/**
 * HomeOS AI — app.css
 * Reset, typografia, layout bazowy, utilities
 * ============================================================
 */

/* ============================================================
   Reset & Base
   ============================================================ */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-text-size-adjust: 100%;
    scroll-behavior: smooth;
    height: 100%;
}

body {
    font-family:             var(--font-family);
    font-size:               var(--md-body-medium);
    line-height:             1.5;
    color:                   var(--md-on-background);
    background-color:        var(--md-background);
    min-height:              100%;
    -webkit-font-smoothing:  antialiased;
    -moz-osx-font-smoothing: grayscale;
}

img, svg, video {
    display:   block;
    max-width: 100%;
}

a {
    color:           var(--md-primary);
    text-decoration: none;
    transition:      color var(--md-motion-short2) var(--md-easing-standard);
}
a:hover { text-decoration: underline; color: var(--md-on-primary-container); }

button {
    font-family: inherit;
    cursor: pointer;
    border: none;
    background: none;
}

input, textarea, select {
    font-family: inherit;
    font-size:   inherit;
}

:focus-visible {
    outline: 3px solid var(--md-primary);
    outline-offset: 2px;
    border-radius: var(--md-shape-extra-small);
}

::selection {
    background-color: var(--md-primary-container);
    color: var(--md-on-primary-container);
}

/* ============================================================
   Aplikacja — layout bazowy
   ============================================================ */
.homeos-app {
    display:   flex;
    min-height: 100vh;
    position:  relative;
}

.main-wrapper {
    flex:      1;
    display:   flex;
    flex-direction: column;
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    transition: margin-left var(--md-motion-medium3) var(--md-easing-standard);
}

.page-content {
    flex:       1;
    padding:    calc(var(--topbar-height) + var(--page-padding)) var(--page-padding) var(--page-padding);
    max-width:  1600px;
    width:      100%;
    margin:     0 auto;
    animation:  fadeInUp var(--md-motion-medium3) var(--md-easing-decelerate) both;
}

.page-standalone {
    display:         flex;
    align-items:     center;
    justify-content: center;
    min-height:      100vh;
    width:           100%;
    padding:         var(--page-padding);
}

/* ============================================================
   Typografia
   ============================================================ */
.display-large  { font-size: var(--md-display-large);   font-weight: 400; line-height: 1.12; letter-spacing: -.25px; }
.display-medium { font-size: var(--md-display-medium);  font-weight: 400; line-height: 1.16; }
.display-small  { font-size: var(--md-display-small);   font-weight: 400; line-height: 1.22; }

.headline-large  { font-size: var(--md-headline-large);  font-weight: 400; line-height: 1.25; }
.headline-medium { font-size: var(--md-headline-medium); font-weight: 400; line-height: 1.29; }
.headline-small  { font-size: var(--md-headline-small);  font-weight: 400; line-height: 1.33; }

.title-large  { font-size: var(--md-title-large);  font-weight: 500; line-height: 1.27; letter-spacing: 0; }
.title-medium { font-size: var(--md-title-medium); font-weight: 500; line-height: 1.5;  letter-spacing: .15px; }
.title-small  { font-size: var(--md-title-small);  font-weight: 500; line-height: 1.43; letter-spacing: .1px; }

.label-large  { font-size: var(--md-label-large);  font-weight: 500; line-height: 1.43; letter-spacing: .1px; }
.label-medium { font-size: var(--md-label-medium); font-weight: 500; line-height: 1.33; letter-spacing: .5px; }
.label-small  { font-size: var(--md-label-small);  font-weight: 500; line-height: 1.45; letter-spacing: .5px; }

.body-large  { font-size: var(--md-body-large);  line-height: 1.5;  letter-spacing: .5px; }
.body-medium { font-size: var(--md-body-medium); line-height: 1.43; letter-spacing: .25px; }
.body-small  { font-size: var(--md-body-small);  line-height: 1.33; letter-spacing: .4px; }

