/* ==========================================================================
   صفحه ابزارهای محاسباتی فنی — /technical/calculators
   نمای فهرست ابزارها + نمای تمرکز روی یک ابزار
   ========================================================================== */

.calc-page {
    background: var(--app-bg);
    min-height: 60vh;
    padding-bottom: 3rem;
}

/* ---------- Hero ---------- */
.calc-hero {
    position: relative;
    overflow: hidden;
    padding: 2.4rem 0 3.4rem;
    background: linear-gradient(135deg, #1e3a8a 0%, #2563eb 55%, #0ea5e9 100%);
    color: #fff;
}

.calc-hero::before {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle at 15% 20%, rgba(255, 255, 255, 0.16), transparent 45%),
        radial-gradient(circle at 85% 80%, rgba(14, 165, 233, 0.35), transparent 50%);
    pointer-events: none;
}

.calc-hero__inner {
    position: relative;
    z-index: 1;
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 1rem;
}

.calc-hero h1 {
    margin: 0 0 0.6rem;
    font-size: clamp(1.55rem, 3.6vw, 2.35rem);
    font-weight: 800;
    color: #fff;
    line-height: 1.4;
}

.calc-hero p {
    margin: 0;
    max-width: 64ch;
    color: rgba(255, 255, 255, 0.86);
    line-height: 1.9;
    font-size: 0.98rem;
}

.calc-hero__stats {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1.15rem;
}

.calc-hero__stat {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.35rem 0.85rem;
    border-radius: 999px;
    background: rgba(255, 255, 255, 0.13);
    border: 1px solid rgba(255, 255, 255, 0.22);
    font-size: 0.82rem;
    white-space: nowrap;
}

.calc-hero--compact {
    padding: 1.5rem 0 1.7rem;
}

.calc-hero--compact h1 {
    margin-bottom: 0.25rem;
    font-size: clamp(1.3rem, 2.8vw, 1.8rem);
}

.calc-hero--compact p,
.calc-hero--compact .calc-hero__stats {
    display: none;
}

/* ---------- Toolbar (search + chips) ---------- */
.calc-toolbar {
    position: relative;
    z-index: 2;
    margin-top: -2rem;
    padding: 1rem;
    border-radius: 1.15rem;
    background: var(--app-surface);
    border: 1px solid var(--app-border);
    box-shadow: 0 18px 40px -28px var(--app-shadow-xl);
    scroll-margin-top: 90px;
}

.calc-search {
    position: relative;
}

.calc-search input {
    width: 100%;
    padding: 0.7rem 2.6rem 0.7rem 1rem;
    border-radius: 0.8rem;
    border: 1px solid var(--app-input-border);
    background: var(--app-input-bg);
    color: var(--app-text);
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.calc-search input:focus {
    border-color: var(--app-primary);
    box-shadow: 0 0 0 3px var(--app-input-focus);
}

.calc-search input::placeholder {
    color: var(--app-placeholder);
}

.calc-search__icon {
    position: absolute;
    top: 50%;
    right: 0.95rem;
    transform: translateY(-50%);
    color: var(--app-text-muted);
    pointer-events: none;
}

.calc-chips {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.45rem;
    margin-top: 0.75rem;
}

.calc-chip {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.35rem 0.85rem;
    border-radius: 999px;
    border: 1px solid var(--app-border);
    background: var(--app-bg);
    color: var(--app-text-secondary);
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
}

.calc-chip:hover {
    border-color: var(--calc-accent, var(--app-primary));
    color: var(--calc-accent, var(--app-primary));
}

.calc-chip.is-active {
    background: var(--calc-accent, var(--app-primary));
    border-color: var(--calc-accent, var(--app-primary));
    color: #fff;
}

.calc-toolbar__hint {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    margin: 0.7rem 0 0;
    font-size: 0.78rem;
    color: var(--app-text-muted);
}

/* ---------- Quick start strip ---------- */
.calc-start {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.6rem;
    margin-top: 1rem;
    padding: 0.7rem 0.9rem;
    border-radius: 0.9rem;
    background: var(--app-surface);
    border: 1px dashed var(--app-border-strong);
}

.calc-start__label {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.78rem;
    font-weight: 800;
    color: var(--app-primary);
}

.calc-start__list {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.calc-quick {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.3rem 0.8rem;
    border-radius: 999px;
    border: 1px solid var(--app-border);
    background: var(--app-bg);
    color: var(--app-text-secondary);
    font-size: 0.78rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.15s ease;
}

.calc-quick:hover {
    border-color: var(--app-primary);
    background: var(--app-primary-light);
    color: var(--app-primary);
}

/* ---------- Sections ---------- */
.calc-section {
    margin-top: 2.2rem;
    scroll-margin-top: 90px;
}

.calc-section__head {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1rem;
}

