/* Ders sitesi stilleri. Dogrudan bu dosya duzenlenir. */
:root {
  --navy: #102a43;
  --navy-deep: #091d31;
  --navy-soft: #dfe8ef;
  --burgundy: #7a1631;
  --burgundy-dark: #5f0f27;
  --burgundy-soft: #f6e9ed;
  --cream: #f7f4ef;
  --paper: #fffdf9;
  --white: #ffffff;
  --ink: #162230;
  --muted: #65717e;
  --line: #e3ded6;
  --shadow: 0 18px 50px rgba(16, 42, 67, 0.1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
  margin: 0;
  background: var(--cream);
  color: var(--ink);
  font-family: "Aptos", "Segoe UI", Arial, sans-serif;
  -webkit-font-smoothing: antialiased;
}
a { color: inherit; text-decoration: none; }
button, input { font: inherit; }
img { display: block; max-width: 100%; }
::selection { background: var(--burgundy); color: var(--white); }

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

:focus-visible { outline: 3px solid #d9a21b; outline-offset: 3px; }
.site-shell { min-height: 100vh; display: flex; flex-direction: column; }
.site-shell main { flex: 1; }
.page-container { width: min(1180px, calc(100% - 40px)); margin-inline: auto; }

.site-header {
  position: relative;
  z-index: 20;
  background: var(--navy-deep);
  color: var(--white);
  border-bottom: 1px solid rgba(255,255,255,.12);
}
.site-header::before {
  content: "";
  position: absolute;
  inset: auto 0 0;
  height: 3px;
  background: var(--burgundy);
}
.header-inner { min-height: 92px; display: flex; align-items: center; justify-content: space-between; gap: 24px; }
.brand { display: inline-flex; align-items: center; gap: 15px; border-radius: 10px; }
.brand img { width: 62px; height: 62px; object-fit: contain; flex: 0 0 auto; }
.brand-copy { display: grid; gap: 3px; }
.brand-copy strong { font-family: Georgia, "Times New Roman", serif; font-size: 1.19rem; letter-spacing: .01em; }
.brand-copy span { font-size: .76rem; color: #cad6df; letter-spacing: .04em; }
.institution-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 14px;
  border: 1px solid rgba(255,255,255,.28);
  border-radius: 999px;
  font-size: .78rem;
  font-weight: 800;
  letter-spacing: .08em;
  transition: background .2s ease, border-color .2s ease;
}
.institution-link:hover { background: rgba(255,255,255,.1); border-color: rgba(255,255,255,.55); }

.hero {
  position: relative;
  overflow: hidden;
  background: var(--navy-deep);
  color: var(--white);
  padding: 68px 0 90px;
}
.hero::after {
  content: "";
  position: absolute;
  left: 0;
  right: 0;
  bottom: 0;
  height: 6px;
  background: linear-gradient(90deg, var(--burgundy) 0 38%, rgba(122,22,49,.25) 38% 100%);
}
.hero-glow { position: absolute; border-radius: 50%; pointer-events: none; }
.hero-glow-one { width: 460px; height: 460px; top: -310px; right: 4%; border: 1px solid rgba(255,255,255,.08); box-shadow: 0 0 0 55px rgba(255,255,255,.025), 0 0 0 110px rgba(255,255,255,.018); }
.hero-glow-two { width: 260px; height: 260px; bottom: -200px; left: 18%; background: rgba(122,22,49,.25); filter: blur(20px); }
.hero-layout { position: relative; display: grid; grid-template-columns: minmax(0, 1.35fr) minmax(320px, .65fr); gap: 80px; align-items: center; }
.eyebrow { margin: 0 0 10px; color: var(--burgundy); font-size: .73rem; font-weight: 800; letter-spacing: .18em; text-transform: uppercase; }
.eyebrow.light { color: #e7aebe; }
.hero h1, .course-hero h1, .week-hero h1 {
  font-family: Georgia, "Times New Roman", serif;
  font-weight: 650;
  letter-spacing: -.035em;
}
.hero h1 { max-width: 760px; margin: 0; font-size: clamp(3rem, 6vw, 5.2rem); line-height: .98; }
.hero-lead { max-width: 640px; margin: 24px 0 30px; color: #c9d5df; font-size: 1.05rem; line-height: 1.75; }
.instructor-chip { display: inline-flex; align-items: center; gap: 13px; }
.instructor-monogram { display: grid; place-items: center; width: 42px; height: 42px; border-radius: 50%; background: var(--burgundy); font-family: Georgia, "Times New Roman", serif; font-size: 1.2rem; }
.instructor-chip > span:last-child { display: grid; gap: 2px; }
.instructor-chip small { color: #aebfcd; font-size: .7rem; text-transform: uppercase; letter-spacing: .08em; }
.instructor-chip strong { font-size: .93rem; }
.hero-panel { position: relative; padding: 26px; border: 1px solid rgba(255,255,255,.18); border-radius: 22px; background: rgba(255,255,255,.075); backdrop-filter: blur(18px); box-shadow: 0 28px 80px rgba(0,0,0,.22); }
.hero-panel::before { content: ""; position: absolute; inset: 10px auto 10px 0; width: 3px; border-radius: 3px; background: var(--burgundy); }
.hero-panel-top { display: flex; align-items: center; gap: 9px; font-size: .72rem; color: #d6e0e7; text-transform: uppercase; letter-spacing: .09em; }
.hero-panel-top strong { margin-left: auto; color: var(--white); }
.live-dot { width: 8px; height: 8px; border-radius: 50%; background: #e7aebe; box-shadow: 0 0 0 5px rgba(231,174,190,.11); }
.hero-stat-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin: 30px 0 24px; }
.hero-stat-grid div { display: grid; gap: 4px; }
.hero-stat-grid strong { font-family: Georgia, "Times New Roman", serif; font-size: 2.35rem; line-height: 1; }
.hero-stat-grid span { color: #b4c3cf; font-size: .72rem; }
.hero-panel-line { height: 1px; background: rgba(255,255,255,.15); }
.hero-panel p { margin: 18px 0 0; color: #c4d0da; font-size: .8rem; line-height: 1.6; }

