:root {
    --bg-main: #1A0F0A;
    --bg-panel: rgba(38, 20, 12, 0.7);
    --bg-input: rgba(10, 5, 3, 0.6);

    --primary: #E17055;
    --primary-hover: #D65A31;
    --primary-20: rgba(225, 112, 85, 0.2);

    --secondary: #FAB1A0;
    --accent: #0984E3;

    --text-main: #FDF3F0;
    --text-muted: #B39D96;
    --border: rgba(225, 112, 85, 0.2);

    --font-sans: 'Inter', system-ui, sans-serif;
    --font-mono: 'JetBrains Mono', monospace;

    --radius: 12px;
    --radius-sm: 6px;

    /* Tag Types Colors */
    --c-seq: #E17055;
    --c-set: #FAB1A0;
    --c-int: #0984E3;
    --c-str: #00B894;
    --c-oid: #FDCB6E;
    --c-bit: #D63031;
    --c-oth: #636E72;
}

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

body {
    font-family: var(--font-sans);
    background: var(--bg-main);
    color: var(--text-main);
    height: 100vh;
    overflow: hidden;
    font-size: 14px;
}

.app-layout {
    display: flex;
    height: 100%;
}

/* Sidebar */
.sidebar {
    width: 320px;
    display: flex;
    flex-direction: column;
    border-right: 1px solid var(--border);
    background: var(--bg-panel);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    z-index: 10;
}

.brand {
    padding: 1.25rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    border-bottom: 1px solid var(--border);
}

.brand h1 {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--primary);
}

.brand svg {
    color: var(--primary);
}

.sidebar-content {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    flex: 1;
    gap: 1.5rem;
    overflow-y: auto;
}

.input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-group label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-muted);
}

textarea {
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 1rem;
    color: var(--text-main);
    font-family: var(--font-mono);
    font-size: 0.8125rem;
    resize: none;
    height: 200px;
    outline: none;
    transition: all 0.2s;
}

textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-20);
}

.mt-1 {
    margin-top: 0.25rem;
}

.mt-auto {
    margin-top: auto;
}

.full-width {
    width: 100%;
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1rem;
    border-radius: var(--radius-sm);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    border: 1px solid transparent;
    font-family: var(--font-sans);
}

.btn.primary {
    background: var(--primary);
    color: #fff;
}

.btn.primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--primary-20);
}

.btn.ghost {
    background: transparent;
    color: var(--text-muted);
    border-color: rgba(255, 255, 255, 0.1);
}

.btn.ghost:hover {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-main);
}

.text-sm {
    font-size: 0.8125rem;
}

.info-card {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
    padding: 1rem;
}

.info-card h3 {
    font-size: 0.75rem;
    color: var(--secondary);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

.info-card p {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

/* Workspace */
.workspace {
    flex: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
    position: relative;
}

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
    border-bottom: 1px solid var(--border);
    background: var(--bg-main);
}

.stats {
    font-size: 0.875rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
}

.tree-container {
    flex: 1;
    overflow: auto;
    padding: 1.5rem;
    position: relative;
}

/* Scrollbar */
.custom-scroll::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

.custom-scroll::-webkit-scrollbar-track {
    background: transparent;
}

.custom-scroll::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 4px;
}

.custom-scroll::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Empty State */
.empty-state {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    color: var(--text-muted);
}

.icon-pulse {
    color: var(--primary);
    opacity: 0.5;
    animation: pulse 2s infinite ease-in-out;
}

@keyframes pulse {
    0% {
        transform: scale(1);
        opacity: 0.5;
    }

    50% {
        transform: scale(1.1);
        opacity: 0.8;
    }

    100% {
        transform: scale(1);
        opacity: 0.5;
    }
}

/* ASN.1 Tree Nodes */
.asn1-node {
    display: flex;
    flex-direction: column;
    font-family: var(--font-mono);
    font-size: 0.875rem;
    margin-left: 1rem;
    border-left: 1px solid rgba(255, 255, 255, 0.05);
}

.asn1-header {
    display: flex;
    align-items: center;
    padding: 0.35rem 0.5rem;
    gap: 0.75rem;
    cursor: pointer;
    border-radius: 4px;
    transition: background 0.15s;
    position: relative;
}

.asn1-header:hover {
    background: rgba(255, 255, 255, 0.03);
}

.asn1-toggle {
    width: 16px;
    height: 16px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-muted);
    transition: transform 0.2s;
}

.asn1-node.expanded>.asn1-header .asn1-toggle {
    transform: rotate(90deg);
}

.asn1-tag {
    font-weight: 700;
    min-width: 100px;
}

.asn1-tag.c-seq {
    color: var(--c-seq);
}

.asn1-tag.c-set {
    color: var(--c-set);
}

.asn1-tag.c-int {
    color: var(--c-int);
}

.asn1-tag.c-str {
    color: var(--c-str);
}

.asn1-tag.c-oid {
    color: var(--c-oid);
}

.asn1-tag.c-bit {
    color: var(--c-bit);
}

.asn1-tag.c-oth {
    color: var(--c-oth);
}

.asn1-len {
    color: var(--text-muted);
    font-size: 0.75rem;
    font-style: italic;
}

.asn1-val {
    color: var(--text-main);
    word-break: break-all;
    margin-left: auto;
    max-width: 50%;
    opacity: 0.9;
}

.asn1-children {
    display: none;
    margin-left: 0.5rem;
    padding-left: 0.5rem;
}

.asn1-node.expanded>.asn1-children {
    display: flex;
    flex-direction: column;
}

.asn1-header.selected {
    background: var(--primary-20);
    border-left: 2px solid var(--primary);
}

/* Inspector */
.inspector-panel {
    height: 200px;
    border-top: 1px solid var(--border);
    background: var(--bg-panel);
    display: flex;
    flex-direction: column;
}

.inspector-header {
    padding: 0.5rem 1rem;
    background: rgba(0, 0, 0, 0.3);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 1rem;
}

.inspector-header h3 {
    font-size: 0.75rem;
    text-transform: uppercase;
    color: var(--accent);
}

.inspector-header code {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.inspector-body {
    flex: 1;
    padding: 1rem;
    overflow-y: auto;
    font-family: var(--font-mono);
    font-size: 0.8125rem;
}

.hex-dump {
    display: grid;
    grid-template-columns: min-content 1fr min-content;
    gap: 1.5rem;
    color: var(--text-main);
}

.hex-offset {
    color: var(--text-muted);
    user-select: none;
}

.hex-bytes {
    color: var(--secondary);
    letter-spacing: 0.25em;
    word-spacing: 0.5em;
}

.hex-ascii {
    color: var(--text-main);
    white-space: pre;
}