:root {
    --bg-color: #121826;
    --primary-color: #1F2937;
    --secondary-color: #374151;
    --accent-color: #38BDF8;
    --text-color: #E5E7EB;
    --text-muted-color: #9CA3AF;
    --success-color: #10B981;
    --error-color: #F87171;
    --tlp-header-color: #818CF8;
    --tlp-data-color: #F472B6;
    --tlp-digest-color: #FBBF24;
    --font-primary: 'Poppins', sans-serif;
    --font-mono: 'Roboto Mono', monospace;
}

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

body {
    font-family: var(--font-primary);
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
}

header {
    text-align: center;
    padding: 2rem 1rem;
    border-bottom: 1px solid var(--secondary-color);
}

header h1 {
    font-size: 2.5rem;
    color: var(--accent-color);
    font-weight: 600;
}

header p {
    color: var(--text-muted-color);
    font-size: 1.1rem;
}

main {
    max-width: 1200px;
    margin: 2rem auto;
    padding: 0 1rem;
}

.controls {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    align-items: flex-end;
    gap: 1.5rem;
    padding: 2rem;
    background-color: var(--primary-color);
    border-radius: 12px;
    margin-bottom: 2rem;
}

.control-row {
    display: contents; /* Allows grouping without affecting flex layout */
}

.control-group {
    display: flex;
    flex-direction: column;
}

.control-group label {
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-muted-color);
    font-weight: 600;
}

select, input[type="text"] {
    background-color: var(--secondary-color);
    border: 1px solid #4B5563;
    color: var(--text-color);
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-family: var(--font-mono);
    font-size: 1rem;
    min-width: 200px;
    transition: all 0.2s ease;
}

select:focus, input[type="text"]:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.3);
}

.data-input-group {
    flex-grow: 1;
}

#data-input, #pcie-data, #pcie-address {
    width: 100%;
}

button#generate-btn {
    background: linear-gradient(90deg, #38BDF8, #0EA5E9);
    color: white;
    border: none;
    padding: 0.75rem 2rem;
    border-radius: 8px;
    font-family: var(--font-primary);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
}

button#generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 15px rgba(56, 189, 248, 0.2);
}

.toggle-switch {
    position: relative;
    width: 180px;
    height: 48px;
}
.toggle-input {
    display: none;
}
.toggle-label {
    display: flex;
    align-items: center;
    justify-content: space-around;
    width: 100%;
    height: 100%;
    background-color: var(--secondary-color);
    border-radius: 8px;
    cursor: pointer;
    position: relative;
    transition: background-color 0.3s ease;
}
.toggle-text {
    color: var(--text-muted-color);
    font-weight: 600;
    z-index: 2;
    transition: color 0.3s ease;
}
.toggle-label::before {
    content: '';
    position: absolute;
    width: 50%;
    height: 90%;
    top: 5%;
    left: 2.5%;
    background-color: var(--accent-color);
    border-radius: 6px;
    transition: transform 0.3s ease;
    z-index: 1;
}
.toggle-input:checked + .toggle-label::before {
    transform: translateX(95%);
}
.toggle-input:checked + .toggle-label .left {
    color: var(--text-muted-color);
}
.toggle-input:checked + .toggle-label .right {
    color: white;
}
.toggle-input:not(:checked) + .toggle-label .left {
    color: white;
}

/* Display Containers */
.display-container {
    background-color: var(--primary-color);
    padding: 2rem;
    border-radius: 12px;
    min-height: 400px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

#waveformCanvas {
    background-color: #0c101a;
    border-radius: 8px;
    width: 100%;
    height: auto;
}

#placeholder-text {
    text-align: center;
    color: var(--text-muted-color);
}

#placeholder-text h2 {
    color: var(--text-color);
}

.hidden {
    display: none !important;
}

#error-message {
    background-color: rgba(248, 113, 113, 0.1);
    color: var(--error-color);
    padding: 1rem 2rem;
    border: 1px solid var(--error-color);
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: 600;
}

/* TLP Specific Styles */
#pcie-display h3 {
    margin-bottom: 2rem;
}

#tlp-container {
    display: flex;
    flex-wrap: wrap;
    font-family: var(--font-mono);
    width: 100%;
    border: 1px solid var(--secondary-color);
    border-radius: 8px;
    overflow: hidden;
}

.tlp-dword {
    width: 100%;
    display: flex;
    border-bottom: 1px solid var(--secondary-color);
}
.tlp-dword:last-child {
    border-bottom: none;
}

.tlp-field {
    padding: 1rem;
    text-align: center;
    position: relative;
    border-right: 1px solid var(--secondary-color);
}
.tlp-field:last-child {
    border-right: none;
}

.tlp-field .label {
    font-size: 0.75rem;
    color: var(--text-muted-color);
    display: block;
    margin-bottom: 0.5rem;
}
.tlp-field .value {
    font-size: 1.25rem;
    font-weight: 700;
}

.field-header { background-color: rgba(129, 140, 248, 0.1); color: var(--tlp-header-color); }
.field-data { background-color: rgba(244, 114, 182, 0.1); color: var(--tlp-data-color); }
.field-digest { background-color: rgba(251, 191, 36, 0.1); color: var(--tlp-digest-color); }

.tlp-note {
    margin-top: 1rem;
    font-size: 0.9rem;
    color: var(--text-muted-color);
}


/* Info and Footer */
.info-section {
    margin-top: 3rem;
    padding: 2rem;
    background-color: var(--primary-color);
    border-radius: 12px;
    color: var(--text-muted-color);
}
.info-section h3 {
    color: var(--text-color);
    margin-bottom: 1rem;
}

footer {
    text-align: center;
    padding: 2rem 1rem;
    margin-top: 2rem;
    color: var(--text-muted-color);
    font-size: 0.9rem;
}