/* Calculator page */
.calc-page { min-height: 100vh; display: flex; flex-direction: column; background: var(--bg); }
.calc-content { flex: 1; max-width: none; width: 100%; padding: 20px 40px 72px; box-sizing: border-box; }

/* Topbar: tabs left, search right */
.calc-topbar {
    display: flex; align-items: stretch; gap: 12px;
    border-bottom: 1.5px solid var(--border); margin-bottom: 20px;
}
.calc-topbar .calc-filter-tabs { border-bottom: none; margin-bottom: 0; flex: 1; min-width: 0; }
.calc-topbar .calc-search-wrap { flex-shrink: 0; width: 240px; margin-bottom: 0; align-self: center; }

/* Smart Search */
.calc-search-wrap { position: relative; }
.calc-search-field {
    display: flex; align-items: center; gap: 8px;
    background: var(--surface); border: 1.5px solid var(--border);
    border-radius: 10px; padding: 0 10px; height: 36px;
    transition: border-color .18s, box-shadow .18s;
}
.calc-search-field:focus-within { border-color: var(--primary); box-shadow: 0 0 0 3px rgba(13, 148, 136,.10); }
.calc-search-field > svg { color: var(--muted); flex-shrink: 0; }
.calc-search-input { flex: 1; border: none; outline: none; background: transparent; font-size: 13px; font-family: inherit; color: var(--text); min-width: 0; }
.calc-search-input::placeholder { color: var(--muted); }
.calc-search-clear { background: none; border: none; cursor: pointer; color: var(--muted); padding: 3px; display: none; align-items: center; border-radius: 5px; transition: color .15s; flex-shrink: 0; }
.calc-search-clear:hover { color: var(--text); }
.calc-search-clear.visible { display: flex; }

/* Suggestions dropdown */
.calc-suggestions {
    position: absolute; top: calc(100% + 6px); left: 0; right: 0;
    background: var(--surface); border: 1.5px solid var(--border);
    border-radius: 14px; box-shadow: 0 14px 44px rgba(0,0,0,.12);
    z-index: 200; overflow: hidden; display: none; min-width: 280px;
}
.calc-suggestions.open { display: block; }
.calc-sug-item {
    display: flex; align-items: center; gap: 12px; padding: 10px 14px;
    cursor: pointer; transition: background .1s; text-decoration: none; color: var(--text);
}
.calc-sug-item:hover, .calc-sug-item.focused { background: var(--bg); }
.calc-sug-icon { width: 30px; height: 30px; background: rgba(13, 148, 136,.08); border-radius: 8px; display: flex; align-items: center; justify-content: center; color: var(--primary); flex-shrink: 0; }
.calc-sug-name { font-size: 13.5px; font-weight: 600; line-height: 1.2; }
.calc-sug-cat { font-size: 11px; color: var(--muted); margin-top: 1px; }
.calc-sug-divider { height: 1px; background: var(--border); margin: 0 14px; }
.calc-sug-ask { display: flex; align-items: center; gap: 10px; padding: 10px 14px; color: var(--primary); font-size: 13px; font-weight: 600; cursor: pointer; transition: background .1s; text-decoration: none; }
.calc-sug-ask:hover { background: var(--bg); }
.calc-sug-nomatch { padding: 18px 14px; text-align: center; color: var(--muted); font-size: 13px; }

/* Filter tabs */
.calc-filter-tabs { display: flex; overflow-x: auto; scrollbar-width: none; }
.calc-filter-tabs::-webkit-scrollbar { display: none; }
.calc-filter-tab {
    padding: 9px 18px 11px; font-size: 13px; font-weight: 600; color: var(--muted);
    background: none; border: none; border-bottom: 2.5px solid transparent;
    cursor: pointer; white-space: nowrap; transition: color .15s, border-color .15s;
    margin-bottom: -1.5px; font-family: inherit; flex-shrink: 0;
}
.calc-filter-tab:hover { color: var(--text); }
.calc-filter-tab.active { color: var(--primary); border-bottom-color: var(--primary); }

/* Category pills */
.calc-cat-scroll { display: flex; gap: 7px; overflow-x: auto; scrollbar-width: none; padding: 2px 2px 14px; margin-bottom: 20px; }
.calc-cat-scroll::-webkit-scrollbar { display: none; }
.calc-cat-pill {
    display: inline-flex; align-items: center; gap: 5px;
    padding: 6px 13px; font-size: 12px; font-weight: 600; border-radius: 999px;
    border: 1.5px solid var(--border); background: var(--surface); color: var(--muted);
    cursor: pointer; white-space: nowrap; transition: all .16s; font-family: inherit; flex-shrink: 0;
}
.calc-cat-pill svg { flex-shrink: 0; }
.calc-cat-pill:hover { border-color: var(--primary); color: var(--primary); background: rgba(13, 148, 136,.04); }
.calc-cat-pill.active { background: var(--primary); color: #fff; border-color: var(--primary); box-shadow: 0 3px 10px rgba(13, 148, 136,.22); }
.calc-cat-pill.active svg { color: #fff; }

