/* Rebar Weight Calculator */
.rwc-page {
    background: var(--tools-bg, #f4f7fc);
    min-height: 60vh;
    padding-bottom: clamp(3rem, 8vw, 5rem);
    color: var(--tools-text, #0f172a);
}

.rwc-page__hero {
    position: relative;
    overflow: hidden;
    background: linear-gradient(165deg, #eef4ff 0%, var(--tools-bg, #f4f7fc) 55%);
    border-bottom: 1px solid var(--tools-line, #dfe8f5);
    padding: clamp(2.25rem, 5vw, 3.75rem) clamp(1.25rem, 5vw, 3rem) clamp(1.75rem, 4vw, 2.75rem);
    text-align: center;
}

.rwc-page__hero-backdrop {
    position: absolute;
    inset: 0;
    pointer-events: none;
    background:
        radial-gradient(ellipse 70% 50% at 50% 0%, rgba(30, 99, 255, 0.12) 0%, transparent 58%),
        radial-gradient(ellipse 40% 30% at 12% 80%, rgba(100, 116, 139, 0.1) 0%, transparent 50%);
}

.rwc-page__hero-inner {
    position: relative;
    z-index: 1;
    max-width: 46rem;
    margin: 0 auto;
}

.rwc-page__breadcrumb {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
    gap: 0.4rem;
    margin: 0 0 1.1rem;
    font-size: 0.875rem;
    color: var(--tools-muted, #52627a);
}

.rwc-page__breadcrumb a {
    color: var(--tools-primary, #1e63ff);
    text-decoration: none;
}

.rwc-page__breadcrumb a:hover {
    text-decoration: underline;
}

.rwc-page__breadcrumb-sep {
    color: var(--tools-line, #dfe8f5);
}

.rwc-page__eyebrow {
    margin: 0 0 0.5rem;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--tools-primary, #1e63ff);
}

.rwc-page__title {
    margin: 0 0 0.85rem;
    font-size: clamp(1.75rem, 4vw + 0.6rem, 2.65rem);
    font-weight: 800;
    line-height: 1.12;
    letter-spacing: -0.03em;
}

.rwc-page__lead {
    margin: 0 auto 0.85rem;
    max-width: 42rem;
    font-size: clamp(1rem, 1.2vw + 0.85rem, 1.125rem);
    line-height: 1.65;
    color: var(--tools-muted, #52627a);
}

.rwc-page__note {
    margin: 0;
    display: inline-block;
    padding: 0.35rem 0.75rem;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--tools-success, #15803d);
    background: var(--tools-success-bg, #f0fdf4);
    border-radius: 999px;
}

.rwc-page__main {
    max-width: 1080px;
    margin: 0 auto;
    padding: clamp(1.5rem, 4vw, 2.5rem) clamp(1.25rem, 5vw, 3rem) 0;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.rwc-panel {
    background: var(--tools-surface, #fff);
    border: 1px solid var(--tools-line, #dfe8f5);
    border-radius: var(--tools-radius, 16px);
    padding: clamp(1.15rem, 3vw, 1.75rem);
    box-shadow: var(--tools-shadow, 0 14px 36px rgba(15, 23, 42, 0.08));
}

.rwc-panel__title {
    margin: 0 0 0.35rem;
    font-size: 1.2rem;
    font-weight: 700;
}

.rwc-panel__hint {
    margin: 0 0 1.15rem;
    font-size: 0.9rem;
    line-height: 1.55;
    color: var(--tools-muted, #52627a);
}

.rwc-grid {
    display: grid;
    gap: 1rem;
}

@media (min-width: 640px) {
    .rwc-grid--2 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }

    .rwc-grid--3 {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }
}

.rwc-field {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    min-width: 0;
}

.rwc-field__label {
    font-size: 0.875rem;
    font-weight: 600;
}

.rwc-field__help {
    margin: 0;
    font-size: 0.78rem;
    line-height: 1.45;
    color: var(--tools-muted, #52627a);
}

.rwc-input,
.rwc-select {
    width: 100%;
    box-sizing: border-box;
    padding: 0.7rem 0.9rem;
    font: inherit;
    font-size: 1rem;
    color: var(--tools-text, #0f172a);
    background: var(--tools-shade, #eef3fb);
    border: 1px solid var(--tools-line, #dfe8f5);
    border-radius: var(--tools-radius-sm, 10px);
}

.rwc-input:focus,
.rwc-select:focus {
    outline: none;
    border-color: var(--tools-primary, #1e63ff);
    box-shadow: 0 0 0 3px rgba(30, 99, 255, 0.15);
    background: #fff;
}

.rwc-mode-grid {
    display: grid;
    gap: 0.55rem;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    margin-bottom: 0.75rem;
}

.rwc-mode {
    position: relative;
}

.rwc-mode input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.rwc-mode span {
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    min-height: 2.75rem;
    padding: 0.55rem 0.65rem;
    font-size: 0.875rem;
    font-weight: 600;
    border: 1px solid var(--tools-line, #dfe8f5);
    border-radius: var(--tools-radius-sm, 10px);
    background: var(--tools-shade, #eef3fb);
    cursor: pointer;
    transition: border-color 0.15s ease, background 0.15s ease, color 0.15s ease;
}

