/* ============================================================================
   VAULT — Cloud Storage personale
   Direzione di design: archivio/deposito privato. Le metriche dei file sono
   trattate come voci di un manifesto (indice, monospace); la zona di upload
   è una "fessura di deposito" con angoli a mirino. Un solo accento (rame),
   tutto il resto resta quieto.
   ============================================================================ */

/* ---------------------------------------------------------------------------
   1. RESET DI BASE
   --------------------------------------------------------------------------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  color-scheme: dark;
}

html[data-theme="light"] {
  color-scheme: light;
}

body {
  font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background: var(--ink);
  color: var(--text);
  min-height: 100vh;
  transition: background-color 0.2s ease, color 0.2s ease;
}

button, input {
  font-family: inherit;
  color: inherit;
}

button {
  cursor: pointer;
  border: none;
  background: none;
}

ul {
  list-style: none;
}

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

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

/* ---------------------------------------------------------------------------
   2. TOKEN DI DESIGN (variabili colore / tipografia)
   --------------------------------------------------------------------------- */
:root {
  /* Superfici */
  --ink: #0E1116;
  --surface: #171B22;
  --surface-raised: #1F242D;
  --border: #2B3240;
  --border-soft: #232934;

  /* Testo */
  --text: #E7E9EC;
  --text-muted: #8891A0;
  --text-faint: #5A6271;

  /* Accento — rame/ambra, unico colore "vivo" della UI */
  --accent: #E2933F;
  --accent-strong: #F0A85C;
  --accent-soft: rgba(226, 147, 63, 0.12);

  /* Stato */
  --success: #4FB286;
  --success-soft: rgba(79, 178, 134, 0.14);
  --danger: #E2574C;
  --danger-soft: rgba(226, 87, 76, 0.14);

  /* Tipografia */
  --font-mono: "SF Mono", "Cascadia Code", "JetBrains Mono", Consolas, "Courier New", monospace;

  /* Forma */
  --radius: 10px;
  --radius-sm: 6px;
}

html[data-theme="light"] {
  --ink: #EEF0F3;
  --surface: #FFFFFF;
  --surface-raised: #F7F8FA;
  --border: #DADFE6;
  --border-soft: #E5E8ED;

  --text: #1A1F27;
  --text-muted: #5C6470;
  --text-faint: #8A92A0;

  --accent: #C97A2E;
  --accent-strong: #B36A24;
  --accent-soft: rgba(201, 122, 46, 0.10);

  --success: #2F9468;
  --success-soft: rgba(47, 148, 104, 0.12);
  --danger: #C9402F;
  --danger-soft: rgba(201, 64, 47, 0.10);
}

/* ---------------------------------------------------------------------------
   3. BRAND
   --------------------------------------------------------------------------- */
.brand {
  display: flex;
  align-items: center;
  gap: 0.6rem;
  color: var(--accent);
}

.brand-mark {
  width: 28px;
  height: 28px;
  flex-shrink: 0;
}

.brand-name {
  font-family: var(--font-mono);
  font-size: 0.95rem;
  font-weight: 700;
  letter-spacing: 0.18em;
  color: var(--text);
}

.brand-compact .brand-mark {
  width: 22px;
  height: 22px;
}

/* ---------------------------------------------------------------------------
   4. SCHERMATA DI ACCESSO
   --------------------------------------------------------------------------- */
.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 1.5rem;
  background:
    radial-gradient(circle at 50% 0%, var(--accent-soft), transparent 60%),
    var(--ink);
}

.login-panel {
  width: 100%;
  max-width: 380px;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  box-shadow: 0 24px 60px -24px rgba(0, 0, 0, 0.45);
}

.eyebrow {
  margin-top: 1.75rem;
  font-family: var(--font-mono);
  font-size: 0.7rem;
  letter-spacing: 0.16em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.login-title {
  margin-top: 0.4rem;
  font-size: 1.3rem;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.login-form {
  width: 100%;
  margin-top: 1.75rem;
  display: flex;
  flex-direction: column;
  gap: 0.85rem;
}

.password-input {
  width: 100%;
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 0.8rem 1rem;
  font-family: var(--font-mono);
  font-size: 1rem;
  letter-spacing: 0.25em;
  text-align: center;
  color: var(--text);
  transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.password-input:focus {
  outline: none;
  border-color: var(--accent);
  box-shadow: 0 0 0 3px var(--accent-soft);
}

.login-error {
  min-height: 1.1rem;
  font-size: 0.82rem;
  color: var(--danger);
}

