:root {
    --primary-green: #2ecc71;
    --primary-blue: #3498db;
    --primary-purple: #9b59b6;
    --primary-orange: #e67e22;
    --gradient-green: linear-gradient(135deg, #2ecc71 0%, #27ae60 100%);
    --gradient-blue: linear-gradient(135deg, #3498db 0%, #2980b9 100%);
    --gradient-purple: linear-gradient(135deg, #9b59b6 0%, #8e44ad 100%);
    --guide-green: rgba(46, 204, 113, 0.3);
    --bg-dark: #0a0a0a;
    --card-bg: rgba(26, 26, 26, 0.6);
    --card-border: rgba(255, 255, 255, 0.08);
    --text-main: #fcfcfc;
    --text-dim: #a0a0a0;
    --input-bg: rgba(34, 34, 34, 0.8);
    --theme-color: var(--primary-green);
    --theme-bg: rgba(46, 204, 113, 0.1);
}

body {
    background-color: var(--bg-dark);
    color: var(--text-main);
    font-family: 'Montserrat', sans-serif;
    margin: 0;
    padding: 40px 20px;
    display: flex;
    justify-content: center;
}

.container {
    max-width: 800px;
    width: 100%;
}

header {
    text-align: center;
    margin-bottom: 30px;
}

h1 {
    font-weight: 900;
    font-size: 2.5rem;
    letter-spacing: -1px;
    margin: 0;
    text-transform: uppercase;
}

.accent { color: var(--theme-color); }

/* Navigation */
.category-nav {
    display: flex;
    justify-content: center;
    gap: 30px;
    margin-bottom: 20px;
    border-bottom: 1px solid var(--card-border);
    padding-bottom: 15px;
}

.cat-btn {
    background: transparent;
    border: none;
    color: var(--text-dim);
    font-family: 'Montserrat', sans-serif;
    font-weight: 900;
    font-size: 1.1rem;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 2px;
    transition: all 0.3s ease;
    padding: 5px 10px;
    position: relative;
}

.cat-btn:hover {
    color: var(--text-main);
}

.cat-btn.active {
    color: var(--theme-color);
}

.cat-btn.active::after {
    content: '';
    position: absolute;
    bottom: -16px;
    left: 0;
    width: 100%;
    height: 3px;
    background: var(--theme-color);
    box-shadow: 0 0 10px var(--theme-color);
    transition: all 0.3s ease;
}

.tool-nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    margin-bottom: 30px;
    min-height: 45px; /* Prevent jumpy layout when empty */
}

.nav-btn {
    display: none; /* Hidden by default, main.js will show relevant ones */
    background: var(--input-bg);
    color: var(--text-dim);
    border: 1px solid var(--card-border);
    padding: 12px 24px;
    border-radius: 30px;
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    text-transform: uppercase;
    letter-spacing: 1px;
    backdrop-filter: blur(10px);
}

.nav-btn:hover {
    color: var(--text-main);
    background: rgba(255,255,255,0.05);
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

.nav-btn.active {
    background: var(--theme-bg);
    color: var(--text-main);
    border-color: var(--theme-color);
    box-shadow: 0 0 15px var(--theme-bg);
}

/* Tool Sections */
.tool-section {
    display: none;
    animation: fadeIn 0.4s ease-in-out;
}

.tool-section.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}
.config-card {
    background: var(--card-bg);
    border-radius: 24px;
    padding: 40px;
    box-shadow: 0 20px 50px rgba(0,0,0,0.6), inset 0 1px 0 rgba(255,255,255,0.05);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
}

.group-box {
    margin-bottom: 25px;
    padding: 20px;
    background: #222;
    border-radius: 12px;
    border: 1px solid #333;
}

.input-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 20px;
    margin-bottom: 20px;
}

.checkbox-container {
    margin-bottom: 30px;
    display: flex;
    align-items: center;
    gap: 12px;
    background: var(--input-bg);
    padding: 15px;
    border-radius: 12px;
    cursor: pointer;
    border: 1px solid var(--card-border);
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
}

.checkbox-container:hover { 
    background: rgba(255,255,255,0.05);
    transform: translateY(-1px);
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
}
.checkbox-container input { width: 18px; height: 18px; cursor: pointer; accent-color: var(--theme-color); }

label.field-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-dim);
    margin-bottom: 8px;
    letter-spacing: 1px;
}

select, input[type="number"], input[type="text"], input[type="email"], textarea {
    width: 100%;
    padding: 15px;
    background: var(--input-bg);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    color: var(--text-main);
    font-family: inherit;
    font-size: 1rem;
    box-sizing: border-box;
    transition: all 0.3s ease;
}

select:focus, input:focus {
    outline: none;
    border-color: #555;
}

#proj-model-search {
    margin-bottom: 0;
}

/* Custom Search Results Dropdown */
.search-container {
    position: relative;
    width: 100%;
}

