/* ============================================================
   AYKHAN.NET - SHARED SITE SHELL
   Same visual language as the landing page (home/css/landing.css),
   for the inner content pages (notion, sections, etc.).
   Theme-aware (dark / light). Framework-free.
   ============================================================ */

/* ---------- Brand + theme tokens ---------- */
:root {
  --first-color:  #235aa6;
  --second-color: #1c1d25;
  --third-color:  #f3f3f3;
  --fourth-color: #f06449;

  --maxw: 1180px;
  --gutter: clamp(1.25rem, 5vw, 5rem);
  --font-sans: "IBM Plex Sans", system-ui, -apple-system, "Segoe UI", sans-serif;
  --font-mono: "IBM Plex Mono", ui-monospace, "SFMono-Regular", monospace;
}
:root,
:root[data-theme="dark"] {
  --bg:          #0f1015;
  --surface:     #15161d;
  --surface-2:   rgba(243, 243, 243, 0.035);
  --text:        #e7e8ee;
  --text-soft:   #9a9cab;
  --heading:     #ffffff;
  --line:        rgba(243, 243, 243, 0.10);
  --card-line:   rgba(243, 243, 243, 0.09);
  --grid-line:   rgba(243, 243, 243, 0.10);
  --glow:        rgba(35, 90, 166, 0.42);
  --nav-bg:      rgba(15, 16, 21, 0.72);
  --accent-name: #6ea0e6;
  --shadow:      0 12px 40px -18px rgba(0, 0, 0, 0.8);
}
:root[data-theme="light"] {
  --bg:          #f4f5f7;
  --surface:     #ffffff;
  --surface-2:   #ffffff;
  --text:        #34384a;
  --text-soft:   #5d6276;
  --heading:     #1c1d25;
  --line:        rgba(28, 29, 37, 0.10);
  --card-line:   rgba(28, 29, 37, 0.10);
  --grid-line:   rgba(28, 29, 37, 0.055);
  --glow:        rgba(35, 90, 166, 0.16);
  --nav-bg:      rgba(244, 245, 247, 0.78);
  --accent-name: #235aa6;
  --shadow:      0 14px 40px -22px rgba(28, 29, 37, 0.28);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; scroll-padding-top: 5rem; }
body {
  margin: 0;
  background: var(--bg);
  color: var(--text);
  font-family: var(--font-sans);
  -webkit-font-smoothing: antialiased;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
  padding-top: 4.5rem; /* clear the fixed nav */
  transition: background 0.3s ease, color 0.3s ease;
}

.wrap {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

/* ============================================================
   NAV  (injected by home/js/shell.js)
   ============================================================ */
.site-nav {
  position: fixed;
  inset: 0 0 auto 0;
  z-index: 50;
  background: var(--nav-bg);
  backdrop-filter: blur(12px);
  border-bottom: 1px solid var(--line);
  transition: background 0.3s ease, border-color 0.3s ease;
}
.site-nav__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  height: 4.5rem;
}
.brand {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  text-decoration: none;
  color: var(--heading);
  font-weight: 700;
  letter-spacing: -0.01em;
  font-size: 1.05rem;
}
.brand__logo {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.5rem;
  height: 2.5rem;
  border-radius: 10px;
  border: 1px solid var(--card-line);
  background: var(--surface-2);
  transition: border-color 0.18s ease, background 0.18s ease;
}
.brand img { width: 1.55rem; height: 1.55rem; display: block; }
.brand:hover .brand__logo { border-color: var(--first-color); background: rgba(35, 90, 166, 0.07); }
.brand__tld { color: var(--first-color); }

.nav-right { display: flex; align-items: center; gap: 1.6rem; }
.nav-links { display: flex; gap: 1.6rem; }
.nav-links a {
  color: var(--text-soft);
  text-decoration: none;
  font-size: 0.92rem;
  font-weight: 500;
  transition: color 0.15s ease;
}
.nav-links a:hover { color: var(--heading); }

