/* =============================================================================
   Race Day Operations Timetable — Stylesheet
   =============================================================================
   Designed for readability in a range of lighting conditions (bright pitlane
   office, dark media centre, tablet in direct sunlight).
   High-contrast text, clearly differentiated row states, prominent status
   indicators.
   ============================================================================= */

/* ---------------------------------------------------------------------------
   Design tokens (CSS custom properties)
   --------------------------------------------------------------------------- */
:root {
    /* Brand — Motorsport UK */
    --clr-primary:        #002f7a;   /* Motorsport UK blue */
    --clr-primary-dark:   #001c50;
    --clr-primary-mid:    #1a4a9e;
    --clr-primary-light:  #eef2f9;
    --clr-accent:         #cc1111;   /* racing red accent */

    /* Status colours */
    --clr-success:        #167a3a;
    --clr-success-bg:     #d6f0e0;
    --clr-warning:        #7a5400;
    --clr-warning-bg:     #fff0c0;
    --clr-danger:         #9b1b1b;
    --clr-danger-bg:      #fde8e8;
    --clr-info:           #0b5265;
    --clr-info-bg:        #d0eaf4;
    --clr-curfew:         #7c4700;
    --clr-curfew-bg:      #ffeeba;

    /* Neutrals */
    --clr-text:           #161b25;
    --clr-text-muted:     #68717d;
    --clr-border:         #d0d6e0;
    --clr-border-light:   #e8ecf2;
    --clr-bg:             #f0f3f8;
    --clr-white:          #ffffff;
    --clr-row-done:       #f3f5f9;
    --clr-row-cancelled:  #ebebef;

    /* Typography */
    --font-sans:    'Barlow', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-display: 'Barlow Semi Condensed', 'Barlow', sans-serif;
    --font-mono:    'JetBrains Mono', 'SFMono-Regular', Consolas, monospace;

    /* Sizing */
    --radius:    5px;
    --radius-lg: 10px;
    --shadow:    0 1px 4px rgba(0,20,60,.10), 0 1px 2px rgba(0,20,60,.06);
    --shadow-md: 0 3px 10px rgba(0,20,60,.12), 0 1px 3px rgba(0,20,60,.08);
    --shadow-lg: 0 8px 28px rgba(0,20,60,.18), 0 2px 6px rgba(0,20,60,.10);
}

/* ---------------------------------------------------------------------------
   Base reset
   --------------------------------------------------------------------------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { font-size: 15px; }

body {
    font-family: var(--font-sans);
    background: var(--clr-bg);
    color: var(--clr-text);
    line-height: 1.5;
    min-height: 100vh;
}

/* ---------------------------------------------------------------------------
   Header bar — event name, circuit, date, live clock
   --------------------------------------------------------------------------- */
#header-bar {
    background: var(--clr-primary);
    color: var(--clr-white);
    padding: .65rem 1.4rem;
    display: flex;
    align-items: center;
    gap: 1.4rem;
    flex-wrap: wrap;
    border-top: 3px solid var(--clr-accent);
    box-shadow: 0 2px 8px rgba(0,20,60,.25);
    position: relative;
}

#header-bar h1 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
    flex: 1 1 auto;
    min-width: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

#header-bar .header-meta {
    font-family: var(--font-display);
    font-size: .82rem;
    font-weight: 600;
    letter-spacing: .03em;
    opacity: .78;
    white-space: nowrap;
}

#clock {
    font-family: var(--font-mono);
    font-size: 1.35rem;
    font-weight: 500;
    letter-spacing: .08em;
    white-space: nowrap;
    background: rgba(255,255,255,.1);
    padding: .2rem .6rem;
    border-radius: var(--radius);
    border: 1px solid rgba(255,255,255,.15);
}