.search-results {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: #151515;
    border: 1px solid var(--card-border);
    border-radius: 10px;
    margin-top: 5px;
    max-height: 250px;
    overflow-y: auto;
    z-index: 1000;
    box-shadow: 0 10px 40px rgba(0,0,0,0.8);
    display: none;
    backdrop-filter: blur(15px);
}

.search-item {
    padding: 12px 15px;
    cursor: pointer;
    border-bottom: 1px solid #222;
    font-size: 0.9rem;
    transition: all 0.2s;
    color: var(--text-main);
}

.search-item:last-child { border-bottom: none; }

.search-item:hover {
    background: #2a2a2a;
    color: var(--theme-color);
    padding-left: 20px;
}

.search-item strong {
    color: var(--text-dim);
    font-size: 0.75rem;
    margin-right: 8px;
    text-transform: uppercase;
}

/* Preview Area (LED) */
.preview-window {
    background: #000;
    height: 380px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    border: 1px solid #222;
    position: relative;
    overflow: hidden;
}

.ratio-guide {
    position: absolute;
    border: 2px dashed var(--guide-green);
    box-sizing: border-box;
    z-index: 1;
    pointer-events: none;
    display: none;
}

.ratio-guide::after {
    content: "16:9 RATIO GUIDE";
    position: absolute;
    bottom: -22px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 0.65rem;
    color: var(--guide-green);
    letter-spacing: 1px;
    font-weight: 700;
    white-space: nowrap;
}

#screen-box {
    background: #111;
    border: 2px solid #444;
    box-shadow: 0 0 30px rgba(0,0,0,0.5);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    text-align: center;
    z-index: 2;
    position: relative;
}

.screen-info-px { 
    font-weight: 700; 
    font-size: 1.4rem; 
    text-shadow: 0 0 10px rgba(0, 0, 0, 0.9); 
    z-index: 10;
}

.screen-info-m { 
    color: var(--theme-color); 
    font-size: 0.9rem; 
    margin-top: 5px; 
    text-shadow: 0 0 10px rgba(0, 0, 0, 0.9);
    z-index: 10;
}

/* Preview Area (Projector) */
.proj-preview {
    background: #000;
    padding: 40px 20px;
    border-radius: 12px;
    margin-bottom: 30px;
    border: 1px solid #222;
    text-align: center;
}

.distance-display {
    font-size: 3rem;
    font-weight: 900;
    color: var(--theme-color);
    margin: 10px 0;
}

/* Results */
.results-list { border-top: 1px solid #333; padding-top: 10px; }
.res-item { display: flex; justify-content: space-between; padding: 12px 0; border-bottom: 1px solid #222; }
.res-label { color: var(--text-dim); font-size: 0.9rem; }
.res-value { font-weight: 700; }
.power-info { color: #e74c3c; font-size: 0.75rem; display: block; margin-top: 2px; }

@media (max-width: 650px) { .tool-nav { flex-direction: column; } }

.download-btn {
    width: 100%; margin-bottom: 30px; background: transparent; border: 2px solid var(--theme-color);
    color: var(--theme-color); padding: 15px; border-radius: 10px; font-weight: 700;
    text-transform: uppercase; cursor: pointer; transition: all 0.3s ease;
}
.download-btn:hover { background: var(--theme-color); color: var(--bg-dark); }

/* DIP Switch Tool Styles */
.dip-block {
    background: #0047AB; /* Classic DIP blue */
    padding: 20px 30px 15px 30px;
    border-radius: 4px;
    border: 3px solid #003380;
    position: relative;
    box-shadow: 0 10px 30px rgba(0,0,0,0.5), inset 0 2px 2px rgba(255,255,255,0.2);
    display: inline-block;
    transition: transform 0.4s ease;
}

.dip-case-label-on {
    position: absolute;
    top: 5px;
    left: 8px;
    color: white;
    font-size: 0.6rem;
    font-weight: 900;
    opacity: 0.9;
}

.dip-switches-inner {
    display: flex;
    gap: 12px;
}

.dip-switch {
    display: flex;
    flex-direction: column;
    align-items: center;
    cursor: pointer;
    position: relative;
}