/* Section header */
.calc-section-hd { display: flex; align-items: center; justify-content: space-between; margin-bottom: 13px; }
.calc-section-title { font-size: 15px; font-weight: 700; color: var(--text); display: flex; align-items: center; gap: 7px; margin: 0; }
.calc-section-title > svg { color: var(--primary); flex-shrink: 0; }
.calc-section-count { font-size: 11px; font-weight: 600; background: var(--bg); border: 1px solid var(--border); color: var(--muted); padding: 1px 7px; border-radius: 999px; }

/* Popular grid */
.calc-popular-grid { display: grid; grid-template-columns: repeat(6,1fr); gap: 10px; margin-bottom: 36px; }
.calc-pop-card {
    display: flex; flex-direction: column; align-items: center; gap: 8px;
    padding: 16px 10px 14px; background: var(--surface); border: 1.5px solid var(--border);
    border-radius: 14px; text-decoration: none; color: var(--text); text-align: center;
    transition: transform .18s, box-shadow .18s, border-color .18s;
}
.calc-pop-card:hover { transform: translateY(-3px); box-shadow: 0 8px 24px rgba(0,0,0,.08); border-color: var(--primary); }
.calc-pop-icon { width: 40px; height: 40px; background: rgba(13, 148, 136,.09); border-radius: 12px; display: flex; align-items: center; justify-content: center; color: var(--primary); flex-shrink: 0; }
.calc-pop-name { font-size: 11.5px; font-weight: 700; color: var(--text); line-height: 1.3; }
.calc-pop-cat { font-size: 10px; color: var(--muted); line-height: 1.2; margin-top: -4px; }

/* Recently used */
.calc-recent-row { display: flex; gap: 8px; overflow-x: auto; scrollbar-width: none; padding: 2px 2px 4px; margin-bottom: 32px; }
.calc-recent-row::-webkit-scrollbar { display: none; }
.calc-recent-chip {
    display: inline-flex; align-items: center; gap: 7px;
    padding: 7px 13px; background: var(--surface); border: 1.5px solid var(--border);
    border-radius: 999px; font-size: 12.5px; font-weight: 600; color: var(--text);
    text-decoration: none; white-space: nowrap; flex-shrink: 0;
    transition: border-color .15s, box-shadow .15s;
}
.calc-recent-chip svg { color: var(--primary); flex-shrink: 0; }
.calc-recent-chip:hover { border-color: var(--primary); box-shadow: 0 3px 10px rgba(13, 148, 136,.12); }

/* Card grid */
.calc-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(285px,1fr)); gap: 13px; margin-bottom: 32px; }

/* Calculator card */
.calc-card {
    position: relative; background: var(--surface); border: 1.5px solid var(--border);
    border-radius: 15px; padding: 17px 17px 15px; display: flex; flex-direction: column;
    gap: 8px; text-decoration: none; color: var(--text);
    transition: transform .18s, box-shadow .18s, border-color .18s;
}
.calc-card:hover { transform: translateY(-3px); box-shadow: 0 10px 30px rgba(0,0,0,.09); border-color: var(--primary); }
.calc-card-head { display: flex; align-items: flex-start; gap: 11px; }
.calc-card-icon { width: 36px; height: 36px; background: rgba(13, 148, 136,.08); border-radius: 10px; display: flex; align-items: center; justify-content: center; color: var(--primary); flex-shrink: 0; }
.calc-card-titles { flex: 1; min-width: 0; }
.calc-card-name { font-size: 14px; font-weight: 700; color: var(--text); line-height: 1.3; margin: 0 0 2px; }
.calc-card-cat { font-size: 10.5px; font-weight: 600; color: var(--primary); text-transform: uppercase; letter-spacing: .04em; }
.calc-card-fav {
    flex-shrink: 0; width: 28px; height: 28px; display: flex; align-items: center; justify-content: center;
    background: none; border: 1.5px solid var(--border); border-radius: 8px; cursor: pointer;
    color: var(--muted); font-size: 14px; transition: all .16s; padding: 0; margin-left: auto; z-index: 2;
}
.calc-card-fav:hover { border-color: #f59e0b; color: #f59e0b; background: rgba(245,158,11,.06); }
.calc-card-fav.is-fav { color: #f59e0b; border-color: #f59e0b; background: rgba(245,158,11,.08); }
.calc-card-desc { font-size: 12.5px; color: var(--muted); line-height: 1.5; }
.calc-card-footer { display: flex; align-items: center; gap: 5px; flex-wrap: wrap; margin-top: 2px; }
.calc-badge { font-size: 10px; font-weight: 700; padding: 2px 8px; border-radius: 999px; letter-spacing: .03em; text-transform: uppercase; }
.calc-badge-free    { color: #0d9488; background: rgba(13, 148, 136,.10); }
.calc-badge-account { color: #2563eb; background: rgba(37,99,235,.10); }
.calc-badge-paid    { color: #d97706; background: rgba(217,119,6,.10); }
.calc-card-lock { position: absolute; top: 13px; right: 13px; width: 26px; height: 26px; display: flex; align-items: center; justify-content: center; background: var(--bg); border: 1px solid var(--border); border-radius: 7px; color: var(--muted); z-index: 3; }

