/* ============================================================
   KRONOS — Calendar Scheduler
   Style: Editorial dark, ink aesthetic, refined typographic hierarchy
   ============================================================ */

/* ---- CSS VARIABLES ---- */
:root {
  --bg:          #0d0d0f;
  --bg-2:        #131316;
  --bg-3:        #1a1a1f;
  --bg-4:        #222228;
  --surface:     #1e1e24;
  --surface-2:   #26262e;
  --border:      rgba(255,255,255,0.08);
  --border-2:    rgba(255,255,255,0.14);
  --text:        #e8e6df;
  --text-2:      #9e9b94;
  --text-3:      #5e5c58;
  --accent:      #c9a85c;
  --accent-dim:  rgba(201,168,92,0.15);
  --accent-glow: rgba(201,168,92,0.3);
  --today-ring:  #c9a85c;
  --selected-bg: rgba(201,168,92,0.12);

  /* Category colours */
  --cat-work:     #5b8dee;
  --cat-personal: #6bcf8a;
  --cat-study:    #c97ef5;
  --cat-other:    #f5a35b;

  --cat-work-dim:     rgba(91,141,238,0.18);
  --cat-personal-dim: rgba(107,207,138,0.18);
  --cat-study-dim:    rgba(201,126,245,0.18);
  --cat-other-dim:    rgba(245,163,91,0.18);

  --radius:      10px;
  --radius-sm:   6px;
  --shadow:      0 8px 32px rgba(0,0,0,0.5);
  --shadow-sm:   0 2px 12px rgba(0,0,0,0.4);

  --font-display: 'Playfair Display', Georgia, serif;
  --font-body:    'DM Sans', system-ui, sans-serif;
  --font-mono:    'DM Mono', 'Courier New', monospace;

  --topbar-h: 64px;
  --sidebar-w: 260px;
}

[data-theme="light"] {
  --bg:          #f5f3ee;
  --bg-2:        #edeae3;
  --bg-3:        #e4e1d8;
  --bg-4:        #d8d5cb;
  --surface:     #ffffff;
  --surface-2:   #f0ede6;
  --border:      rgba(0,0,0,0.08);
  --border-2:    rgba(0,0,0,0.14);
  --text:        #1a1a18;
  --text-2:      #5a5852;
  --text-3:      #9a9890;
  --accent:      #8a6a22;
  --accent-dim:  rgba(138,106,34,0.1);
  --accent-glow: rgba(138,106,34,0.25);
  --selected-bg: rgba(138,106,34,0.08);
}

/* ---- RESET & BASE ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 15px; -webkit-font-smoothing: antialiased; }

body {
  font-family: var(--font-body);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  transition: background 0.3s, color 0.3s;
}

button { font-family: var(--font-body); cursor: pointer; border: none; background: none; }
input, select, textarea { font-family: var(--font-body); }
ul { list-style: none; }
a { color: inherit; text-decoration: none; }

.hidden { display: none !important; }
.dim { opacity: 0.5; }

/* ---- SCROLLBAR ---- */
::-webkit-scrollbar { width: 6px; height: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-2); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-3); }

/* ============================================================
   TOP BAR
   ============================================================ */
.topbar {
  height: var(--topbar-h);
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 20px;
  position: sticky;
  top: 0;
  z-index: 100;
  gap: 16px;
  flex-shrink: 0;
}

.topbar-left, .topbar-right {
  display: flex;
  align-items: center;
  gap: 14px;
}

/* Brand */
.brand {
  display: flex;
  align-items: center;
  gap: 8px;
  white-space: nowrap;
}
.brand-icon {
  font-size: 1.2rem;
  color: var(--accent);
  line-height: 1;
}
.brand-name {
  font-family: var(--font-display);
  font-size: 1.15rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  color: var(--text);
}

