/* ===== CSS VARIABLES ===== */
:root {
    --primary-color: #C00;
    --secondary-color: #a10505;
    --accent-color: #ff6b00;
    
    --bg-dark: #f8f8f8;
    --bg-surface: #ffffff;
    --bg-elevated: #f0f0f0;
    --bg-hover: #e8e8e8;
    
    --text-primary: #1a1a1a;
    --text-secondary: #666;
    --text-muted: #999;
    
    --border-color: #e0e0e0;
    --border-light: #d5d5d5;
    
    --glow-primary: rgba(204, 0, 0, 0.15);
    --glow-accent: rgba(255, 107, 0, 0.1);
}

/* ===== RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family:  'Wuerth','SF Mono', 'Fira Code', 'Consolas', monospace;
    background: var(--bg-dark);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* ===== MAIN LAYOUT ===== */
.wrapper {
    display: flex;
    min-height: 100vh;
}

.fixed-wrapper {
    display: none;
}

/* ===== CONTENT WRAPPER ===== */
.content-wrapper {
    flex: 1;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ===== TOP BAR ===== */
.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 14px 40px;
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    /*position: sticky;*/
    top: 0;
    z-index: 50;
}

.topbar h1 {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.3px;
}

.topbar-status {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    color: var(--text-secondary);
    background: var(--bg-elevated);
    padding: 6px 12px;
    border-radius: 20px;
    border: 1px solid var(--border-color);
}

.status-dot {
    width: 8px;
    height: 8px;
    background: #22c55e;
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

/* ===== CONTENT AREA ===== */
.content {
    flex: 1;
    padding: 16px 40px;
}

.container {
    max-width: 900px;
    margin: 0 auto;
}

/* ===== TABS ===== */
.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

/* ===== CALCULATOR CONTAINER ===== */
.calculator-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* ===== PRODUCT HERO ===== */
.calculator-form {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 0;
    overflow: hidden;
}

.product-hero {
    display: flex;
    align-items: stretch;
}

.product-image-container {
    width: 140px;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
    border-right: 1px solid var(--border-color);
}

.product-image {
    width: 90px;
    height: 90px;
    object-fit: contain;
    transition: transform 0.3s ease;
}

.product-image:hover {
    transform: scale(1.1);
}

.product-info-side {
    flex: 1;
    padding: 16px 24px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 12px;
}

.image-caption {
    font-size: 20px;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    letter-spacing: -0.5px;
}

/* ===== FORM ELEMENTS ===== */
.form-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

label {
    font-size: 10px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1.5px;
}

select,
input[type="number"] {
    width: 100%;
    padding: 10px 14px;
    font-size: 13px;
    font-family: inherit;
    font-weight: 500;
    color: var(--text-primary);
    background: var(--bg-dark);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    outline: none;
    transition: all 0.2s ease;
    appearance: none;
    -webkit-appearance: none;
}

select {
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' viewBox='0 0 24 24' fill='none' stroke='%23999' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 40px;
    cursor: pointer;
}

select option {
    background: #f8f8f8;
    color: #1a1a1a;
}

select:hover,
input[type="number"]:hover {
    border-color: var(--border-light);
    background: var(--bg-elevated);
}

select:focus,
input[type="number"]:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--glow-primary);
}

input::-webkit-outer-spin-button,
input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

input[type="number"] {
    -moz-appearance: textfield;
}

/* ===== PARAMETERS GRID ===== */
.params-grid {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 16px;
}

.param-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
}

.param-card-header {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 16px;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border-color);
    font-size: 11px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.param-card-header svg {
    stroke: var(--primary-color);
    opacity: 0.8;
}

.param-card-body {
    padding: 14px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.anchortype-material .param-card-body {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

/* Hidden groups */
#size-group,
#sleeve-group,
.diameter-select-container {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 12px;
}

/* ===== MEASUREMENTS STRIP ===== */
.diameter-depth,
.measurements-strip {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 16px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 0;
    overflow: hidden;
}

.measure-item {
    padding: 16px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
    text-align: center;
    border-right: 1px solid var(--border-color);
    position: relative;
}

.measure-item:last-child {
    border-right: none;
}

.measure-icon {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, rgba(204,0,0,0.15), rgba(255,107,0,0.1));
    border: 1px solid rgba(204,0,0,0.3);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.measure-icon svg {
    stroke: var(--primary-color);
}

.measure-item .form-group {
    width: 100%;
    position: relative;
}

.measure-item input {
    text-align: center;
}

.unit-label {
    position: absolute;
    right: 14px;
    bottom: 14px;
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
}

/* ===== CALCULATE BUTTON ===== */
button,
#calculate-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 14px 32px;
    font-size: 13px;
    font-family: inherit;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 2px;
    position: relative;
    overflow: hidden;
}

button::before,
#calculate-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

button:hover::before,
#calculate-btn:hover::before {
    left: 100%;
}

button:hover,
#calculate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px var(--glow-primary);
}

button:active,
#calculate-btn:active {
    transform: translateY(0);
}

button svg,
#calculate-btn svg {
    transition: transform 0.3s ease;
}

button:hover svg,
#calculate-btn:hover svg {
    transform: translateX(4px);
}

/* ===== RESULTS DASHBOARD ===== */
.calculator-result {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
}

.calculator-result h2,
#resultss {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 18px 24px;
    background: var(--bg-elevated);
    border-bottom: 1px solid var(--border-color);
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 1.5px;
    margin: 0;
}

#resultss svg {
    stroke: var(--primary-color);
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1px;
    background: var(--border-color);
}

.result-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
    padding: 24px;
    background: var(--bg-surface);
    transition: background 0.2s ease;
}

.result-item:hover {
    background: var(--bg-elevated);
}

.result-highlight {
    background: linear-gradient(135deg, rgba(204,0,0,0.1), rgba(255,107,0,0.05));
}

