/* =============================================================================
 *  MailDesk — "The Console" design system
 *  A calm, engineered workbench for support/ops staff. Character comes from a
 *  strict sans/mono split (human text vs machine data), hairline structure and
 *  one disciplined accent. Restyles Bootstrap 5.3 (loaded from CDN) via tokens
 *  + component overrides; app markup stays untouched.
 * ========================================================================== */

:root {
  /* palette — pastel + high contrast */
  --ground:      #EDF0FB;
  --surface:     #FFFFFF;
  --surface-2:   #F5F7FE;
  --ink:         #0A1020;
  --ink-2:       #232E42;
  --muted:       #5E6A82;
  --line:        #DFE3F1;
  --line-strong: #C6CEE6;
  --accent:      #0063EF;
  --accent-050:  #E4ECFF;
  --accent-100:  #C4D6FF;
  --accent-700:  #063CC0;
  --violet:      #6B28D9;
  --violet-050:  #EDE4FF;
  --ok:          #0E7A38;
  --ok-050:      #DCF4E4;
  --warn:        #9A6206;
  --warn-050:    #FBEED2;
  --bad:         #C01327;
  --bad-050:     #FCDFE3;

  /* type */
  --font-sans: 'IBM Plex Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
  --font-mono: 'IBM Plex Mono', ui-monospace, SFMono-Regular, 'SF Mono', Menlo, Consolas, monospace;

  /* shape + depth */
  --r-sm: 8px;
  --r:    11px;
  --r-lg: 16px;
  --sh-1: 0 1px 2px rgba(15,23,41,.06);
  --sh-2: 0 1px 2px rgba(15,23,41,.05), 0 8px 24px -8px rgba(15,23,41,.12);
  --sh-3: 0 2px 4px rgba(15,23,41,.05), 0 16px 40px -12px rgba(15,23,41,.18);

  /* Bootstrap remaps */
  --bs-body-font-family: var(--font-sans);
  --bs-body-color: var(--ink-2);
  --bs-body-bg: var(--ground);
  --bs-emphasis-color: var(--ink);
  --bs-secondary-color: var(--muted);
  --bs-border-color: var(--line);
  --bs-border-radius: var(--r);
  --bs-border-radius-sm: var(--r-sm);
  --bs-border-radius-lg: var(--r-lg);
  --bs-primary: var(--accent);
  --bs-primary-rgb: 0,99,239;
  --bs-link-color: var(--accent);
  --bs-link-color-rgb: 0,99,239;
  --bs-link-hover-color: var(--accent-700);
}

/* ---------- base ---------------------------------------------------------- */
* { -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; }
html, body { height: 100%; }
body {
  font-family: var(--font-sans);
  background: var(--ground);
  color: var(--ink-2);
  font-size: 14px;
  line-height: 1.55;
  letter-spacing: -0.006em;
}
h1,h2,h3,h4,h5,h6 { color: var(--ink); font-weight: 600; letter-spacing: -0.02em; line-height: 1.2; }
.h3,h1.h3 { font-size: 1.5rem; }
.h4 { font-size: 1.2rem; } .h6 { font-size: .82rem; letter-spacing: 0; }
a { text-decoration: none; }
a:hover { text-decoration: none; }
::selection { background: var(--accent-100); color: var(--ink); }
:focus-visible { outline: 3px solid var(--accent-050); outline-offset: 2px; border-radius: 4px; }

/* machine data → monospace, quiet */
code, kbd, samp, .mono { font-family: var(--font-mono); }
.text-secondary, .text-muted { color: var(--muted) !important; }

/* thin, tasteful scrollbars */
* { scrollbar-width: thin; scrollbar-color: var(--line-strong) transparent; }
*::-webkit-scrollbar { width: 10px; height: 10px; }
*::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 20px; border: 3px solid transparent; background-clip: content-box; }

/* =========================================================================
 *  APP SHELL (admin context)
 * ====================================================================== */
.topbar {
  position: sticky; top: 0; z-index: 1030;
  display: flex; align-items: center; gap: .5rem;
  height: 56px; padding: 0 .75rem;
  background: rgba(255,255,255,.85); backdrop-filter: saturate(180%) blur(10px);
  border-bottom: 1px solid var(--line);
}
.topbar .btn-hamburger {
  border: 1px solid var(--line); background: var(--surface); color: var(--ink);
  width: 40px; height: 40px; border-radius: var(--r-sm); font-size: 1.15rem; line-height: 1;
  display: inline-flex; align-items: center; justify-content: center;
}
.topbar-brand { display: inline-flex; align-items: center; gap: .5rem; color: var(--ink); font-weight: 600; }