/* Nav buttons */
.nav-controls {
  display: flex;
  align-items: center;
  gap: 4px;
}
.btn-nav {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-2);
  font-size: 1.1rem;
  transition: background 0.15s, color 0.15s;
}
.btn-nav:hover { background: var(--bg-4); color: var(--text); }

.btn-today {
  padding: 5px 14px;
  border-radius: 20px;
  border: 1px solid var(--border-2);
  color: var(--text-2);
  font-size: 0.8rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  transition: all 0.15s;
  white-space: nowrap;
}
.btn-today:hover { background: var(--bg-4); color: var(--text); border-color: var(--text-3); }

/* View title */
.view-title {
  font-family: var(--font-display);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--text);
  white-space: nowrap;
}

/* Search */
.search-wrap {
  position: relative;
  display: flex;
  align-items: center;
}
.search-icon {
  position: absolute;
  left: 10px;
  color: var(--text-3);
  font-size: 1rem;
  pointer-events: none;
}
.search-input {
  background: var(--bg-3);
  border: 1px solid var(--border);
  border-radius: 20px;
  padding: 6px 14px 6px 30px;
  color: var(--text);
  font-size: 0.82rem;
  width: 180px;
  outline: none;
  transition: border-color 0.15s, width 0.2s;
}
.search-input::placeholder { color: var(--text-3); }
.search-input:focus { border-color: var(--accent); width: 220px; }

/* View toggle */
.view-toggle {
  display: flex;
  border: 1px solid var(--border);
  border-radius: 8px;
  overflow: hidden;
}
.btn-view {
  padding: 6px 14px;
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-2);
  letter-spacing: 0.03em;
  transition: background 0.15s, color 0.15s;
  border-right: 1px solid var(--border);
}
.btn-view:last-child { border-right: none; }
.btn-view:hover { background: var(--bg-4); color: var(--text); }
.btn-view.active { background: var(--accent); color: #000; }

/* Theme toggle */
.btn-theme {
  width: 34px; height: 34px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  color: var(--text-2);
  transition: background 0.15s, color 0.15s;
}
.btn-theme:hover { background: var(--bg-4); color: var(--accent); }

/* ============================================================
   APP LAYOUT
   ============================================================ */
.app-layout {
  display: flex;
  flex: 1;
  overflow: hidden;
  height: calc(100vh - var(--topbar-h));
}

/* ============================================================
   SIDEBAR
   ============================================================ */
.sidebar {
  width: var(--sidebar-w);
  background: var(--bg-2);
  border-right: 1px solid var(--border);
  display: flex;
  flex-direction: column;
  gap: 0;
  overflow-y: auto;
  position: relative;
  flex-shrink: 0;
  transition: width 0.25s ease, opacity 0.25s;
}
.sidebar.collapsed { width: 0; overflow: hidden; opacity: 0; }

.sidebar-toggle {
  position: absolute;
  right: -14px;
  top: 20px;
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  color: var(--text-2);
  font-size: 1rem;
  display: flex; align-items: center; justify-content: center;
  z-index: 10;
  transition: transform 0.25s;
}
.sidebar.collapsed .sidebar-toggle { transform: rotate(180deg); right: -28px; }
.sidebar-toggle:hover { background: var(--bg-4); color: var(--text); }

.sidebar-section {
  padding: 20px 18px;
  border-bottom: 1px solid var(--border);
}
.sidebar-heading {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
  margin-bottom: 12px;
}

/* Filter chips */
.filter-chips { display: flex; flex-wrap: wrap; gap: 6px; }
.chip {
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.75rem;
  font-weight: 500;
  border: 1px solid var(--border-2);
  color: var(--text-2);
  background: transparent;
  transition: all 0.15s;
}
.chip:hover { background: var(--bg-3); color: var(--text); }
.chip.active { background: var(--accent); color: #000; border-color: var(--accent); }
.chip[data-cat="work"].active    { background: var(--cat-work);     color: #fff; border-color: var(--cat-work); }
.chip[data-cat="personal"].active{ background: var(--cat-personal); color: #000; border-color: var(--cat-personal); }
.chip[data-cat="study"].active   { background: var(--cat-study);    color: #fff; border-color: var(--cat-study); }
.chip[data-cat="other"].active   { background: var(--cat-other);    color: #000; border-color: var(--cat-other); }