/* The arrow pointing to ON */
.dip-switch::before {
    content: "▲";
    color: white;
    font-size: 0.5rem;
    margin-bottom: 4px;
    opacity: 0.7;
}

.dip-track {
    width: 20px;
    height: 50px;
    background: #002d6b; /* Darker blue recessed area */
    border-radius: 2px;
    position: relative;
    box-shadow: inset 0 2px 5px rgba(0,0,0,0.6);
}

.dip-slider {
    width: 14px;
    height: 18px;
    background: #f0f0f0;
    border-radius: 2px;
    position: absolute;
    left: 2px;
    bottom: 2px;
    transition: all 0.15s ease;
    box-shadow: 0 2px 4px rgba(0,0,0,0.4);
    border: 1px solid #ccc;
}

.dip-switch.on .dip-slider {
    bottom: 28px;
    background: #fff;
    box-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

.dip-label {
    font-size: 0.7rem;
    font-weight: 700;
    color: white;
    margin-top: 8px;
    opacity: 0.9;
}

.dip-val {
    display: none; /* Hide numerical values to match the clean look of the photo */
}

/* Floating Feedback Button */
.floating-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 2000;
    background: rgba(46, 204, 113, 0.2);
    color: var(--primary-green);
    border: 2px solid var(--primary-green);
    padding: 15px 25px;
    border-radius: 50px;
    font-family: 'Montserrat', sans-serif;
    font-weight: 700;
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.4s cubic-bezier(0.25, 0.8, 0.25, 1);
    text-transform: uppercase;
    letter-spacing: 1px;
    backdrop-filter: blur(10px);
    box-shadow: 0 0 15px rgba(46, 204, 113, 0.2);
}

.floating-btn:hover {
    background: var(--primary-green);
    color: var(--bg-dark);
    transform: translateY(-5px);
    box-shadow: 0 10px 25px rgba(46, 204, 113, 0.4);
}

/* Footer Links */
.footer-links {
    position: fixed;
    bottom: 30px;
    left: 30px;
    z-index: 2000;
}

.text-link {
    background: transparent;
    border: none;
    color: var(--text-dim);
    font-family: 'Montserrat', sans-serif;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    cursor: pointer;
    padding: 10px;
    transition: color 0.2s;
}

.text-link:hover {
    color: var(--theme-color);
    text-decoration: underline;
}

.copyright {
    color: var(--text-dim);
    font-family: 'Montserrat', sans-serif;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 5px;
    padding-left: 10px;
}

.copyright a {
    color: var(--theme-color);
    text-decoration: none;
    font-weight: 700;
    transition: opacity 0.2s;
}

.copyright a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

/* Modal Overlay & Content */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.2);
    backdrop-filter: blur(8px);
    z-index: 3000;
    display: none;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    display: flex;
    opacity: 1;
}

.modal-content {
    background: var(--card-bg);
    padding: 40px;
    border-radius: 24px;
    width: 90%;
    max-width: 500px;
    position: relative;
    border: 1px solid var(--card-border);
    box-shadow: 0 20px 50px rgba(0,0,0,0.6);
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.modal-overlay.active .modal-content {
    transform: translateY(0);
}

.modal-close-btn {
    position: absolute;
    top: 20px;
    right: 20px;
    background: transparent;
    border: none;
    color: var(--text-dim);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.2s;
}

.modal-close-btn:hover {
    color: var(--text-main);
}

/* Reference Library — Pinout Viewer */
:root {
    --primary-teal: #1abc9c;
}

.ref-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
}

.ref-table th {
    text-align: left;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--text-dim);
    padding: 8px 12px 12px;
    border-bottom: 2px solid #333;
}

.ref-table td {
    padding: 10px 12px;
    border-bottom: 1px solid #2a2a2a;
    vertical-align: middle;
    color: var(--text-main);
    line-height: 1.4;
}

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

.ref-table tr:hover td { background: rgba(255,255,255,0.03); }

.pin-num-cell {
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
}

.pin-color-swatch {
    display: inline-block;
    width: 10px;
    height: 10px;
    border-radius: 50%;
    flex-shrink: 0;
}

.pin-wire-label {
    display: block;
    font-size: 0.7rem;
    color: var(--text-dim);
    margin-top: 2px;
}

/* Project Name in Preview */
.preview-project-name {
    position: absolute;
    bottom: 5px;
    right: 10px;
    color: #888888;
    font-size: 0.8rem;
    font-weight: 400; /* Not bold, same as in PNG */
    z-index: 10;
    pointer-events: none;
    /* Removed uppercase to match exactly with the file */
}