/* ---------------------------------------------------------------------------
   Status banners — running variance and curfew countdown
   --------------------------------------------------------------------------- */
#status-bar {
    display: flex;
    gap: .6rem;
    padding: .5rem 1.4rem;
    background: var(--clr-white);
    border-bottom: 1px solid var(--clr-border);
    flex-wrap: wrap;
    align-items: center;
    box-shadow: 0 1px 0 var(--clr-border-light);
}

.status-pill {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    padding: .25rem .8rem;
    border-radius: 4px;
    font-family: var(--font-display);
    font-size: .82rem;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
    border: 1.5px solid transparent;
}

/* Variance pill colour states */
.status-pill.on-time    { background: var(--clr-success-bg); color: var(--clr-success);  border-color: var(--clr-success); }
.status-pill.late-minor { background: var(--clr-warning-bg); color: var(--clr-warning);  border-color: var(--clr-warning); }
.status-pill.late-major { background: var(--clr-danger-bg);  color: var(--clr-danger);   border-color: var(--clr-danger);  }
.status-pill.early      { background: var(--clr-info-bg);    color: var(--clr-info);     border-color: var(--clr-info);    }
.status-pill.neutral    { background: #ebedf2;               color: var(--clr-text-muted); border-color: #c0c6d0; }

/* Curfew pill colour states */
.curfew-pill            { background: var(--clr-primary-light); color: var(--clr-primary); border: 1.5px solid var(--clr-primary-mid); }
.curfew-pill.warn       { background: var(--clr-curfew-bg);    color: var(--clr-curfew);   border-color: var(--clr-curfew); }
.curfew-pill.danger     { background: var(--clr-danger-bg);    color: var(--clr-danger);   border-color: var(--clr-danger); }

/* ---------------------------------------------------------------------------
   Controls bar — event selector, ops mode toggle, nav links
   --------------------------------------------------------------------------- */
#controls-bar {
    display: flex;
    align-items: center;
    gap: .65rem;
    padding: .5rem 1.4rem;
    background: var(--clr-white);
    border-bottom: 2px solid var(--clr-border);
    flex-wrap: wrap;
}

#controls-bar label {
    font-family: var(--font-display);
    font-size: .8rem;
    font-weight: 700;
    letter-spacing: .05em;
    text-transform: uppercase;
    color: var(--clr-text-muted);
}

/* ---------------------------------------------------------------------------
   Buttons
   --------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: .3rem;
    padding: .38rem .8rem;
    border-radius: var(--radius);
    font-family: var(--font-display);
    font-size: .82rem;
    font-weight: 700;
    letter-spacing: .03em;
    text-transform: uppercase;
    cursor: pointer;
    border: 1.5px solid transparent;
    transition: background .12s, color .12s, border-color .12s, box-shadow .12s;
    text-decoration: none;
    white-space: nowrap;
    line-height: 1.4;
}

.btn-primary  {
    background: var(--clr-primary);
    color: var(--clr-white);
    border-color: var(--clr-primary);
}
.btn-primary:hover {
    background: var(--clr-primary-dark);
    border-color: var(--clr-primary-dark);
    box-shadow: 0 2px 6px rgba(0,20,80,.2);
}

.btn-secondary {
    background: var(--clr-white);
    color: var(--clr-primary);
    border-color: var(--clr-primary-mid);
}
.btn-secondary:hover {
    background: var(--clr-primary-light);
    border-color: var(--clr-primary);
}

.btn-success  { background: var(--clr-success); color: var(--clr-white); border-color: var(--clr-success); }
.btn-success:hover { filter: brightness(.9); box-shadow: 0 2px 6px rgba(0,80,40,.2); }

.btn-danger   { background: var(--clr-danger); color: var(--clr-white); border-color: var(--clr-danger); }
.btn-danger:hover { filter: brightness(.9); }

.btn-warning  { background: #e6a800; color: #1a1000; border-color: #c89200; }
.btn-warning:hover { filter: brightness(.95); }

.btn-sm {
    padding: .2rem .5rem;
    font-size: .75rem;
    letter-spacing: .02em;
}