/* Upcoming list */
.upcoming-list { display: flex; flex-direction: column; gap: 6px; max-height: 280px; overflow-y: auto; }
.upcoming-empty { font-size: 0.8rem; color: var(--text-3); font-style: italic; padding: 4px 0; }

.upcoming-item {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  padding: 8px 10px;
  border-radius: var(--radius-sm);
  background: var(--bg-3);
  cursor: pointer;
  transition: background 0.15s;
  border-left: 3px solid var(--cat-other);
}
.upcoming-item:hover { background: var(--bg-4); }
.upcoming-item[data-cat="work"]     { border-left-color: var(--cat-work); }
.upcoming-item[data-cat="personal"] { border-left-color: var(--cat-personal); }
.upcoming-item[data-cat="study"]    { border-left-color: var(--cat-study); }

.upcoming-meta { flex: 1; min-width: 0; }
.upcoming-title {
  font-size: 0.8rem;
  font-weight: 500;
  color: var(--text);
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.upcoming-date {
  font-family: var(--font-mono);
  font-size: 0.68rem;
  color: var(--text-3);
  margin-top: 2px;
}

/* Insights */
.insights-panel { display: flex; flex-direction: column; gap: 8px; }
.insight-item {
  display: flex;
  justify-content: space-between;
  align-items: center;
  font-size: 0.78rem;
}
.insight-label { color: var(--text-2); }
.insight-value {
  font-family: var(--font-mono);
  font-size: 0.76rem;
  color: var(--accent);
  font-weight: 500;
}

/* ============================================================
   CALENDAR MAIN
   ============================================================ */
.calendar-main {
  flex: 1;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  background: var(--bg);
}

.view-container {
  flex: 1;
  overflow: auto;
  display: flex;
  flex-direction: column;
  animation: fadeIn 0.2s ease;
}

@keyframes fadeIn {
  from { opacity: 0; transform: translateY(4px); }
  to   { opacity: 1; transform: translateY(0); }
}

/* ============================================================
   MONTH VIEW
   ============================================================ */
.month-header-row {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  border-bottom: 1px solid var(--border);
  background: var(--bg-2);
}
.month-header-row span {
  padding: 10px 0;
  text-align: center;
  font-family: var(--font-mono);
  font-size: 0.68rem;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--text-3);
}

.month-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  flex: 1;
  border-left: 1px solid var(--border);
  border-top: 1px solid var(--border);
}

.month-cell {
  border-right: 1px solid var(--border);
  border-bottom: 1px solid var(--border);
  min-height: 110px;
  padding: 8px;
  cursor: pointer;
  position: relative;
  background: var(--bg);
  transition: background 0.12s;
  display: flex;
  flex-direction: column;
  gap: 3px;
  overflow: hidden;
}
.month-cell:hover { background: var(--surface); }
.month-cell.other-month { background: var(--bg-2); }
.month-cell.other-month .cell-number { color: var(--text-3); }
.month-cell.today { background: var(--accent-dim); }
.month-cell.today .cell-number {
  background: var(--accent);
  color: #000;
  width: 26px; height: 26px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700;
}
.month-cell.selected { background: var(--selected-bg); }
.month-cell.busy { background: rgba(201,168,92,0.06); }
.month-cell.busy::after {
  content: '';
  position: absolute;
  top: 0; right: 0;
  width: 0; height: 0;
  border-style: solid;
  border-width: 0 10px 10px 0;
  border-color: transparent var(--accent) transparent transparent;
  opacity: 0.5;
}

