/* LEDTEK Corporate Design Colors (Light Theme & Violet) */
:root {
    --ledtek-violet: #7D3BBA;
    --ledtek-violet-hover: #632A99;
    --ledtek-dark-bg: #29124A;
    --ledtek-dark-bg-grad: #401B6B;
    --bg-page: #F3F4F6;
    --panel-bg: #FFFFFF;
    --border-color: #E5E7EB;
    --text-main: #1F2937;
    --text-muted: #6B7280;
    --shadow-soft: 0 10px 25px rgba(0, 0, 0, 0.05);
    --shadow-btn: 0 4px 14px rgba(125, 59, 186, 0.3);
}

body {
    font-family: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-page);
    color: var(--text-main);
    margin: 0;
    padding: 40px 20px;
    display: flex;
    justify-content: center;
    min-height: 100vh;
    box-sizing: border-box;
}

.container {
    width: 100%;
    max-width: 700px;
    background: var(--panel-bg);
    border-radius: 12px;
    box-shadow: var(--shadow-soft);
    overflow: hidden;
}

/* Hero Banner */
.header {
    background: linear-gradient(135deg, var(--ledtek-dark-bg) 0%, var(--ledtek-dark-bg-grad) 100%);
    text-align: center;
    padding: 40px 30px;
    color: white;
    border-bottom: 4px solid var(--ledtek-violet);
}

.header a {
    display: inline-block;
    transition: opacity 0.2s ease;
}

.header a:hover {
    opacity: 0.8;
}

.header img.logo {
    max-width: 220px;
    height: auto;
    margin-bottom: 15px;
    display: block;
    margin-left: auto;
    margin-right: auto;
}

.header p {
    color: #D8B4FE;
    margin: 0;
    font-size: 16px;
    letter-spacing: 1px;
    font-weight: 600;
}

.content-area {
    padding: 40px 30px;
}

/* Tabs */
.tabs {
    display: flex;
    margin-bottom: 30px;
    background: #F9FAFB;
    border-radius: 8px;
    padding: 6px;
    border: 1px solid var(--border-color);
}
.tab {
    flex: 1;
    text-align: center;
    padding: 12px;
    cursor: pointer;
    font-weight: 600;
    color: var(--text-muted);
    border-radius: 6px;
    transition: all 0.3s ease;
}
.tab:hover:not(.active) {
    background: #E5E7EB;
}
.tab.active {
    background: var(--ledtek-violet);
    color: #fff;
    box-shadow: 0 2px 8px rgba(125, 59, 186, 0.4);
}

/* Inputs */
.input-group { margin-bottom: 25px; }
label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    font-size: 14px;
    color: var(--text-main);
}
input[type="text"] {
    width: 100%;
    padding: 14px;
    background-color: #FFFFFF;
    color: var(--text-main);
    border: 2px solid var(--border-color);
    border-radius: 6px;
    box-sizing: border-box;
    font-size: 16px;
    transition: all 0.2s ease;
}
input[type="text"]:focus {
    outline: none;
    border-color: var(--ledtek-violet);
    box-shadow: 0 0 0 4px rgba(125, 59, 186, 0.1);
}

.section-title {
    font-size: 18px;
    color: var(--ledtek-dark-bg);
    margin-top: 35px;
    margin-bottom: 15px;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 10px;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.section-title svg { color: var(--ledtek-violet); }

/* Visual Grid for Tiles */
.module-visual {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    margin-bottom: 25px;
    aspect-ratio: 2 / 1;
}
.kachel {
    background-color: #F9FAFB;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    cursor: pointer;
    color: var(--text-muted);
    font-weight: 600;
    font-size: 14px;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
    padding: 15px;
}
.kachel:hover {
    background-color: #F3F4F6;
    border-color: #D1D5DB;
}
.kachel.selected {
    border-color: var(--ledtek-violet);
    background-color: rgba(125, 59, 186, 0.05);
    color: var(--ledtek-violet);
}
.kachel.selected::after {
    content: 'Austausch-Kachel';
    position: absolute;
    bottom: 8px;
    font-size: 11px;
    color: var(--ledtek-violet);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-weight: 700;
}

button {
    background: var(--ledtek-violet);
    color: white;
    border: none;
    padding: 18px 20px;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 700;
    font-size: 16px;
    width: 100%;
    transition: transform 0.2s, background 0.2s, box-shadow 0.2s;
    margin-top: 15px;
    letter-spacing: 0.5px;
    box-shadow: var(--shadow-btn);
}
button:hover {
    background: var(--ledtek-violet-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 18px rgba(125, 59, 186, 0.4);
}
button:active {
    transform: translateY(1px);
}

/* Results */
.result-box {
    margin-top: 35px;
    padding: 25px;
    border: 2px solid var(--ledtek-violet);
    background-color: #FFFFFF;
    border-radius: 8px;
    display: none;
    animation: fadeIn 0.4s ease-out;
    box-shadow: var(--shadow-btn);
}
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.result-box h3 {
    margin-top: 0;
    color: var(--ledtek-dark-bg);
    margin-bottom: 10px;
    font-size: 22px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.hidden { display: none !important; }

.batch-tag {
    display: inline-block;
    background: #E5E7EB;
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 12px;
    margin-left: 10px;
    color: var(--text-main);
    font-weight: 700;
    text-transform: uppercase;
}
.batch-tag.target {
    background: var(--ledtek-violet);
    color: white;
}

/* Result Matrix Styles */
.result-matrix {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
    margin-top: 20px;
}
.result-cell {
    background: #F9FAFB;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    display: flex;
    flex-direction: column;
    min-height: 120px;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
}
.result-cell.inactive {
    background: #FFFFFF;
    border-style: dashed;
    border-width: 2px;
    justify-content: center;
    align-items: center;
    text-align: center;
}
.cell-title {
    font-weight: 700;
    color: var(--ledtek-dark-bg);
    font-size: 14px;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 8px;
    margin-bottom: 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.compact-list {
    list-style: none;
    padding: 0;
    margin: 0;
    font-size: 13px;
    line-height: 2;
    font-family: monospace;
    color: var(--text-main);
}

/* Detailed List Design */
.detailed-list-container {
    background: #F9FAFB;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px 15px 15px 35px;
    margin: 0;
    line-height: 2;
    color: var(--text-main);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.02);
}