.btn:disabled { opacity: .45; cursor: not-allowed; }

/* Ops mode active indicator */
#btn-ops-mode.active {
    background: var(--clr-success);
    color: var(--clr-white);
    border-color: var(--clr-success);
}

/* ---------------------------------------------------------------------------
   Form controls
   --------------------------------------------------------------------------- */
select, input[type="text"], input[type="date"], input[type="time"],
input[type="number"], textarea {
    font-family: var(--font-sans);
    font-size: .9rem;
    padding: .38rem .6rem;
    border: 1.5px solid var(--clr-border);
    border-radius: var(--radius);
    background: var(--clr-white);
    color: var(--clr-text);
    width: 100%;
    transition: border-color .12s, box-shadow .12s;
}

select:focus, input:focus, textarea:focus {
    outline: none;
    border-color: var(--clr-primary-mid);
    box-shadow: 0 0 0 3px rgba(0,47,122,.12);
}

textarea { resize: vertical; min-height: 60px; }

.form-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: .75rem;
    margin-bottom: .75rem;
}

.form-group { display: flex; flex-direction: column; gap: .25rem; }
.form-group label {
    font-family: var(--font-display);
    font-size: .78rem;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
    color: var(--clr-text-muted);
}
.form-group.checkbox { flex-direction: row; align-items: center; gap: .5rem; }
.form-group.checkbox label {
    font-size: .88rem;
    color: var(--clr-text);
    font-weight: 400;
    text-transform: none;
    letter-spacing: 0;
}
.form-group.checkbox input[type="checkbox"] { width: auto; }

/* ---------------------------------------------------------------------------
   Main timetable table
   --------------------------------------------------------------------------- */
#timetable-wrapper {
    overflow-x: auto;
    padding: 1rem 1.4rem;
}

#timetable {
    width: 100%;
    min-width: 1080px;
    border-collapse: separate;
    border-spacing: 0;
    font-size: .8rem;
    box-shadow: var(--shadow-md);
    background: var(--clr-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
}

/* ---- Column-group header colours ---- */
:root {
    --grp-sched:    #1a3f8f;   /* darker blue — scheduled */
    --grp-override: #2a5a60;   /* teal        — clerk overrides */
    --grp-actual:   #196040;   /* dark green  — actual entered */
    --grp-advised:  #7a5400;   /* amber       — advised (derived) */
    --grp-pred:     #4a0d7a;   /* purple      — predicted */
    --grp-gap:      #2a3a50;   /* dark slate  — gap/variance */
}

/* Row 1 group-spanning headers */
#timetable thead th.th-group {
    font-size: .68rem;
    letter-spacing: .1em;
    padding: .4rem .4rem;
    border-bottom: 1px solid rgba(255,255,255,.15);
}
#timetable thead .th-group-sched    { background: var(--grp-sched);    }
#timetable thead .th-group-override { background: var(--grp-override); }
#timetable thead .th-group-actual   { background: var(--grp-actual);   }
#timetable thead .th-group-advised  { background: var(--grp-advised);  }
#timetable thead .th-group-pred     { background: var(--grp-pred);     }
#timetable thead .th-group-gap      { background: var(--grp-gap);      }

/* Row 2 sub-headers (tighter padding) */
#timetable thead tr:nth-child(2) th {
    font-size: .65rem;
    padding: .3rem .35rem;
    border-top: 1px solid rgba(255,255,255,.12);
    vertical-align: middle;
}
/* Sub-header group colouring (slightly lighter than group row) */
#timetable thead tr:nth-child(2) .th-group-sched    { background: color-mix(in srgb, var(--grp-sched)    70%, var(--clr-primary)); }
#timetable thead tr:nth-child(2) .th-group-override { background: color-mix(in srgb, var(--grp-override) 70%, var(--clr-primary)); }
#timetable thead tr:nth-child(2) .th-group-actual   { background: color-mix(in srgb, var(--grp-actual)   70%, var(--clr-primary)); }
#timetable thead tr:nth-child(2) .th-group-advised  { background: color-mix(in srgb, var(--grp-advised)  70%, var(--clr-primary)); }
#timetable thead tr:nth-child(2) .th-group-pred     { background: color-mix(in srgb, var(--grp-pred)     70%, var(--clr-primary)); }
#timetable thead tr:nth-child(2) .th-group-gap      { background: color-mix(in srgb, var(--grp-gap)      70%, var(--clr-primary)); }