.brand { display: inline-flex; align-items: center; gap: .6rem; color: var(--ink); font-weight: 600; }
.brand-mark {
  width: 30px; height: 30px; border-radius: 9px; flex: 0 0 auto;
  display: inline-flex; align-items: center; justify-content: center;
  background: linear-gradient(150deg, var(--accent), var(--violet));
  color: #fff; font-size: 1rem; box-shadow: inset 0 1px 0 rgba(255,255,255,.25), var(--sh-1);
}
.brand-text { font-size: 1.05rem; letter-spacing: -0.02em; }

.sidebar {
  --bs-offcanvas-width: 284px;
  background: var(--surface);
  display: flex; flex-direction: column;
}
.sidebar-head { display: flex; align-items: center; justify-content: space-between; padding: 1.15rem 1.15rem .5rem; }
.sidebar-nav { padding: .5rem .7rem; overflow-y: auto; flex: 1 1 auto; }
.sidebar-nav .nav-eyebrow {
  font-family: var(--font-mono); font-size: .66rem; letter-spacing: .14em; text-transform: uppercase;
  color: var(--muted); padding: 1rem .55rem .35rem;
}
.sidebar-nav ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 2px; }
.sidebar-nav .nav-item {
  position: relative; display: flex; align-items: center; gap: .7rem;
  padding: .55rem .65rem; border-radius: var(--r-sm);
  color: var(--ink-2); font-weight: 500; font-size: .9rem;
  transition: background .12s ease, color .12s ease;
}
.sidebar-nav .nav-item .bi { font-size: 1.05rem; color: var(--muted); transition: color .12s ease; width: 1.25rem; text-align: center; }
.sidebar-nav .nav-item:hover { background: var(--ground); color: var(--ink); }
.sidebar-nav .nav-item:hover .bi { color: var(--ink-2); }
.sidebar-nav .nav-item.active { background: var(--accent-050); color: var(--accent-700); font-weight: 600; }
.sidebar-nav .nav-item.active .bi { color: var(--accent); }
.sidebar-nav .nav-item.active::before {
  content: ""; position: absolute; left: -.7rem; top: 50%; transform: translateY(-50%);
  width: 3px; height: 1.35rem; border-radius: 0 3px 3px 0; background: var(--accent);
}

.sidebar-foot { border-top: 1px solid var(--line); padding: .8rem; display: flex; flex-direction: column; gap: .6rem; }
.sidebar-foot .user { display: flex; align-items: center; gap: .6rem; padding: .1rem .15rem; min-width: 0; }
.user-avatar {
  width: 34px; height: 34px; border-radius: 9px; flex: 0 0 auto;
  display: inline-flex; align-items: center; justify-content: center;
  background: var(--accent-050); color: var(--accent-700);
  font-family: var(--font-mono); font-weight: 600; font-size: .78rem;
}
.user-meta { display: flex; flex-direction: column; min-width: 0; line-height: 1.25; }
.user-email { color: var(--ink); font-weight: 500; font-size: .82rem; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-role { font-family: var(--font-mono); font-size: .66rem; letter-spacing: .1em; text-transform: uppercase; color: var(--muted); }
.btn-signout {
  display: inline-flex; align-items: center; justify-content: center; gap: .45rem;
  border: 1px solid var(--line); border-radius: var(--r-sm); background: var(--surface);
  color: var(--ink-2); font-weight: 500; font-size: .85rem; padding: .5rem .7rem;
  transition: background .12s ease, border-color .12s ease, color .12s ease;
}
.btn-signout:hover { background: var(--ground); color: var(--ink); border-color: var(--line-strong); }

.content { min-height: 100dvh; display: flex; flex-direction: column; }
.content-inner { width: 100%; max-width: 1120px; margin: 0 auto; padding: 1.75rem 1.5rem 2rem; flex: 1 0 auto; }
.appfoot {
  border-top: 1px solid var(--line); background: var(--surface);
  padding: .9rem 1.5rem; font-family: var(--font-mono); font-size: .72rem; color: var(--muted);
  display: flex; flex-wrap: wrap; gap: .25rem 1.25rem; justify-content: space-between; align-items: center;
}
.appfoot a { color: var(--muted); }
.appfoot a:hover { color: var(--ink-2); }

