/* ============================================
   PAGE HERO
   ============================================ */
.gs-page-hero {
    background: linear-gradient(135deg, var(--gs-primary, #c41e3a) 0%, #8b1528 100%);
    padding: 2rem 0 3rem;
}

.gs-page-title {
    color: var(--gs-text-inverse);
    font-size: 2.5rem;
    margin: 0 0 0.5rem 0;
    font-weight: 700;
}

.gs-page-subtitle {
    color: rgba(255,255,255,0.9);
    font-size: 1.1rem;
    margin: 0;
}

/* Fil d'Ariane */
.gs-page-breadcrumb {
    margin-bottom: 1.5rem;
}

.gs-page-breadcrumb ul {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.9rem;
}

.gs-page-breadcrumb li {
    display: flex;
    align-items: center;
}

.gs-page-breadcrumb li:not(:last-child)::after {
    content: '/';
    margin-left: 0.5rem;
    color: rgba(255,255,255,0.5);
}

.gs-page-breadcrumb a {
    color: rgba(255,255,255,0.8);
    text-decoration: none;
    transition: color 0.2s ease;
}

.gs-page-breadcrumb a:hover {
    color: var(--gs-text-inverse);
}

.gs-page-breadcrumb li:last-child span {
    color: var(--gs-text-inverse);
    font-weight: 500;
}

/* ============================================
   CALCULATOR WRAPPER
   ============================================ */
.gs-calculator-section {
    padding: 3rem 0;
}

.gs-calculator-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

@media (max-width: 992px) {
    .gs-calculator-wrapper {
        grid-template-columns: 1fr;
    }
}

/* ============================================
   FORM STYLES
   ============================================ */
.gs-calculator-form {
    background: var(--gs-bg-white);
    border-radius: 12px;
    padding: 2rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
}

.gs-calc-group {
    margin-bottom: 1.5rem;
}

.gs-calc-group:last-child {
    margin-bottom: 0;
}

.gs-calc-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-weight: 600;
    color: var(--gs-secondary, #2c3e50);
    margin-bottom: 0.75rem;
    font-size: 0.95rem;
}

.gs-calc-label i {
    color: var(--gs-primary, #c41e3a);
}

/* Radio Group */
.gs-calc-radio-group {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 0.75rem;
}

@media (max-width: 992px) {
    .gs-calc-radio-group {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 576px) {
    .gs-calc-radio-group {
        grid-template-columns: 1fr;
    }
}

.gs-calc-radio {
    cursor: pointer;
}

.gs-calc-radio input {
    display: none;
}

.gs-calc-radio-box {
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    padding: 1rem;
    border: 2px solid var(--gs-border, #e5e5e5);
    border-radius: var(--gs-radius-md);
    transition: all 0.2s ease;
}

.gs-calc-radio-box i {
    font-size: 1.5rem;
    color: #888;
    margin-bottom: 0.5rem;
    transition: color 0.2s ease;
}

.gs-calc-radio-box span {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--gs-secondary, #2c3e50);
}

.gs-calc-radio-box small {
    font-size: 0.7rem;
    color: #888;
    margin-top: 0.25rem;
}

.gs-calc-radio input:checked + .gs-calc-radio-box {
    border-color: var(--gs-primary, #c41e3a);
    background: rgba(196, 30, 58, 0.05);
}

.gs-calc-radio input:checked + .gs-calc-radio-box i {
    color: var(--gs-primary, #c41e3a);
}

/* Form Fields */
.gs-calc-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

@media (max-width: 576px) {
    .gs-calc-row {
        grid-template-columns: 1fr;
    }
}

.gs-calc-field {
    margin-bottom: 1rem;
}

.gs-calc-field:last-child {
    margin-bottom: 0;
}

.gs-calc-field label {
    display: block;
    font-size: 0.85rem;
    color: #666;
    margin-bottom: 0.4rem;
}

.gs-calc-select,
.gs-calc-input {
    width: 100%;
    padding: 0.75rem 1rem;
    border: 2px solid var(--gs-border, #e5e5e5);
    border-radius: var(--gs-radius-md);
    font-size: 1rem;
    transition: border-color 0.2s ease;
    background: var(--gs-bg-white);
}

.gs-calc-select:focus,
.gs-calc-input:focus {
    outline: none;
    border-color: var(--gs-primary, #c41e3a);
}

.gs-calc-input-wrapper {
    position: relative;
}

.gs-calc-input-hint {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.75rem;
    color: #888;
    pointer-events: none;
}