.theme-toggle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 9px;
  border: 1px solid var(--card-line);
  background: var(--surface-2);
  color: var(--text);
  cursor: pointer;
  transition: border-color 0.18s ease, color 0.18s ease, background 0.18s ease;
}
.theme-toggle:hover { border-color: var(--first-color); color: var(--first-color); }
.theme-toggle svg { width: 1.15rem; height: 1.15rem; }
.theme-toggle .icon-sun { display: none; }
.theme-toggle .icon-moon { display: block; }
:root[data-theme="light"] .theme-toggle .icon-sun { display: block; }
:root[data-theme="light"] .theme-toggle .icon-moon { display: none; }

@media (max-width: 620px) {
  .nav-links { display: none; }
}

/* ============================================================
   PAGE CONTENT  (existing .case-studies markup, restyled)
   ============================================================ */
.case-studies {
  flex: 1 0 auto;
  padding-top: clamp(2rem, 5vw, 4rem);
  padding-bottom: clamp(3rem, 6vw, 6rem);
}
.section-mask { display: none; }

.case-studies .content {
  width: 100%;
  max-width: var(--maxw);
  margin-inline: auto;
  padding-inline: var(--gutter);
}

.section-text-mask { display: block; }

/* list-page kicker */
.section-subtitle {
  margin: 0 0 0.6rem;
  display: inline-flex;
  align-items: center;
  gap: 0.55rem;
  font-family: var(--font-mono);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--first-color);
}
.section-subtitle::before {
  content: "";
  width: 1.6rem;
  height: 1px;
  background: var(--first-color);
  display: inline-block;
}
.section-title {
  margin: 0 0 2.2rem;
  font-size: clamp(1.8rem, 3.4vw, 2.6rem);
  font-weight: 700;
  letter-spacing: -0.02em;
  color: var(--heading);
}

/* ---------- Page note / callout ---------- */
.page-note {
  margin: 0 0 1.8rem;
  padding: 0.85rem 1.1rem;
  border-radius: 12px;
  border: 1px solid var(--card-line);
  border-left: 3px solid var(--first-color);
  background: var(--surface-2);
  font-family: var(--font-mono);
  font-size: 0.8rem;
  line-height: 1.6;
  letter-spacing: 0.01em;
  color: var(--text-soft);
}

/* ---------- Link grid (PageLinkDataManager output) ---------- */
.case-studies-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(min(100%, 16rem), 1fr));
  gap: 1rem;
}
.case-studies-list li { margin: 0; }

.case-study {
  position: relative;
  display: flex;
  flex-direction: column;
  padding: 0;
  overflow: hidden;
  border-radius: 14px;
  background-color: var(--surface-2);
  border: 1px solid var(--card-line);
  box-shadow: var(--shadow);
  text-decoration: none;
  color: inherit;
  transition: transform 0.2s ease, border-color 0.2s ease, background-color 0.2s ease;
}
.case-study-media {
  width: 100%;
  aspect-ratio: 16 / 9;
  background-color: var(--surface-2);
  background-repeat: no-repeat;
  background-position: center;
  background-size: cover;
}
.case-study:hover {
  transform: translateY(-4px);
  border-color: var(--first-color);
  background-color: rgba(35, 90, 166, 0.07);
}
.case-study-mask-number {
  position: absolute;
  top: 0.9rem;
  right: 0.9rem;
  z-index: 1;
  padding: 0.15rem 0.55rem;
  border-radius: 999px;
  background: rgba(0, 0, 0, 0.55);
  backdrop-filter: blur(2px);
}
.case-study-mask-back {
  font-family: var(--font-mono);
  font-size: 0.8rem;
  letter-spacing: 0.06em;
  color: #fff;
}
.case-study-text-section {
  display: block;
  padding: 1rem 1.3rem 1.2rem;
  background: var(--surface-2);
  border-top: 1px solid var(--card-line);
}
.case-study-title {
  margin: 0;
  font-size: 1.18rem;
  font-weight: 600;
  color: var(--heading);
  display: -webkit-box;
  -webkit-line-clamp: 1;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.case-study-subtitle {
  margin: 0.4rem 0 0;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  line-height: 1.5;
  letter-spacing: 0.02em;
  color: var(--text-soft);
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
  min-height: 2.34em;
}
.case-study .the-button.call-to-button {
  display: inline-flex;
  align-items: center;
  gap: 0.45rem;
  margin-top: 0.9rem;
  padding: 0;
  background: none;
  border: 0;
  cursor: pointer;
  font-family: var(--font-mono);
  font-size: 0.76rem;
  letter-spacing: 0.04em;
  color: var(--first-color);
}
.case-study .button-icon svg {
  width: 0.95rem;
  height: 0.95rem;
  fill: currentColor;
  transition: transform 0.18s ease;
}
.case-study:hover .button-icon svg { transform: translateX(3px); }

