/* ══════════════════════════════════════════════════════
   KURSBUCHUNG SAAS — Mobile Overrides
   Mobile-first responsive design
   Breakpoints: 640px (phone), 768px (tablet), 1024px (desktop)
   ══════════════════════════════════════════════════════ */

/* ══════════════════════════════════════════════════════
   TABLET (max 1024px)
   ══════════════════════════════════════════════════════ */
@media (max-width: 1024px) {
  :root { --panel-w: 280px; }

  .kb-l-panel  { padding: 2rem 1.5rem; }
  .kb-step-page{ padding: 2.5rem 2rem; }
  .kb-course-grid { gap: .75rem; }
}

/* ══════════════════════════════════════════════════════
   TABLET / LARGE PHONE (max 768px)
   ══════════════════════════════════════════════════════ */
@media (max-width: 768px) {

  /* Date + Slots → stack vertically */
  .kb-date-time-layout {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .kb-cal-wrap  { max-width: 100%; }
  .kb-form-grid { grid-template-columns: 1fr; }

  /* Course cards → 1 column */
  .kb-course-grid { grid-template-columns: 1fr; }

  /* Modals → full width on small screens */
  .kb-modal { max-width: 100%; border-radius: var(--r-lg); }

  /* Weekly panel text slightly smaller */
  .kb-wk-name { font-size: .74rem; }
  .kb-wk-time { font-size: .64rem; }
}

/* ══════════════════════════════════════════════════════
   PHONE (max 640px) — Main layout switch
   ══════════════════════════════════════════════════════ */
@media (max-width: 640px) {

  /* Allow page to scroll */
  html, body { overflow: auto; height: auto; }

  /* Kill custom cursor on touch */
  body         { cursor: auto; }
  #kb-cursor,
  #kb-blob,
  .kb-grain    { display: none !important; }

  /* ── App shell → vertical stack ── */
  #kb-app {
    position: relative;
    flex-direction: column;
    min-height: 100vh;
  }

  /* Hide desktop left panel, show mobile bar */
  .kb-l-panel     { display: none; }
  .kb-mobile-bar  { display: flex !important; }

  /* Right panel fills screen */
  .kb-r-panel { overflow: visible; min-height: calc(100vh - var(--header-h)); }

  /* ── Mobile header bar ── */
  .kb-mobile-bar {
    position: sticky; top: 0; z-index: 100;
    width: 100%;
  }
  .kb-mobile-logo {
    font-family: var(--font-mono); font-size: .85rem;
    color: var(--ink); letter-spacing: -.01em;
  }
  .kb-mobile-logo em { font-style: normal; color: var(--amber); }

  /* ── Step pages ── */
  .kb-step-page { padding: 1.5rem 1.25rem; }

  /* ── Overlays → vertical on phone ── */
  .kb-ov-split    { flex-direction: column; }
  .kb-ov-right    { flex: 1; min-height: 0; padding: 0; align-items: stretch; }
  .kb-login-card  { width: 100%; max-width: 100%; }

  /* ── Login overlay: hide branding panel entirely, full-screen form ──
     Two ids exist: #login-overlay (index.html) + #kb-login-overlay (app.html) */
  #login-overlay .kb-ov-left,
  #kb-login-overlay .kb-ov-left { display: none !important; }
  #login-overlay .kb-ov-right,
  #kb-login-overlay .kb-ov-right {
    padding: 2.5rem 1.5rem 2rem;
    justify-content: center;
    align-items: stretch;
    overflow-y: auto;
  }