.calc-section__icon {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border-radius: 0.8rem;
    background: var(--calc-accent-soft, var(--app-primary-light));
    color: var(--calc-accent-ink, var(--calc-accent, var(--app-primary)));
    font-size: 1.15rem;
    flex: 0 0 auto;
}

.calc-section__titles {
    min-width: 0;
}

.calc-section__title {
    margin: 0;
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--app-text);
}

.calc-section__sub {
    margin: 0.1rem 0 0;
    font-size: 0.82rem;
    color: var(--app-text-muted);
}

.calc-section__count {
    margin-inline-start: auto;
    padding: 0.2rem 0.65rem;
    border-radius: 999px;
    background: var(--app-bg);
    border: 1px solid var(--app-border);
    color: var(--app-text-muted);
    font-size: 0.72rem;
    font-weight: 600;
    white-space: nowrap;
}

/* ---------- Tool tiles ---------- */
.calc-tiles {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(255px, 1fr));
    gap: 0.85rem;
}

.ct-tile {
    position: relative;
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    padding: 1rem;
    border-radius: 1rem;
    background:
        linear-gradient(135deg, var(--calc-accent-soft, transparent) 0%, transparent 62%),
        var(--app-surface);
    border: 1px solid var(--app-border);
    text-decoration: none;
    color: inherit;
    overflow: hidden;
    transition: transform 0.16s ease, border-color 0.16s ease, box-shadow 0.16s ease;
}

/* نوار باریک رنگی دسته در لبه کاشی تا گروه‌بندی از دور هم مشخص باشد */
.ct-tile::before {
    content: "";
    position: absolute;
    inset-block: 0;
    inset-inline-start: 0;
    width: 3px;
    background: var(--calc-accent, var(--app-primary));
    opacity: 0.65;
    transition: opacity 0.16s ease, width 0.16s ease;
}

.ct-tile:hover::before {
    opacity: 1;
    width: 4px;
}

.ct-tile:hover {
    border-color: var(--calc-accent-border, var(--app-primary));
    transform: translateY(-2px);
    box-shadow: 0 18px 32px -28px var(--app-shadow-xl);
}

.ct-tile:focus-visible {
    outline: 0;
    border-color: var(--calc-accent, var(--app-primary));
    box-shadow: 0 0 0 3px var(--app-input-focus);
}

.ct-tile__icon {
    display: grid;
    place-items: center;
    width: 42px;
    height: 42px;
    border-radius: 0.8rem;
    background: var(--calc-accent-soft, var(--app-primary-light));
    color: var(--calc-accent-ink, var(--calc-accent, var(--app-primary)));
    font-size: 1.1rem;
    flex: 0 0 auto;
}

.ct-tile__body {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    min-width: 0;
    flex: 1 1 auto;
}

.ct-tile__title {
    font-size: 0.92rem;
    font-weight: 800;
    color: var(--app-text);
}

.ct-tile__desc {
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
    font-size: 0.76rem;
    line-height: 1.7;
    color: var(--app-text-muted);
}

.ct-tile__go {
    align-self: center;
    margin-inline-start: auto;
    flex: 0 0 auto;
    font-size: 0.8rem;
    color: var(--app-text-muted);
    transition: transform 0.16s ease, color 0.16s ease;
}

.ct-tile:hover .ct-tile__go {
    color: var(--calc-accent, var(--app-primary));
    transform: translateX(-3px);
}

/* ---------- Category accents ---------- */
.calc-section[data-cat="components"],
.calc-chip[data-cat="components"],
.calc-focus.calc-tone-components {
    --calc-accent: #4f46e5;
    --calc-accent-2: #7c3aed;
    --calc-accent-dark: #312e81;
    --calc-accent-ink: #4f46e5;
    --calc-accent-soft: rgba(79, 70, 229, 0.12);
    --calc-accent-border: rgba(79, 70, 229, 0.3);
    --calc-accent-ring: rgba(79, 70, 229, 0.16);
}

.calc-section[data-cat="power"],
.calc-chip[data-cat="power"],
.calc-focus.calc-tone-power {
    --calc-accent: #ea580c;
    --calc-accent-2: #f59e0b;
    --calc-accent-dark: #7c2d12;
    --calc-accent-ink: #c2410c;
    --calc-accent-soft: rgba(234, 88, 12, 0.12);
    --calc-accent-border: rgba(234, 88, 12, 0.32);
    --calc-accent-ring: rgba(234, 88, 12, 0.16);
}

.calc-section[data-cat="motors"],
.calc-chip[data-cat="motors"],
.calc-focus.calc-tone-motors {
    --calc-accent: #0d9488;
    --calc-accent-2: #10b981;
    --calc-accent-dark: #064e3b;
    --calc-accent-ink: #0f766e;
    --calc-accent-soft: rgba(13, 148, 136, 0.12);
    --calc-accent-border: rgba(13, 148, 136, 0.32);
    --calc-accent-ring: rgba(13, 148, 136, 0.16);
}

