/* Photo-sharing: foglio di stile unico, scritto a mano, nessun framework. */

:root {
  --color-bg: #f7f7fb;
  --color-surface: #ffffff;
  --color-text: #1b1b24;
  --color-muted: #5a5a6b;
  --color-border: #d8d8e2;
  --color-primary: #3a4cd1;
  --color-primary-dark: #2a38a8;
  --color-danger: #c0392b;
  --color-danger-dark: #96281c;
  --color-accent: #d80b5e;
  --color-accent-dark: #b5084e;
  --color-accent-text: #c20a54;
  --color-accent-soft: #fde8f0;
  --radius: 8px;
  --radius-lg: 12px;
  --max-width: 960px;
  font-size: 16px;
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  background: var(--color-bg);
  color: var(--color-text);
  font-family: system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
  line-height: 1.5;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--color-primary);
}

a:hover {
  color: var(--color-primary-dark);
}

.skip-link {
  position: absolute;
  left: -999px;
  top: 0;
}

.skip-link:focus {
  left: 8px;
  top: 8px;
  background: var(--color-surface);
  padding: 8px 12px;
  border-radius: var(--radius);
  z-index: 10;
}

header.site-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  flex-wrap: wrap;
}

header.site-header .brand {
  font-weight: 700;
  font-size: 1.2rem;
  text-decoration: none;
  color: var(--color-text);
}

header.site-header nav {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}

main {
  flex: 1;
  width: 100%;
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 24px 16px;
}

footer.site-footer {
  border-top: 1px solid var(--color-border);
  padding: 16px;
  text-align: center;
  font-size: 0.85rem;
  color: var(--color-muted);
}

footer.site-footer a {
  margin: 0 6px;
}

.noscript-warning {
  background: #fff3cd;
  border: 1px solid #e0c158;
  color: #6b5400;
  padding: 10px 14px;
  border-radius: var(--radius);
  margin-bottom: 16px;
}

h1 {
  font-size: 1.6rem;
  margin-top: 0;
}

h2 {
  font-size: 1.25rem;
}

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  max-width: 420px;
  margin: 0 auto;
}

.card.wide {
  max-width: 640px;
}

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

form {
  display: flex;
  flex-direction: column;
  gap: 14px;
}

label {
  font-weight: 600;
  display: block;
  margin-bottom: 4px;
}

input[type="email"],
input[type="password"],
input[type="text"],
input[type="file"],
textarea {
  width: 100%;
  padding: 10px 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  font-size: 1rem;
  background: var(--color-surface);
  color: var(--color-text);
}

textarea {
  resize: vertical;
  min-height: 70px;
}

input:focus-visible,
textarea:focus-visible,
button:focus-visible,
a:focus-visible {
  outline: 3px solid var(--color-primary);
  outline-offset: 2px;
}

button,
.button {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 10px 16px;
  border-radius: var(--radius);
  border: 1px solid var(--color-primary);
  background: var(--color-primary);
  color: #fff;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
}

button:hover,
.button:hover {
  background: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
}

button:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

button.secondary,
.button.secondary {
  background: var(--color-surface);
  color: var(--color-primary);
}

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

button.danger {
  background: var(--color-danger);
  border-color: var(--color-danger);
}

button.danger:hover {
  background: var(--color-danger-dark);
  border-color: var(--color-danger-dark);
}

button.accent,
.button.accent {
  background: var(--color-accent);
  border-color: var(--color-accent);
}

button.accent:hover,
.button.accent:hover {
  background: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
}

button.small {
  padding: 6px 10px;
  font-size: 0.85rem;
}

.error-message {
  color: var(--color-danger);
  font-weight: 600;
  min-height: 1.2em;
}

.status-message {
  color: var(--color-muted);
  min-height: 1.2em;
}

.form-footer {
  text-align: center;
  font-size: 0.9rem;
  color: var(--color-muted);
}

.app-topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}

.folders-toggle {
  display: none;
}

.app-layout {
  display: flex;
  gap: 20px;
  align-items: flex-start;
}

.folder-panel {
  flex: 0 0 220px;
  min-width: 0;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 16px;
}

