/* =========================================================
   Captain's Toolkit
   Layout System
   ========================================================= */

/* ---------- App shell ---------- */

.app-shell {
  min-height: 100vh;
  min-height: 100dvh;
  display: grid;
  grid-template-columns: var(--sidebar-width) minmax(0, 1fr);
  background:
    radial-gradient(circle at top left, rgba(37, 99, 235, 0.08), transparent 32rem),
    radial-gradient(circle at bottom right, rgba(14, 165, 233, 0.06), transparent 28rem),
    var(--color-bg);
}

.app-shell.is-locked {
  overflow: hidden;
}

/* ---------- Sidebar ---------- */

.app-sidebar {
  position: sticky;
  top: 0;
  height: 100vh;
  height: 100dvh;
  padding: var(--space-5);
  padding-top: calc(var(--space-5) + env(safe-area-inset-top));
  padding-bottom: calc(var(--space-5) + env(safe-area-inset-bottom));
  background: var(--color-navy);
  color: #ffffff;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
  overflow-y: auto;
  overscroll-behavior: contain;
  scrollbar-width: thin;
}

.app-sidebar::-webkit-scrollbar {
  width: 8px;
}

.app-sidebar::-webkit-scrollbar-thumb {
  background: rgba(255, 255, 255, 0.18);
  border-radius: var(--radius-full);
}

.sidebar-backdrop {
  display: none;
}

/* ---------- Main area ---------- */

.app-main {
  min-width: 0;
  min-height: 100vh;
  min-height: 100dvh;
  display: flex;
  flex-direction: column;
}

/* ---------- Header ---------- */

.app-header {
  position: sticky;
  top: 0;
  z-index: 30;
  min-height: var(--header-height);
  padding: var(--space-3) var(--space-5);
  padding-top: calc(var(--space-3) + env(safe-area-inset-top));
  display: flex;
  align-items: center;
  gap: var(--space-3);
  background: rgba(244, 247, 251, 0.92);
  border-bottom: 1px solid rgba(220, 227, 236, 0.86);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
}

.header-title {
  min-width: 0;
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 0.1rem;
}

.header-title strong {
  max-width: 100%;
  font-size: var(--text-lg);
  line-height: var(--leading-tight);
  color: var(--color-text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-title span {
  max-width: 100%;
  font-size: var(--text-sm);
  color: var(--color-muted);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.header-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-2);
  flex: 0 0 auto;
}

/* ---------- Banner ---------- */

.app-banner {
  margin: var(--space-5) var(--space-5) 0;
  padding: var(--space-4);
  border: 1px solid rgba(37, 99, 235, 0.16);
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #ffffff 0%, #eef6ff 100%);
  box-shadow: var(--shadow-soft);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.app-banner > div {
  min-width: 0;
}

.app-banner strong {
  display: block;
  margin-bottom: var(--space-1);
  color: var(--color-text);
  line-height: 1.3;
}

.app-banner p {
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-muted);
  line-height: var(--leading-relaxed);
}

.app-banner-actions {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex: 0 0 auto;
}

/* ---------- Screen container ---------- */

.screen-container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-5);
  padding-bottom: calc(var(--space-8) + env(safe-area-inset-bottom));
  flex: 1;
}

.screen-container-wide {
  max-width: 1480px;
}

.screen-container-narrow {
  max-width: 920px;
}

.screen {
  display: flex;
  flex-direction: column;
  gap: var(--space-5);
  min-width: 0;
}

.screen-header,
.page-head {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-4);
  min-width: 0;
}

.screen-header-content,
.page-head > div {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  min-width: 0;
}

.screen-title,
.page-head h1 {
  margin: 0;
  font-size: var(--text-3xl);
  line-height: var(--leading-tight);
  font-weight: 700;
  letter-spacing: -0.035em;
  color: var(--color-text);
}

.screen-description,
.page-description {
  max-width: 720px;
  margin: 0;
  font-size: var(--text-base);
  color: var(--color-muted);
  line-height: var(--leading-relaxed);
}

.screen-actions {
  display: flex;
  align-items: center;
  justify-content: flex-end;
  gap: var(--space-2);
  flex-wrap: wrap;
  flex: 0 0 auto;
}

/* ---------- Generic grids ---------- */

.grid {
  display: grid;
  gap: var(--space-4);
  min-width: 0;
}

.grid > * {
  min-width: 0;
}

.grid-sm {
  gap: var(--space-3);
}

.grid-lg {
  gap: var(--space-5);
}

.grid-xl {
  gap: var(--space-6);
}

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

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

.grid-4 {
  grid-template-columns: repeat(4, minmax(0, 1fr));
}

.grid-5 {
  grid-template-columns: repeat(5, minmax(0, 1fr));
}

.grid-auto-fit {
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
}

.grid-auto-fill {
  grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
}

.grid-dashboard {
  display: grid;
  grid-template-columns: repeat(12, minmax(0, 1fr));
  gap: var(--space-4);
  align-items: start;
}