/* ---------- Focus workspace ---------- */
.calc-workspace {
    display: grid;
    grid-template-columns: 252px minmax(0, 1fr);
    gap: 1.35rem;
    align-items: start;
    margin-top: 1.4rem;
    padding-bottom: 1rem;
}

.calc-side {
    position: sticky;
    top: 84px;
    max-height: calc(100vh - 100px);
    overflow-y: auto;
    padding: 0.9rem 0.6rem;
    border-radius: 1.05rem;
    background: var(--app-surface);
    border: 1px solid var(--app-border);
    box-shadow: 0 14px 30px -26px var(--app-shadow-xl);
    scrollbar-width: thin;
}

.calc-side__title {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin: 0 0 0.35rem;
    padding: 0 0.5rem 0.55rem;
    font-size: 0.85rem;
    font-weight: 800;
    color: var(--app-text);
}

.calc-side__count {
    padding: 0.1rem 0.5rem;
    border-radius: 999px;
    background: var(--app-primary-light);
    color: var(--app-primary);
    font-size: 0.7rem;
    font-weight: 700;
}

.calc-side__group {
    padding-top: 0.55rem;
    border-top: 1px dashed var(--app-divider);
}

.calc-side__group:first-of-type {
    border-top: 0;
    padding-top: 0;
}

.calc-side__label {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    margin: 0 0 0.3rem;
    padding: 0 0.5rem;
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--app-text-muted);
}

.calc-side__link {
    display: block;
    padding: 0.38rem 0.55rem;
    border-radius: 0.55rem;
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--app-text-secondary);
    text-decoration: none;
    transition: background 0.15s ease, color 0.15s ease;
}

.calc-side__link:hover {
    background: var(--app-bg);
    color: var(--app-primary);
}

.calc-side__link.is-active {
    background: var(--app-primary-light);
    color: var(--app-primary);
    font-weight: 800;
}

.calc-stage {
    min-width: 0;
    scroll-margin-top: 88px;
}

.calc-stage__bar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.6rem;
    margin-bottom: 0.85rem;
}

.calc-crumbs {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.78rem;
    color: var(--app-text-muted);
}

.calc-crumbs a {
    color: var(--app-text-muted);
    text-decoration: none;
}

.calc-crumbs a:hover {
    color: var(--app-primary);
}

.calc-crumbs__current {
    color: var(--app-text);
    font-weight: 700;
}

.calc-back {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.38rem 0.85rem;
    border-radius: 999px;
    border: 1px solid var(--app-border);
    background: var(--app-surface);
    color: var(--app-text-secondary);
    font-size: 0.8rem;
    font-weight: 700;
    text-decoration: none;
    transition: all 0.15s ease;
}

.calc-back:hover {
    border-color: var(--app-primary);
    color: var(--app-primary);
}

.calc-stage__actions {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.45rem;
}

.calc-fav {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.38rem 0.85rem;
    border-radius: 999px;
    border: 1px solid var(--app-border);
    background: var(--app-surface);
    color: var(--app-text-secondary);
    font-size: 0.8rem;
    font-weight: 700;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.15s ease;
}

.calc-fav:hover {
    border-color: #f59e0b;
    color: #b45309;
}

.calc-fav.is-active {
    border-color: #fcd34d;
    background: #fffbeb;
    color: #b45309;
}

.calc-start--mine {
    border-style: solid;
    background: var(--app-card-bg, var(--app-surface));
}

.calc-mobile-switch {
    display: none;
    margin-bottom: 0.85rem;
}

.calc-mobile-switch .calc-select {
    margin-top: 0.3rem;
}

/* ---------- Pager ---------- */
.calc-pager {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.7rem;
    margin-top: 1rem;
}

.calc-pager__item {
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    min-width: 0;
    padding: 0.7rem 0.9rem;
    border-radius: 0.85rem;
    border: 1px solid var(--app-border);
    background: var(--app-surface);
    text-decoration: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.calc-pager__item--next {
    align-items: flex-end;
    text-align: left;
}

.calc-pager__item--empty {
    border-color: transparent;
    background: transparent;
}

a.calc-pager__item:hover {
    border-color: var(--app-primary);
    box-shadow: 0 14px 26px -24px var(--app-shadow-xl);
}

.calc-pager__dir {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    font-size: 0.72rem;
    font-weight: 600;
    color: var(--app-text-muted);
}

.calc-pager__title {
    font-size: 0.85rem;
    font-weight: 800;
    color: var(--app-text);
}

a.calc-pager__item:hover .calc-pager__title {
    color: var(--app-primary);
}

/* ---------- Tool card (shell) ---------- */
.calc-card {
    display: flex;
    flex-direction: column;
    min-width: 0;
    border-radius: 1.05rem;
    background: var(--app-surface);
    border: 1px solid var(--app-border);
    box-shadow: 0 12px 30px -26px var(--app-shadow-xl);
    scroll-margin-top: 84px;
    overflow: hidden;
}