@media (min-width: 992px) {
  .sidebar.offcanvas-lg {
    position: fixed; inset: 0 auto 0 0; width: 268px;
    transform: none !important; visibility: visible !important;
    border-right: 1px solid var(--line); box-shadow: none;
  }
  .content { margin-left: 268px; }
}

/* =========================================================================
 *  PUBLIC context (login / imprint / privacy)
 * ====================================================================== */
.public-wrap { min-height: 100dvh; display: flex; flex-direction: column;
  background:
    radial-gradient(1200px 520px at 100% -8%, var(--accent-050), transparent 62%),
    radial-gradient(1000px 520px at -8% 112%, var(--violet-050), transparent 58%),
    radial-gradient(760px 420px at 50% 120%, var(--ok-050), transparent 60%),
    var(--ground);
}
.public-top { display: flex; align-items: center; justify-content: space-between; padding: 1.1rem 1.4rem; }
.public-main { flex: 1 0 auto; display: flex; flex-direction: column; justify-content: center; padding: 2rem 0; }
.public-main .card { width: 100%; max-width: 26rem; box-shadow: var(--sh-3); }
.public-foot { padding: 1rem 1.4rem; text-align: center; font-family: var(--font-mono); font-size: .72rem; color: var(--muted); }
.public-foot a { color: var(--muted); } .public-foot a:hover { color: var(--ink-2); }

/* =========================================================================
 *  COMPONENTS (Bootstrap restyle)
 * ====================================================================== */

/* buttons */
.btn { --bs-btn-font-weight: 500; --bs-btn-border-radius: var(--r-sm);
  --bs-btn-padding-y: .5rem; --bs-btn-padding-x: .9rem; letter-spacing: -0.01em; transition: all .12s ease; }
.btn-sm { --bs-btn-padding-y: .34rem; --bs-btn-padding-x: .6rem; min-height: 32px; --bs-btn-font-size: .82rem; }
.btn-primary {
  --bs-btn-bg: var(--accent); --bs-btn-border-color: var(--accent);
  --bs-btn-hover-bg: var(--accent-700); --bs-btn-hover-border-color: var(--accent-700);
  --bs-btn-active-bg: var(--accent-700); --bs-btn-active-border-color: var(--accent-700);
  --bs-btn-disabled-bg: var(--accent); --bs-btn-disabled-border-color: var(--accent);
  box-shadow: 0 1px 2px rgba(11,79,192,.28), inset 0 1px 0 rgba(255,255,255,.18);
}
.btn-primary:hover { transform: translateY(-1px); box-shadow: 0 4px 12px -2px rgba(11,79,192,.4); }
.btn-primary:active { transform: translateY(0); }
.btn-outline-secondary {
  --bs-btn-color: var(--ink-2); --bs-btn-border-color: var(--line-strong); --bs-btn-bg: var(--surface);
  --bs-btn-hover-bg: var(--ground); --bs-btn-hover-border-color: var(--line-strong); --bs-btn-hover-color: var(--ink);
  --bs-btn-active-bg: var(--ground); --bs-btn-active-color: var(--ink); --bs-btn-active-border-color: var(--line-strong);
}
.btn-outline-primary {
  --bs-btn-color: var(--accent); --bs-btn-border-color: var(--accent-100); --bs-btn-bg: var(--surface);
  --bs-btn-hover-bg: var(--accent-050); --bs-btn-hover-border-color: var(--accent); --bs-btn-hover-color: var(--accent-700);
  --bs-btn-active-bg: var(--accent-050); --bs-btn-active-color: var(--accent-700);
}
.btn-outline-success { --bs-btn-color: var(--ok); --bs-btn-border-color: #b8e2bd; --bs-btn-hover-bg: var(--ok-050); --bs-btn-hover-border-color: var(--ok); --bs-btn-hover-color: var(--ok); }
.btn-outline-danger  { --bs-btn-color: var(--bad); --bs-btn-border-color: #efc2c5; --bs-btn-hover-bg: var(--bad-050); --bs-btn-hover-border-color: var(--bad); --bs-btn-hover-color: var(--bad); }
.btn-link { --bs-btn-color: var(--muted); --bs-btn-hover-color: var(--ink); text-decoration: none; }