/* Dimensions personnalisées */
.gs-calc-dimensions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.gs-calc-dimensions .gs-calc-input {
    flex: 1;
    text-align: center;
}

.gs-calc-dimensions-sep {
    color: var(--gs-text-muted, #95a5a6);
    font-weight: 500;
}

/* Toggle unité mm / cm */
.gs-calc-unit-toggle {
    display: inline-flex;
    margin-top: 0.6rem;
    border: 1px solid var(--gs-border, #e5e5e5);
    border-radius: 6px;
    overflow: hidden;
    background: var(--gs-bg-white);
}

.gs-calc-unit-option {
    cursor: pointer;
    margin: 0;
    position: relative;
}

.gs-calc-unit-option input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.gs-calc-unit-option span {
    display: inline-block;
    padding: 0.4rem 1rem;
    font-size: 0.85rem;
    color: #666;
    transition: background 0.2s ease, color 0.2s ease;
    user-select: none;
}

.gs-calc-unit-option input:checked + span {
    background: var(--gs-primary, #c41e3a);
    color: var(--gs-text-inverse);
    font-weight: 600;
}

.gs-calc-unit-option input:focus-visible + span {
    outline: 2px solid var(--gs-primary, #c41e3a);
    outline-offset: 2px;
}

/* Avertissement input (nombre de pages impair) */
.gs-calc-warn {
    display: block;
    margin-top: 0.4rem;
    font-size: 0.8rem;
    color: #b58a00;
}

.gs-calc-warn i {
    margin-right: 0.3rem;
}

/* ============================================
   RÉSULTAT
   ============================================ */
.gs-calculator-result {
    position: sticky;
    top: 120px;
}

/* Visualisation poids */
.gs-calc-visual-weight {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background: linear-gradient(135deg, var(--gs-bg-light) 0%, #f0f0f0 100%);
    border-radius: 12px;
    min-height: 180px;
    margin-bottom: 1.5rem;
}

.gs-calc-weight-icon {
    font-size: 3rem;
    color: var(--gs-primary, #c41e3a);
    margin-bottom: 1rem;
    animation: weightBounce 2s ease-in-out infinite;
}

@keyframes weightBounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

.gs-calc-weight-display {
    text-align: center;
}

.gs-calc-weight-unit {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.gs-calc-weight-value {
    font-size: 3rem;
    font-weight: 700;
    color: var(--gs-primary, #c41e3a);
    line-height: 1;
}

.gs-calc-weight-label {
    font-size: 1rem;
    color: var(--gs-text-muted, #95a5a6);
    margin-top: 0.5rem;
}

/* Result Box */
.gs-calc-result-box {
    background: var(--gs-bg-white);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 4px 20px rgba(0,0,0,0.08);
    margin-bottom: 1rem;
}

.gs-calc-result-main {
    text-align: center;
    padding-bottom: 1rem;
    margin-bottom: 1rem;
    border-bottom: 2px solid var(--gs-border-light);
}

.gs-calc-result-label {
    display: block;
    font-size: 0.9rem;
    color: #666;
    margin-bottom: 0.5rem;
}

.gs-calc-result-value {
    font-size: 3rem;
    font-weight: 700;
    color: var(--gs-primary, #c41e3a);
    line-height: 1;
}

.gs-calc-result-unit {
    font-size: 1.5rem;
    color: var(--gs-secondary, #2c3e50);
    margin-left: 0.25rem;
}

/* Détails */
.gs-calc-result-details {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.gs-calc-result-detail {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.5rem 0;
    border-bottom: 1px solid var(--gs-bg-alt);
}

.gs-calc-result-detail:last-child {
    border-bottom: none;
}

.gs-calc-detail-label {
    color: #666;
    font-size: 0.9rem;
}

.gs-calc-detail-value {
    color: var(--gs-secondary, #2c3e50);
    font-weight: 600;
    font-size: 0.9rem;
}

/* Infos tirage */
.gs-calc-tirage-info {
    background: var(--gs-bg-light);
    border-radius: 12px;
    padding: 1rem 1.25rem;
    margin-bottom: 1rem;
}

.gs-calc-tirage-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 0;
    color: var(--gs-text-muted, #95a5a6);
    font-size: 0.95rem;
}

.gs-calc-tirage-row:not(:last-child) {
    border-bottom: 1px solid var(--gs-border-light);
}

.gs-calc-tirage-row i {
    width: 20px;
    color: var(--gs-primary, #c41e3a);
}

.gs-calc-tirage-row strong {
    margin-left: auto;
    color: var(--gs-secondary, #2c3e50);
}