.calc-card__head {
    display: flex;
    align-items: flex-start;
    gap: 0.7rem;
    padding: 1rem 1rem 0.55rem;
}

.calc-card__icon {
    display: grid;
    place-items: center;
    width: 40px;
    height: 40px;
    border-radius: 0.75rem;
    background: var(--app-primary-light);
    color: var(--app-primary);
    font-size: 1.1rem;
    flex: 0 0 auto;
}

.calc-card__titles {
    min-width: 0;
}

.calc-card__title {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.4rem;
    margin: 0;
    font-size: 1rem;
    font-weight: 800;
    color: var(--app-text);
}

.calc-card__chips {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.35rem;
    margin-top: 0.45rem;
}

.calc-card__chip {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.16rem 0.6rem;
    border-radius: 999px;
    background: var(--app-bg);
    border: 1px solid var(--app-border);
    color: var(--app-text-muted);
    font-size: 0.68rem;
    font-weight: 700;
    white-space: nowrap;
}

.calc-card__chip .oi {
    font-size: 0.7rem;
}

.calc-card__chip--tag {
    background: var(--calc-accent-soft, var(--app-primary-light));
    border-color: var(--calc-accent-border, transparent);
    color: var(--calc-accent-ink, var(--calc-accent, var(--app-primary)));
}

.calc-card__sub {
    margin: 0.2rem 0 0;
    font-size: 0.78rem;
    line-height: 1.75;
    color: var(--app-text-muted);
}

.calc-card__body {
    padding: 0.35rem 1rem 0.9rem;
    flex: 1 1 auto;
}

.calc-card__foot {
    display: flex;
    gap: 0.45rem;
    padding: 0.65rem 1rem;
    border-top: 1px solid var(--app-divider);
    background: var(--app-bg);
}

/* Focus mode: یک ابزار، اندازه کامل */
.calc-focus .calc-card {
    max-width: 940px;
    margin-inline: auto;
    border-radius: 1.25rem;
    box-shadow: 0 30px 60px -50px var(--app-shadow-xl);
}

.calc-focus .calc-card__head {
    align-items: center;
    gap: 0.9rem;
    padding: 1.35rem 1.5rem 1.1rem;
    background: linear-gradient(135deg, var(--calc-accent-soft, var(--app-primary-light)), transparent 75%);
    border-bottom: 1px solid var(--app-divider);
}

.calc-focus .calc-card__icon {
    width: 50px;
    height: 50px;
    border-radius: 0.95rem;
    background: linear-gradient(135deg, var(--calc-accent, var(--app-primary)), var(--calc-accent-2, #0ea5e9));
    color: #fff;
    font-size: 1.35rem;
}

.calc-focus .calc-card__title {
    font-size: 1.25rem;
}

.calc-focus .calc-card__sub {
    margin-top: 0.25rem;
    font-size: 0.85rem;
}

.calc-focus .calc-card__body {
    padding: 1.25rem 1.5rem 1.5rem;
}

.calc-focus .calc-card__foot {
    padding: 0.8rem 1.5rem;
}

.calc-focus .calc-form {
    gap: 0.9rem 1rem;
    max-width: 720px;
}

.calc-focus .calc-label {
    font-size: 0.8rem;
}

.calc-focus .calc-input,
.calc-focus .calc-select {
    padding: 0.62rem 0.75rem;
    border-radius: 0.7rem;
    font-size: 0.95rem;
}

.calc-focus .calc-seg__btn {
    padding: 0.4rem 1rem;
    font-size: 0.84rem;
}

.calc-focus .calc-result {
    margin-top: 1.15rem;
    padding: 1rem;
    border-radius: 0.95rem;
}

.calc-focus .calc-result__grid {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.6rem;
}

.calc-focus .calc-result__item {
    padding: 0.6rem 0.75rem;
}

.calc-focus .calc-result__value {
    font-size: 1.35rem;
}

.calc-focus .calc-result__value--sm {
    font-size: 1rem;
}

.calc-focus .calc-details > summary {
    font-size: 0.85rem;
}

.calc-mini-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.32rem 0.75rem;
    border-radius: 0.6rem;
    border: 1px solid var(--app-border-strong);
    background: var(--app-surface);
    color: var(--app-text-secondary);
    font-size: 0.76rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.15s ease;
}

.calc-mini-btn:hover:not(:disabled) {
    border-color: var(--app-primary);
    color: var(--app-primary);
}

.calc-mini-btn:disabled {
    opacity: 0.5;
    cursor: default;
}

.calc-mini-btn--ghost {
    background: transparent;
    border-color: transparent;
    color: var(--app-text-muted);
}

/* ---------- Form controls ---------- */
.calc-form {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.65rem 0.75rem;
}

.calc-field {
    display: flex;
    flex-direction: column;
    gap: 0.28rem;
    min-width: 0;
}