.courses-section { padding: 82px 0 100px; scroll-margin-top: 30px; }
.section-heading { display: flex; align-items: end; justify-content: space-between; gap: 32px; margin-bottom: 34px; }
.section-heading h2 { margin: 0; font-family: Georgia, "Times New Roman", serif; font-size: clamp(2rem, 4vw, 3.1rem); line-height: 1.05; color: var(--navy); }
.section-heading > p { max-width: 430px; margin: 0; color: var(--muted); line-height: 1.65; font-size: .92rem; }
.course-toolbar { display: flex; align-items: center; justify-content: space-between; gap: 20px; padding: 14px; border: 1px solid var(--line); border-radius: 18px; background: var(--paper); box-shadow: 0 8px 30px rgba(16,42,67,.05); }
.search-box { flex: 1; min-width: 220px; display: flex; align-items: center; gap: 10px; padding: 0 14px; }
.search-icon { color: var(--burgundy); font-size: 1.65rem; line-height: 1; transform: rotate(-20deg); }
.search-box input { width: 100%; border: 0; outline: 0; background: transparent; color: var(--ink); font-size: .92rem; }
.search-box input::placeholder { color: #8b949d; }
.filter-group { display: flex; gap: 5px; padding: 4px; border-radius: 12px; background: #ece8e2; }
.filter-group button { border: 0; border-radius: 9px; padding: 9px 13px; background: transparent; color: #5d6771; cursor: pointer; font-size: .76rem; font-weight: 750; transition: .2s ease; }
.filter-group button:hover { color: var(--navy); background: rgba(255,255,255,.55); }
.filter-group button.active { color: var(--white); background: var(--navy); box-shadow: 0 6px 16px rgba(16,42,67,.17); }
.result-count { margin: 18px 0 14px; color: var(--muted); font-size: .76rem; }
.course-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 22px; }
.course-card { position: relative; min-height: 350px; display: flex; flex-direction: column; overflow: hidden; padding: 26px; border: 1px solid var(--line); border-radius: 20px; background: var(--paper); box-shadow: 0 8px 24px rgba(16,42,67,.045); transition: transform .25s ease, box-shadow .25s ease, border-color .25s ease; }
.course-card::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 4px; background: var(--burgundy); transform: scaleY(.34); transform-origin: top; transition: transform .25s ease; }
.course-card:hover { transform: translateY(-5px); border-color: #c9bbc0; box-shadow: var(--shadow); }
.course-card:hover::before { transform: scaleY(1); }
.course-card-top { display: flex; align-items: center; justify-content: space-between; }
.course-number { font-family: Georgia, "Times New Roman", serif; color: #d7d1ca; font-size: 2rem; line-height: 1; }
.requirement { padding: 6px 9px; border-radius: 999px; background: var(--navy-soft); color: var(--navy); font-size: .66rem; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; }
.requirement.elective { background: var(--burgundy-soft); color: var(--burgundy); }
.course-code { margin: 24px 0 7px; color: var(--burgundy); font-size: .72rem; font-weight: 850; letter-spacing: .15em; }
.course-card h3 { max-width: 90%; margin: 0; color: var(--navy); font-family: Georgia, "Times New Roman", serif; font-size: 1.65rem; line-height: 1.15; }
.course-summary { margin: 15px 0 20px; color: var(--muted); font-size: .84rem; line-height: 1.65; }
.course-meta { display: flex; flex-wrap: wrap; gap: 7px; margin-top: auto; }
.course-meta span { padding: 6px 8px; border: 1px solid var(--line); border-radius: 6px; color: #5a6570; font-size: .66rem; font-weight: 700; }
.course-card-action { display: flex; align-items: center; justify-content: space-between; margin: 20px -26px -26px; padding: 16px 26px; border-top: 1px solid var(--line); color: var(--navy); font-size: .76rem; font-weight: 800; }
.course-card-action strong { color: var(--burgundy); font-size: 1.25rem; transition: transform .2s ease; }
.course-card:hover .course-card-action strong { transform: translateX(4px); }
.empty-search, .empty-materials { text-align: center; border: 1px dashed #cfc6bd; border-radius: 22px; background: rgba(255,253,249,.65); }
.empty-search { padding: 54px 20px; }
.empty-search > span { color: var(--burgundy); font-size: 2.2rem; }
.empty-search h3 { margin: 10px 0 6px; color: var(--navy); }
.empty-search p { margin: 0; color: var(--muted); font-size: .85rem; }

