/* ============================================================
   TECH SESSIONS · Shared site styles
   Loaded after eh-foundation.css and tokens.css.
   Used by home, event detail, registration, and admin.
   ============================================================ */

* { box-sizing: border-box; }
html, body { margin: 0; padding: 0; }
html { scroll-behavior: smooth; background: var(--ts-paper); }
body {
  background: var(--ts-paper);
  color: var(--ts-text);
  font-family: var(--ts-sans);
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}
a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
button { font-family: inherit; cursor: pointer; }

.wrap { max-width: var(--ts-max); margin: 0 auto; padding-left: var(--ts-page-pad); padding-right: var(--ts-page-pad); }
.eyebrow { font-family: var(--ts-sans); font-size: 11.5px; font-weight: 700; letter-spacing: 0.16em; text-transform: uppercase; color: var(--ts-text-muted); }

/* =========================================================
   NAV
   ========================================================= */
.ts-nav {
  position: sticky; top: 0; z-index: 80;
  background: rgba(255,255,255,0.92);
  backdrop-filter: saturate(180%) blur(10px);
  -webkit-backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid transparent;
  transition: border-color 200ms ease;
}
.ts-nav.scrolled { border-bottom-color: var(--ts-line); }
.ts-nav .bar { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 16px 0; }
.ts-nav .links { display: flex; align-items: center; gap: 4px; }
.ts-nav .links a { padding: 8px 14px; border-radius: 999px; font-size: 14px; font-weight: 500; color: var(--ts-text); transition: background 160ms; }
.ts-nav .links a:hover, .ts-nav .links a.active { background: var(--ts-paper-2); }
.ts-nav .actions { display: flex; align-items: center; gap: 8px; }

/* Brand lockup */
.ts-brand { display: inline-flex; align-items: baseline; gap: 10px; line-height: 1; }
.ts-brand .wordmark { font-family: var(--ts-display); font-weight: 800; font-size: 22px; letter-spacing: -0.02em; color: var(--ts-ink); }
.ts-brand .wordmark .dot { color: var(--ts-primary); }
.ts-brand .byline { font-family: var(--ts-sans); font-size: 11px; font-weight: 500; color: var(--ts-text-subtle); letter-spacing: 0.02em; }
.ts-brand .byline em { font-family: var(--ts-script); font-style: normal; font-weight: 700; color: var(--ts-text-muted); font-size: 13px; padding: 0 1px; }

/* Per-event lockup (used on event/registration pages when a client + event logo are configured) */
.ts-event-brand { display: inline-flex; align-items: center; gap: 14px; }
.ts-event-brand img { max-height: 36px; width: auto; }
.ts-event-brand .divider { width: 1px; height: 28px; background: var(--ts-line-2); }
.ts-event-brand .ts-mini { font-family: var(--ts-display); font-weight: 700; color: var(--ts-text-muted); font-size: 13px; letter-spacing: -0.01em; }

/* =========================================================
   BUTTONS
   ========================================================= */
.btn { display: inline-flex; align-items: center; gap: 8px; padding: 11px 18px; border-radius: 10px; border: 1px solid transparent; font-weight: 600; font-size: 14.5px; line-height: 1; transition: transform 160ms ease, background 160ms, box-shadow 160ms, border-color 160ms; white-space: nowrap; }
.btn svg, .btn i[data-lucide] { width: 16px; height: 16px; stroke-width: 1.75; }
.btn-primary { background: var(--ts-primary); color: #fff; }
.btn-primary:hover { background: var(--ts-primary-hover); transform: translateY(-1px); }
.btn-ghost { background: transparent; color: var(--ts-text); border-color: var(--ts-line-2); }
.btn-ghost:hover { background: var(--ts-paper-2); border-color: var(--ts-text-subtle); }
.btn-ink { background: var(--ts-ink); color: #fff; }
.btn-ink:hover { background: #1d2840; transform: translateY(-1px); }
.btn-yellow { background: var(--ts-accent); color: var(--ts-ink); }
.btn-yellow:hover { background: var(--ts-accent-hover); transform: translateY(-1px); }
.btn-lg { padding: 14px 22px; font-size: 15px; border-radius: 12px; }
.btn-sm { padding: 7px 12px; font-size: 13px; border-radius: 8px; }
.btn-link { padding: 0; background: transparent; color: var(--ts-primary); font-weight: 600; }
.btn-link:hover { text-decoration: underline; }
.btn-icon { width: 36px; height: 36px; padding: 0; justify-content: center; border-radius: 999px; border: 1px solid var(--ts-line); background: #fff; color: var(--ts-text); }
.btn-icon:hover { background: var(--ts-paper-2); }

