/* ==========================================================================
   S3 Backup Browser — Iron Mind AI internal utility tool
   Brand system inherited from websites/iron-mind.ai/docs/brandbook.md
   See docs/brandbook.md in this project for documented deviations
   (utility-tool context: no scroll animation, larger tap targets, etc.)
   ========================================================================== */

:root {
  --color-bg-primary: #0E0E0E;
  --color-bg-surface: #161616;
  --color-bg-elevated: #1C1C1C;
  --color-accent: #E87C2E;
  --color-accent-hover: #F08C3E;
  --color-accent-subtle: rgba(232, 124, 46, 0.12);
  --color-text-primary: #FFFFFF;
  --color-text-secondary: #E8EAED;
  --color-text-muted: #888888;
  --color-border: rgba(255, 255, 255, 0.08);
  --color-border-hover: rgba(255, 255, 255, 0.16);
  --color-danger: #e05252;
  --color-danger-bg: rgba(224, 82, 82, 0.08);
  --color-danger-border: rgba(224, 82, 82, 0.25);

  --font-display: 'Barlow Condensed', sans-serif;
  --font-body: 'DM Sans', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;

  --space-1: 8px;
  --space-2: 16px;
  --space-3: 24px;
  --space-4: 32px;
  --space-5: 48px;

  --radius-sm: 3px;
  --radius-md: 4px;
  --radius-lg: 8px;

  --nav-height: 56px;
  --tap-min: 44px;

  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
}

@media (min-width: 768px) {
  :root { --nav-height: 64px; }
}

* { box-sizing: border-box; }

html, body {
  height: 100%;
}

body {
  margin: 0;
  padding: 0;
  background: var(--color-bg-primary);
  color: var(--color-text-secondary);
  font-family: var(--font-body);
  font-weight: 400;
  font-size: 16px;
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

a {
  color: inherit;
}

button, input {
  font-family: inherit;
}

/* Visible focus states everywhere — accessibility standard */
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--color-accent);
  outline-offset: 2px;
}

@media (prefers-reduced-motion: reduce) {
  * { transition: none !important; animation: none !important; }
}

/* --------------------------------------------------------------------------
   Login page
   -------------------------------------------------------------------------- */

.login-page {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-2);
}

.login-form {
  background: var(--color-bg-surface);
  border: 1px solid var(--color-border);
  padding: var(--space-4) var(--space-3);
  border-radius: var(--radius-lg);
  width: 100%;
  max-width: 380px;
  display: flex;
  flex-direction: column;
  gap: var(--space-1);
}

.login-form h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 28px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--color-text-primary);
  margin: 0 0 var(--space-3);
  text-align: center;
}

.login-form label {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin-top: var(--space-2);
}

.login-form input {
  background: var(--color-bg-elevated);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-sm);
  color: var(--color-text-primary);
  padding: 12px 14px;
  font-size: 16px; /* prevents iOS auto-zoom on focus */
  min-height: var(--tap-min);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.login-form input::placeholder {
  color: var(--color-text-muted);
  opacity: 0.7;
}

.login-form input:focus {
  outline: none;
  border-color: var(--color-accent);
  box-shadow: 0 0 0 2px rgba(232, 124, 46, 0.25);
}

.login-form button {
  margin-top: var(--space-3);
  background: var(--color-accent);
  color: var(--color-bg-primary);
  border: none;
  border-radius: var(--radius-sm);
  padding: 14px 28px;
  min-height: var(--tap-min);
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  cursor: pointer;
  transition: filter var(--transition-fast);
}

.login-form button:hover,
.login-form button:active {
  filter: brightness(1.08);
}

.error {
  color: var(--color-danger);
  background: var(--color-danger-bg);
  border: 1px solid var(--color-danger-border);
  border-radius: var(--radius-sm);
  padding: 10px 12px;
  font-size: 14px;
  margin: 0;
}

/* --------------------------------------------------------------------------
   Topbar
   -------------------------------------------------------------------------- */

.topbar {
  position: sticky;
  top: 0;
  z-index: 10;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: var(--space-2);
  height: var(--nav-height);
  padding: 0 var(--space-2);
  background: var(--color-bg-surface);
  border-bottom: 1px solid var(--color-border);
}

.topbar h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 20px;
  text-transform: uppercase;
  letter-spacing: 0.02em;
  color: var(--color-text-primary);
  margin: 0;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.logout-form {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex-shrink: 0;
}

.username {
  font-size: 13px;
  color: var(--color-text-muted);
  display: none;
}

@media (min-width: 480px) {
  .username { display: inline; }
}

.logout-form button {
  background: transparent;
  border: 1px solid var(--color-border);
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  padding: 8px 14px;
  min-height: var(--tap-min);
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  cursor: pointer;
  transition: color var(--transition-fast), border-color var(--transition-fast);
}

.logout-form button:hover {
  color: var(--color-text-primary);
  border-color: var(--color-border-hover);
}

/* --------------------------------------------------------------------------
   Breadcrumbs
   -------------------------------------------------------------------------- */

.breadcrumbs {
  background: var(--color-bg-primary);
  border-bottom: 1px solid var(--color-border);
}