.grid-dashboard > * {
  min-width: 0;
}

.col-12 {
  grid-column: span 12;
}

.col-9 {
  grid-column: span 9;
}

.col-8 {
  grid-column: span 8;
}

.col-7 {
  grid-column: span 7;
}

.col-6 {
  grid-column: span 6;
}

.col-5 {
  grid-column: span 5;
}

.col-4 {
  grid-column: span 4;
}

.col-3 {
  grid-column: span 3;
}

/* ---------- Stacks / inline ---------- */

.stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  min-width: 0;
}

.stack-sm {
  gap: var(--space-3);
}

.stack-lg {
  gap: var(--space-5);
}

.stack-xl {
  gap: var(--space-6);
}

.inline {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  flex-wrap: wrap;
  min-width: 0;
}

.inline > * {
  min-width: 0;
}

.inline-sm {
  gap: var(--space-2);
}

.inline-lg {
  gap: var(--space-4);
}

.inline-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-3);
  min-width: 0;
}

.inline-start {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  min-width: 0;
}

.inline-end {
  display: flex;
  align-items: flex-end;
  gap: var(--space-3);
  min-width: 0;
}

/* ---------- Sections ---------- */

.section {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  min-width: 0;
}

.section-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: var(--space-3);
  min-width: 0;
}

.section-header > div {
  min-width: 0;
}

.section-title {
  margin: 0;
  font-size: var(--text-lg);
  line-height: var(--leading-tight);
  font-weight: 800;
  color: var(--color-text);
}

.section-description {
  max-width: 680px;
  margin: 0;
  font-size: var(--text-sm);
  color: var(--color-muted);
  line-height: var(--leading-relaxed);
}

/* ---------- Split layouts ---------- */

.split-layout {
  display: grid;
  grid-template-columns: minmax(0, 1.45fr) minmax(280px, 0.55fr);
  gap: var(--space-5);
  align-items: start;
}

.split-layout-balanced {
  grid-template-columns: repeat(2, minmax(0, 1fr));
}

.split-layout-reverse {
  grid-template-columns: minmax(280px, 0.55fr) minmax(0, 1.45fr);
}

.split-layout > *,
.split-layout-balanced > *,
.split-layout-reverse > * {
  min-width: 0;
}

.content-panel {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  min-width: 0;
}

.side-panel {
  position: sticky;
  top: calc(var(--header-height) + var(--space-5));
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  min-width: 0;
}

/* ---------- Panels ---------- */

.layout-panel {
  min-width: 0;
  padding: var(--space-5);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-xl);
  background: #ffffff;
  box-shadow: var(--shadow-soft);
}

.layout-panel-flat {
  box-shadow: none;
}

.layout-panel-muted {
  background: rgba(248, 250, 252, 0.86);
}

/* ---------- Empty / centered states ---------- */

.centered-layout {
  width: 100%;
  max-width: 720px;
  min-height: 50vh;
  margin: 0 auto;
  display: grid;
  place-items: center;
  text-align: center;
}

.empty-layout {
  padding: var(--space-8) var(--space-5);
  border: 1px dashed var(--color-border);
  border-radius: var(--radius-xl);
  background: rgba(255, 255, 255, 0.72);
  text-align: center;
}

/* ---------- Visibility helpers ---------- */

.mobile-only {
  display: none !important;
}

.desktop-only {
  display: initial;
}

.tablet-only {
  display: none !important;
}

.print-only {
  display: none !important;
}

/* ---------- Responsive: large tablets ---------- */

@media (max-width: 1200px) {
  .screen-container {
    max-width: 1120px;
  }

  .grid-5 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
  }

  .grid-4 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid-dashboard {
    grid-template-columns: repeat(8, minmax(0, 1fr));
  }

  .col-9,
  .col-8,
  .col-7 {
    grid-column: span 8;
  }

  .col-6,
  .col-5,
  .col-4,
  .col-3 {
    grid-column: span 4;
  }
}

/* ---------- Responsive: sidebar becomes drawer ---------- */

@media (max-width: 1024px) {
  .app-shell {
    grid-template-columns: 1fr;
  }

  .app-sidebar {
    position: fixed;
    inset: 0 auto 0 0;
    z-index: 60;
    width: min(86vw, var(--sidebar-width));
    max-width: 360px;
    transform: translateX(-100%);
    transition: transform var(--transition-base);
    box-shadow: var(--shadow-floating);
  }

  .app-shell.sidebar-open .app-sidebar {
    transform: translateX(0);
  }

  .app-shell.sidebar-open::after {
    content: "";
    position: fixed;
    inset: 0;
    z-index: 50;
    background: rgba(15, 23, 42, 0.48);
    backdrop-filter: blur(2px);
    -webkit-backdrop-filter: blur(2px);
  }

  .app-main {
    width: 100%;
  }

  .screen-container {
    max-width: 920px;
    padding-inline: var(--space-5);
  }

  .grid-3 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid-4,
  .grid-5 {
    grid-template-columns: repeat(2, minmax(0, 1fr));
  }

  .grid-auto-fit,
  .grid-auto-fill {
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  }

