/* ============================================================
   JobSynk — Layout
   Clean professional header, sidebar, main area
   ============================================================ */

.app {
  display: grid;
  grid-template-rows: auto 1fr;
  position: relative;
  z-index: var(--z-base);
  min-height: 100vh;
  overflow-x: hidden;
}

/* Header */
header {
  height: var(--header-height);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  border-bottom: 1px solid var(--color-surface-border);
  background:
    var(--color-shell-header),
    linear-gradient(90deg, rgba(196, 123, 58, 0.04), transparent 28%);
  backdrop-filter: blur(14px);
  position: sticky;
  top: 0;
  z-index: var(--z-header);
  gap: 12px;
  flex-wrap: wrap;
  box-shadow: 0 8px 24px rgba(26, 26, 26, 0.04);
}

header .brand {
  display: flex;
  gap: 10px;
  align-items: center;
  flex-shrink: 0;
}

.logo {
  width: var(--size-logo); height: var(--size-logo);
  border-radius: 10px;
  background: var(--gradient-brand);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  box-shadow: inset 0 0 0 1px rgba(196, 123, 58, 0.12);
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 700; font-size: 14px; color: var(--color-primary);
}

header h1 {
  font-family: var(--font-display);
  font-size: 15px; font-weight: 700;
  letter-spacing: 1.5px;
  color: var(--color-text-heading);
}

.header-actions {
  display: flex; gap: 6px; align-items: center; flex-wrap: wrap;
  justify-content: flex-end;
}

.header-actions .role-sel {
  max-width: 130px;
  font-size: var(--text-xs);
  padding: 5px 8px;
}

/* Layout */
.layout {
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  gap: 0;
  min-height: calc(100vh - var(--header-height));
  overflow: hidden;
}

/* Sidebar */
nav {
  border-right: 1px solid var(--color-surface-border);
  padding: 18px 12px 28px;
  position: sticky;
  top: var(--header-height);
  height: calc(100vh - var(--header-height));
  overflow-y: auto;
  background:
    var(--color-shell-nav),
    radial-gradient(circle at top left, rgba(196, 123, 58, 0.08), transparent 35%);
  z-index: var(--z-sidebar);
}

nav .group { margin-bottom: 16px; }

nav h4 {
  margin: 12px 12px 6px;
  color: var(--color-muted);
  font-family: var(--font-body);
  font-weight: 600; font-size: 10px;
  text-transform: uppercase; letter-spacing: 1.5px;
}

/* Sidebar expand/collapse */
.nav-expand-btn {
  background: none; border: none; cursor: pointer;
  width: 100%; padding: 4px 12px; text-align: left;
}
.nav-expand-btn:hover h4 { color: var(--color-text-dim); }
.nav-collapsible { animation: fadeIn 0.15s ease-out; }

/* Hamburger */
.hamburger {
  display: none;
  background: none; border: none;
  color: var(--color-text-dim);
  font-size: 20px; cursor: pointer;
  padding: 6px;
}

.sidebar-overlay {
  display: none;
  position: fixed; inset: 0;
  background: rgba(18, 16, 12, 0.48);
  backdrop-filter: blur(2px);
  z-index: calc(var(--z-sidebar) - 1);
}

body.auth-mode .layout { grid-template-columns: 1fr; }

/* Main */
main {
  padding: 24px;
  background:
    radial-gradient(circle at top right, rgba(196, 123, 58, 0.07), transparent 24%),
    var(--color-shell-main);
  overflow-x: hidden;
  overflow-y: auto;
  min-width: 0;
}
main > section {
  width: 100%;
  max-width: var(--content-max);
  margin: 0 auto;
}