.cards-error {
  grid-column: 1 / -1;
  list-style: none;
  padding: 1.4rem 1.6rem;
  border-radius: 14px;
  border: 1px solid var(--card-line);
  background: var(--surface-2);
  color: var(--text-soft);
  font-family: var(--font-mono);
  font-size: 0.85rem;
  text-align: center;
}

.case-study--skeleton {
  min-height: 18rem;
  border: 1px solid var(--card-line);
  border-radius: 14px;
  background-image: linear-gradient(100deg, var(--surface-2) 30%, var(--line) 50%, var(--surface-2) 70%);
  background-size: 200% 100%;
  animation: cards-shimmer 1.2s ease-in-out infinite;
}
@keyframes cards-shimmer {
  from { background-position: 200% 0; }
  to   { background-position: -200% 0; }
}
@media (prefers-reduced-motion: reduce) {
  .case-study--skeleton { animation: none; }
}

/* ---------- Embedded notion content ----------
   The note is fetched and rendered inline inside a Shadow DOM by
   home/js/shell.js (the #iframeContent element carries the note URL). It reads
   as ordinary page content: one scrollbar, full height, theme-aware colours. */
.iframe-container {
  margin-top: 0;
  background: transparent;
}
.notion-note {
  display: block;
}
/* Lesson pages lead with the note's cover image, so drop the section's
   decorative top gap (body already pads 4.5rem to clear the fixed nav). */
.case-studies:has(.iframe-container) {
  padding-top: 0;
}

/* ============================================================
   FOOTER  (injected by home/js/shell.js)
   ============================================================ */
.site-footer {
  flex-shrink: 0;
  border-top: 1px solid var(--line);
  padding: 2.2rem 0;
}
.site-footer__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  flex-wrap: wrap;
}
.site-footer .brand { font-size: 0.98rem; }
.contact__links { display: flex; flex-wrap: wrap; gap: 0.7rem; }
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.6rem;
  padding: 0.6rem 1.1rem;
  border-radius: 10px;
  border: 1px solid var(--card-line);
  background: transparent;
  color: var(--text);
  font: 600 0.9rem var(--font-sans);
  text-decoration: none;
  transition: transform 0.18s ease, border-color 0.18s ease, background 0.18s ease;
}
.btn:hover {
  border-color: var(--first-color);
  background: var(--surface-2);
  transform: translateY(-2px);
}
.site-footer__note {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-soft);
}

/* standalone call-to-action button (e.g. "Back to home" on placeholder pages) */
.the-button.call-to-button {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  padding: 0.7rem 1.3rem;
  border-radius: 10px;
  background: var(--first-color);
  color: #fff;
  font: 600 0.95rem var(--font-sans);
  text-decoration: none;
  transition: transform 0.18s ease, background 0.18s ease;
}
.the-button.call-to-button:hover { background: #2b6bc2; transform: translateY(-2px); }
.case-study .the-button.call-to-button:hover {
  background: none;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  .btn, .case-study, .theme-toggle, .case-study .button-icon svg { transition: none; }
}