  .split-layout,
  .split-layout-balanced,
  .split-layout-reverse {
    grid-template-columns: 1fr;
  }

  .side-panel {
    position: static;
  }

  .desktop-only {
    display: none !important;
  }

  .tablet-only {
    display: initial !important;
  }

  .mobile-only {
    display: initial !important;
  }
}

/* ---------- Responsive: mobile ---------- */

@media (max-width: 720px) {
  .app-header {
    min-height: 64px;
    padding-inline: var(--space-4);
  }

  .header-title strong {
    font-size: var(--text-base);
  }

  .header-title span {
    font-size: var(--text-xs);
  }

  .header-actions {
    gap: var(--space-1);
  }

  .app-banner {
    margin: var(--space-4) var(--space-4) 0;
    align-items: flex-start;
    flex-direction: column;
  }

  .app-banner-actions {
    width: 100%;
    align-items: stretch;
    flex-direction: column;
  }

  .app-banner-actions .button,
  .app-banner-actions .btn {
    width: 100%;
  }

  .screen-container {
    max-width: 100%;
    padding: var(--space-4);
    padding-bottom: calc(var(--bottom-nav-height) + var(--space-6) + env(safe-area-inset-bottom));
  }

  .screen {
    gap: var(--space-4);
  }

  .screen-header,
  .page-head {
    flex-direction: column;
    align-items: stretch;
    gap: var(--space-3);
  }

  .screen-title,
  .page-head h1 {
    font-size: var(--text-2xl);
    letter-spacing: -0.025em;
  }

  .screen-description,
  .page-description {
    font-size: var(--text-sm);
  }

  .screen-actions {
    width: 100%;
    justify-content: stretch;
    flex-direction: column;
    align-items: stretch;
  }

  .screen-actions .button,
  .screen-actions .btn {
    width: 100%;
  }

  .section-header,
  .inline-between {
    flex-direction: column;
    align-items: stretch;
  }

  .inline,
  .inline-start,
  .inline-end {
    align-items: stretch;
  }

  .grid-2,
  .grid-3,
  .grid-4,
  .grid-5,
  .grid-auto-fit,
  .grid-auto-fill {
    grid-template-columns: 1fr;
  }

  .grid-dashboard {
    grid-template-columns: 1fr;
  }

  .col-12,
  .col-9,
  .col-8,
  .col-7,
  .col-6,
  .col-5,
  .col-4,
  .col-3 {
    grid-column: auto;
  }

  .layout-panel {
    padding: var(--space-4);
    border-radius: var(--radius-lg);
  }

  .empty-layout {
    padding: var(--space-6) var(--space-4);
  }

  .centered-layout {
    min-height: auto;
    padding-block: var(--space-6);
  }
}

/* ---------- Small mobile ---------- */

@media (max-width: 420px) {
  .app-header {
    padding-inline: var(--space-3);
  }

  .screen-container {
    padding-inline: var(--space-3);
  }

  .app-banner {
    margin-inline: var(--space-3);
  }

  .screen-title,
  .page-head h1 {
    font-size: var(--text-xl);
  }

  .grid,
  .grid-dashboard,
  .stack,
  .section,
  .content-panel,
  .side-panel {
    gap: var(--space-3);
  }

  .layout-panel {
    padding: var(--space-3);
  }
}

/* ---------- Very small mobile ---------- */

@media (max-width: 360px) {
  .screen-container {
    padding-inline: var(--space-2);
  }

  .app-header {
    padding-inline: var(--space-3);
  }

  .app-banner {
    margin-inline: var(--space-2);
    padding: var(--space-3);
  }
}

/* ---------- Desktop-only header menu button ---------- */

@media (min-width: 1025px) {
  .app-header .icon-button:first-child {
    display: none;
  }
}

/* ---------- Print helpers ---------- */

@media print {
  .app-shell {
    display: block;
    min-height: auto;
    background: #ffffff;
  }

  .app-sidebar,
  .app-header,
  .app-banner,
  .bottom-nav,
  .screen-actions,
  .header-actions,
  .no-print {
    display: none !important;
  }

  .app-main,
  .screen-container {
    display: block;
    min-height: auto;
    max-width: none;
    width: 100%;
    padding: 0;
    margin: 0;
  }

  .screen {
    display: block;
  }

  .screen-header,
  .page-head,
  .section-header {
    display: block;
    margin-bottom: 16px;
  }

  .screen-title,
  .page-head h1 {
    font-size: 22pt;
    color: #000000;
  }

  .screen-description,
  .page-description,
  .section-description {
    color: #333333;
  }

  .grid,
  .grid-dashboard,
  .split-layout,
  .split-layout-balanced,
  .split-layout-reverse {
    display: block;
  }

  .layout-panel,
  .empty-layout {
    box-shadow: none;
    border-color: #cccccc;
    break-inside: avoid;
    page-break-inside: avoid;
  }

  .print-only {
    display: block !important;
  }

  a {
    color: #000000;
    text-decoration: none;
  }
}