/* Section block */
.calc-section-block { margin-bottom: 36px; }

/* Ask AI banner */
.calc-ask-ai {
    display: flex; align-items: center; gap: 15px;
    background: linear-gradient(135deg, rgba(13, 148, 136,.07), rgba(13, 148, 136,.02));
    border: 1.5px solid rgba(13, 148, 136,.18); border-radius: 15px; padding: 17px 20px;
    margin-bottom: 32px; text-decoration: none;
    transition: box-shadow .18s, border-color .18s;
}
.calc-ask-ai:hover { box-shadow: 0 6px 20px rgba(13, 148, 136,.10); border-color: rgba(13, 148, 136,.35); }
.calc-ask-ai-icon { width: 42px; height: 42px; background: rgba(13, 148, 136,.12); border-radius: 12px; display: flex; align-items: center; justify-content: center; color: var(--primary); flex-shrink: 0; }
.calc-ask-ai-body { flex: 1; min-width: 0; }
.calc-ask-ai-title { font-size: 14px; font-weight: 700; color: var(--text); margin: 0 0 2px; }
.calc-ask-ai-sub { font-size: 12px; color: var(--muted); margin: 0; }
.calc-ask-ai-arrow { color: var(--primary); flex-shrink: 0; }

/* Empty state */
.calc-empty { text-align: center; padding: 52px 24px; color: var(--muted); display: none; }
.calc-empty.visible { display: block; }
.calc-empty svg { color: var(--muted); opacity: .35; margin-bottom: 14px; }
.calc-empty h3 { font-size: 15px; font-weight: 700; color: var(--text); margin: 0 0 6px; }
.calc-empty p { font-size: 13px; margin: 0 0 18px; }
.calc-empty-ask { display: inline-flex; align-items: center; gap: 6px; padding: 8px 17px; background: var(--primary); color: #fff; border-radius: 999px; font-size: 13px; font-weight: 600; text-decoration: none; transition: background .15s; }
.calc-empty-ask:hover { background: var(--primary-hover); }

/* Dark mode */
html[data-theme="dark"] .calc-card:hover,
html[data-theme="dark"] .calc-pop-card:hover { box-shadow: 0 10px 32px rgba(0,0,0,.30); }
html[data-theme="dark"] .calc-card-fav.is-fav { background: rgba(245,158,11,.14); }
html[data-theme="dark"] .calc-badge-free    { background: rgba(13, 148, 136,.15); }
html[data-theme="dark"] .calc-badge-account { background: rgba(37,99,235,.15); }
html[data-theme="dark"] .calc-badge-paid    { background: rgba(217,119,6,.15); }
html[data-theme="dark"] .calc-suggestions { box-shadow: 0 14px 44px rgba(0,0,0,.35); }
html[data-theme="dark"] .calc-ask-ai { background: linear-gradient(135deg, rgba(13, 148, 136,.10), rgba(13, 148, 136,.04)); }

/* Responsive */
@media (max-width: 900px) { .calc-popular-grid { grid-template-columns: repeat(3,1fr); } }
@media (max-width: 640px) {
    .calc-content { padding: 14px 16px 56px; }
    .calc-topbar { flex-wrap: wrap; gap: 0; }
    .calc-topbar .calc-search-wrap { width: 100%; order: -1; margin-bottom: 8px; }
    .calc-topbar .calc-search-wrap .calc-search-field { height: 40px; border-radius: 10px; }
    .calc-popular-grid { grid-template-columns: repeat(3,1fr); gap: 8px; }
    .calc-grid { grid-template-columns: 1fr; }
    .calc-pop-card { padding: 12px 8px 10px; }
    .calc-pop-icon { width: 34px; height: 34px; }
    .calc-pop-name { font-size: 11px; }
}
@media (max-width: 380px) { .calc-popular-grid { grid-template-columns: repeat(2,1fr); } }