:root {
    --bg-base: #f1f5f9;
    --bg-surface: #ffffff;
    --accent: #004488;
    --accent-hover: #0055aa;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --danger: #ef4444;
    --border: #e2e8f0;
    --nav-height: 70px;
}

* { box-sizing: border-box; margin: 0; padding: 0; -webkit-tap-highlight-color: transparent; }

body { background-color: var(--bg-base); color: var(--text-main); font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif; overscroll-behavior-y: none; padding-bottom: var(--nav-height); }

header { padding: 20px; background-color: var(--bg-surface); border-bottom: 1px solid var(--border); position: sticky; top: 0; z-index: 10; margin-bottom: 20px; }
.brand-header { display: flex; align-items: center; gap: 12px; margin-bottom: 15px; }
.app-logo { height: 32px; width: auto; }
h1 { font-size: 1.4rem; color: var(--text-main); }
.accent-text { color: var(--accent); font-weight: bold; }
.tab-content { display: none; padding: 0 15px 15px 15px; }
.tab-content.active { display: block; }

/* Program Manager UI */
.program-manager { display: flex; gap: 10px; align-items: center; margin-top: 15px; }
.program-manager select { flex: 1; margin-bottom: 0; padding: 10px; font-weight: bold; color: var(--accent); border: 2px solid var(--accent); border-radius: 8px; background: var(--bg-surface); }
.pm-btns { display: flex; gap: 5px; }
.pm-btns button { background: var(--bg-base); border: 1px solid var(--border); color: var(--text-main); width: 42px; height: 42px; border-radius: 6px; font-weight: bold; font-size: 1.2rem; cursor: pointer; display: flex; align-items: center; justify-content: center; transition: 0.1s ease; }
.pm-btns button:active { background: var(--border); }
.pm-btns button.danger { color: var(--danger); font-size: 1.3rem; }
.pm-btns button.danger:active { background: #fef2f2; border-color: var(--danger); }

/* Specific layout overrides for the Calc Tab to enable bottom controls */
#tab-calc { display: none; padding: 0; height: calc(100vh - var(--nav-height)); flex-direction: column; }
#tab-calc.active { display: flex; }
#calc-header { margin-bottom: 0; padding: 15px; }
#calc-scroll-area { flex: 1; overflow-y: auto; padding: 15px; background-color: var(--bg-base); scroll-behavior: smooth; }
#pcs-ded-section { margin-top: 20px; padding-top: 20px; border-top: 2px dashed var(--border); }

#floating-score-bar {
    background-color: #0f172a;
    color: #fff;
    padding: 12px 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.95rem;
    font-weight: bold;
    z-index: 20;
}

#bottom-controls {
    position: relative;
    padding: 15px;
    background-color: var(--bg-surface);
    border-top: 1px solid var(--border);
    box-shadow: 0 -2px 10px rgba(0,0,0,0.05);
    z-index: 20;
}

label { display: block; margin-bottom: 8px; font-weight: 600; color: var(--accent); font-size: 0.95rem; }
input[type="text"], input[type="date"], input[type="number"], select { width: 100%; padding: 15px; font-size: 1rem; border: 1px solid var(--border); border-radius: 8px; background-color: var(--bg-surface); color: var(--text-main); margin-bottom: 16px; }
::-webkit-calendar-picker-indicator { cursor: pointer; opacity: 0.6; }

#dro-grid { display: flex; flex-direction: column; gap: 10px; }
.dro-row { display: flex; align-items: center; gap: 10px; }
.dro-label { font-size: 0.75rem; font-weight: bold; color: var(--text-muted); width: 45px; text-transform: uppercase; }
.dro-btns { display: flex; gap: 6px; overflow-x: auto; padding-bottom: 5px; -webkit-overflow-scrolling: touch; white-space: nowrap; }
.dro-btns button { background: var(--bg-base); border: 1px solid var(--border); color: var(--text-main); font-weight: bold; padding: 8px 12px; border-radius: 6px; font-size: 0.85rem; cursor: pointer; }
.dro-btns button:active { background: var(--accent); color: white; border-color: var(--accent); }

/* Unified Element Design */
.element-card, .combo-container { background-color: var(--bg-surface); border: 1px solid var(--border); box-shadow: 0 1px 3px rgba(0,0,0,0.05); border-radius: 8px; padding: 15px; margin-bottom: 10px; display: flex; flex-direction: column; gap: 10px; border-left: 4px solid var(--accent); }
.combo-container { border-left: 4px solid var(--accent); background-color: #f8fafc; }
.element-card.invalid, .combo-container.invalid { opacity: 0.5; border-color: var(--danger); border-left-color: var(--danger); }