/* cards */
.card {
  --bs-card-border-color: var(--line); --bs-card-border-radius: var(--r-lg);
  --bs-card-bg: var(--surface); --bs-card-cap-bg: var(--surface-2);
  --bs-card-spacer-y: 1.15rem; --bs-card-spacer-x: 1.25rem;
  border: 1px solid var(--line); box-shadow: var(--sh-1);
}
.card-header { border-bottom: 1px solid var(--line); font-weight: 600; color: var(--ink); }
.card-footer { border-top: 1px solid var(--line); background: var(--surface-2); }
/* lift only cards that are actually clickable (dashboard tiles) */
.card:has(.stretched-link) { transition: transform .14s ease, box-shadow .14s ease, border-color .14s ease; }
.card:has(.stretched-link):hover { transform: translateY(-3px); box-shadow: var(--sh-2); border-color: var(--line-strong); }

/* forms */
.form-label { color: var(--ink-2); font-weight: 500; font-size: .82rem; margin-bottom: .3rem; }
.form-control, .form-select {
  border-color: var(--line-strong); border-radius: var(--r-sm); background: var(--surface);
  color: var(--ink); padding: .55rem .75rem; font-size: .9rem; transition: border-color .12s ease, box-shadow .12s ease;
}
.form-control::placeholder { color: #9aa5b2; }
.form-control:focus, .form-select:focus { border-color: var(--accent); box-shadow: 0 0 0 3px var(--accent-050); }
.form-control:hover:not(:focus), .form-select:hover:not(:focus) { border-color: var(--muted); }
.form-text { color: var(--muted); font-size: .78rem; }
.form-check-input { border-color: var(--line-strong); }
.form-check-input:checked { background-color: var(--accent); border-color: var(--accent); }
.form-check-input:focus { box-shadow: 0 0 0 3px var(--accent-050); border-color: var(--accent); }
.input-group > .form-control { border-right: 0; }

/* tables */
.table { --bs-table-bg: transparent; --bs-table-color: var(--ink-2); margin-bottom: 0; }
.table > thead th {
  font-family: var(--font-mono); font-weight: 500; font-size: .68rem; letter-spacing: .1em; text-transform: uppercase;
  color: var(--muted); border-bottom: 1px solid var(--line); padding: .6rem .75rem; background: transparent;
}
.table > tbody td { border-bottom: 1px solid var(--line); padding: .7rem .75rem; vertical-align: middle; }
.table > tbody tr:last-child td { border-bottom: 0; }
.table-hover > tbody > tr:hover > * { --bs-table-hover-bg: var(--surface-2); }
.table td.small.text-secondary, .table td .small.text-secondary { font-family: var(--font-mono); font-size: .76rem; }

/* list groups (inbox / templates) */
.list-group { --bs-list-group-border-color: var(--line); --bs-list-group-border-radius: var(--r-lg); border-radius: var(--r-lg); overflow: hidden; box-shadow: var(--sh-1); }
.list-group-item { --bs-list-group-bg: var(--surface); border-color: var(--line); padding: .8rem 1rem; color: var(--ink-2); transition: background .12s ease; }
.list-group-item-action:hover { background: var(--surface-2); }
.list-group-item-action:active { background: var(--accent-050); }
.list-group-item.active { background: var(--accent-050); border-color: var(--line); color: var(--accent-700); }
/* signature: unread rows get an accent rail */
.list-group-item.fw-semibold { position: relative; box-shadow: inset 3px 0 0 var(--accent); }
.list-group-item .text-secondary.small { font-family: var(--font-mono); font-size: .72rem; letter-spacing: -0.01em; }

/* badges — soft pills, mono */
.badge { font-family: var(--font-mono); font-weight: 600; letter-spacing: .01em; border-radius: 999px; padding: .3em .6em; font-size: .68rem; }
.badge.text-bg-primary   { background: var(--accent-050) !important; color: var(--accent-700) !important; }
.badge.text-bg-secondary { background: #eef1f5 !important; color: var(--ink-2) !important; }
.badge.text-bg-light     { background: #f0f2f6 !important; color: var(--muted) !important; }
.badge.text-bg-success   { background: var(--ok-050) !important; color: var(--ok) !important; }
.badge.text-bg-danger    { background: var(--bad-050) !important; color: var(--bad) !important; }
.badge.text-bg-warning   { background: var(--warn-050) !important; color: var(--warn) !important; }