  /* ── Home overlay left panel: slim 56px top bar with actions only ── */
  #home-overlay .kb-ov-left {
    width: 100%; height: 56px; min-height: 56px; max-height: 56px;
    padding: 0 1.25rem;
    flex-direction: row; align-items: center; flex-shrink: 0;
    border-right: none; border-bottom: 1px solid var(--border);
    overflow: hidden;
    justify-content: space-between;
  }
  /* Hide only the inner-flex content wrapper (teacher name, schedule, etc.)
     The earnings panel (#kb-earnings-panel) is controlled by JS; footer always shows. */
  #home-overlay .kb-ov-left > div:first-child { display: none !important; }
  #home-overlay .kb-ov-left > .kb-home-footer { display: flex !important; }
  /* Home footer: fills the full 56px bar */
  .kb-home-footer {
    margin-top: 0 !important;
    border-top: none !important;
    padding-top: 0 !important;
    height: 56px;
    width: 100%;
    align-items: center;
  }
  /* € button: panel hidden on mobile — amounts show as badges on student cards */
  #home-overlay #kb-earnings-panel { display: none !important; }

  /* Bar: icons only — hide button labels, enlarge icons */
  .kb-home-footer-btn {
    padding: .3rem .55rem;
    gap: 0;
    font-size: 0;          /* hides text label */
    min-width: 36px;
    justify-content: center;
  }
  .kb-home-footer-btn svg { width: 16px; height: 16px; flex-shrink: 0; }

  /* ── Course cards → 1 col ── */
  .kb-course-grid { grid-template-columns: 1fr; }
  .kb-course-card { padding: 1.25rem 1.1rem; }
  .kb-course-card:hover { transform: none; }

  /* ── Calendar ── */
  .kb-cal-day { min-height: 34px; font-size: .75rem; }

  /* ── Slots → more columns on phone ── */
  .kb-slot-grid { gap: .35rem; }
  .kb-slot-btn  { padding: .5rem .85rem; font-size: .8rem; }

  /* ── Student cards → smaller ── */
  .kb-student-card { width: 100px; }
  .kb-student-fig  { width: 60px; height: 60px; }

  /* ── Home grid → centered ── */
  .kb-home-grid { gap: .7rem; }

  /* ── Home search bar → full width on phone ── */
  .kb-home-search-wrap { max-width: 100%; }
  .kb-home-phase-header { padding: 1.5rem 1.25rem .9rem; }
  .kb-home-grid-scroll  { padding: 0 1.25rem; }
  .kb-home-phase-footer { padding: .9rem 1.25rem 1.25rem; }

  /* ── Action buttons → wrap & full width on phone ── */
  .kb-detail-actions { flex-direction: column; }
  .kb-action-btn     { width: 100%; justify-content: center; }

  /* ── btn-row ── */
  .kb-btn-row { padding-top: 1.5rem; }
  .kb-btn-primary,
  .kb-btn-ghost { width: 100%; justify-content: center; }

  /* ── Timer ── */
  .kb-timer-card { padding: 2rem 1.5rem; }

  /* ── Admin ── */
  .kb-admin-tabs .kb-a-tab { padding: .65rem .5rem; font-size: .78rem; }

  /* ── Modal → bottom sheet style on phone ── */
  .kb-modal-backdrop { align-items: flex-end; padding: 0; }
  .kb-modal {
    max-width: 100%;
    border-radius: var(--r-xl) var(--r-xl) 0 0;
    max-height: 85vh;
  }

  /* ── Weekly items → compact ── */
  .kb-wk-item { padding: .45rem .55rem; }

  /* ── Confirm card ── */
  .kb-confirm-val { font-size: .82rem; max-width: 180px; }
}

/* ══════════════════════════════════════════════════════
   TOUCH — Remove hover states that feel wrong on touch
   ══════════════════════════════════════════════════════ */
@media (hover: none) {
  .kb-student-card:hover  { transform: none; box-shadow: var(--shadow-sm); }
  .kb-course-card:hover   { transform: none; }
  .kb-btn-primary:hover   { transform: none; }

  /* Larger tap targets */
  .kb-slot-btn    { min-height: 44px; }
  .kb-cal-day     { min-height: 44px; }
  .kb-dur-pill    { padding: .65rem 1.3rem; }
  .kb-action-btn  { min-height: 48px; }
  .kb-kb-btn-primary { min-height: 48px; }
}