.calc-field--full {
    grid-column: 1 / -1;
}

.calc-field--hint {
    grid-column: 1 / -1;
}

.calc-label {
    font-size: 0.76rem;
    font-weight: 600;
    color: var(--app-text-muted);
}

.calc-input,
.calc-select {
    width: 100%;
    padding: 0.52rem 0.65rem;
    border-radius: 0.6rem;
    border: 1px solid var(--app-input-border);
    background: var(--app-input-bg);
    color: var(--app-text);
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
}

.calc-input:focus,
.calc-select:focus {
    border-color: var(--app-primary);
    box-shadow: 0 0 0 3px var(--app-input-focus);
}

.calc-input::placeholder {
    color: var(--app-placeholder);
}

.calc-input-group {
    display: flex;
    gap: 0.35rem;
}

.calc-select--unit {
    width: 4.9rem;
    flex: 0 0 auto;
}

.calc-seg {
    display: inline-flex;
    padding: 0.18rem;
    gap: 0.15rem;
    margin-bottom: 0.8rem;
    border-radius: 0.65rem;
    background: var(--app-bg);
    border: 1px solid var(--app-border);
}

.calc-seg__btn {
    border: 0;
    background: transparent;
    color: var(--app-text-muted);
    font-size: 0.78rem;
    font-weight: 700;
    padding: 0.32rem 0.8rem;
    border-radius: 0.5rem;
    cursor: pointer;
    transition: all 0.15s ease;
}

.calc-seg__btn.is-active {
    background: var(--app-surface);
    color: var(--app-primary);
    box-shadow: 0 2px 8px -4px var(--app-shadow-lg);
}

/* ---------- Results ---------- */
.calc-result {
    margin-top: 0.9rem;
    padding: 0.8rem;
    border-radius: 0.8rem;
    border: 1px solid var(--app-border);
    background: linear-gradient(180deg, var(--app-primary-light), transparent 130%);
}

.calc-result__grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem;
}

.calc-result__item {
    display: flex;
    flex-direction: column;
    gap: 0.12rem;
    padding: 0.45rem 0.6rem;
    border-radius: 0.6rem;
    background: var(--app-surface);
    border: 1px solid var(--app-border);
    min-width: 0;
}

.calc-result__item--wide {
    grid-column: 1 / -1;
}

.calc-result__item.is-solved {
    border-color: rgba(16, 185, 129, 0.45);
    background: var(--app-success-bg);
}

.calc-result__label {
    font-size: 0.7rem;
    color: var(--app-text-muted);
}

.calc-result__value {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--app-primary);
    direction: ltr;
    text-align: right;
    line-height: 1.35;
    word-break: break-word;
}

.calc-result__value small {
    font-size: 0.72em;
    font-weight: 600;
    color: var(--app-text-muted);
}

.calc-result__value--sm {
    font-size: 0.9rem;
    color: var(--app-text-secondary);
}

.calc-note {
    font-size: 0.76rem;
    line-height: 1.8;
    color: var(--app-text-muted);
}

.calc-error,
.calc-hint {
    display: flex;
    align-items: flex-start;
    gap: 0.35rem;
    margin-top: 0.8rem;
    padding: 0.55rem 0.75rem;
    border-radius: 0.6rem;
    font-size: 0.8rem;
    line-height: 1.75;
}

.calc-error {
    background: var(--app-danger-bg);
    color: var(--app-danger);
}

.calc-hint {
    background: var(--app-info-bg);
    color: var(--app-info);
}

.calc-note[data-tone="warn"] {
    color: var(--app-warning);
}

/* ---------- Details / tables ---------- */
.calc-details {
    margin-top: 0.9rem;
    padding-top: 0.7rem;
    border-top: 1px dashed var(--app-border);
}

.calc-details > summary {
    cursor: pointer;
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--app-primary);
    list-style: none;
    display: flex;
    align-items: center;
    gap: 0.3rem;
}

.calc-details > summary::-webkit-details-marker {
    display: none;
}

.calc-details > summary::before {
    content: "+";
    display: inline-grid;
    place-items: center;
    width: 1.1rem;
    height: 1.1rem;
    border-radius: 0.35rem;
    background: var(--app-primary-light);
    color: var(--app-primary);
    font-weight: 800;
    line-height: 1;
}

.calc-details[open] > summary::before {
    content: "−";
}

.calc-details__body {
    margin-top: 0.7rem;
}

.calc-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.78rem;
    color: var(--app-text-secondary);
}

.calc-table th,
.calc-table td {
    padding: 0.4rem 0.5rem;
    border-bottom: 1px solid var(--app-divider);
    text-align: right;
}

.calc-table th {
    color: var(--app-text-muted);
    font-weight: 700;
    font-size: 0.74rem;
}