.rwc-mode input:checked + span {
    color: #fff;
    background: var(--tools-primary, #1e63ff);
    border-color: var(--tools-primary, #1e63ff);
}

.rwc-mode input:focus-visible + span {
    box-shadow: 0 0 0 3px rgba(30, 99, 255, 0.2);
}

.rwc-alert {
    margin: 0 0 1rem;
    padding: 0.75rem 1rem;
    border-radius: var(--tools-radius-sm, 10px);
    font-size: 0.9rem;
    line-height: 1.5;
}

.rwc-alert--error {
    color: var(--tools-error, #b91c1c);
    background: var(--tools-error-bg, #fef2f2);
    border: 1px solid rgba(185, 28, 28, 0.2);
}

.rwc-alert--warning {
    color: var(--tools-warning, #b45309);
    background: var(--tools-warning-bg, #fffbeb);
    border: 1px solid rgba(180, 83, 9, 0.2);
    margin-bottom: 1rem;
}

.rwc-alert ul {
    margin: 0;
    padding-left: 1.1rem;
}

.rwc-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 0.65rem;
    align-items: center;
}

.rwc-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.35rem;
    padding: 0.65rem 1.15rem;
    font: inherit;
    font-size: 0.9375rem;
    font-weight: 600;
    border-radius: 999px;
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
}

.rwc-btn--primary {
    color: #fff;
    background: var(--tools-primary, #1e63ff);
    padding: 0.85rem 1.5rem;
    font-size: 1.05rem;
    min-width: 11rem;
}

.rwc-btn--primary:hover {
    background: var(--tools-primary-dark, #1554e0);
}

.rwc-btn--secondary {
    color: var(--tools-text, #0f172a);
    background: var(--tools-shade, #eef3fb);
    border-color: var(--tools-line, #dfe8f5);
}

.rwc-status {
    font-size: 0.875rem;
    color: var(--tools-muted, #52627a);
}

.rwc-results[hidden] {
    display: none !important;
}

.rwc-summary {
    display: grid;
    gap: 0.75rem;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    margin: 0 0 1rem;
}

.rwc-summary__card {
    background: var(--tools-shade, #eef3fb);
    border-radius: var(--tools-radius-sm, 10px);
    padding: 0.9rem 1rem;
}

.rwc-summary__label {
    margin: 0 0 0.25rem;
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--tools-muted, #52627a);
}

.rwc-summary__value {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.rwc-formula {
    margin: 0;
    font-size: 0.875rem;
    line-height: 1.55;
    color: var(--tools-muted, #52627a);
}

.rwc-export {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: 1rem;
}

.rwc-related {
    font-size: 0.95rem;
    line-height: 1.6;
}

.rwc-related a {
    color: var(--tools-primary, #1e63ff);
}

.rwc-faq {
    max-width: 1080px;
    margin: 0 auto;
    padding: clamp(1.5rem, 4vw, 2.5rem) clamp(1.25rem, 5vw, 3rem) 0;
}

.rwc-faq__list {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.rwc-faq__item {
    background: var(--tools-surface, #fff);
    border: 1px solid var(--tools-line, #dfe8f5);
    border-radius: var(--tools-radius-sm, 10px);
    padding: 0 1rem;
}

.rwc-faq__item summary {
    cursor: pointer;
    padding: 0.95rem 0;
    font-weight: 650;
    list-style: none;
}

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

.rwc-faq__item p, .rwc-faq__item > div {
    margin: 0 0 1rem;
    color: var(--tools-muted, #52627a);
    font-size: 0.95rem;
    line-height: 1.65;
}

@media print {
    .app-navbar,
    .site-footer,
    .cookie-banner,
    .chat-widget,
    .rwc-actions,
    .rwc-export,
    .rwc-page__note,
    .rwc-related,
    .site-messages {
        display: none !important;
    }

    .rwc-page,
    .rwc-panel {
        background: #fff !important;
        box-shadow: none !important;
    }

    .rwc-page__hero {
        background: none !important;
        border: 0 !important;
    }

    .rwc-page__hero-backdrop {
        display: none !important;
    }

    .rwc-results[hidden] {
        display: block !important;
    }

    /* Hide FAQ + size print brand (also in tools.css; duplicated for collectstatic safety) */
    .rwc-faq {
        display: none !important;
    }

    .tools-print-brand[hidden],
    .tools-print-brand {
        display: flex !important;
        align-items: center;
        gap: 0.5rem;
        margin: 0 0 0.85rem;
        padding: 0 0 0.55rem;
        border-bottom: 1px solid #cbd5e1;
        color: #0f172a;
        line-height: 1.2;
    }

    .tools-print-brand__logo {
        display: block !important;
        width: 28px !important;
        height: 28px !important;
        max-width: 28px !important;
        max-height: 28px !important;
        object-fit: contain !important;
        flex: 0 0 28px;
    }

    .tools-print-brand__name {
        font-size: 0.95rem;
        font-weight: 700;
    }

    .tools-print-brand__url {
        margin-left: 0.15rem;
        font-size: 0.8rem;
        font-weight: 500;
        color: #475569;
    }

    .tools-print-brand__url::before {
        content: "·";
        margin-right: 0.4rem;
        color: #94a3b8;
    }
}