/* ---------------------------------------------------------------------------
   5. PULSANTI
   --------------------------------------------------------------------------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  padding: 0.7rem 1.3rem;
  border-radius: var(--radius-sm);
  font-size: 0.88rem;
  font-weight: 600;
  letter-spacing: 0.01em;
  transition: background-color 0.15s ease, color 0.15s ease, border-color 0.15s ease, transform 0.1s ease;
}

.btn:active {
  transform: translateY(1px);
}

.btn-primary {
  background: var(--accent);
  color: #1A1106;
}

.btn-primary:hover {
  background: var(--accent-strong);
}

.btn-secondary {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-secondary:hover {
  border-color: var(--accent);
  color: var(--accent);
}

.btn-ghost {
  color: var(--text-muted);
  padding: 0.55rem 0.9rem;
}

.btn-ghost:hover {
  color: var(--text);
}

.btn-block {
  width: 100%;
}

.icon-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 38px;
  height: 38px;
  border-radius: var(--radius-sm);
  color: var(--text-muted);
  transition: background-color 0.15s ease, color 0.15s ease;
}

.icon-btn:hover {
  background: var(--surface-raised);
  color: var(--text);
}

.icon {
  width: 18px;
  height: 18px;
}

/* ---------------------------------------------------------------------------
   6. HEADER APPLICAZIONE
   --------------------------------------------------------------------------- */
.app-header {
  display: flex;
  align-items: center;
  gap: 1.25rem;
  padding: 1rem 1.5rem;
  border-bottom: 1px solid var(--border);
  background: var(--surface);
  position: sticky;
  top: 0;
  z-index: 10;
}

.manifest-summary {
  flex: 1;
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-faint);
  letter-spacing: 0.02em;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

/* ---------------------------------------------------------------------------
   7. LAYOUT PRINCIPALE
   --------------------------------------------------------------------------- */
.app-main {
  max-width: 920px;
  margin: 0 auto;
  padding: 1.75rem 1.5rem 4rem;
  display: flex;
  flex-direction: column;
  gap: 1.5rem;
}

/* ---------------------------------------------------------------------------
   8. ZONA DI UPLOAD — "fessura di deposito"
   --------------------------------------------------------------------------- */
.drop-zone {
  padding: 0.75rem;
}

.drop-zone-frame {
  position: relative;
  border: 1px dashed var(--border);
  border-radius: var(--radius);
  padding: 2.75rem 1.5rem;
  background: var(--surface);
  transition: border-color 0.2s ease, background-color 0.2s ease;
}

.drop-zone.drag-active .drop-zone-frame {
  border-color: var(--accent);
  background: var(--accent-soft);
}

.corner {
  position: absolute;
  width: 18px;
  height: 18px;
  border: 2px solid var(--text-faint);
  opacity: 0.55;
  transition: border-color 0.2s ease, opacity 0.2s ease, width 0.2s ease, height 0.2s ease;
}

.corner-tl { top: -1px; left: -1px; border-right: none; border-bottom: none; border-top-left-radius: 4px; }
.corner-tr { top: -1px; right: -1px; border-left: none; border-bottom: none; border-top-right-radius: 4px; }
.corner-bl { bottom: -1px; left: -1px; border-right: none; border-top: none; border-bottom-left-radius: 4px; }
.corner-br { bottom: -1px; right: -1px; border-left: none; border-top: none; border-bottom-right-radius: 4px; }

.drop-zone.drag-active .corner {
  border-color: var(--accent);
  opacity: 1;
  width: 24px;
  height: 24px;
}

.drop-zone-content {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.6rem;
  text-align: center;
}

.drop-icon {
  width: 30px;
  height: 30px;
  color: var(--text-faint);
  margin-bottom: 0.3rem;
}

.drop-zone.drag-active .drop-icon {
  color: var(--accent);
}

.drop-text {
  font-size: 1rem;
  font-weight: 600;
}

.drop-subtext {
  font-size: 0.8rem;
  color: var(--text-faint);
  margin-bottom: 0.3rem;
}

/* ---------------------------------------------------------------------------
   9. CODA DI UPLOAD
   --------------------------------------------------------------------------- */
.upload-queue {
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
}

.upload-item {
  background: var(--surface);
  border: 1px solid var(--border-soft);
  border-radius: var(--radius-sm);
  padding: 0.7rem 0.9rem;
}

.upload-item-header {
  display: flex;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.45rem;
  font-size: 0.82rem;
}

.upload-name {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.upload-status {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-faint);
  flex-shrink: 0;
}

.progress-bar {
  height: 4px;
  background: var(--border-soft);
  border-radius: 2px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  background: var(--accent);
  transition: width 0.15s ease;
}