/* =========================================================
   CHIPS / BADGES
   ========================================================= */
.chip { display: inline-flex; align-items: center; gap: 6px; padding: 4px 10px; border-radius: 999px; font-size: 12px; font-weight: 600; line-height: 1.4; }
.chip-live { background: var(--ts-live-soft); color: #0D652D; }
.chip-live::before { content: ''; width: 6px; height: 6px; border-radius: 999px; background: var(--ts-live); }
.chip-upcoming { background: var(--ts-primary-soft); color: var(--ts-primary-strong); }
.chip-featured { background: var(--ts-accent-soft); color: #8b6700; border: 1px solid var(--eh-yellow-100); }
.chip-track { background: var(--ts-paper-2); color: var(--ts-text); border: 1px solid var(--ts-line); }
.chip-mode { background: #fff; color: var(--ts-text); border: 1px solid var(--ts-line); }
.chip-mode .dot { width: 6px; height: 6px; border-radius: 999px; display: inline-block; }
.chip-mode.online .dot { background: var(--ts-live); }
.chip-mode.offline .dot { background: var(--ts-accent); }

/* =========================================================
   SECTION COMMON
   ========================================================= */
.section { padding: 96px 0; }
.section.alt { background: var(--ts-paper-2); }
.section-head { display: flex; justify-content: space-between; align-items: end; gap: 32px; margin-bottom: 40px; flex-wrap: wrap; }
.section-head h2 { font-family: var(--ts-display); font-size: clamp(30px, 3.6vw, 48px); font-weight: 700; letter-spacing: -0.025em; line-height: 1.08; margin: 8px 0 0; color: var(--ts-ink); max-width: 720px; text-wrap: balance; }
.section-head h2 em { font-family: var(--ts-script); font-weight: 700; font-style: italic; color: var(--ts-primary); }
.section-head .meta { color: var(--ts-text-muted); font-size: 15px; max-width: 360px; line-height: 1.55; }
.section-head .meta a { color: var(--ts-primary); font-weight: 600; }

/* =========================================================
   SESSION CARD (used on home + sessions list)
   ========================================================= */
.sessions-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }

.scard { background: #fff; border: 1px solid var(--ts-line); border-radius: 14px; padding: 22px; display: flex; flex-direction: column; gap: 14px; transition: all 200ms ease; position: relative; overflow: hidden; text-decoration: none; color: inherit; }
.scard:hover { transform: translateY(-3px); box-shadow: 0 8px 28px rgba(10,22,40,0.08); border-color: var(--ts-line-2); cursor: pointer; }
.scard .head { display: flex; justify-content: space-between; align-items: start; gap: 12px; }
.scard .head .left { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.scard h4 { font-family: var(--ts-display); font-size: 20px; font-weight: 700; line-height: 1.2; margin: 0; color: var(--ts-ink); text-wrap: balance; }
.scard .speaker { display: flex; align-items: center; gap: 10px; }
.scard .ava { width: 32px; height: 32px; border-radius: 999px; background: var(--ts-paper-2); border: 1px solid var(--ts-line); display: flex; align-items: center; justify-content: center; font-family: var(--ts-display); font-weight: 700; font-size: 13px; color: var(--ts-text); flex-shrink: 0; }
.scard .meta-s { font-size: 13px; line-height: 1.3; }
.scard .meta-s .name { color: var(--ts-ink); font-weight: 600; }
.scard .meta-s .role { color: var(--ts-text-muted); font-size: 12px; }
.scard .when { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--ts-text-muted); }
.scard .foot { display: flex; justify-content: space-between; align-items: center; padding-top: 14px; border-top: 1px solid var(--ts-line); margin-top: auto; }
.scard .foot .seats { font-size: 12px; color: var(--ts-text-subtle); }
.scard .foot .seats b { color: var(--ts-ink); }