/* alerts (flashes) — soft, with a status rail */
.alert { border: 1px solid transparent; border-radius: var(--r); padding: .8rem 1rem; box-shadow: none; position: relative; }
.alert-success { background: var(--ok-050); color: #0b5e15; border-color: #cdeccf; }
.alert-danger  { background: var(--bad-050); color: #8f0b16; border-color: #f2ccce; }
.alert-warning { background: var(--warn-050); color: #7c3d09; border-color: #f0dcc0; }
.alert-info    { background: var(--accent-050); color: var(--accent-700); border-color: var(--accent-100); }

/* breadcrumb */
.breadcrumb { --bs-breadcrumb-divider-color: var(--line-strong); font-size: .8rem; margin-bottom: 1rem; }
.breadcrumb-item a { color: var(--muted); } .breadcrumb-item a:hover { color: var(--accent); }
.breadcrumb-item.active { color: var(--ink); font-weight: 500; }

/* dropdowns */
.dropdown-menu { --bs-dropdown-border-color: var(--line); --bs-dropdown-border-radius: var(--r); border-radius: var(--r); box-shadow: var(--sh-2); padding: .35rem; }
.dropdown-item { border-radius: var(--r-sm); padding: .45rem .6rem; font-size: .88rem; color: var(--ink-2); }
.dropdown-item:hover, .dropdown-item:focus { background: var(--ground); color: var(--ink); }
.dropdown-item.active, .dropdown-item:active { background: var(--accent-050); color: var(--accent-700); }

/* =========================================================================
 *  Day workspace (Mein Tag) — two-pane master/detail
 * ====================================================================== */
.workspace { display: grid; grid-template-columns: 340px 1fr; gap: 1rem; align-items: start; }
.pane { background: var(--surface); border: 1px solid var(--line); border-radius: var(--r-lg); box-shadow: var(--sh-1); overflow: hidden; }
.pane-list { display: flex; flex-direction: column; }
.pane-head { padding: .85rem 1rem; border-bottom: 1px solid var(--line); }
.pane-scroll { padding: .4rem; overflow-y: auto; max-height: calc(100dvh - 12rem); }
.pane-detail { padding: 1.25rem 1.35rem; min-height: 42vh; }
.section-label { font-family: var(--font-mono); font-size: .66rem; letter-spacing: .13em; text-transform: uppercase; color: var(--muted); padding: .7rem .55rem .3rem; }
.task-row { display: flex; align-items: center; gap: .5rem; padding: .35rem .4rem; border-radius: var(--r-sm); transition: background .12s ease; }
.task-row:hover { background: var(--surface-2); }
.task-row.active { background: var(--accent-050); }
.task-check { width: 20px; height: 20px; flex: 0 0 auto; border: 1.5px solid var(--line-strong); background: #fff; border-radius: 50%; cursor: pointer; transition: border-color .12s ease, background .12s ease; }
.task-check:hover { border-color: var(--ok); background: var(--ok-050); }
.task-main { flex: 1 1 auto; min-width: 0; display: flex; flex-direction: column; color: var(--ink-2); }
.task-main:hover { color: var(--ink); }
.task-main .t-title { font-weight: 500; color: var(--ink); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.task-main .t-mail { color: var(--muted); font-size: .8em; }
.task-main .t-meta { font-family: var(--font-mono); font-size: .72rem; color: var(--muted); display: flex; align-items: center; gap: .35rem; }
.task-main .t-over { color: var(--bad); font-weight: 600; }
.empty-detail { text-align: center; color: var(--muted); padding: 3rem 1rem; }
.empty-detail .bi { font-size: 2rem; opacity: .5; }
.empty-detail p { max-width: 34ch; margin-inline: auto; }
.chip { display: inline-flex; align-items: center; gap: .35rem; padding: .22rem .55rem; border-radius: 999px; font-size: .76rem; font-weight: 600; }
.chip-x { border: 0; background: transparent; color: inherit; opacity: .55; cursor: pointer; line-height: 1; padding: 0 0 0 .1rem; font-size: 1rem; }
.chip-x:hover { opacity: 1; }
@media (max-width: 991px) { .workspace { grid-template-columns: 1fr; } .pane-scroll { max-height: none; } }

/* =========================================================================
 *  Email rendering (kept from Phase 2)
 * ====================================================================== */
.mail-body { width: 100%; min-height: 340px; border: 0; background: #fff; display: block; }
.mail-body-text {
  white-space: pre-wrap; word-break: break-word; margin: 0; padding: 1rem 1.25rem;
  font-family: var(--font-mono); font-size: .82rem; line-height: 1.6; color: var(--ink-2); background: #fff;
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { animation-duration: .001ms !important; transition-duration: .001ms !important; }
}