/* Header row base */
#timetable thead th {
    background: var(--clr-primary);
    color: rgba(255,255,255,.92);
    font-family: var(--font-display);
    font-size: .7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    padding: .55rem .45rem;
    text-align: center;
    white-space: nowrap;
    border-right: 1px solid rgba(255,255,255,.1);
    position: sticky;
    top: 0;
    z-index: 1;
}

/* ---- Column widths ---- */
#timetable .col-num         { width: 2rem;  text-align: center; }
#timetable .col-series      { width: 10rem; text-align: left; }
#timetable .col-session     { width: 4rem;  text-align: center; }
#timetable .col-flags       { width: 8rem;  white-space: normal; line-height: 1.7; }
#timetable .col-mins        { width: 2.6rem; }
/* Scheduled */
#timetable .col-sched-start  { width: 3.2rem; }
#timetable .col-sched-finish { width: 3.2rem; }
#timetable .col-sched-tidy   { width: 2.6rem; }
/* Override */
#timetable .col-dur-ovr      { width: 3.5rem; }
#timetable .col-tidy-ovr     { width: 3.5rem; }
/* Actual */
#timetable .col-act-grid     { width: 3.2rem; }
#timetable .col-act-gfl      { width: 3.2rem; }
#timetable .col-act-start    { width: 3.2rem; }
#timetable .col-act-finish   { width: 3.2rem; }
/* Advised */
#timetable .col-adv-grid     { width: 3.2rem; }
#timetable .col-adv-gfl      { width: 3.2rem; }
/* Predicted */
#timetable .col-pred-start   { width: 3.2rem; }
#timetable .col-pred-finish  { width: 3.2rem; }
/* Gap */
#timetable .col-var          { width: 2.6rem; font-family: var(--font-mono); font-weight: 600; }
#timetable .col-slip         { width: 2.4rem; font-family: var(--font-mono); }
#timetable .col-diff         { width: 2.4rem; font-family: var(--font-mono); }
/* Status */
#timetable .col-status       { width: 5.2rem; }

/* Time-value columns: monospace font */
#timetable .col-sched-start,
#timetable .col-sched-finish,
#timetable .col-act-grid,
#timetable .col-act-gfl,
#timetable .col-act-start,
#timetable .col-act-finish,
#timetable .col-adv-grid,
#timetable .col-adv-gfl,
#timetable .col-pred-start,
#timetable .col-pred-finish {
    font-family: var(--font-mono);
    font-size: .78rem;
}

/* Data cells */
#timetable tbody td {
    padding: .45rem .4rem;
    border-bottom: 1px solid var(--clr-border-light);
    border-right: 1px solid var(--clr-border-light);
    vertical-align: middle;
    text-align: center;
    white-space: nowrap;
}

#timetable tbody td:last-child { border-right: none; }
#timetable tbody tr:last-child td { border-bottom: none; }

#timetable tbody td.col-series  { text-align: left; }
#timetable tbody td.col-session { text-align: center; }

/* Subtle left-border separators between column groups */
#timetable tbody .col-mins,
#timetable tbody .col-dur-ovr,
#timetable tbody .col-act-grid,
#timetable tbody .col-adv-grid,
#timetable tbody .col-pred-start,
#timetable tbody .col-var,
#timetable tbody .col-status {
    border-left: 1px solid var(--clr-border);
}