.calc-table tr:last-child td {
    border-bottom: 0;
}

.calc-table tr.is-recommended td {
    background: var(--app-primary-light);
    color: var(--app-primary);
    font-weight: 700;
}

/* ---------- Resistor preview ---------- */
.resistor-preview {
    display: grid;
    place-items: center;
    min-height: 74px;
    margin: 0.2rem 0 0.9rem;
    padding: 0.8rem;
    border-radius: 0.8rem;
    background: var(--app-bg);
    overflow: hidden;
}

.resistor-body {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 17px;
    width: min(250px, 88%);
    height: 36px;
    border-radius: 18px;
    background: linear-gradient(180deg, #f0d3a4, #dcb986 55%, #c9a066);
    box-shadow: inset 0 0 10px rgba(0, 0, 0, 0.22);
}

.band {
    width: 10px;
    height: 100%;
    border-radius: 2px;
    box-shadow: 0 0 0 1px rgba(0, 0, 0, 0.12);
}

/* ---------- FAQ / guide ---------- */
.calc-guide {
    margin-top: 3rem;
}

.calc-guide__title {
    font-size: 1.15rem;
    font-weight: 800;
    color: var(--app-text);
    margin: 0 0 1rem;
}

.calc-faq__item {
    margin-bottom: 0.55rem;
    padding: 0.8rem 1rem;
    border-radius: 0.8rem;
    background: var(--app-surface);
    border: 1px solid var(--app-border);
}

.calc-faq__item > summary {
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--app-text);
    list-style: none;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
}

.calc-faq__item > summary::-webkit-details-marker {
    display: none;
}

.calc-faq__item > summary::after {
    content: "\2304";
    color: var(--app-text-muted);
    font-size: 0.8rem;
    transition: transform 0.2s ease;
}

.calc-faq__item[open] > summary::after {
    transform: rotate(180deg);
}

.calc-faq__answer {
    margin: 0.55rem 0 0;
    font-size: 0.84rem;
    line-height: 1.9;
    color: var(--app-text-muted);
}

.calc-cta {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 0.9rem;
    margin-top: 2.2rem;
    padding: 1.1rem 1.25rem;
    border-radius: 1rem;
    background: var(--app-surface);
    border: 1px solid var(--app-border);
}

.calc-cta h3 {
    margin: 0 0 0.2rem;
    font-size: 1rem;
    font-weight: 800;
    color: var(--app-text);
}

.calc-cta p {
    margin: 0;
    font-size: 0.82rem;
    color: var(--app-text-muted);
}

.calc-cta__actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.calc-empty {
    margin-top: 1.5rem;
    padding: 2.5rem 1rem;
    text-align: center;
    border-radius: 1rem;
    border: 1px dashed var(--app-border-strong);
    color: var(--app-text-muted);
}

.calc-empty span.oi {
    display: block;
    font-size: 2rem;
    margin-bottom: 0.5rem;
    color: var(--app-text-muted);
}

/* ==========================================================================
   نمای تمرکز: تفکیک بصری ورودی‌ها از نتیجه
   ========================================================================== */

/* --- پنل ورودی‌ها --- */
.calc-focus .calc-card__body > .calc-form {
    max-width: none;
    gap: 0.85rem 0.9rem;
    padding: 0.95rem 1rem 1.05rem;
    border-radius: 0.95rem;
    background: var(--app-bg);
    border: 1px solid var(--calc-accent-border, var(--app-border));
}

.calc-focus .calc-card__body > .calc-form::before {
    content: "ورودی‌های محاسبه";
    grid-column: 1 / -1;
    margin-bottom: 0.15rem;
    padding-bottom: 0.55rem;
    border-bottom: 1px dashed var(--app-divider);
    font-size: 0.76rem;
    font-weight: 800;
    color: var(--app-text-secondary);
}

.calc-focus .calc-label {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    font-size: 0.78rem;
    font-weight: 700;
    color: var(--app-text-secondary);
}

.calc-focus .calc-label::before {
    content: "";
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--calc-accent, var(--app-primary));
    box-shadow: 0 0 0 3px var(--calc-accent-ring, rgba(37, 99, 235, 0.13));
    flex: 0 0 auto;
}

.calc-focus .calc-input,
.calc-focus .calc-select {
    padding: 0.62rem 0.75rem;
    border-radius: 0.7rem;
    border: 1px solid var(--app-input-border);
    background: var(--app-surface);
    color: var(--app-text);
    font-size: 0.98rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    box-shadow: 0 1px 2px rgba(15, 23, 42, 0.05);
}

.calc-focus .calc-input::placeholder {
    font-weight: 400;
}

.calc-focus .calc-input:focus,
.calc-focus .calc-select:focus {
    border-color: var(--calc-accent, var(--app-primary));
    box-shadow: 0 0 0 3px var(--calc-accent-ring, var(--app-input-focus));
}

