
}
.field input, .field textarea {
  width: 100%;
  background: var(--kursun);
  border: 1px solid var(--celik);
  border-radius: 10px;
  padding: .75rem .9rem;
  color: var(--kar);
  font-family: var(--font-body); font-size: 1rem;
  transition: border-color .2s;
}
.field input:hover, .field textarea:hover { border-color: color-mix(in srgb, var(--menekse) 40%, var(--celik)); }
.field input:focus-visible, .field textarea:focus-visible {
  outline: 2px solid var(--menekse); outline-offset: 0;
  border-color: var(--menekse);
}
.field textarea { resize: vertical; min-height: 8rem; }

.hp { position: absolute !important; left: -9999px; }

.form-note {
  padding: .8rem 1.1rem; border-radius: 10px;
  font-size: .95rem; margin-bottom: 1.4rem;
}
.form-note--ok  { background: color-mix(in srgb, var(--nane) 12%, transparent); color: var(--nane); border: 1px solid color-mix(in srgb, var(--nane) 35%, transparent); }
.form-note--err { background: color-mix(in srgb, var(--kirmizi) 12%, transparent); color: var(--kirmizi); border: 1px solid color-mix(in srgb, var(--kirmizi) 35%, transparent); }
.form-note--err a { color: inherit; text-decoration: underline; }

.contact-links { display: grid; gap: .8rem; }
.contact-links li {
  display: grid; grid-template-columns: 5.5rem 1fr; gap: 1rem;
  align-items: baseline;
  padding-bottom: .8rem; border-bottom: 1px dashed var(--celik);
}

/* ---------------------------------------------------------- Footer */
.site-footer {
  border-top: 1px solid var(--celik);
  margin-top: 3rem;
  padding-block: 2.2rem;
}
.site-footer__in {
  display: grid; gap: 1rem; justify-items: start;
}
.site-footer__note { color: var(--sis); margin: 0; }
.site-footer__links { display: flex; gap: 1.5rem; }
.site-footer__links a { font-size: .95rem; }
.site-footer__copy { color: color-mix(in srgb, var(--sis) 70%, transparent); margin: 0; font-size: .8rem; }

/* ---------------------------------------------------------- Reveal (scroll ile belirme) */
.js .reveal { opacity: 0; translate: 0 18px; }
.js .reveal.is-visible {
  opacity: 1; translate: 0 0;
  transition: opacity .6s var(--ease), translate .6s var(--ease);
  transition-delay: var(--d, 0s);
}

/* ---------------------------------------------------------- Mobil menü */
@media (max-width: 760px) {
  .nav-toggle { display: block; }

  .site-nav {
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: .5rem;
    background: var(--derin);
    border-bottom: 1px solid var(--celik);
    padding: 1rem clamp(1.25rem, 4vw, 2.5rem) 1.25rem;
    display: none;
  }
  .site-nav.open { display: flex; }
  .site-nav ul { flex-direction: column; gap: .15rem; }
  .site-nav a { display: block; padding: .7rem .75rem; }
  .lang-switch { padding: .5rem .75rem 0; }
}

/* ---------------------------------------------------------- Hareket azaltma */
@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after {
    animation-duration: .01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: .01ms !important;
  }
  .js .reveal, .js [data-compile] .skill { opacity: 1; translate: 0 0; }
  .card:hover, .event:hover { transform: none; }
  .brand__caret { animation: none; }
}