/* ══════════════════════════════════════════════════════
   SAFE AREAS (iPhone notch / home indicator)
   ══════════════════════════════════════════════════════ */
@supports (padding: max(0px)) {
  .kb-mobile-bar {
    padding-top: max(0px, env(safe-area-inset-top));
  }
  .kb-btn-row {
    padding-bottom: max(1rem, env(safe-area-inset-bottom));
  }
  #kb-toast {
    bottom: max(1.5rem, env(safe-area-inset-bottom));
  }
}

/* ══════════════════════════════════════════════════════
   WEEK CALENDAR MODAL — mobile
   ══════════════════════════════════════════════════════ */
@media (max-width: 640px) {
  .kb-week-modal .kb-modal { border-radius: var(--r-xl) var(--r-xl) 0 0; }
  .kb-week-col  { min-width: 120px; }
  .kb-week-grid { gap: .4rem; }

  /* Week calendar overlay: full screen auf Phone */
  #kb-wk-cal-overlay { padding: 0; align-items: flex-end; }
  .kb-wk-cal-box {
    border-radius: 16px 16px 0 0;
    max-height: 92vh;
    width: 100%;
  }

  /* Header: wrap auf zwei Zeilen */
  .kb-wk-cal-hdr {
    flex-wrap: wrap;
    gap: .35rem;
    padding: .75rem 1rem .6rem;
    row-gap: .5rem;
  }
  /* Title takes full first row */
  .kb-wk-cal-title-wrap { order: -1; flex-basis: 100%; }
  /* Nav + close on second row, evenly spaced */
  .kb-wk-cal-nav { padding: .2rem .5rem; font-size: .72rem; }
  .kb-wk-cal-today-btn {
    padding: .2rem .55rem;
    font-size: .7rem;
  }
  /* View toggle: compact pills */
  .kb-wk-view-toggle { gap: .2rem; }
  .kb-wk-vbtn {
    padding: .2rem .5rem;
    font-size: .68rem;
  }
  /* Timezone buttons: compact */
  .kb-wk-cal-tz { gap: .2rem; }
  .kb-wk-cal-tz-btn {
    padding: .2rem .45rem;
    font-size: .68rem;
  }

  /* Body: less padding so grid has more room */
  .kb-wk-cal-body { padding: .6rem .75rem 1rem; }

  /* Month grid: tighter gap */
  .kb-wk-cal-grid { gap: .25rem; }

  /* Day header cells: smaller font */
  .kb-wk-cal-day-name { font-size: .52rem; }
  .kb-wk-cal-day-num  { font-size: .95rem; }

  /* Appointment chips: smaller text, ellipsis */
  .kb-wk-cal-appt { font-size: .6rem; padding: .25rem .35rem; overflow: hidden; }
  .kb-wk-cal-appt-name,
  .kb-wk-cal-appt-time { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
}

/* ── Termine-button: hidden on desktop, shown on mobile ── */
#kb-mobile-termine-btn { display: none; }

/* ══════════════════════════════════════════════════════
   MOBILE TERMINE SHEET
   ══════════════════════════════════════════════════════ */
#kb-mobile-termine-sheet {
  display: none; /* JS controls, positioned fixed only on ≤640px */
}
@media (max-width: 640px) {
  #kb-mobile-termine-sheet {
    position: fixed; inset: 0; z-index: 600;
    flex-direction: column; justify-content: flex-end;
    background: rgba(10,12,18,.52); backdrop-filter: blur(4px);
  }
  .kb-mob-sheet-backdrop { flex: 1; }
  .kb-mob-sheet-box {
    background: var(--bg); border-radius: 20px 20px 0 0;
    max-height: 78vh; display: flex; flex-direction: column; overflow: hidden;
    box-shadow: 0 -4px 32px rgba(0,0,0,.14);
  }
  .kb-mob-sheet-hdr {
    display: flex; align-items: center; justify-content: space-between;
    padding: .85rem 1.1rem .7rem; border-bottom: 1px solid var(--border); flex-shrink: 0;
  }
  .kb-mob-sheet-title {
    font-family: var(--font-mono); font-size: .7rem; letter-spacing: .1em;
    text-transform: uppercase; color: var(--amber);
  }
  .kb-mob-sheet-body {
    overflow-y: auto; padding: .75rem 1rem 2rem;
    -webkit-overflow-scrolling: touch;
  }
  /* Termine button: visible on mobile */
  #kb-mobile-termine-btn { display: inline-flex !important; }
}