/* Strikethrough style for overridden planned values */
.plan-val {
    text-decoration: line-through;
    color: var(--clr-text-muted);
    font-size: .73rem;
    margin-right: .25rem;
}

/* N/A cell style */
.na-val { color: var(--clr-text-muted); }

/* Row colour states */
tr.row-completed   { background: var(--clr-row-done); color: var(--clr-text-muted); }
tr.row-active      { background: var(--clr-success-bg); }
tr.row-cancelled   { background: var(--clr-row-cancelled); text-decoration: line-through; color: var(--clr-text-muted); }
tr.row-red-flagged { background: var(--clr-danger-bg); }


/* Diff cell span colours (Late = amber, Early/under = muted green) */

/* Active row left border accent */
tr.row-active td:first-child {
    border-left: 4px solid var(--clr-success);
    padding-left: calc(.55rem - 2px);
}

/* Predicted times */
.pred-time { font-style: italic; color: var(--clr-text-muted); font-size: .8rem; }
.pred-time.late  { color: var(--clr-danger); font-style: italic; }
.pred-time.early { color: var(--clr-info);   font-style: italic; }

/* ---------------------------------------------------------------------------
   Badges — GFL / start-type / pit-stop chips
   --------------------------------------------------------------------------- */
.badge {
    display: inline-block;
    padding: .1rem .38rem;
    border-radius: 3px;
    font-family: var(--font-display);
    font-size: .7rem;
    font-weight: 700;
    letter-spacing: .04em;
    text-transform: uppercase;
}

.badge-standing { background: #d6f0e0; color: #135c2c; }
.badge-rolling  { background: #d0eaf4; color: #0b5265; }
.badge-yes      { background: #fff0c0; color: #7a5400; }
.badge-weather  { background: var(--clr-warning-bg); color: var(--clr-warning); }

/* Session status chip */
.status-chip {
    display: inline-block;
    padding: .14rem .48rem;
    border-radius: 4px;
    font-family: var(--font-display);
    font-size: .7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .05em;
}

.chip-pending    { background: #e8eaf0; color: #505870; }
.chip-active     { background: var(--clr-success-bg); color: var(--clr-success); }
.chip-completed  { background: #dce8f7; color: #194880; }
.chip-red-flagged{ background: var(--clr-danger-bg); color: var(--clr-danger); }
.chip-cancelled  { background: var(--clr-row-cancelled); color: var(--clr-text-muted); }

/* ---------------------------------------------------------------------------
   Inline ops editing
   --------------------------------------------------------------------------- */
.ops-field { display: none; }

body.ops-active .ops-field {
    display: block;
    margin-top: .25rem;
    font-size: .8rem;
    padding: .2rem .3rem;
    border: 1.5px solid var(--clr-border);
    border-radius: var(--radius);
    background: var(--clr-white);
    color: var(--clr-text);
    width: 100%;
    max-width: 90px;
}

body.ops-active .ops-field:focus {
    border-color: var(--clr-primary-mid);
    outline: none;
    box-shadow: 0 0 0 2px rgba(0,47,122,.1);
}

/* Duration override input */
body.ops-active .ops-dur-field { max-width: 70px; }

/* Actual time columns: input + ⏱ button sit side-by-side on one line.
   Override the default block display so the row height stays tight. */
body.ops-active td.col-act-grid input[type="time"],
body.ops-active td.col-act-gfl  input[type="time"],
body.ops-active td.col-act-start  input[type="time"],
body.ops-active td.col-act-finish input[type="time"] {
    display: inline-block;
    width: auto;
    margin-top: 0;
    vertical-align: middle;
}
body.ops-active td.col-act-grid,
body.ops-active td.col-act-gfl,
body.ops-active td.col-act-start,
body.ops-active td.col-act-finish {
    white-space: nowrap;
}