.app-content {
  flex: 1;
  min-width: 0;
}

.folder-list {
  list-style: none;
  margin: 0 0 12px;
  padding: 0;
  display: flex;
  flex-direction: column;
  gap: 4px;
}

.folder-row {
  position: relative;
  display: flex;
  align-items: center;
  gap: 4px;
}

.folder-item {
  flex: 1;
  display: block;
  width: 100%;
  text-align: left;
  background: none;
  border: 1px solid transparent;
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.95rem;
  padding: 8px 10px;
  border-radius: var(--radius);
  cursor: pointer;
}

.folder-item:hover {
  background: var(--color-bg);
}

.folder-item.active {
  background: var(--color-accent-soft);
  color: var(--color-accent-text);
  font-weight: 700;
}

.folder-menu-wrap {
  position: relative;
  flex-shrink: 0;
}

.folder-menu {
  position: absolute;
  right: 0;
  top: 100%;
  z-index: 5;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
  padding: 6px;
  margin: 4px 0 0;
  list-style: none;
  min-width: 170px;
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.folder-menu li {
  margin: 0;
}

.folder-menu button {
  width: 100%;
  display: block;
  text-align: left;
  background: none;
  border: none;
  color: var(--color-text);
  font-weight: 500;
  font-size: 0.9rem;
  padding: 8px 10px;
  border-radius: var(--radius);
}

.folder-menu button:hover {
  background: var(--color-bg);
}

.folder-menu button.danger {
  background: none;
  border: none;
  color: var(--color-danger);
}

.folder-menu button.danger:hover {
  background: var(--color-bg);
}

.folder-share-box {
  margin-top: 8px;
}

.selection-bar {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-wrap: wrap;
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 12px 16px;
  margin-bottom: 16px;
}

.selection-bar p {
  margin: 0;
  font-weight: 600;
}

.selection-bar select {
  padding: 8px 10px;
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  background: var(--color-surface);
  color: var(--color-text);
  font-size: 0.95rem;
}

.photo-select {
  position: absolute;
  top: 6px;
  left: 6px;
  z-index: 2;
  display: inline-flex;
  padding: 4px;
  border-radius: 6px;
  background: rgba(255, 255, 255, 0.85);
  cursor: pointer;
}

.photo-select input {
  width: 20px;
  height: 20px;
  margin: 0;
  cursor: pointer;
}

@media (max-width: 760px) {
  .app-layout {
    flex-direction: column;
  }

  .folder-panel {
    display: none;
    width: 100%;
  }

  .folder-panel.open {
    display: block;
  }

  .folders-toggle {
    display: inline-flex;
  }
}

.upload-area {
  border: 2px dashed var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  background: var(--color-surface);
  margin-bottom: 24px;
  text-align: center;
}

.upload-area.dragover {
  border-color: var(--color-primary);
  background: #eef0fd;
}

.upload-area form {
  align-items: center;
}

.photo-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 12px;
  list-style: none;
  margin: 0;
  padding: 0;
}

@media (min-width: 540px) {
  .photo-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

@media (min-width: 760px) {
  .photo-grid {
    grid-template-columns: repeat(4, 1fr);
  }
}

.photo-grid li {
  position: relative;
  aspect-ratio: 1 / 1;
  border-radius: var(--radius);
  overflow: hidden;
  background: var(--color-border);
}

.photo-grid a {
  display: block;
  width: 100%;
  height: 100%;
}

.photo-grid img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  display: block;
}

.empty-state {
  text-align: center;
  color: var(--color-muted);
  padding: 40px 16px;
}

.photo-detail {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.photo-detail img {
  width: 100%;
  max-height: 70vh;
  object-fit: contain;
  background: #000;
  border-radius: var(--radius);
}

.photo-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
}

.share-box {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
  align-items: center;
  background: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 12px;
}

.share-box input {
  flex: 1;
  min-width: 180px;
}

.hidden {
  display: none !important;
}

.info-page {
  max-width: 720px;
  margin: 0 auto;
}

.info-page section {
  margin-bottom: 20px;
}

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  overflow: hidden;
  clip: rect(0 0 0 0);
}