.card-header { display: flex; justify-content: space-between; align-items: flex-start; }
.combo-header-main { display: flex; justify-content: space-between; align-items: center; margin-bottom: 10px; border-bottom: 1px solid var(--border); padding-bottom: 8px; }

.element-id { font-weight: bold; color: var(--accent); margin-right: 8px; font-size: 1.1rem; }
.combo-title { font-weight: bold; color: var(--accent); font-size: 1.1rem; }
.element-name { display: block; font-size: 0.85rem; color: var(--text-muted); margin-top: 2px;}

.combo-actions { display: flex; gap: 5px; }
.remove-btn { background: none; border: none; color: var(--danger); font-size: 1.5rem; line-height: 1; cursor: pointer; padding: 0 5px; }
.action-icon-btn { background: none; border: none; font-size: 1.3rem; line-height: 1; cursor: pointer; padding: 0 6px; color: var(--text-muted); }
.action-icon-btn:hover { color: var(--accent); }
.action-icon-btn.danger:hover { color: var(--danger); }

/* Jump Row Sub-Cards (Used inside Combos) */
.jump-row-card { background-color: var(--bg-surface); border: 1px solid var(--border); border-radius: 6px; padding: 12px; margin-bottom: 8px; }
.jump-row-card:last-child { margin-bottom: 0; }
.jump-row-header { display: flex; justify-content: space-between; align-items: flex-start; margin-bottom: 8px; }

.builder-row { display: flex; align-items: center; gap: 8px; margin-top: 6px; flex-wrap: wrap; }
.builder-label { font-size: 0.75rem; color: var(--text-muted); font-weight: bold; text-transform: uppercase; min-width: 40px;}
.builder-group { display: flex; gap: 4px; flex-wrap: wrap; }
.toggle-btn { background: rgba(0, 0, 0, 0.03); color: var(--text-main); border: 1px solid var(--border); border-radius: 4px; padding: 6px 10px; font-size: 0.85rem; font-weight: bold; cursor: pointer; transition: all 0.2s ease; }
.toggle-btn:disabled { opacity: 0.3; cursor: not-allowed; }
.toggle-btn.active { background-color: var(--accent); color: white; border-color: var(--accent); }
.toggle-btn.danger.active { background-color: var(--danger); border-color: var(--danger); }

/* Inline Combo Search */
.combo-search-container { position: relative; margin-top: 5px; }
.combo-search-input { width: 100%; padding: 10px 12px !important; margin-bottom: 0 !important; border: 1px dashed var(--accent) !important; border-radius: 6px !important; background-color: var(--bg-surface) !important; color: var(--text-main); font-size: 0.9rem !important; outline: none; }
.combo-autocomplete-list { display: none; position: absolute; top: 100%; left: 0; right: 0; background-color: var(--bg-surface); border: 1px solid var(--accent); border-radius: 0 0 8px 8px; max-height: 200px; overflow-y: auto; z-index: 50; box-shadow: 0 4px 10px rgba(0,0,0,0.1); margin-top: 4px; }

.card-footer { display: flex; justify-content: space-between; font-size: 0.9rem; border-top: 1px solid var(--border); padding-top: 8px; }

.pcs-row { display: flex; align-items: center; justify-content: space-between; margin-bottom: 8px; }
.pcs-row label { margin-bottom: 0; color: var(--text-main); font-weight: normal; }
.pcs-row input { width: 80px; padding: 8px; margin-bottom: 0; text-align: center; }

.tool-card, .settings-card { background-color: var(--bg-surface); border: 1px solid var(--border); box-shadow: 0 1px 3px rgba(0,0,0,0.05); border-radius: 8px; padding: 20px; margin-bottom: 16px; }
.tool-card h2 { font-size: 1.2rem; margin-bottom: 15px; color: var(--text-main); }
.tool-result { margin-top: 15px; padding: 12px; background-color: var(--bg-base); border-radius: 6px; border-left: 4px solid var(--accent); font-size: 0.95rem; line-height: 1.5; }
.tool-result:empty { display: none; }

#timer-display { font-size: 3.5rem; font-weight: bold; text-align: center; color: var(--accent); margin: 15px 0; font-family: monospace; transition: color 0.3s; }
.time-over { color: var(--danger) !important; animation: blink 1s infinite; }
@keyframes blink { 50% { opacity: 0.5; } }
.timer-controls { display: flex; gap: 10px; margin-bottom: 15px; }
.action-btn { flex: 1; padding: 14px; font-size: 1rem; font-weight: bold; border-radius: 8px; border: none; background-color: var(--accent); color: white; cursor: pointer; }
.action-btn.secondary { background-color: var(--bg-base); color: var(--text-main); border: 1px solid var(--border); }
.timer-presets { display: flex; gap: 12px; justify-content: center; margin-top: 10px; }
.preset-btn { background: var(--bg-surface); color: var(--text-main); border: 2px solid var(--border); border-radius: 6px; padding: 10px 16px; font-size: 0.95rem; font-weight: bold; cursor: pointer; transition: border-color 0.2s;}