.calc-focus .calc-input-group {
    gap: 0.4rem;
}

.calc-focus .calc-select--unit {
    width: auto;
    min-width: 4.2rem;
    background: var(--calc-accent-soft, var(--app-primary-light));
    border-color: var(--calc-accent-border, transparent);
    color: var(--calc-accent-ink, var(--calc-accent, var(--app-primary)));
    font-weight: 800;
    text-align: center;
    box-shadow: none;
}

.calc-focus .calc-seg {
    padding: 0.22rem;
    border-radius: 999px;
    background: var(--app-bg);
    border: 1px solid var(--app-border);
    gap: 0.2rem;
}

.calc-focus .calc-seg__btn {
    padding: 0.38rem 1.05rem;
    border-radius: 999px;
}

.calc-focus .calc-seg__btn.is-active {
    background: var(--calc-accent, var(--app-primary));
    color: #fff;
    box-shadow: 0 6px 14px -8px var(--calc-accent, rgba(37, 99, 235, 0.9));
}

/* --- پنل نتیجه --- */
.calc-focus .calc-result {
    margin-top: 1.15rem;
    padding: 1rem 1.05rem 1.05rem;
    border: 0;
    border-radius: 1rem;
    background:
        radial-gradient(circle at 84% 8%, rgba(255, 255, 255, 0.18), transparent 55%),
        linear-gradient(135deg, var(--calc-accent-dark, #0b2f6b) 0%, var(--calc-accent, #1d4ed8) 100%);
    box-shadow: 0 20px 40px -32px var(--calc-accent, rgba(29, 78, 216, 0.85));
    color: #fff;
}

.calc-focus .calc-result::before {
    content: "نتیجه محاسبه";
    display: block;
    margin-bottom: 0.7rem;
    padding-bottom: 0.55rem;
    border-bottom: 1px solid rgba(255, 255, 255, 0.16);
    font-size: 0.76rem;
    font-weight: 800;
    color: rgba(255, 255, 255, 0.82);
}

.calc-focus .calc-result__grid {
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 0.5rem;
}

.calc-focus .calc-result__item {
    padding: 0.6rem 0.7rem;
    border-radius: 0.7rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.14);
}

.calc-focus .calc-result__item.is-solved {
    background: rgba(255, 255, 255, 0.24);
    border-color: rgba(255, 255, 255, 0.5);
}

.calc-focus .calc-result__label {
    font-size: 0.72rem;
    color: rgba(255, 255, 255, 0.72);
}

.calc-focus .calc-result__item.is-solved .calc-result__label::after {
    content: "محاسبه‌شده";
    margin-inline-start: 0.4rem;
    padding: 0.02rem 0.42rem;
    border-radius: 999px;
    background: rgba(52, 211, 153, 0.22);
    color: #a7f3d0;
    font-size: 0.62rem;
    font-weight: 700;
}

.calc-focus .calc-result__value {
    font-size: 1.55rem;
    color: #fff;
    line-height: 1.3;
}

.calc-focus .calc-result__value small {
    color: rgba(255, 255, 255, 0.68);
}

.calc-focus .calc-result__value--sm {
    font-size: 1.02rem;
    color: rgba(255, 255, 255, 0.92);
}

.calc-focus .calc-result .calc-note {
    color: rgba(255, 255, 255, 0.74);
}

/* --- پیام‌های راهنما و خطا --- */
.calc-focus .calc-hint,
.calc-focus .calc-error {
    margin-top: 1.1rem;
    padding: 0.7rem 0.85rem;
    border-radius: 0.8rem;
    border: 1px solid transparent;
    font-size: 0.82rem;
}

.calc-focus .calc-hint {
    border-color: var(--calc-accent-border, rgba(37, 99, 235, 0.18));
}

.calc-focus .calc-error {
    border-color: rgba(220, 38, 38, 0.2);
}

/* --- اکشن‌های پایین کارت --- */
.calc-focus .calc-mini-btn:not(.calc-mini-btn--ghost) {
    padding: 0.4rem 0.9rem;
    background: var(--calc-accent-soft, var(--app-primary-light));
    border-color: var(--calc-accent-border, transparent);
    color: var(--calc-accent-ink, var(--calc-accent, var(--app-primary)));
    font-weight: 700;
}

.calc-focus .calc-details {
    margin-top: 1.15rem;
}

/* ---------- Responsive ---------- */
@media (max-width: 991.98px) {
    .calc-workspace {
        grid-template-columns: minmax(0, 1fr);
        gap: 0.9rem;
        margin-top: 1.1rem;
    }

    .calc-side {
        display: none;
    }

    .calc-mobile-switch {
        display: block;
    }

    .calc-stage__bar {
        margin-bottom: 0.7rem;
    }
}

@media (max-width: 575.98px) {
    .calc-hero {
        padding: 1.8rem 0 3rem;
    }

