:root {
    --bg-color: #ffffff;
    --surface-color: #f9fafb;
    --surface-border: #e5e7eb;
    --text-primary: #111827;
    --text-secondary: #4b5563;
    --accent-color: #000000;
    --accent-hover: #333333;
    --danger-color: #000000;
    --success-color: #000000;
    --glass-blur: none;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

[data-theme="dark"] {
    --bg-color: #000000;
    --surface-color: #111827;
    --surface-border: #374151;
    --text-primary: #ffffff;
    --text-secondary: #9ca3af;
    --accent-color: #ffffff;
    --accent-hover: #e5e7eb;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* Removed background effects for clean B&W style */

/* Layout */
.app-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: 2rem 1.5rem;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-bottom: 3rem;
    flex-wrap: wrap;
    gap: 1.5rem;
}

.header-content {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.logo-rk3 {
    max-height: 60px;
    width: auto;
    margin-bottom: 1rem;
    object-fit: contain;
    transition: filter 0.3s ease;
}

[data-theme="dark"] .logo-rk3 {
    filter: invert(1);
}

.header-content h1 {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 0.25rem;
    color: var(--text-primary);
    letter-spacing: -1px;
}

.subtitle {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}

.header-content p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    max-width: 500px;
}

/* Theme Toggle */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    background: var(--surface-color);
    border: 1px solid var(--surface-border);
    border-radius: 50%;
    cursor: pointer;
    color: var(--text-primary);
    transition: var(--transition);
}

.theme-toggle:hover {
    border-color: var(--text-secondary);
    background: rgba(128, 128, 128, 0.1);
}

.theme-toggle svg {
    transition: var(--transition);
}

/* Tabs */
.product-tabs {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    border-bottom: 1px solid var(--surface-border);
    padding-bottom: 1rem;
    overflow-x: auto;
    scrollbar-width: none;
}

.product-tabs::-webkit-scrollbar {
    display: none;
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 1.1rem;
    font-weight: 500;
    cursor: pointer;
    padding: 0.75rem 1.5rem;
    border-radius: 12px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    transition: var(--transition);
    white-space: nowrap;
}

.tab-btn:hover {
    color: var(--text-primary);
    background: rgba(0, 0, 0, 0.05);
}

.tab-btn.active {
    color: var(--text-primary);
    background: var(--surface-color);
    border: 1px solid var(--surface-border);
    backdrop-filter: var(--glass-blur);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.tab-btn svg {
    opacity: 0.7;
    transition: var(--transition);
}

.tab-btn.active svg {
    opacity: 1;
    color: var(--accent-color);
}

/* Tables */
.table-container {
    position: relative;
    min-height: 400px;
}

.table-wrapper {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: var(--transition);
    background: var(--surface-color);
    border: 1px solid var(--surface-border);
    border-radius: 16px;
    backdrop-filter: var(--glass-blur);
    overflow: hidden;
    box-shadow: 0 10px 25px -5px rgba(0, 0, 0, 0.3);
}

.table-wrapper.active {
    position: relative;
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.measurements-table {
    width: 100%;
    border-collapse: collapse;
    text-align: center;
    table-layout: fixed;
}

.measurements-table th {
    padding: 1.25rem 1.5rem;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--surface-border);
    background: rgba(0, 0, 0, 0.2);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.measurements-table td {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--surface-border);
    color: var(--text-primary);
    transition: var(--transition);
}

.measurements-table tbody tr {
    transition: var(--transition);
}

.measurements-table tbody tr:hover {
    background: rgba(0, 0, 0, 0.03);
    transform: scale(1.01);
}

.measurements-table tbody tr:last-child td {
    border-bottom: none;
}

.measurements-table td:first-child {
    font-weight: 700;
    color: var(--accent-color);
    font-size: 1.1rem;
    text-align: center;
}

/* Tooltips */
.has-tooltip {
    position: relative;
    cursor: help;
}

.tooltip-content {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
}

.has-tooltip::after {
    content: "ⓘ";
    font-size: 0.8rem;
    opacity: 0.5;
}

.tooltip {
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-10px);
    background: #1e293b;
    color: #f8fafc;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.8rem;
    width: max-content;
    max-width: 200px;
    text-transform: none;
    letter-spacing: normal;
    pointer-events: none;
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 10;
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.1);
    border: 1px solid #e5e7eb;
    font-weight: 400;
}

.tooltip::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-width: 6px;
    border-style: solid;
    border-color: #1e293b transparent transparent transparent;
}

.has-tooltip:hover .tooltip {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(-5px);
}

/* How to Measure Section */
.how-to-measure {
    margin-top: 4rem;
}

.how-to-measure h2 {
    font-size: 2rem;
    margin-bottom: 1rem;
}

.how-to-measure > p {
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 700px;
}

.visual-instruction {
    display: flex;
    justify-content: center;
    align-items: center;
    margin-top: 2rem;
    padding: 2rem;
    background: var(--surface-color);
    border: 1px solid var(--surface-border);
    border-radius: 20px;
    backdrop-filter: var(--glass-blur);
}

.measurement-diagram {
    max-width: 100%;
    height: auto;
    border-radius: 12px;
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.1);
    border: 1px solid #e5e7eb;
    display: block;
}

.diagram-container {
    position: relative;
    display: inline-block;
    max-width: 100%;
}

.diagram-label {
    position: absolute;
    background-color: var(--text-primary);
    color: var(--bg-color);
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 700;
    pointer-events: none;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
    transform: translate(-50%, -50%);
    white-space: nowrap;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: 2px solid var(--bg-color);
}

.label-torax {
    top: 48%;
    left: 50%;
}

.label-comprimento {
    top: 75%;
    left: 45%;
}

.label-manga {
    top: 42%;
    left: 82%;
}

/* Responsive Table / Mobile Cards */
@media (max-width: 768px) {
    .app-header {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .measurements-table, 
    .measurements-table tbody, 
    .measurements-table tr, 
    .measurements-table td {
        display: block;
        width: 100%;
    }
    
    .measurements-table thead {
        display: none;
    }
    
    .measurements-table tr {
        margin-bottom: 1rem;
        background: #ffffff;
        border: 1px solid var(--surface-border);
        border-radius: 12px;
        padding: 0.5rem;
    }
    
    .measurements-table td {
        display: flex;
        justify-content: space-between;
        align-items: center;
        padding: 0.75rem 1rem;
        text-align: right;
        border-bottom: 1px solid var(--surface-border);
    }
    
    .measurements-table td::before {
        content: attr(data-label);
        font-weight: 600;
        color: var(--text-secondary);
        text-transform: uppercase;
        font-size: 0.8rem;
        text-align: left;
        margin-right: 1rem;
    }
    
    .measurements-table td:first-child {
        text-align: center;
        background: rgba(0,0,0,0.2);
        border-radius: 8px;
        margin-bottom: 0.5rem;
        border-bottom: none;
    }
    
    .measurements-table td:first-child::before {
        display: none;
    }
}