/* ============================================================
   Kolory utilitarne
   ============================================================ */
.text-primary        { color: var(--md-primary); }
.text-secondary      { color: var(--md-secondary); }
.text-on-surface     { color: var(--md-on-surface); }
.text-on-surface-var { color: var(--md-on-surface-variant); }
.text-error          { color: var(--md-error); }
.text-success        { color: var(--md-success); }
.text-warning        { color: var(--md-warning); }
.text-muted          { color: var(--md-on-surface-variant); opacity: .7; }

/* ============================================================
   Page Header (wewnątrz page-content)
   ============================================================ */
.page-header {
    display:         flex;
    align-items:     center;
    justify-content: space-between;
    gap:             var(--gap-md);
    margin-bottom:   var(--gap-xl);
    flex-wrap:       wrap;
}

.page-header__info {}
.page-header__title {
    font-size:   var(--md-headline-small);
    font-weight: 400;
    color:       var(--md-on-surface);
}
.page-header__subtitle {
    font-size: var(--md-body-medium);
    color:     var(--md-on-surface-variant);
    margin-top: .25rem;
}

.page-header__actions {
    display: flex;
    gap:     var(--gap-sm);
    flex-wrap: wrap;
}

/* ============================================================
   Grid System
   ============================================================ */
.grid {
    display: grid;
    gap: var(--gap-md);
}
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
.grid--auto { grid-template-columns: repeat(auto-fill, minmax(280px, 1fr)); }
.grid--auto-sm { grid-template-columns: repeat(auto-fill, minmax(220px, 1fr)); }
.grid--auto-lg { grid-template-columns: repeat(auto-fill, minmax(360px, 1fr)); }

/* ============================================================
   Animacje
   ============================================================ */
@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

@keyframes slideInLeft {
    from { transform: translateX(-100%); }
    to   { transform: translateX(0); }
}

@keyframes slideInRight {
    from { transform: translateX(100%); }
    to   { transform: translateX(0); }
}

@keyframes scaleIn {
    from { transform: scale(.9); opacity: 0; }
    to   { transform: scale(1); opacity: 1; }
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

@keyframes shimmer {
    0%   { background-position: -200% 0; }
    100% { background-position: 200% 0; }
}

/* ============================================================
   Skeleton loading
   ============================================================ */
.skeleton {
    background: linear-gradient(
        90deg,
        var(--md-surface-variant) 25%,
        var(--md-surface-3) 50%,
        var(--md-surface-variant) 75%
    );
    background-size: 200% 100%;
    animation: shimmer 1.5s infinite;
    border-radius: var(--md-shape-small);
}
.skeleton--text  { height: 1em; border-radius: var(--md-shape-full); }
.skeleton--card  { height: 180px; }
.skeleton--avatar { width: 40px; height: 40px; border-radius: 50%; }

/* ============================================================
   Loader / Spinner
   ============================================================ */
.spinner {
    width:  40px;
    height: 40px;
    border: 3px solid var(--md-outline-variant);
    border-top-color: var(--md-primary);
    border-radius: 50%;
    animation: spin .8s linear infinite;
    display: inline-block;
}
.spinner--sm { width: 20px; height: 20px; border-width: 2px; }
.spinner--lg { width: 60px; height: 60px; border-width: 4px; }

.loading-overlay {
    position: fixed;
    inset:    0;
    background: var(--md-scrim);
    display:  flex;
    align-items:     center;
    justify-content: center;
    z-index: var(--z-modal-backdrop);
    animation: fadeIn var(--md-motion-short2) both;
}