.inner-page { background: var(--cream); }
.inner-page main { padding-bottom: 90px; }
.breadcrumbs { padding: 26px 0 22px; }
.breadcrumbs ol { display: flex; flex-wrap: wrap; align-items: center; gap: 0; margin: 0; padding: 0; list-style: none; }
.breadcrumbs li { display: flex; align-items: center; color: var(--muted); font-size: .72rem; font-weight: 650; }
.breadcrumbs li:not(:last-child)::after { content: "/"; margin: 0 10px; color: #b9b0a7; }
.breadcrumbs a:hover { color: var(--burgundy); }
.breadcrumbs span[aria-current="page"] { color: var(--navy); }
.course-hero, .week-hero { position: relative; overflow: hidden; border-radius: 24px; background: var(--navy-deep); color: var(--white); box-shadow: var(--shadow); }
.course-hero::before, .week-hero::before { content: ""; position: absolute; width: 240px; height: 240px; right: -95px; top: -120px; border: 1px solid rgba(255,255,255,.1); border-radius: 50%; box-shadow: 0 0 0 44px rgba(255,255,255,.025), 0 0 0 88px rgba(255,255,255,.018); }
.course-hero { display: grid; grid-template-columns: minmax(0,1fr) auto; gap: 50px; align-items: end; padding: 48px; }
.course-hero-copy { position: relative; max-width: 760px; }
.course-hero h1 { max-width: 720px; margin: 0; font-size: clamp(2.5rem, 5vw, 4.3rem); line-height: 1.02; }
.course-hero-copy > p:last-child { max-width: 670px; margin: 20px 0 0; color: #c7d3dc; font-size: .95rem; line-height: 1.72; }
.course-facts { position: relative; display: grid; min-width: 160px; }
.course-facts div { display: grid; gap: 4px; padding: 13px 0; border-bottom: 1px solid rgba(255,255,255,.14); }
.course-facts div:last-child { border-bottom: 0; }
.course-facts span { color: #aebfcc; font-size: .64rem; text-transform: uppercase; letter-spacing: .1em; }
.course-facts strong { font-size: .92rem; }
.weeks-section { padding-top: 62px; }
.weeks-heading { align-items: center; }
.week-grid { display: grid; grid-template-columns: repeat(2, minmax(0,1fr)); gap: 12px; }
.week-card { display: grid; grid-template-columns: 54px 1fr auto; gap: 18px; align-items: center; min-height: 112px; padding: 18px; border: 1px solid var(--line); border-radius: 16px; background: var(--paper); transition: transform .2s ease, border-color .2s ease, box-shadow .2s ease; }
.week-card:hover { transform: translateY(-2px); border-color: #b9a3aa; box-shadow: 0 10px 28px rgba(16,42,67,.08); }
.week-number { display: grid; place-items: center; width: 54px; height: 54px; border-radius: 14px; background: var(--navy); color: var(--white); font-family: Georgia, "Times New Roman", serif; font-size: 1.2rem; }
.week-card-copy { min-width: 0; display: grid; gap: 4px; }
.week-card-copy small { color: var(--burgundy); font-size: .66rem; font-weight: 850; text-transform: uppercase; letter-spacing: .09em; }
.week-card-copy strong { overflow: hidden; color: var(--navy); font-family: Georgia, "Times New Roman", serif; font-size: 1.04rem; text-overflow: ellipsis; white-space: nowrap; }
.week-card-copy > span { color: var(--muted); font-size: .69rem; }
.week-arrow { color: var(--burgundy); font-size: 1.25rem; transition: transform .2s ease; }
.week-card:hover .week-arrow { transform: translateX(4px); }
.week-card.locked { opacity: .55; cursor: not-allowed; background: var(--cream); }
.week-card.locked:hover { transform: none; border-color: var(--line); box-shadow: none; }
.week-card.locked .week-number { background: var(--muted); }
.week-lock { color: var(--muted); font-size: 1.1rem; }