/* ══════════════════════════════════════════════════════
   CALENDAR — Month list view auf Phone
   ══════════════════════════════════════════════════════ */
@media (max-width: 640px) {
  /* Week view button: hidden (month-only on mobile) */
  #wk-view-week { display: none; }

  /* Month grid → vertical Terminliste */
  .kb-wk-mv-grid {
    display: flex; flex-direction: column; gap: 0;
    background: transparent; border: 1px solid var(--border);
    border-radius: var(--r-lg); overflow: hidden;
  }
  /* Hide weekday headers */
  .kb-wk-mv-hdr { display: none; }
  /* Hide empty padding cells */
  .kb-wk-mv-empty { display: none !important; }
  /* Hide days with no appointments */
  .kb-wk-mv-cell:not(:has(.kb-wk-mv-appt)) { display: none; }
  /* List row: day-num left, appointments right */
  .kb-wk-mv-cell {
    display: grid;
    grid-template-columns: 30px 1fr;
    gap: .25rem .5rem;
    min-height: 0;
    padding: .55rem .75rem;
    border-radius: 0;
    border-bottom: 1px solid var(--border-mid);
  }
  .kb-wk-mv-cell:last-child { border-bottom: none; }
  .kb-wk-mv-cell.is-today {
    background: rgba(200,137,26,.06);
    outline: none;
    border-left: 2px solid var(--amber);
    padding-left: calc(.75rem - 2px);
  }
  /* Day number: column 1 */
  .kb-wk-mv-num {
    grid-column: 1; grid-row: 1;
    font-size: .78rem; text-align: right;
    margin-bottom: 0; padding-top: .2rem;
  }
  /* Each appointment: column 2, stacks vertically */
  .kb-wk-mv-appt {
    grid-column: 2;
    white-space: normal; overflow: visible; text-overflow: clip;
    font-size: .76rem; padding: .2rem .45rem; line-height: 1.45;
    display: flex; align-items: center; gap: .35rem;
  }
  .kb-wk-mv-t { font-size: .68rem; }
}

/* ══════════════════════════════════════════════════════
   PRINT
   ══════════════════════════════════════════════════════ */
@media print {
  #kb-cursor, #kb-blob, .kb-grain,
  .kb-mobile-bar, .kb-l-panel,
  .kb-btn-row, #kb-toast { display: none !important; }
  body { background: #fff; color: #000; }
}

/* ══════════════════════════════════════════════════════
   MOBILE POLISH 2026-06
   Alle Regeln sind in @media-Blöcken — kein Desktop-Impact
   ══════════════════════════════════════════════════════ */

/* B. Recurring modal — single column auf Phone */
@media (max-width: 640px) {
  .kb-recur-body {
    grid-template-columns: 1fr;
    gap: 1.25rem;
  }
  .kb-recur-time-row {
    flex-wrap: wrap;
    gap: .5rem;
  }
  .kb-recur-select {
    flex: 1;
    min-width: 70px;
  }
}

/* C. Admin tabs — horizontal scrollbar statt Overflow */
@media (max-width: 640px) {
  .kb-admin-tabs {
    overflow-x: auto;
    overflow-y: visible;
    -webkit-overflow-scrolling: touch;
    border-radius: 0;
    border-left: none;
    border-right: none;
    border-top: none;
    gap: 0;
    margin-bottom: 1.25rem;
  }
  .kb-admin-tabs .kb-a-tab {
    white-space: nowrap;
    flex-shrink: 0;
    padding: .55rem .52rem;
    font-size: .68rem;
  }
}