/* CTA */
.gs-calc-cta {
    text-align: center;
}

.gs-btn-block {
    display: block;
    width: 100%;
}

.gs-calc-cta-text {
    margin-top: 0.75rem;
    font-size: 0.85rem;
    color: #888;
}

.gs-calc-cta-text i {
    margin-right: 0.25rem;
}

/* ============================================
   SECTION INFO SEO
   ============================================ */
.gs-calc-info {
    padding: 3rem 0;
}

.gs-calc-info-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 3rem;
}

@media (max-width: 992px) {
    .gs-calc-info-grid {
        grid-template-columns: 1fr;
    }
}

.gs-calc-info-main h2 {
    color: var(--gs-secondary, #2c3e50);
    margin-bottom: 1rem;
}

.gs-calc-info-main h3 {
    color: var(--gs-secondary, #2c3e50);
    margin-top: 1.5rem;
    margin-bottom: 0.75rem;
    font-size: 1.1rem;
}

.gs-calc-info-main p {
    color: #555;
    line-height: 1.7;
    margin-bottom: 1rem;
}

.gs-calc-formula {
    background: var(--gs-bg-light);
    border-left: 4px solid var(--gs-primary, #c41e3a);
    padding: 1rem 1.5rem;
    margin: 1rem 0;
    border-radius: 0 var(--gs-radius-md) var(--gs-radius-md) 0;
}

.gs-calc-formula code {
    font-family: 'Roboto Mono', monospace;
    font-size: 0.95rem;
    color: var(--gs-secondary, #2c3e50);
}

/* Exemple liste */
.gs-calc-example-list {
    background: var(--gs-bg-light);
    padding: 1rem 1.5rem;
    border-radius: var(--gs-radius-md);
    margin: 1rem 0;
    list-style: none;
}

.gs-calc-example-list li {
    padding: 0.25rem 0;
    color: #555;
}

/* Sidebar */
.gs-calc-info-sidebar {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.gs-calc-info-card {
    background: var(--gs-bg-white);
    border-radius: 12px;
    padding: 1.5rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.06);
}

.gs-calc-info-card h4 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--gs-secondary, #2c3e50);
    margin-bottom: 1rem;
    font-size: 1rem;
}

.gs-calc-info-card h4 i {
    color: var(--gs-primary, #c41e3a);
}

.gs-calc-info-card ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.gs-calc-info-card li {
    padding: 0.5rem 0;
    padding-left: 1rem;
    position: relative;
    color: #555;
    font-size: 0.9rem;
    border-bottom: 1px solid var(--gs-bg-alt);
}

.gs-calc-info-card li:last-child {
    border-bottom: none;
}

.gs-calc-info-card li::before {
    content: '•';
    position: absolute;
    left: 0;
    color: var(--gs-primary, #c41e3a);
    font-weight: bold;
}

.gs-calc-info-card a {
    color: var(--gs-primary, #c41e3a);
    text-decoration: none;
}

.gs-calc-info-card a:hover {
    text-decoration: underline;
}

/* Table formats */
.gs-calc-table {
    width: 100%;
    font-size: 0.9rem;
}

.gs-calc-table td {
    padding: 0.4rem 0;
    border-bottom: 1px solid var(--gs-bg-alt);
}

.gs-calc-table td:first-child {
    font-weight: 600;
    color: var(--gs-secondary, #2c3e50);
}

.gs-calc-table td:last-child {
    text-align: right;
    color: #666;
}

.gs-calc-table tr:last-child td {
    border-bottom: none;
}

/* Autres outils */
.gs-calc-other-tools {
    text-align: center;
    padding: 2rem 0;
}

.gs-calc-other-tools h3 {
    color: var(--gs-secondary, #2c3e50);
    margin-bottom: 1.5rem;
}

.gs-calc-tool-link {
    display: inline-flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem 2rem;
    background: var(--gs-bg-white);
    border: 2px solid var(--gs-border, #e5e5e5);
    border-radius: 12px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.gs-calc-tool-link:hover {
    border-color: var(--gs-primary, #c41e3a);
    transform: translateY(-3px);
    box-shadow: 0 5px 20px rgba(0,0,0,0.1);
}

.gs-calc-tool-link i {
    font-size: 1.5rem;
    color: var(--gs-primary, #c41e3a);
}

.gs-calc-tool-link span {
    font-weight: 600;
    color: var(--gs-secondary, #2c3e50);
}

.gs-calc-tool-link small {
    display: block;
    font-size: 0.8rem;
    color: #888;
    margin-top: 0.25rem;
}