.week-hero { display: grid; grid-template-columns: auto 1fr; gap: 34px; align-items: center; padding: 44px 48px; }
.week-index { position: relative; display: grid; place-items: center; width: 104px; height: 104px; border: 1px solid rgba(255,255,255,.22); border-radius: 22px; background: rgba(255,255,255,.07); color: #edc1cd; font-family: Georgia, "Times New Roman", serif; font-size: 2.6rem; }
.week-hero > div:last-child { position: relative; }
.week-hero h1 { margin: 0; font-size: clamp(2.5rem, 5vw, 4rem); line-height: 1; }
.week-hero h2 { margin: 12px 0 0; color: #dce5eb; font-size: 1.05rem; font-weight: 600; }
.week-hero > div:last-child > p:last-child { margin: 12px 0 0; color: #aebfcc; font-size: .83rem; }
.materials-section { padding: 60px 0 0; }
.material-heading { align-items: center; }
.material-count { padding: 8px 12px; border: 1px solid var(--line); border-radius: 999px; color: var(--muted); font-size: .72rem; font-weight: 750; }
.empty-materials { padding: 66px 24px; }
.empty-file { position: relative; display: grid; place-items: center; width: 68px; height: 78px; margin: 0 auto 22px; border: 2px solid #b8c4ce; border-radius: 10px; color: var(--burgundy); }
.empty-file::before { content: ""; position: absolute; top: -2px; right: -2px; width: 22px; height: 22px; border-left: 2px solid #b8c4ce; border-bottom: 2px solid #b8c4ce; background: var(--cream); border-radius: 0 8px 0 6px; }
.empty-file span { font-size: 1.5rem; font-weight: 400; }
.empty-materials h3 { margin: 0; color: var(--navy); font-family: Georgia, "Times New Roman", serif; font-size: 1.6rem; }
.empty-materials > p:last-child { max-width: 520px; margin: 12px auto 0; color: var(--muted); font-size: .85rem; line-height: 1.65; }
.material-list { display: grid; gap: 10px; }
.material-card { display: grid; grid-template-columns: auto 1fr auto; gap: 16px; align-items: center; padding: 18px; border: 1px solid var(--line); border-radius: 14px; background: var(--paper); }
.material-kind { display: grid; place-items: center; min-width: 54px; height: 42px; padding: 0 9px; border-radius: 9px; background: var(--navy-soft); color: var(--navy); font-size: .65rem; font-weight: 900; }
.material-kind.pdf, .material-kind.presentation { background: var(--burgundy-soft); color: var(--burgundy); }
.material-kind.interactive { min-width: 72px; background: var(--navy); color: var(--white); }
.material-copy { display: grid; gap: 3px; }
.material-copy strong { color: var(--navy); font-size: .9rem; }
.material-copy span { color: var(--muted); font-size: .72rem; }
.week-navigation { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 26px; }
.week-nav-link { display: flex; align-items: center; gap: 14px; padding: 17px 19px; border: 1px solid var(--line); border-radius: 14px; background: var(--paper); color: var(--navy); transition: border-color .2s ease, transform .2s ease; }
.week-nav-link:hover { border-color: #b9a3aa; transform: translateY(-2px); }
.week-nav-link.next { justify-content: flex-end; text-align: right; }
.week-nav-link > span:first-child:not(:last-child), .week-nav-link > span:last-child:not(:first-child) { color: var(--burgundy); font-size: 1.2rem; }
.week-nav-link > span { display: grid; gap: 2px; }
.week-nav-link small { color: var(--muted); font-size: .63rem; text-transform: uppercase; letter-spacing: .08em; }
.week-nav-link strong { font-size: .86rem; }