/* E. Font sizes — Lesbarkeit auf Mobile */
@media (max-width: 640px) {
  .kb-eyebrow-text { font-size: 0.68rem; }
  .kb-label        { font-size: 0.7rem; }
  .kb-slot-name    { font-size: 0.65rem; max-width: 120px; }
}

/* F. Confirmation card — kein Overflow auf sehr schmalen Screens */
@media (max-width: 640px) {
  .kb-confirm-card { max-width: 100%; box-sizing: border-box; }
}

/* G. Touch polish — kein iOS-Blitz, sauberes :active Feedback */
@media (hover: none) {
  button, .kb-slot-btn, .t-slot,
  .t-cal-day, .kb-cal-day,
  .kb-student-card, .kb-dur-pill {
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
  }
  .kb-slot-btn:active, .t-slot:active {
    opacity: 0.72;
    transition: opacity 0.08s;
  }
  .t-cal-day:active:not(.disabled):not(.empty),
  .kb-cal-day:active {
    opacity: 0.65;
    transition: opacity 0.08s;
  }
}

/* H. termin.html — Calendar touch targets ≥44px */
@media (max-width: 640px) {
  .t-cal-day { min-height: 44px; display: flex; align-items: center; justify-content: center; }
}

/* K. Receipt modal (Zahlungsbeleg) — full-screen bottom sheet auf Phone */
@media (max-width: 640px) {
  #kb-receipt-overlay {
    align-items: flex-end;
    padding: 0;
  }
  #kb-receipt-overlay .kb-rc-box {
    width: 100%;
    max-height: 95vh;
    border-radius: 16px 16px 0 0;
  }
  /* Config pane: full width, scrollable */
  #kb-receipt-overlay .kb-rc-body { flex-direction: column; }
  #kb-receipt-overlay .kb-rc-pane-config {
    width: 100%;
    flex-shrink: unset;
    border-right: none;
    max-height: 72vh;
  }
  /* Preview pane: hidden auf Mobile */
  #kb-receipt-overlay .kb-rc-pane-preview { display: none; }
  /* Footer: stack buttons vertically */
  #kb-receipt-overlay .kb-rc-footer {
    flex-direction: column;
    gap: .45rem;
    padding: .75rem 1rem;
  }
  #kb-receipt-overlay .kb-rc-act {
    width: 100%;
    justify-content: center;
    text-align: center;
  }
}

/* I. termin.html — IBAN/BIC lesbarer mit Monospace */
@media (max-width: 640px) {
  .t-pay-method .t-pay-kv > b {
    font-family: 'IBM Plex Mono', monospace;
    font-size: .62rem;
    word-break: break-all;
  }
}

/* J. termin.html — Hero figure etwas kleiner auf sehr schmalen Screens */
@media (max-width: 380px) {
  .t-dash-fig-wrap { width: 72px; }
}

/* Safe area für termin.html Footer-Buttons */
@supports (padding: max(0px)) {
  .t-actions {
    padding-bottom: max(1rem, env(safe-area-inset-bottom));
  }
}

/* ══════════════════════════════════════════════════════
   EARNINGS BADGES — identical to desktop, no mobile override
   ══════════════════════════════════════════════════════ */