/* =========================================================
   FOOTER
   ========================================================= */
.ts-footer { padding: 64px 0 32px; border-top: 1px solid var(--ts-line); margin-top: 64px; }
.ts-footer .grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 48px; }
.ts-footer .brand-col { display: flex; flex-direction: column; gap: 16px; }
.ts-footer .brand-col p { font-size: 14px; color: var(--ts-text-muted); margin: 0; max-width: 320px; line-height: 1.55; }
.ts-footer .by-edler { display: flex; align-items: center; gap: 12px; margin-top: 12px; padding-top: 16px; border-top: 1px dashed var(--ts-line); }
.ts-footer .by-edler img { height: 36px; width: auto; opacity: 0.9; }
.ts-footer .by-edler .text { font-size: 12px; color: var(--ts-text-muted); line-height: 1.4; }
.ts-footer .by-edler .text b { color: var(--ts-ink); display: block; font-size: 13px; font-weight: 700; }
.ts-footer h6 { font-family: var(--ts-sans); font-size: 12px; font-weight: 700; letter-spacing: 0.14em; text-transform: uppercase; color: var(--ts-text); margin: 0 0 16px; }
.ts-footer ul { list-style: none; padding: 0; margin: 0; display: flex; flex-direction: column; gap: 10px; }
.ts-footer ul a { font-size: 14px; color: var(--ts-text-muted); }
.ts-footer ul a:hover { color: var(--ts-primary); }
.ts-footer .legal { display: flex; justify-content: space-between; align-items: center; margin-top: 48px; padding-top: 24px; border-top: 1px solid var(--ts-line); font-size: 12px; color: var(--ts-text-subtle); }
.ts-footer .legal .marks { display: flex; gap: 18px; }
.ts-footer .legal .marks a:hover { color: var(--ts-text); }

/* =========================================================
   PAGE HEAD (used on event detail, register, admin)
   ========================================================= */
.page-head { padding: 56px 0 24px; }
.page-head h1 { font-family: var(--ts-display); font-size: clamp(36px, 4.8vw, 64px); font-weight: 800; letter-spacing: -0.03em; line-height: 1.04; margin: 12px 0 16px; color: var(--ts-ink); text-wrap: balance; }
.page-head h1 em { font-family: var(--ts-script); color: var(--ts-primary); font-style: italic; font-weight: 700; }
.page-head .lead { font-size: 18px; color: var(--ts-text-muted); max-width: 640px; margin: 0; line-height: 1.55; }
.page-head .crumbs { display: flex; gap: 6px; align-items: center; font-size: 13px; color: var(--ts-text-muted); margin-bottom: 8px; }
.page-head .crumbs a { color: var(--ts-text-muted); }
.page-head .crumbs a:hover { color: var(--ts-primary); }
.page-head .crumbs .sep { color: var(--ts-text-subtle); }

/* =========================================================
   FORM PRIMITIVES (registration + admin)
   ========================================================= */
.field { display: flex; flex-direction: column; gap: 6px; margin-bottom: 16px; }
.field label { font-size: 13px; font-weight: 600; color: var(--ts-text); }
.field label .req { color: var(--ts-danger); margin-left: 2px; }
.field input, .field select, .field textarea { font-family: inherit; padding: 12px 14px; border: 1px solid var(--ts-line-2); border-radius: 10px; font-size: 14.5px; color: var(--ts-text); background: #fff; outline: none; transition: border-color 160ms, box-shadow 160ms; }
.field input:focus, .field select:focus, .field textarea:focus { border-color: var(--ts-primary); box-shadow: 0 0 0 3px color-mix(in srgb, var(--ts-primary) 18%, transparent); }
.field textarea { min-height: 96px; resize: vertical; line-height: 1.5; }
.field .help { font-size: 12px; color: var(--ts-text-subtle); }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.field-row.three { grid-template-columns: 1fr 1fr 1fr; }
@media (max-width: 640px) {
  .field-row, .field-row.three { grid-template-columns: 1fr; }
}
.field-checkbox { flex-direction: row; align-items: start; gap: 10px; }
.field-checkbox input { margin-top: 3px; }

/* =========================================================
   FOOTER STRIP — universal sign-off
   ========================================================= */
.sign-off { font-size: 12px; color: var(--ts-text-subtle); text-align: center; padding: 32px 0; }

/* =========================================================
   TOASTS / FLASH MESSAGES
   ========================================================= */
.toast-host { position: fixed; bottom: 24px; right: 24px; z-index: 300; display: flex; flex-direction: column; gap: 10px; pointer-events: none; }
.toast { background: var(--ts-ink); color: #fff; padding: 14px 18px; border-radius: 12px; font-size: 14px; display: flex; align-items: center; gap: 10px; box-shadow: 0 12px 32px rgba(10,22,40,0.3); max-width: 380px; pointer-events: all; }
.toast.success { background: #166B45; }
.toast.error { background: var(--ts-danger); }

/* =========================================================
   RESPONSIVE
   ========================================================= */
@media (max-width: 960px) {
  .sessions-grid { grid-template-columns: repeat(2, 1fr); }
  .ts-footer .grid { grid-template-columns: 1fr 1fr; gap: 32px; }
}
@media (max-width: 640px) {
  .section { padding: 64px 0; }
  .sessions-grid { grid-template-columns: 1fr; }
  .ts-nav .links { display: none; }
  .ts-footer .grid { grid-template-columns: 1fr; }
}