/* E2CE – Base design tokens + light/dark theme + components
   - Bootstrap ile birlikte çalışır (override etmez, tamamlar)
   - Sadece CSS değişiklik; HTML’de sınıf eklemek yeterli
*/

/* ====== Tokens ====== */
:root {
  --e2-font-sans: ui-sans-serif, system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, "Noto Sans", "Apple Color Emoji", "Segoe UI Emoji", "Segoe UI Symbol";
  --e2-radius: 14px;
  --e2-shadow: 0 10px 25px rgba(0, 0, 0, .06);

  /* light */
  --e2-bg: #ffffff;
  --e2-surface: #f7f7f9;
  --e2-card: #ffffff;
  --e2-text: #101114;
  --e2-muted: #61646b;
  --e2-border: #e6e7eb;
  --e2-primary: #3B82F6;
  /* blue-500 */
  --e2-primary-600: #2563EB;
  --e2-accent: #22c55e;
  /* green-500 */
  --e2-link: #2563EB;
}

:root[data-theme="dark"] {
  --e2-bg: #0b0d12;
  --e2-surface: #10131a;
  --e2-card: #131722;
  --e2-text: #e8eaf1;
  --e2-muted: #9aa3b2;
  --e2-border: #202534;
  --e2-primary: #60A5FA;
  --e2-primary-600: #3B82F6;
  --e2-accent: #34d399;
  --e2-link: #93c5fd;
}

/* ====== Base ====== */
html {
  scroll-behavior: smooth
}

body {
  font-family: var(--e2-font-sans);
  background: var(--e2-bg);
  color: var(--e2-text);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* links */
a {
  color: var(--e2-link);
  text-decoration: none
}

a:hover {
  text-decoration: underline
}

/* container helpers */
.e2-container {
  max-width: 1150px;
  margin-inline: auto;
  padding-inline: 1rem
}

/* headings */
h1,
h2,
h3 {
  letter-spacing: -.02em
}

h1 {
  font-weight: 800;
  font-size: clamp(2rem, 1.2rem + 2vw, 3rem)
}

h2 {
  font-weight: 700;
  font-size: clamp(1.5rem, 1.1rem + 1.2vw, 2.2rem)
}

h3 {
  font-weight: 700;
  font-size: clamp(1.25rem, 1rem + .8vw, 1.6rem)
}

/* text */
.lead {
  color: var(--e2-muted);
  font-size: 1.125rem
}

/* buttons */
.e2-btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  background: var(--e2-primary);
  color: #fff;
  border: 0;
  padding: .7rem 1rem;
  border-radius: var(--e2-radius);
  box-shadow: var(--e2-shadow);
  transition: transform .08s ease, filter .15s ease, background .2s ease;
}

.e2-btn:hover {
  text-decoration: none;
  filter: brightness(1.05)
}

.e2-btn:active {
  transform: translateY(1px)
}

.e2-btn.outline {
  background: transparent;
  color: var(--e2-primary);
  border: 1px solid var(--e2-border);
}

.e2-btn.ghost {
  background: transparent;
  color: var(--e2-text);
}

/* tags / badges */
.e2-tag {
  display: inline-block;
  font-size: .8rem;
  padding: .25rem .55rem;
  background: var(--e2-surface);
  color: var(--e2-muted);
  border: 1px solid var(--e2-border);
  border-radius: 999px;
}

/* cards */
.e2-card {
  background: var(--e2-card);
  border: 1px solid var(--e2-border);
  border-radius: var(--e2-radius);
  box-shadow: var(--e2-shadow);
  overflow: hidden;
}

.e2-card .cover {
  aspect-ratio: 16/9;
  width: 100%;
  object-fit: cover;
  background: #000;
}

.e2-card .pad {
  padding: 1rem 1rem 1.1rem
}

/* article body */
.article {
  --art-w: 740px;
  max-width: var(--art-w);
  margin-inline: auto;
  font-size: 1.06rem;
  line-height: 1.75;
}

.article p {
  margin: 1rem 0
}

.article img {
  max-width: 100%;
  border-radius: 10px
}

.article blockquote {
  margin: 1.2rem 0;
  padding: .8rem 1rem;
  background: var(--e2-surface);
  border-left: 4px solid var(--e2-primary);
  color: var(--e2-muted)
}

.article h2 {
  margin-top: 2rem
}

.article h3 {
  margin-top: 1.4rem
}

.article pre,
.article code {
  font-family: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;
}