/* "Set to now" clock button beside each time input */
.btn-now {
    display: none;
}
body.ops-active .btn-now {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: auto;
    max-width: none;
    margin-top: 0;
    margin-left: .15rem;
    padding: 0 .25rem;
    background: none;
    border: 1px solid var(--clr-border);
    border-radius: 3px;
    color: var(--clr-text-muted);
    font-size: .75rem;
    line-height: 1.6;
    cursor: pointer;
    vertical-align: middle;
}
body.ops-active .btn-now:hover {
    background: var(--clr-border);
    color: var(--clr-text);
}

/* Status select */
body.ops-active .ops-status-select { max-width: 100px; width: 100px; }

/* Display values remain visible above their inputs in ops mode */
body.ops-active td .cell-disp {
    display: block;
    font-size: .72rem;
    color: var(--clr-text-muted);
    margin-bottom: .15rem;
    line-height: 1.3;
}

/* Override and Actual columns: show only the input in ops mode — the input
   is pre-populated with the current value so no separate display is needed */
body.ops-active td.col-dur-ovr   .cell-disp,
body.ops-active td.col-tidy-ovr  .cell-disp,
body.ops-active td.col-act-grid  .cell-disp,
body.ops-active td.col-act-gfl   .cell-disp,
body.ops-active td.col-act-start .cell-disp,
body.ops-active td.col-act-finish .cell-disp { display: none; }

/* Ops controls column */
.col-ops { padding: 0 !important; overflow: hidden; width: 0; border: none !important; }
body.ops-active .col-ops {
    width: auto;
    padding: .35rem .45rem !important;
    border-right: 1px solid var(--clr-border-light) !important;
}

.ops-controls { display: none; }
body.ops-active .ops-controls { display: flex; }

.ops-btn-row { display: flex; gap: .25rem; align-items: center; flex-wrap: nowrap; }

/* Dirty row — Update button turns green */
tr.ops-dirty .btn-update-row {
    background: var(--clr-success);
    color: var(--clr-white);
    border-color: var(--clr-success);
}

/* Tidy override input (narrow number field) */
body.ops-active .ops-tidy-field { max-width: 58px; }

/* ---------------------------------------------------------------------------
   Flags column
   --------------------------------------------------------------------------- */

/* Pit-stop badge */
.badge-pits { background: #d0eaf4; color: #0b5265; }

/* Track condition badges */
.badge-track-dry { background: #fff0c0; color: #7a5400; }
.badge-track-wet { background: #d0eaf4; color: #0b5265; }

/* ---------------------------------------------------------------------------
   Weather notes mini-modal
   --------------------------------------------------------------------------- */
#weather-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,10,30,.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
    backdrop-filter: blur(2px);
}
#weather-modal-overlay.hidden { display: none; }

#weather-modal {
    background: var(--clr-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 420px;
    padding: 1.4rem;
    border-top: 3px solid var(--clr-primary);
}
#weather-modal h3 {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--clr-primary);
    margin-bottom: .25rem;
}

/* ---------------------------------------------------------------------------
   Footer bar
   --------------------------------------------------------------------------- */
#footer-bar {
    padding: .45rem 1.4rem;
    font-size: .78rem;
    color: var(--clr-text-muted);
    border-top: 1px solid var(--clr-border);
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    background: var(--clr-white);
}

@keyframes spin { to { transform: rotate(360deg); } }
.spinning { display: inline-block; animation: spin .8s linear infinite; }

/* ---------------------------------------------------------------------------
   Modal overlay (setup page session modal)
   --------------------------------------------------------------------------- */
#modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,10,30,.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
    backdrop-filter: blur(2px);
}
#modal-overlay.hidden { display: none; }

/* Session modal (also used by setup.html) */
#session-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,10,30,.5);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
    backdrop-filter: blur(2px);
}
#session-modal-overlay.hidden { display: none; }

#edit-modal {
    background: var(--clr-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 580px;
    max-height: 90vh;
    overflow-y: auto;
    padding: 1.6rem;
    border-top: 3px solid var(--clr-primary);
}

