/* Layout - Grid, flexbox, structure */

/* ============ Container ============ */
.container {
  width: var(--container-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.container-full {
  width: 100%;
  padding: 0;
}

/* ============ Flexbox ============ */
.flex {
  display: flex;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

.flex-between {
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.flex-col {
  display: flex;
  flex-direction: column;
}

.flex-1 {
  flex: 1;
}

.flex-grow {
  flex-grow: 1;
}

.flex-shrink {
  flex-shrink: 1;
}

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

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

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

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

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

.gap-8 {
  gap: var(--space-8);
}

/* ============ Grid ============ */
.grid {
  display: grid;
}

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

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

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

.grid-cols-auto {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
}

/* ============ Spacing ============ */
.m-0 {
  margin: 0;
}

.mx-auto {
  margin-left: auto;
  margin-right: auto;
}

.my-auto {
  margin-top: auto;
  margin-bottom: auto;
}

.p-0 {
  padding: 0;
}

.p-2 {
  padding: var(--space-2);
}

.p-4 {
  padding: var(--space-4);
}

.p-6 {
  padding: var(--space-6);
}

.px-4 {
  padding-left: var(--space-4);
  padding-right: var(--space-4);
}

.py-4 {
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
}

.mb-2 {
  margin-bottom: var(--space-2);
}

.mb-4 {
  margin-bottom: var(--space-4);
}

.mb-6 {
  margin-bottom: var(--space-6);
}

.mt-4 {
  margin-top: var(--space-4);
}

.mt-6 {
  margin-top: var(--space-6);
}

/* ============ Background colors ============ */
.bg-primary {
  background-color: var(--color-bg-primary);
}

.bg-secondary {
  background-color: var(--color-bg-secondary);
}

.bg-tertiary {
  background-color: var(--color-bg-tertiary);
}

.bg-page {
  background-color: var(--color-bg-page);
}

.bg-dark {
  background-color: var(--color-bg-dark);
}

.bg-success {
  background-color: var(--color-success);
}

.bg-error {
  background-color: var(--color-error);
}

.bg-warning {
  background-color: var(--color-warning);
}

.bg-primary-color {
  background-color: var(--color-primary);
}

/* ============ Display ============ */
.block {
  display: block;
}

.inline {
  display: inline;
}

.inline-block {
  display: inline-block;
}

.hidden {
  display: none;
}

.invisible {
  visibility: hidden;
}

.visible {
  visibility: visible;
}

/* ============ Text alignment ============ */
.text-left {
  text-align: left;
}

.text-center {
  text-align: center;
}

.text-right {
  text-align: right;
}

.text-justify {
  text-align: justify;
}

/* ============ Text color ============ */
.text-primary {
  color: var(--color-text-primary);
}

.text-secondary {
  color: var(--color-text-secondary);
}

.text-light {
  color: var(--color-text-light);
}

.text-success {
  color: var(--color-success);
}

.text-error {
  color: var(--color-error);
}

.text-warning {
  color: var(--color-warning);
}

.text-primary-color {
  color: var(--color-primary);
}

.text-gem {
  color: var(--color-gem);
}

/* ============ Padding variants ============ */
.py-2 {
  padding-top: var(--space-2);
  padding-bottom: var(--space-2);
}

.py-4 {
  padding-top: var(--space-4);
  padding-bottom: var(--space-4);
}

.py-6 {
  padding-top: var(--space-6);
  padding-bottom: var(--space-6);
}

.py-8 {
  padding-top: var(--space-8);
  padding-bottom: var(--space-8);
}

/* ============ Sizing utilities ============ */
.text-5xl {
  font-size: var(--font-size-5xl);
  font-weight: var(--font-weight-bold);
}

.text-4xl {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
}

.text-3xl {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
}

.text-xl {
  font-size: var(--font-size-xl);
}

.text-lg {
  font-size: var(--font-size-lg);
}

.text-sm {
  font-size: var(--font-size-sm);
}

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

/* ============ Position ============ */
.relative {
  position: relative;
}

.absolute {
  position: absolute;
}

.fixed {
  position: fixed;
}

.sticky {
  position: sticky;
}

/* ============ Size ============ */
.w-full {
  width: 100%;
}

.h-full {
  height: 100%;
}

.w-screen {
  width: 100vw;
}

.h-screen {
  height: 100vh;
}

.min-h-screen {
  min-height: 100vh;
}

/* ============ Overflow ============ */
.overflow-hidden {
  overflow: hidden;
}

.overflow-auto {
  overflow: auto;
}

.overflow-y-auto {
  overflow-y: auto;
}

.overflow-x-hidden {
  overflow-x: hidden;
}

/* ============ App structure ============ */
body {
  display: flex;
  flex-direction: column;
  height: 100vh;
  height: 100dvh;
  min-height: 100vh;
  min-height: 100dvh;
  overflow: hidden;
}

#app {
  flex: 1;
  display: flex;
  flex-direction: column;
  width: 100%;
  min-width: 0;
  min-height: 0;
  height: 100%;
}

main {
  flex: 1;
  width: 100%;
  min-width: 0;
  min-height: 0;
  overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding-bottom: var(--safe-area-bottom);
}

/* ============ App page (canonical page wrapper, Fase 9) ============
   Every page renderer that doesn't already have its own dedicated wrapper
   class (.home-page, .passport-page, .courses-page/.course-detail-page,
   .city-page, .lesson-page) should set main.className to this instead of
   the generic .container utility. .container's width formula
   (min(100% - space-8, max-width-xl), see tokens.css) is a "centered
   content with side gutters" utility meant for narrower reading columns
   - it is not a page-shell contract, and stacking it on top of #app's
   own 600px cap (Fase 2/3C) produces an inconsistent, narrower content
   width on some routes than others. .app-page instead always fills 100%
   of whatever #app currently provides, so every route shares the exact
   same available width (see docs/PROJECT_LOG.md, Fase 9 Parte 1, for the
   root-cause investigation of the #app width bug this replaces). */
.app-page {
  width: 100%;
  min-width: 0;
  box-sizing: border-box;
  padding: var(--space-4) var(--space-4) calc(var(--space-8) + var(--safe-area-bottom));
  scroll-padding-bottom: calc(var(--space-8) + var(--safe-area-bottom));
}

@media (min-width: 768px) {
  .app-page {
    padding: var(--space-6) var(--space-6) var(--space-8);
  }
}

/* Header */
header {
  flex: 0 0 auto;
  padding: var(--safe-area-top) var(--space-4) var(--space-4);
  background-color: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-bg-secondary);
  box-shadow: var(--shadow-sm);
  z-index: var(--z-fixed);
}

/* Footer/Navigation */
footer,
nav[role="navigation"] {
  padding: var(--space-4) var(--space-4) var(--safe-area-bottom);
  background-color: var(--color-bg-primary);
  border-top: 1px solid var(--color-bg-secondary);
  z-index: var(--z-fixed);
}

footer {
  flex: 0 0 auto;
  position: relative;
}

footer nav a.active {
  background: var(--color-state-selected);
  color: var(--color-state-active);
  box-shadow: inset 0 3px 0 var(--color-state-active);
}

/* ============ Stack ============ */
.stack {
  display: flex;
  flex-direction: column;
}

.stack > * + * {
  margin-top: var(--space-4);
}

.stack-sm > * + * {
  margin-top: var(--space-2);
}

.stack-lg > * + * {
  margin-top: var(--space-8);
}