.article pre {
  background: var(--e2-surface);
  color: var(--e2-text);
  border: 1px solid var(--e2-border);
  border-radius: 12px;
  padding: 1rem;
  overflow: auto
}

/* navbar + footer */
.e2-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  backdrop-filter: saturate(180%) blur(8px);
  background: color-mix(in oklab, var(--e2-bg) 88%, transparent);
  border-bottom: 1px solid var(--e2-border);
}

.e2-nav .inner {
  height: 60px;
  display: flex;
  align-items: center;
  justify-content: space-between
}

.e2-brand {
  display: flex;
  align-items: center;
  gap: .6rem;
  font-weight: 800;
  color: var(--e2-text)
}

.e2-nav a:hover {
  text-decoration: none
}

.e2-footer {
  margin-top: 3rem;
  padding: 2.5rem 0;
  border-top: 1px solid var(--e2-border);
  color: var(--e2-muted);
  background: var(--e2-surface);
}

/* grids */
.grid {
  --gap: 18px;
  display: grid;
  gap: var(--gap);
}

.grid.cols-3 {
  grid-template-columns: repeat(3, minmax(0, 1fr))
}

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

@media (max-width: 900px) {
  .grid.cols-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr))
  }
}

@media (max-width: 640px) {

  .grid.cols-3,
  .grid.cols-2 {
    grid-template-columns: 1fr
  }
}

/* utilities */
.muted {
  color: var(--e2-muted)
}

.section {
  margin-top: 2rem
}

.hero {
  padding: 2.2rem 0 1.2rem;
}

.hero .title {
  margin: 0
}

.hero .subtitle {
  margin: .4rem 0 0
}

/* table */
.table-e2 {
  width: 100%;
  border-collapse: collapse;
  font-size: .98rem;
  border: 1px solid var(--e2-border);
  border-radius: 12px;
  overflow: hidden
}

.table-e2 th,
.table-e2 td {
  padding: .75rem .9rem;
  border-bottom: 1px solid var(--e2-border)
}

.table-e2 thead th {
  background: var(--e2-surface);
  text-align: left
}

/* forms */
input[type="text"],
input[type="search"],
textarea,
select {
  border-radius: 12px !important;
  border: 1px solid var(--e2-border) !important;
  background: var(--e2-card) !important;
  color: var(--e2-text) !important;
}

.article-cover img {
  aspect-ratio: 16 / 9;
  width: 100%;
  height: auto;
  /* modern tarayıcılar aspect-ratio ile kırpar */
  object-fit: cover;
  /* 16:9’a taşar/kırpar, kompozisyonu korur */
  display: block;
}

.e2-section-nav {
  gap: .25rem;
  white-space: nowrap;
  overflow: visible;
  flex-wrap: nowrap
}

.e2-nav-item .nav-link {
  border-radius: .5rem
}

.e2-nav-item .nav-link:hover {
  background: rgba(0, 0, 0, .05)
}

.e2-nav .dropdown-menu a {
  white-space: normal
}

@media (max-width:420px) {
  .e2-section-nav {
    overflow-x: auto
  }
}

/* Full-width header container (edge-to-edge) */
.e2-container-full {
  max-width: none;
  width: 100%;
  margin: 0;
  padding-inline: 1rem;
  /* kenarlara biraz nefes */
}

/* Header nav içi daha rahat yerleşim */
.e2-topbar {
  display: flex;
  align-items: center;
  gap: .75rem;
  min-height: 60px;
}

.e2-topbar-left,
.e2-topbar-center,
.e2-topbar-right {
  display: flex;
  align-items: center;
  gap: .5rem;
}

.e2-topbar-left {
  flex: 0 0 auto;
}

.e2-topbar-center {
  flex: 1 1 auto;
  justify-content: center;
  flex-wrap: wrap;
}

.e2-topbar-right {
  flex: 0 0 auto;
  gap: .75rem;
}

.e2-topbar-center a {
  padding: .4rem .75rem;
  border-radius: .5rem;
}

.e2-topbar-center a:hover {
  background: rgba(0, 0, 0, .05);
  text-decoration: none;
}

/* Küçük ekranlarda menü satır içi kaymasın diye */
@media (max-width: 640px) {
  .e2-topbar-center {
    justify-content: flex-start;
    overflow-x: auto;
    white-space: nowrap;
  }
}