.cell-number {
  font-family: var(--font-mono);
  font-size: 0.78rem;
  font-weight: 500;
  color: var(--text-2);
  width: 26px; height: 26px;
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  border-radius: 50%;
  transition: background 0.15s;
}
.month-cell:hover .cell-number { background: var(--bg-4); }
.month-cell.today:hover .cell-number { background: var(--accent); }

.cell-events { display: flex; flex-direction: column; gap: 2px; overflow: hidden; }
.event-pill {
  font-size: 0.7rem;
  padding: 2px 6px;
  border-radius: 4px;
  color: #fff;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  cursor: pointer;
  font-weight: 500;
  transition: filter 0.15s;
}
.event-pill:hover { filter: brightness(1.15); }
.event-pill[data-cat="work"]     { background: var(--cat-work); }
.event-pill[data-cat="personal"] { background: var(--cat-personal); color: #000; }
.event-pill[data-cat="study"]    { background: var(--cat-study); }
.event-pill[data-cat="other"]    { background: var(--cat-other); color: #000; }

.event-more {
  font-size: 0.66rem;
  color: var(--text-3);
  padding: 0 4px;
  font-family: var(--font-mono);
}

/* ============================================================
   WEEK VIEW
   ============================================================ */
.week-header {
  display: grid;
  grid-template-columns: 56px repeat(7, 1fr);
  border-bottom: 1px solid var(--border);
  background: var(--bg-2);
  flex-shrink: 0;
}
.week-day-header {
  padding: 10px 6px;
  text-align: center;
  border-left: 1px solid var(--border);
}
.week-day-name {
  font-family: var(--font-mono);
  font-size: 0.66rem;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--text-3);
}
.week-day-num {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 500;
  color: var(--text-2);
  display: flex; align-items: center; justify-content: center;
  width: 34px; height: 34px;
  border-radius: 50%;
  margin: 4px auto 0;
  transition: background 0.15s;
}
.week-day-header.is-today .week-day-num {
  background: var(--accent);
  color: #000;
}

.week-body {
  display: flex;
  flex: 1;
  overflow: auto;
}
.week-columns {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  flex: 1;
  position: relative;
}

/* ============================================================
   TIME GUTTER (shared by week & day)
   ============================================================ */
.time-gutter {
  width: 56px;
  flex-shrink: 0;
  border-right: 1px solid var(--border);
  background: var(--bg-2);
}
.gutter-hour {
  height: 60px;
  display: flex;
  align-items: flex-start;
  justify-content: flex-end;
  padding: 4px 8px 0 0;
  font-family: var(--font-mono);
  font-size: 0.62rem;
  color: var(--text-3);
  flex-shrink: 0;
}

/* Week column */
.week-col {
  border-left: 1px solid var(--border);
  position: relative;
  min-height: 1440px; /* 24 × 60px */
}
.week-col.is-today { background: var(--accent-dim); }

/* Hour lines */
.hour-line {
  position: absolute;
  left: 0; right: 0;
  border-top: 1px solid var(--border);
  height: 60px;
  pointer-events: none;
}

/* Day column */
.day-header {
  background: var(--bg-2);
  border-bottom: 1px solid var(--border);
  padding: 16px 20px;
  flex-shrink: 0;
}
.day-title {
  font-family: var(--font-display);
  font-size: 1.5rem;
  font-weight: 600;
  color: var(--text);
}
.day-subtitle {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  color: var(--text-3);
  margin-top: 2px;
}

.day-body {
  display: flex;
  flex: 1;
  overflow: auto;
}
.day-column {
  flex: 1;
  position: relative;
  min-height: 1440px;
  border-left: 1px solid var(--border);
}
.day-slot {
  position: absolute;
  left: 0; right: 0;
  height: 60px;
  border-top: 1px solid var(--border);
  cursor: pointer;
  transition: background 0.12s;
}
.day-slot:hover { background: var(--accent-dim); }