.result-highlight:hover {
    background: linear-gradient(135deg, rgba(204,0,0,0.15), rgba(255,107,0,0.08));
}

.result-label {
    font-size: 10px;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
}

.result-value {
    font-size: 20px;
    font-weight: 700;
    color: var(--text-primary);
}

.result-highlight .result-value {
    background: linear-gradient(135deg, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.result-placeholder {
    color: var(--text-muted);
    font-weight: 400;
}

/* ===== TABS (for multi-tab layouts) ===== */
.tabs {
    display: flex;
    gap: 8px;
    margin-bottom: 24px;
}

.tab {
    flex: 1;
    padding: 14px 20px;
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    cursor: pointer;
    text-align: center;
    font-weight: 500;
    font-size: 13px;
    color: var(--text-secondary);
    transition: all 0.2s ease;
}

.tab:hover {
    border-color: var(--primary-color);
    color: var(--text-primary);
}

.tab.active {
    background: linear-gradient(135deg, rgba(204,0,0,0.2), rgba(255,107,0,0.1));
    border-color: var(--primary-color);
    color: var(--primary-color);
}

.tab h5 {
    margin: 0;
    font-size: inherit;
    font-weight: inherit;
}

/* ===== PRODUCT INFO SECTIONS ===== */
.product-info {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    margin-top: 24px;
}

.info-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
    margin-top: 16px;
}

.info-card {
    padding: 20px;
    background: var(--bg-elevated);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    transition: all 0.2s ease;
}

.info-card:hover {
    border-color: var(--primary-color);
    box-shadow: 0 0 20px var(--glow-primary);
}

.info-card h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--primary-color);
    margin-bottom: 8px;
}

.info-card p {
    font-size: 13px;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.info-card b {
    color: var(--accent-color);
}

/* ===== PROPERTY DISPLAY ===== */
.property {
    display: flex;
    justify-content: space-between;
    font-size: 13px;
    padding: 8px 0;
    border-bottom: 1px solid var(--border-color);
}

.property:last-child {
    border-bottom: none;
}

.property-name {
    color: var(--text-secondary);
}

.property-value {
    font-weight: 600;
    color: var(--accent-color);
}

/* ===== TABLES ===== */
.sizes-block h3 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 20px 0 12px;
}

.sizes-table,
.recommendation-table {
    width: 100%;
    border-collapse: collapse;
    border-radius: 12px;
    overflow: hidden;
    margin-bottom: 16px;
    border: 1px solid var(--border-color);
}

.sizes-table th,
.sizes-table td,
.recommendation-table th,
.recommendation-table td {
    padding: 14px 16px;
    text-align: center;
    font-size: 13px;
}

.sizes-table th,
.recommendation-table th {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: #fff;
    font-weight: 600;
    text-transform: uppercase;
    font-size: 11px;
    letter-spacing: 1px;
}

.sizes-table td,
.recommendation-table td {
    background: var(--bg-surface);
    color: var(--text-primary);
    border-bottom: 1px solid var(--border-color);
}

.sizes-table tr:last-child td,
.recommendation-table tr:last-child td {
    border-bottom: none;
}

.sizes-table tr:hover td,
.recommendation-table tr:hover td {
    background: var(--bg-elevated);
}

/* ===== BUTTONS & LINKS ===== */
.more-info {
    margin-top: 16px;
}

.more-info a {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 24px;
    background: transparent;
    color: var(--primary-color);
    text-decoration: none;
    border: 1px solid var(--primary-color);
    border-radius: 10px;
    font-weight: 600;
    font-size: 14px;
    transition: all 0.2s ease;
}

.more-info a:hover {
    background: var(--primary-color);
    color: white;
    box-shadow: 0 0 20px var(--glow-primary);
}

#calculate-btn a {
    color: inherit;
    text-decoration: none;
}

/* ===== FOOTER ===== */
footer.calc {
    text-align: center;
    padding: 32px 40px;
    color: var(--text-muted);
    font-size: 12px;
    border-top: 1px solid var(--border-color);
    margin-top: auto;
}

/* ===== HEADER (legacy support) ===== */
header:not(.topbar) {
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 0;
}

.header-content {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 40px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    height: 40px;
}

.logo img {
    height: 100%;
    width: auto;
}

nav:not(.sidebar-nav) {
    display: flex;
    gap: 8px;
}

nav:not(.sidebar-nav) a {
    padding: 8px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 14px;
    border-radius: 8px;
    transition: all 0.2s ease;
}

nav:not(.sidebar-nav) a:hover {
    background: var(--bg-elevated);
    color: var(--primary-color);
}

/* ===== UTILITIES ===== */
.manual-input-checkbox {
    margin-top: 12px;
    font-size: 14px;
    color: var(--text-secondary);
}

.input-with-unit {
    position: relative;
}

.unit {
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 13px;
}

.loss-percentage {
    display: flex;
    gap: 16px;
}

.loss-percentage .form-group {
    flex: 1;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .topbar {
        padding: 12px 16px;
    }
    
    .topbar h1 {
        font-size: 14px;
    }
    
    .content {
        padding: 12px 16px;
    }
    
    .params-grid {
        grid-template-columns: 1fr;
    }
    
    .product-hero {
        flex-direction: column;
    }
    
    .product-image-container {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .anchortype-material .param-card-body {
        grid-template-columns: 1fr;
    }
    
    .diameter-depth,
    .measurements-strip {
        grid-template-columns: 1fr;
    }
    
    .measure-item {
        border-right: none;
        border-bottom: 1px solid var(--border-color);
    }
    
    .measure-item:last-child {
        border-bottom: none;
    }
    
    .results-grid {
        grid-template-columns: 1fr;
    }
}