    .calc-hero--compact {
        padding: 1.3rem 0 1.4rem;
    }

    .calc-toolbar {
        margin-top: -1.6rem;
        padding: 0.8rem;
    }

    .calc-start {
        flex-direction: column;
        align-items: flex-start;
    }

    .calc-tiles {
        grid-template-columns: 1fr;
    }

    .calc-form {
        grid-template-columns: 1fr;
    }

    .calc-result__grid {
        grid-template-columns: 1fr 1fr;
    }

    .calc-input,
    .calc-select {
        font-size: 1rem;
    }

    .calc-focus .calc-card__head {
        padding: 1.1rem 1rem 0.85rem;
    }

    .calc-focus .calc-card__icon {
        width: 44px;
        height: 44px;
        font-size: 1.15rem;
    }

    .calc-focus .calc-card__title {
        font-size: 1.1rem;
    }

    .calc-focus .calc-card__body {
        padding: 1rem 1rem 1.15rem;
    }

    .calc-focus .calc-card__foot {
        padding: 0.7rem 1rem;
    }

    .calc-focus .calc-result__value {
        font-size: 1.2rem;
    }

    .calc-pager {
        grid-template-columns: 1fr;
    }

    .calc-pager__item--empty {
        display: none;
    }

    .calc-card__foot {
        padding: 0.6rem 0.85rem;
    }

    .calc-hero__stat:last-child {
        display: none;
    }

    .calc-cta {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }

    .calc-cta__actions {
        justify-content: center;
    }
}

/* ---------- Dark mode accents ---------- */
[data-theme="dark"] .calc-result__item {
    background: rgba(255, 255, 255, 0.03);
}

[data-theme="dark"] .calc-hero::before {
    background-image:
        radial-gradient(circle at 15% 20%, rgba(255, 255, 255, 0.1), transparent 45%),
        radial-gradient(circle at 85% 80%, rgba(59, 130, 246, 0.4), transparent 50%);
}

[data-theme="dark"] .calc-fav.is-active {
    background: rgba(245, 158, 11, 0.16);
    border-color: rgba(245, 158, 11, 0.5);
    color: #fcd34d;
}

/* ---------- Focus view: dark ---------- */
[data-theme="dark"] .calc-focus .calc-card__body > .calc-form {
    background: rgba(255, 255, 255, 0.025);
    border-color: rgba(148, 163, 184, 0.18);
}

[data-theme="dark"] .calc-focus .calc-input,
[data-theme="dark"] .calc-focus .calc-select {
    box-shadow: none;
}

[data-theme="dark"] .calc-focus .calc-select--unit {
    background: var(--calc-accent-soft, rgba(59, 130, 246, 0.16));
    color: var(--calc-accent-ink, #93c5fd);
}

[data-theme="dark"] .calc-focus .calc-result {
    box-shadow: 0 20px 40px -32px rgba(0, 0, 0, 0.85);
}

[data-theme="dark"] .calc-focus .calc-result__item {
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.14);
}

[data-theme="dark"] .calc-focus .calc-result__item.is-solved {
    background: rgba(255, 255, 255, 0.16);
    border-color: rgba(255, 255, 255, 0.32);
}

[data-theme="dark"] .calc-card__chip {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(148, 163, 184, 0.2);
}

[data-theme="dark"] .calc-card__chip--tag {
    background: var(--calc-accent-soft, rgba(59, 130, 246, 0.16));
    border-color: var(--calc-accent-border, transparent);
    color: var(--calc-accent-ink, #93c5fd);
}

/* در تم تاریک متن‌های رنگی باید روشن‌تر باشند تا خوانا بمانند */
[data-theme="dark"] .calc-section[data-cat="components"],
[data-theme="dark"] .calc-chip[data-cat="components"],
[data-theme="dark"] .calc-focus.calc-tone-components {
    --calc-accent-ink: #a5b4fc;
    --calc-accent-soft: rgba(79, 70, 229, 0.22);
    --calc-accent-border: rgba(129, 140, 248, 0.4);
}

[data-theme="dark"] .calc-section[data-cat="power"],
[data-theme="dark"] .calc-chip[data-cat="power"],
[data-theme="dark"] .calc-focus.calc-tone-power {
    --calc-accent-ink: #fdba74;
    --calc-accent-soft: rgba(234, 88, 12, 0.2);
    --calc-accent-border: rgba(251, 146, 60, 0.4);
}

[data-theme="dark"] .calc-section[data-cat="motors"],
[data-theme="dark"] .calc-chip[data-cat="motors"],
[data-theme="dark"] .calc-focus.calc-tone-motors {
    --calc-accent-ink: #5eead4;
    --calc-accent-soft: rgba(13, 148, 136, 0.2);
    --calc-accent-border: rgba(45, 212, 191, 0.4);
}

[data-theme="dark"] .calc-chip:hover,
[data-theme="dark"] .ct-tile:hover .ct-tile__go {
    color: var(--calc-accent-ink, var(--app-primary));
}