/* Event blocks in week/day */
.event-block {
  position: absolute;
  left: 4px; right: 4px;
  border-radius: 6px;
  padding: 4px 6px;
  cursor: pointer;
  font-size: 0.72rem;
  font-weight: 500;
  overflow: hidden;
  z-index: 1;
  transition: filter 0.15s, transform 0.1s;
  border-left: 3px solid rgba(0,0,0,0.2);
}
.event-block:hover { filter: brightness(1.15); transform: translateX(1px); }
.event-block[data-cat="work"]     { background: var(--cat-work-dim);     color: var(--cat-work);     border-left-color: var(--cat-work); }
.event-block[data-cat="personal"] { background: var(--cat-personal-dim); color: var(--cat-personal); border-left-color: var(--cat-personal); }
.event-block[data-cat="study"]    { background: var(--cat-study-dim);    color: var(--cat-study);    border-left-color: var(--cat-study); }
.event-block[data-cat="other"]    { background: var(--cat-other-dim);    color: var(--cat-other);    border-left-color: var(--cat-other); }

.event-block-title { white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.event-block-time { font-family: var(--font-mono); font-size: 0.62rem; opacity: 0.7; }

.all-day-strip {
  position: absolute;
  top: 4px; left: 4px; right: 4px;
  border-radius: 4px;
  padding: 2px 6px;
  font-size: 0.7rem;
  font-weight: 500;
  z-index: 1;
  cursor: pointer;
}

/* Current time indicator */
.time-now-line {
  position: absolute;
  left: 0; right: 0;
  height: 2px;
  background: #e5534b;
  z-index: 5;
  pointer-events: none;
}
.time-now-line::before {
  content: '';
  position: absolute;
  left: -4px; top: -4px;
  width: 10px; height: 10px;
  border-radius: 50%;
  background: #e5534b;
}

/* ============================================================
   FAB
   ============================================================ */
.fab {
  position: fixed;
  bottom: 28px;
  right: 28px;
  width: 52px; height: 52px;
  border-radius: 50%;
  background: var(--accent);
  color: #000;
  font-size: 1.6rem;
  font-weight: 300;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 4px 20px var(--accent-glow);
  z-index: 50;
  transition: transform 0.15s, box-shadow 0.15s;
}
.fab:hover { transform: scale(1.08); box-shadow: 0 6px 28px var(--accent-glow); }
.fab:active { transform: scale(0.95); }

/* ============================================================
   MODAL
   ============================================================ */
.modal-overlay {
  position: fixed; inset: 0;
  background: rgba(0,0,0,0.65);
  backdrop-filter: blur(4px);
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: overlayIn 0.2s ease;
}
@keyframes overlayIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border-2);
  border-radius: 14px;
  width: 100%;
  max-width: 460px;
  box-shadow: var(--shadow);
  animation: modalIn 0.2s ease;
}
.modal-sm { max-width: 380px; padding: 24px; }

@keyframes modalIn {
  from { opacity: 0; transform: scale(0.96) translateY(8px); }
  to   { opacity: 1; transform: scale(1) translateY(0); }
}

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 20px 24px 0;
  margin-bottom: 16px;
}
.modal-title {
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 600;
  color: var(--text);
}
.modal-close {
  width: 30px; height: 30px;
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: var(--text-3);
  font-size: 1.2rem;
  transition: background 0.15s, color 0.15s;
}
.modal-close:hover { background: var(--bg-4); color: var(--text); }

.modal-form { padding: 0 24px 24px; display: flex; flex-direction: column; gap: 14px; }

.form-group { display: flex; flex-direction: column; gap: 5px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 12px; }

.form-group label {
  font-size: 0.74rem;
  font-weight: 500;
  color: var(--text-2);
  letter-spacing: 0.02em;
}
.required { color: var(--accent); }