.upload-item.upload-done .progress-bar-fill { background: var(--success); }
.upload-item.upload-done .upload-status { color: var(--success); }
.upload-item.upload-error .progress-bar-fill { background: var(--danger); width: 100%; }
.upload-item.upload-error .upload-status { color: var(--danger); }

/* ---------------------------------------------------------------------------
   10. MANIFESTO / ELENCO FILE
   --------------------------------------------------------------------------- */
.manifest {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  overflow: hidden;
}

.manifest-header {
  display: grid;
  grid-template-columns: 2.5rem 1fr auto 5.5rem;
  gap: 1rem;
  padding: 0.7rem 1.1rem;
  border-bottom: 1px solid var(--border);
  font-family: var(--font-mono);
  font-size: 0.68rem;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-faint);
}

.col-meta { text-align: right; }
.col-actions { text-align: right; }

.file-list {
  display: flex;
  flex-direction: column;
}

.file-item {
  display: grid;
  grid-template-columns: 2.5rem 1fr auto 5.5rem;
  align-items: center;
  gap: 1rem;
  padding: 0.7rem 1.1rem;
  border-bottom: 1px solid var(--border-soft);
  transition: background-color 0.15s ease;
}

.file-item:last-child {
  border-bottom: none;
}

.file-item:hover {
  background: var(--surface-raised);
}

.file-index {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  color: var(--text-faint);
}

.file-info {
  display: flex;
  align-items: center;
  gap: 0.7rem;
  min-width: 0;
}

.file-icon {
  font-size: 1.1rem;
  flex-shrink: 0;
}

.file-name {
  display: block;
  font-size: 0.9rem;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.file-details {
  font-family: var(--font-mono);
  font-size: 0.74rem;
  color: var(--text-faint);
  white-space: nowrap;
  text-align: right;
}

.file-actions {
  display: flex;
  justify-content: flex-end;
  gap: 0.2rem;
}

.file-actions .icon-btn {
  width: 32px;
  height: 32px;
  font-size: 0.95rem;
}

.delete-btn:hover {
  color: var(--danger);
  background: var(--danger-soft);
}

.download-btn:hover {
  color: var(--accent);
  background: var(--accent-soft);
}

.loading {
  padding: 1.5rem;
  text-align: center;
  color: var(--text-faint);
  font-size: 0.85rem;
}

.empty-state {
  padding: 3rem 1.5rem;
  text-align: center;
  color: var(--text-muted);
}

.empty-subtext {
  font-size: 0.85rem;
  color: var(--text-faint);
  margin-top: 0.3rem;
}

/* ---------------------------------------------------------------------------
   11. NOTIFICHE (toast)
   --------------------------------------------------------------------------- */
.toast-container {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  display: flex;
  flex-direction: column;
  gap: 0.6rem;
  z-index: 100;
}

.toast {
  background: var(--surface-raised);
  border: 1px solid var(--border);
  border-left: 3px solid var(--text-faint);
  border-radius: var(--radius-sm);
  padding: 0.75rem 1rem;
  font-size: 0.85rem;
  max-width: 320px;
  box-shadow: 0 12px 30px -12px rgba(0, 0, 0, 0.4);
  animation: toast-in 0.2s ease;
}

.toast-success { border-left-color: var(--success); }
.toast-error { border-left-color: var(--danger); }

.toast-hide {
  opacity: 0;
  transform: translateX(8px);
  transition: opacity 0.3s ease, transform 0.3s ease;
}

@keyframes toast-in {
  from { opacity: 0; transform: translateX(12px); }
  to { opacity: 1; transform: translateX(0); }
}

/* ---------------------------------------------------------------------------
   12. RESPONSIVE
   --------------------------------------------------------------------------- */
@media (max-width: 640px) {
  .app-header {
    padding: 0.85rem 1rem;
  }

  .manifest-summary {
    display: none;
  }

  .app-main {
    padding: 1.25rem 1rem 3rem;
  }

  .drop-zone-frame {
    padding: 2rem 1rem;
  }

  .manifest-header {
    display: none;
  }

  .file-item {
    grid-template-columns: 1fr auto;
    grid-template-rows: auto auto;
    row-gap: 0.4rem;
  }

  .file-index {
    display: none;
  }

  .file-info {
    grid-column: 1;
  }

  .file-details {
    grid-column: 1;
    text-align: left;
    grid-row: 2;
  }

  .file-actions {
    grid-column: 2;
    grid-row: 1 / span 2;
    align-items: center;
  }

  .toast-container {
    left: 1rem;
    right: 1rem;
    bottom: 1rem;
  }

  .toast {
    max-width: none;
  }
}