/* ══════════════════════════════════════════════════════
   ADMIN PANEL — mobile fixes
   ══════════════════════════════════════════════════════ */
@media (max-width: 640px) {
  /* "+ Schüler" → compact icon-only circle (override inline styles with !important) */
  .kb-sc-list-hd .kb-btn-primary {
    position: relative !important;
    width: 28px !important;
    height: 28px !important;
    border-radius: 50% !important;
    padding: 0 !important;
    font-size: 0 !important;
    min-width: 0 !important;
    display: inline-flex !important;
    flex-shrink: 0;
  }
  .kb-sc-list-hd .kb-btn-primary::before {
    content: "+";
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.2rem;
    line-height: 1;
    color: inherit;
  }
  /* Schnellzugriff buttons: no sticky hover/focus state on touch */
  .kb-det2-seg:hover,
  .kb-det2-seg:focus,
  .kb-det2-seg:focus-visible { background: transparent !important; outline: none !important; }
  .kb-det2-seg:active { background: rgba(14,14,14,.06) !important; }
  /* "Admin" badge hidden on mobile — redundant info in the admin panel */
  .kb-admin-badge { display: none; }
  /* Student list: Name + color dot line 1, Subject badge line 2, hide meta */
  .kb-sc-top {
    flex-wrap: wrap;
    gap: .18rem .35rem;
  }
  .kb-sc-name {
    font-size: .86rem;
    flex-shrink: 1;
    min-width: 0;
  }
  /* Color dot stays on same line as name — no changes needed */
  /* Badges wrap to line 2 */
  .kb-sc-badge,
  .kb-sc-badge-pause { flex-basis: 100%; }
  .kb-sc-meta { display: none; }

  /* Student card: no hover lift on touch */
  .kb-sc-card:hover {
    transform: none;
    box-shadow: 0 1px 4px rgba(0,0,0,.06);
    border-color: var(--border);
  }
  /* Expanded panel: remove desktop indent, align from edge */
  .kb-sc-exp-inner {
    margin-left: 0 !important;
    padding: .65rem .85rem .75rem .85rem;
  }
  /* Label column: narrower on mobile */
  .kb-sc-exp-lbl { min-width: 70px; }
  /* Links: allow wrapping so long URLs don't overflow */
  .kb-sc-exp-link { max-width: 180px; }
  /* Status chips: slightly smaller text */
  .kb-sc-exp-stat-chip { font-size: .52rem; padding: .06rem .36rem; }
  /* Action buttons: full-width, easier to tap */
  .kb-sc-exp-actions {
    flex-direction: column;
    gap: .4rem;
    margin-top: .6rem;
  }
  .kb-sc-exp-actions .kb-btn-ghost {
    width: 100% !important;
    justify-content: center;
    padding: .5rem .75rem !important;
    font-size: .72rem !important;
    text-align: center;
  }
}

/* ══════════════════════════════════════════════════════
   DIESE WOCHE SHEET — section labels + divider
   ══════════════════════════════════════════════════════ */
@media (max-width: 640px) {
  .kb-mob-section-lbl {
    font-family: var(--font-mono);
    font-size: .6rem;
    letter-spacing: .1em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: .6rem;
  }
  .kb-mob-section-div {
    height: 1px;
    background: var(--border);
    margin: .85rem 0;
  }
}

/* ══════════════════════════════════════════════════════
   STUDENT DETAIL — mobile back bar + hide top nav
   ══════════════════════════════════════════════════════ */
#kb-mob-det-back { display: none; }

@media (max-width: 640px) {
  /* Hide the 56px top bar when student detail is open */
  #home-overlay.kb-in-detail .kb-ov-left { display: none !important; }

  /* Back bar: absolute overlay at top of right panel */
  #home-overlay.kb-in-detail #kb-mob-det-back {
    display: flex;
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    z-index: 10;
    align-items: center;
    gap: .4rem;
    height: 44px;
    padding: 0 1.25rem;
    background: var(--bg);
    border: none;
    border-bottom: 1px solid var(--border);
    font-family: var(--font-mono);
    font-size: .72rem;
    color: var(--muted);
    cursor: pointer;
  }
  #home-overlay.kb-in-detail #kb-mob-det-back:active { color: var(--ink); }

  /* Push detail content below back bar */
  #home-overlay.kb-in-detail #home-phase-detail {
    padding-top: calc(44px + 1.6rem) !important;
  }
  /* Hide the in-content back button (replaced by the back bar above) */
  #home-overlay.kb-in-detail .kb-home-back-btn { display: none !important; }
}