#edit-modal h3,
#modal-session-title {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .04em;
    color: var(--clr-primary);
    margin-bottom: 1rem;
    padding-bottom: .65rem;
    border-bottom: 1px solid var(--clr-border-light);
}

#modal-title {
    font-family: var(--font-display);
    font-size: 1.05rem;
    font-weight: 700;
    color: var(--clr-primary);
    margin-bottom: .25rem;
}

#modal-session-info {
    font-size: .85rem;
    color: var(--clr-text-muted);
    margin-bottom: 1rem;
    padding-bottom: .75rem;
    border-bottom: 1px solid var(--clr-border);
}

#modal-session-alert { margin-bottom: .75rem; }

.modal-buttons {
    display: flex;
    justify-content: flex-end;
    gap: .6rem;
    margin-top: 1rem;
    padding-top: .75rem;
    border-top: 1px solid var(--clr-border-light);
}

.modal-error {
    background: var(--clr-danger-bg);
    color: var(--clr-danger);
    padding: .5rem .75rem;
    border-radius: var(--radius);
    font-size: .85rem;
    margin-top: .75rem;
    border-left: 3px solid var(--clr-danger);
}
.modal-error.hidden { display: none; }

/* ---------------------------------------------------------------------------
   Setup / Circuits pages
   --------------------------------------------------------------------------- */
.page-content {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1.4rem;
}

.card {
    background: var(--clr-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow);
    padding: 1.4rem;
    margin-bottom: 1.2rem;
    border: 1px solid var(--clr-border-light);
}

.card-title {
    font-family: var(--font-display);
    font-size: .88rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .06em;
    color: var(--clr-primary);
    margin-bottom: 1rem;
    padding-bottom: .55rem;
    border-bottom: 2px solid var(--clr-primary-light);
}

/* Session list in setup */
#sessions-table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    font-size: .87rem;
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

#sessions-table th {
    background: var(--clr-primary);
    color: rgba(255,255,255,.9);
    font-family: var(--font-display);
    font-weight: 700;
    font-size: .72rem;
    text-transform: uppercase;
    letter-spacing: .06em;
    padding: .45rem .55rem;
    text-align: left;
    white-space: nowrap;
}

#sessions-table td {
    padding: .45rem .55rem;
    border-bottom: 1px solid var(--clr-border-light);
    vertical-align: middle;
    background: var(--clr-white);
}

#sessions-table tr:last-child td { border-bottom: none; }
#sessions-table tr:hover td { background: var(--clr-primary-light); }

/* Inline time display */
.mono { font-family: var(--font-mono); }

/* Alert / notification boxes */
.alert {
    padding: .6rem 1rem;
    border-radius: var(--radius);
    font-size: .88rem;
    margin-bottom: .75rem;
    border-left: 3px solid transparent;
}

.alert-info    { background: var(--clr-info-bg);    color: var(--clr-info);    border-left-color: var(--clr-info); }
.alert-success { background: var(--clr-success-bg); color: var(--clr-success); border-left-color: var(--clr-success); }
.alert-danger  { background: var(--clr-danger-bg);  color: var(--clr-danger);  border-left-color: var(--clr-danger); }
.alert-warning { background: var(--clr-warning-bg); color: var(--clr-warning); border-left-color: var(--clr-warning); }

.hidden { display: none !important; }

/* ---------------------------------------------------------------------------
   Responsive adjustments
   --------------------------------------------------------------------------- */
@media (max-width: 768px) {
    html { font-size: 14px; }

    #header-bar { padding: .55rem 1rem; gap: .75rem; }
    #header-bar h1 { font-size: 1.05rem; }
    #clock { font-size: 1.15rem; }

    #status-bar, #controls-bar { padding: .4rem 1rem; }

    #timetable-wrapper { padding: .6rem .75rem; }

    .page-content { padding: .9rem; }
}

@media (max-width: 480px) {
    #timetable .col-grid { display: none; }
}