.timer-custom-row { display: flex; align-items: center; justify-content: center; gap: 10px; margin-top: 15px; }
.timer-custom-row input { width: 70px; padding: 8px; margin-bottom: 0; text-align: center; }

.dict-item { display: flex; justify-content: space-between; align-items: center; padding: 12px 0; border-bottom: 1px solid var(--border); font-size: 0.95rem; }
.dict-item:last-child { border-bottom: none; }
.dict-item-text { max-width: 80%; line-height: 1.4; }
.dict-item-text strong { color: var(--text-main); font-size: 1.05rem; }
.dict-item-text small { display: block; color: var(--text-muted); font-size: 0.85rem; margin-top: 2px; }

details { background-color: var(--bg-surface); border-radius: 8px; border: 1px solid var(--border); box-shadow: 0 1px 3px rgba(0,0,0,0.05); margin-bottom: 16px; padding: 15px; }
summary { font-size: 1.1rem; font-weight: bold; cursor: pointer; list-style: none; display: flex; justify-content: space-between; }
summary::-webkit-details-marker { display: none; }
details > p, details > a, details > div { margin-top: 12px; }
.external-link { display: block; color: var(--accent); text-decoration: none; padding: 10px 0; font-size: 1rem; border-bottom: 1px solid var(--border); }
.external-link:last-child { border-bottom: none; }

#autocomplete-list { position: absolute; bottom: 100%; left: 15px; right: 15px; background-color: var(--bg-surface); border: 1px solid var(--accent); border-radius: 8px 8px 0 0; max-height: 250px; overflow-y: auto; z-index: 50; display: none; box-shadow: 0 -4px 10px rgba(0,0,0,0.1); margin-bottom: 5px;}
.autocomplete-item { padding: 12px 15px; display: flex; justify-content: space-between; cursor: pointer; border-bottom: 1px solid var(--border); }
.autocomplete-item:hover { background-color: var(--accent-hover); color: white; }

/* Legend List Styling */
.legend-list { display: flex; flex-direction: column; gap: 10px; margin-top: 10px; }
.legend-item { display: flex; gap: 12px; align-items: flex-start; }
.legend-symbol { background-color: var(--bg-base); border: 1px solid var(--border); color: var(--accent); font-weight: bold; padding: 4px 0; width: 36px; text-align: center; border-radius: 6px; font-size: 0.85rem; flex-shrink: 0; }
.legend-desc { display: flex; flex-direction: column; }
.legend-desc strong { font-size: 0.9rem; color: var(--text-main); }
.legend-desc span { font-size: 0.8rem; color: var(--text-muted); line-height: 1.3; margin-top: 2px; }

#bottom-nav { position: fixed; bottom: 0; left: 0; width: 100%; height: var(--nav-height); background-color: var(--bg-surface); display: flex; border-top: 1px solid var(--border); z-index: 100; }
.nav-btn { flex: 1; background: none; border: none; color: var(--text-muted); font-size: 0.8rem; font-weight: bold; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 4px; cursor: pointer; transition: color 0.2s; }
.nav-btn svg { width: 24px; height: 24px; stroke: currentColor; }
.nav-btn.active { color: var(--accent); }

.region-badge { background-color: #e0f2fe; color: #0369a1; font-size: 0.7rem; font-weight: 700; padding: 2px 6px; border-radius: 4px; margin-left: 6px; text-transform: uppercase; display: inline-block; vertical-align: middle; }

/* Modal Styles */
.modal-overlay { display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(15, 23, 42, 0.6); z-index: 200; align-items: center; justify-content: center; backdrop-filter: blur(2px); padding: 15px; }
.modal-overlay.active { display: flex; animation: fadeIn 0.2s ease; }
.modal-content { background: var(--bg-surface); width: 100%; max-width: 500px; border-radius: 12px; box-shadow: 0 10px 25px rgba(0,0,0,0.1); display: flex; flex-direction: column; max-height: 90vh; }
.modal-header { padding: 15px 20px; border-bottom: 1px solid var(--border); display: flex; justify-content: space-between; align-items: center; }
.modal-header h2 { font-size: 1.2rem; margin: 0; }
.close-btn { background: none; border: none; font-size: 1.5rem; color: var(--text-muted); cursor: pointer; padding: 0 5px; }
.modal-body { padding: 20px; overflow-y: auto; }
.modal-footer { padding: 15px 20px; border-top: 1px solid var(--border); }
@keyframes fadeIn { from { opacity: 0; transform: translateY(10px); } to { opacity: 1; transform: translateY(0); } }