.breadcrumbs ol {
  list-style: none;
  display: flex;
  align-items: center;
  gap: 2px;
  padding: var(--space-2);
  margin: 0 auto;
  max-width: 900px;
  overflow-x: auto;
  white-space: nowrap;
  -webkit-overflow-scrolling: touch;
  scrollbar-width: thin;
}

.breadcrumbs li {
  display: flex;
  align-items: center;
  font-size: 14px;
}

.breadcrumbs li:not(:last-child)::after {
  content: "/";
  margin: 0 6px;
  color: var(--color-accent);
  opacity: 0.6;
}

.breadcrumbs a {
  color: var(--color-text-muted);
  text-decoration: none;
  padding: var(--space-1) 4px;
  min-height: var(--tap-min);
  display: inline-flex;
  align-items: center;
  transition: color var(--transition-fast);
}

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

.breadcrumbs [aria-current="page"] {
  color: var(--color-text-primary);
  font-weight: 500;
  padding: var(--space-1) 4px;
}

/* --------------------------------------------------------------------------
   File browser
   -------------------------------------------------------------------------- */

.file-browser {
  padding: var(--space-2) var(--space-2) var(--space-5);
  max-width: 900px;
  margin: 0 auto;
}

.file-browser h2 {
  font-family: var(--font-body);
  font-weight: 500;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--color-text-muted);
  margin: var(--space-3) 0 var(--space-1);
}

.file-browser section:first-of-type h2 {
  margin-top: var(--space-2);
}

.entry-list {
  list-style: none;
  padding: 0;
  margin: 0;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  overflow: hidden;
  background: var(--color-bg-surface);
}

.entry {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2);
  min-height: 56px;
  border-bottom: 1px solid var(--color-border);
  transition: background var(--transition-fast);
}

.entry:last-child {
  border-bottom: none;
}

.entry:hover {
  background: var(--color-bg-elevated);
}

.entry a {
  text-decoration: none;
  color: inherit;
  display: flex;
  align-items: center;
  gap: var(--space-2);
  flex: 1;
  min-width: 0;
  min-height: var(--tap-min);
}

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

.entry-icon {
  flex-shrink: 0;
  width: 22px;
  height: 22px;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: var(--color-text-muted);
}

.entry-folder .entry-icon {
  color: var(--color-accent);
}

.entry-icon svg {
  width: 100%;
  height: 100%;
  fill: none;
  stroke: currentColor;
  stroke-width: 1.5;
}

.entry-name {
  flex: 1;
  min-width: 0;
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
  font-size: 15px;
  color: var(--color-text-secondary);
}

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

.entry-size {
  color: var(--color-text-muted);
  font-family: var(--font-mono);
  font-size: 12px;
  white-space: nowrap;
  flex-shrink: 0;
}

.entry-actions {
  display: flex;
  align-items: center;
  gap: var(--space-1);
  flex-shrink: 0;
}

.btn-download,
.btn-delete {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-width: var(--tap-min);
  min-height: var(--tap-min);
  padding: 0 12px;
  border-radius: var(--radius-sm);
  font-size: 13px;
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  text-decoration: none;
  cursor: pointer;
  border: 1px solid var(--color-border);
  background: transparent;
  color: var(--color-text-muted);
  transition: color var(--transition-fast), border-color var(--transition-fast), background var(--transition-fast);
}

.btn-download {
  color: var(--color-accent);
  border-color: rgba(232, 124, 46, 0.3);
}

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

.btn-delete {
  color: var(--color-danger);
  border-color: var(--color-danger-border);
}

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

.btn-delete:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

/* Icon-only buttons on very small screens to protect tap targets */
@media (max-width: 420px) {
  .btn-download,
  .btn-delete {
    padding: 0;
    width: var(--tap-min);
    font-size: 0; /* hide text node whitespace, icon shown via ::before */
  }
  .btn-download .btn-label,
  .btn-delete .btn-label {
    display: none;
  }
  .btn-download::before,
  .btn-delete::before {
    font-size: 16px;
    line-height: 1;
  }
  .btn-download::before { content: "\2193"; } /* down arrow */
  .btn-delete::before { content: "\2715"; }    /* multiplication x */
}

.empty-state {
  padding: var(--space-5) var(--space-2);
  text-align: center;
  color: var(--color-text-muted);
  font-size: 15px;
}

/* --------------------------------------------------------------------------
   Error page
   -------------------------------------------------------------------------- */

.error-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3);
  text-align: center;
}

.error-page h1 {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 40px;
  text-transform: uppercase;
  color: var(--color-text-primary);
  margin: 0;
}

.error-page p {
  color: var(--color-text-muted);
  margin: 0;
}

.error-page a {
  margin-top: var(--space-2);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: var(--tap-min);
  padding: 0 24px;
  border: 1px solid var(--color-accent);
  border-radius: var(--radius-sm);
  color: var(--color-accent);
  text-decoration: none;
  font-size: 13px;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: background var(--transition-fast);
}

.error-page a:hover {
  background: var(--color-accent-subtle);
}

/* --------------------------------------------------------------------------
   Small-screen refinements
   -------------------------------------------------------------------------- */

@media (max-width: 480px) {
  .file-browser { padding: var(--space-1) var(--space-1) var(--space-4); }
  .entry { padding: var(--space-1) var(--space-2); }
  .entry-size { display: none; } /* reclaim width for name + actions on narrow phones */
}