/* ============================================================
   Error page (standalone)
   ============================================================ */
.error-page {
    display:         flex;
    flex-direction:  column;
    align-items:     center;
    text-align:      center;
    gap:             1rem;
    padding:         2rem;
    max-width:       480px;
    margin:          auto;
    animation:       fadeInUp var(--md-motion-medium3) var(--md-easing-decelerate) both;
}
.error-page__icon {
    width:       96px;
    height:      96px;
    background:  var(--md-surface-variant);
    border-radius: 50%;
    display:     flex;
    align-items: center;
    justify-content: center;
}
.error-page__icon .material-symbols-rounded { font-size: 48px; color: var(--md-on-surface-variant); }
.error-page__icon--error .material-symbols-rounded { color: var(--md-error); }
.error-page__code   { font-size: 72px; font-weight: 700; color: var(--md-primary); line-height: 1; }
.error-page__title  { font-size: var(--md-title-large); font-weight: 500; }
.error-page__message { color: var(--md-on-surface-variant); }
.error-page__details {
    width:      100%;
    text-align: left;
    background: var(--md-surface-variant);
    border-radius: var(--md-shape-medium);
    padding:    1rem;
    font-size:  var(--md-body-small);
}
.error-page__details pre {
    overflow: auto;
    white-space: pre-wrap;
    font-family: var(--font-family-mono);
    font-size: .75rem;
}
.error-page__actions { display: flex; gap: var(--gap-sm); flex-wrap: wrap; justify-content: center; }

/* ============================================================
   Snackbar / Toast
   ============================================================ */
.snackbar {
    position:   fixed;
    bottom:     1.5rem;
    left:       50%;
    transform:  translateX(-50%);
    display:    flex;
    align-items: center;
    gap:        .75rem;
    background: var(--md-inverse-surface);
    color:      var(--md-inverse-on-surface);
    padding:    .875rem 1.25rem;
    border-radius: var(--md-shape-extra-small);
    box-shadow: var(--md-elevation-3);
    font-size:  var(--md-body-medium);
    z-index:    var(--z-toast);
    max-width:  560px;
    width:      calc(100vw - 2rem);
    animation:  slideInUp var(--md-motion-medium3) var(--md-easing-decelerate) both;
}
.snackbar--success .material-symbols-rounded { color: var(--md-success); }
.snackbar--error   .material-symbols-rounded { color: var(--md-error); }

@keyframes slideInUp {
    from { transform: translateX(-50%) translateY(100%); opacity: 0; }
    to   { transform: translateX(-50%) translateY(0); opacity: 1; }
}

/* ============================================================
   Utilities
   ============================================================ */
.sr-only {
    position: absolute; width: 1px; height: 1px; padding: 0;
    margin: -1px; overflow: hidden; clip: rect(0,0,0,0);
    white-space: nowrap; border: 0;
}
.truncate    { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.flex        { display: flex; }
.flex-col    { display: flex; flex-direction: column; }
.flex-center { display: flex; align-items: center; justify-content: center; }
.flex-wrap   { flex-wrap: wrap; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.gap-sm { gap: var(--gap-sm); }
.gap-md { gap: var(--gap-md); }
.gap-lg { gap: var(--gap-lg); }
.w-full { width: 100%; }
.mt-auto { margin-top: auto; }
.mb-sm { margin-bottom: var(--gap-sm); }
.mb-md { margin-bottom: var(--gap-md); }
.mb-lg { margin-bottom: var(--gap-lg); }

/* ============================================================
   Responsive breakpoints
   ============================================================ */
@media (max-width: 1280px) {
    .grid--4 { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 1024px) {
    .main-wrapper { margin-left: 0; }
    .grid--4, .grid--3 { grid-template-columns: repeat(2, 1fr); }
    :root { --page-padding: 1rem; }
}
@media (max-width: 768px) {
    .grid--4, .grid--3, .grid--2 { grid-template-columns: 1fr; }
    .page-header { flex-direction: column; align-items: flex-start; }
}
@media (max-width: 480px) {
    :root { --page-padding: .75rem; }
}

/* ============================================================
   Prefers reduced motion
   ============================================================ */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration:   0.01ms !important;
        transition-duration:  0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}