.site-footer { margin-top: auto; padding: 42px 0 20px; background: var(--navy-deep); color: var(--white); border-top: 5px solid var(--burgundy); }
.footer-grid { display: flex; align-items: start; justify-content: space-between; gap: 30px; padding-bottom: 34px; }
.footer-kicker { margin: 0 0 7px; color: #aebfcc; font-size: .68rem; text-transform: uppercase; letter-spacing: .1em; }
.footer-grid strong { font-family: Georgia, "Times New Roman", serif; font-size: 1.15rem; }
.footer-links { display: flex; gap: 22px; color: #d1dbe2; font-size: .76rem; }
.footer-links a:hover { color: var(--white); }
.footer-bottom { display: flex; justify-content: space-between; gap: 20px; padding-top: 18px; border-top: 1px solid rgba(255,255,255,.12); color: #8fa2b1; font-size: .66rem; }

@media (max-width: 880px) {
  .hero-layout { grid-template-columns: 1fr; gap: 48px; }
  .hero-panel { max-width: 560px; }
  .course-toolbar { align-items: stretch; flex-direction: column; }
  .filter-group { align-self: flex-start; }
  .course-hero { grid-template-columns: 1fr; gap: 28px; }
  .course-facts { grid-template-columns: repeat(3, 1fr); }
  .course-facts div { border-right: 1px solid rgba(255,255,255,.14); border-bottom: 0; padding: 0 16px; }
  .course-facts div:first-child { padding-left: 0; }
  .course-facts div:last-child { border-right: 0; }
}

@media (max-width: 680px) {
  .page-container { width: min(100% - 28px, 1180px); }
  .header-inner { min-height: 78px; }
  .brand { gap: 10px; }
  .brand img { width: 48px; height: 48px; }
  .brand-copy strong { font-size: 1rem; }
  .brand-copy span { max-width: 210px; font-size: .62rem; line-height: 1.35; }
  .institution-link { padding: 8px 10px; font-size: .68rem; }
  .hero { padding: 52px 0 72px; }
  .hero h1 { font-size: clamp(2.45rem, 11.5vw, 3.25rem); line-height: 1.02; }
  .hero-lead { font-size: .93rem; }
  .hero-panel { padding: 22px; }
  .section-heading { align-items: start; flex-direction: column; gap: 13px; margin-bottom: 26px; }
  .courses-section { padding: 60px 0 72px; }
  .filter-group { width: 100%; overflow-x: auto; }
  .filter-group button { flex: 1 0 auto; }
  .course-grid, .week-grid { grid-template-columns: 1fr; }
  .course-card { min-height: 330px; padding: 22px; }
  .course-card-action { margin: 20px -22px -22px; padding-inline: 22px; }
  .course-hero { padding: 34px 24px; border-radius: 19px; }
  .course-hero h1 { font-size: 2.55rem; }
  .course-facts { min-width: 0; }
  .course-facts div { padding-inline: 10px; }
  .course-facts strong { font-size: .8rem; }
  .weeks-section, .materials-section { padding-top: 48px; }
  .week-card { grid-template-columns: 48px 1fr auto; min-height: 102px; gap: 13px; padding: 15px; }
  .week-number { width: 48px; height: 48px; }
  .week-hero { grid-template-columns: 1fr; gap: 22px; padding: 30px 24px; border-radius: 19px; }
  .week-index { width: 74px; height: 74px; font-size: 2rem; }
  .week-navigation { grid-template-columns: 1fr; }
  .week-navigation > span { display: none; }
  .footer-grid, .footer-bottom { flex-direction: column; }
  .footer-links { flex-direction: column; gap: 10px; }
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after { animation-duration: .01ms !important; animation-iteration-count: 1 !important; transition-duration: .01ms !important; }
}