.form-group input,
.form-group select,
.form-group textarea {
  background: var(--bg-3);
  border: 1px solid var(--border-2);
  border-radius: var(--radius-sm);
  padding: 9px 12px;
  color: var(--text);
  font-size: 0.85rem;
  outline: none;
  transition: border-color 0.15s;
  width: 100%;
}
.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus { border-color: var(--accent); }
.form-group textarea { resize: vertical; min-height: 70px; }
select option { background: var(--bg-3); }

/* Suggestion box */
.suggestion-box {
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  background: var(--accent-dim);
  border: 1px solid var(--accent-glow);
  font-size: 0.78rem;
  color: var(--accent);
}
.suggestion-icon { font-size: 0.9rem; }

/* Modal actions */
.modal-actions {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 4px;
}
.modal-actions-right { display: flex; gap: 8px; }

.btn-save {
  padding: 9px 20px;
  border-radius: var(--radius-sm);
  background: var(--accent);
  color: #000;
  font-weight: 600;
  font-size: 0.82rem;
  letter-spacing: 0.02em;
  transition: filter 0.15s;
}
.btn-save:hover { filter: brightness(1.1); }

.btn-cancel {
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-2);
  color: var(--text-2);
  font-size: 0.82rem;
  transition: background 0.15s;
}
.btn-cancel:hover { background: var(--bg-4); }

.btn-delete {
  padding: 9px 16px;
  border-radius: var(--radius-sm);
  border: 1px solid rgba(229,83,75,0.35);
  color: #e5534b;
  font-size: 0.82rem;
  background: rgba(229,83,75,0.08);
  transition: background 0.15s;
}
.btn-delete:hover { background: rgba(229,83,75,0.2); }

.conflict-msg {
  padding: 0 0 20px;
  font-size: 0.85rem;
  color: var(--text-2);
  line-height: 1.5;
}

/* ============================================================
   TOAST
   ============================================================ */
.toast {
  position: fixed;
  bottom: 28px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  align-items: center;
  gap: 10px;
  background: var(--surface-2);
  border: 1px solid var(--border-2);
  border-radius: 30px;
  padding: 10px 20px;
  box-shadow: var(--shadow);
  z-index: 300;
  font-size: 0.82rem;
  color: var(--text);
  animation: toastIn 0.25s ease;
  max-width: 90vw;
}
@keyframes toastIn {
  from { opacity: 0; transform: translateX(-50%) translateY(12px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}
.toast-icon { font-size: 1rem; }
.toast-close {
  color: var(--text-3);
  font-size: 1rem;
  line-height: 1;
  padding: 0 0 0 6px;
}
.toast-close:hover { color: var(--text); }

/* ============================================================
   DRAG & DROP
   ============================================================ */
.dragging { opacity: 0.4; cursor: grabbing !important; }
.drag-over { background: var(--accent-dim) !important; outline: 2px dashed var(--accent); outline-offset: -2px; }

/* ============================================================
   RESPONSIVE
   ============================================================ */
@media (max-width: 900px) {
  .sidebar { position: absolute; z-index: 90; height: calc(100% - var(--topbar-h)); box-shadow: var(--shadow); }
  .sidebar.collapsed { transform: translateX(-100%); width: var(--sidebar-w); opacity: 1; }
  .brand-name { display: none; }
  .search-input { width: 130px; }
  .search-input:focus { width: 160px; }
}
@media (max-width: 640px) {
  .topbar { padding: 0 12px; gap: 8px; }
  .topbar-left { gap: 8px; }
  .topbar-right { gap: 8px; }
  .view-toggle .btn-view { padding: 6px 9px; font-size: 0.72rem; }
  .btn-theme { display: none; }
  .search-wrap { display: none; }
  .month-cell { min-height: 72px; padding: 5px; }
  .view-title { font-size: 0.95rem; }
  .event-pill { font-size: 0.62rem; }
  .fab { bottom: 18px; right: 18px; }
}