/* =========================================================================
   CFG Visualizer — NOCTURNE theme
   Dark, high-contrast, subtle glow. Enterprise security aesthetic, not
   neon/gamer. Off-black background, cool blue accents, monospace where it
   matters, plenty of breathing room.
   ========================================================================= */

:root {
    --bg-0: #050810;        /* deepest */
    --bg-1: #0a1018;        /* panels */
    --bg-2: #111a26;        /* elevated */
    --bg-3: #1a2433;        /* hover */
    --line: #1f2a3a;        /* dividers */
    --line-strong: #2a3a52;
    --ink-0: #e6edf6;       /* primary text */
    --ink-1: #aab6c8;       /* secondary */
    --ink-2: #6a7a8e;       /* tertiary */
    --ink-3: #455065;       /* muted */
    --accent: #4a9eff;      /* primary blue */
    --accent-dim: #2c6db5;
    --green: #4ade80;
    --red: #f87171;
    --amber: #f0a040;
    --purple: #b366ff;
    --pink: #ff5577;
    --shadow-1: 0 1px 2px rgba(0, 0, 0, 0.4);
    --shadow-2: 0 8px 24px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 24px rgba(74, 158, 255, 0.12);
    --mono: 'JetBrains Mono', 'Fira Code', 'SFMono-Regular', Consolas, 'Liberation Mono', monospace;
    --sans: -apple-system, BlinkMacSystemFont, 'Inter', 'Segoe UI', Roboto, sans-serif;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    background: var(--bg-0);
    color: var(--ink-0);
    font-family: var(--sans);
    font-size: 14px;
    overflow: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    display: flex;
    flex-direction: column;
}

.hidden { display: none !important; }

/* --- Topbar --------------------------------------------------------------- */

.topbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 20px;
    height: 52px;
    background: linear-gradient(180deg, var(--bg-1) 0%, var(--bg-0) 100%);
    border-bottom: 1px solid var(--line);
    flex-shrink: 0;
    z-index: 10;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo {
    width: 26px;
    height: 26px;
    color: var(--accent);
    filter: drop-shadow(0 0 6px rgba(74, 158, 255, 0.3));
}

.brand-name {
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 0.4px;
    color: var(--ink-0);
}

.brand-sub {
    font-size: 12px;
    color: var(--ink-2);
    margin-left: 4px;
    padding-left: 12px;
    border-left: 1px solid var(--line);
}

@media (max-width: 720px) {
    .brand-sub { display: none; }
}

.topbar-actions {
    display: flex;
    gap: 8px;
}

.btn {
    background: var(--bg-2);
    color: var(--ink-0);
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 6px 12px;
    font-size: 12px;
    font-weight: 500;
    font-family: var(--sans);
    cursor: pointer;
    transition: background 120ms ease, border-color 120ms ease, transform 80ms ease;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}

.btn:hover {
    background: var(--bg-3);
    border-color: var(--line-strong);
}

.btn:active {
    transform: translateY(1px);
}

.btn-ghost {
    background: transparent;
    color: var(--ink-1);
}

.btn-ghost:hover {
    color: var(--ink-0);
    background: var(--bg-2);
}

/* --- Layout --------------------------------------------------------------- */

.layout {
    display: grid;
    grid-template-columns: 300px 1fr;
    flex: 1;
    min-height: 0;
    position: relative;
}

.sidebar {
    background: var(--bg-1);
    border-right: 1px solid var(--line);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    min-height: 0;
}

.canvas-wrap {
    position: relative;
    background: radial-gradient(ellipse at center, #0a1220 0%, var(--bg-0) 70%);
    overflow: hidden;
    min-height: 0;
}

#graphCanvas {
    width: 100%;
    height: 100%;
    display: block;
    cursor: grab;
}

#graphCanvas:active { cursor: grabbing; }

/* --- Dropzone ------------------------------------------------------------- */

.dropzone {
    margin: 16px;
    border: 1.5px dashed var(--line-strong);
    border-radius: 10px;
    background: linear-gradient(180deg, rgba(74, 158, 255, 0.02) 0%, transparent 100%);
    padding: 32px 16px;
    text-align: center;
    cursor: pointer;
    transition: border-color 160ms ease, background 160ms ease, transform 120ms ease;
}

.dropzone:hover, .dropzone:focus {
    border-color: var(--accent-dim);
    background: linear-gradient(180deg, rgba(74, 158, 255, 0.05) 0%, transparent 100%);
    outline: none;
}

.dropzone.dragover {
    border-color: var(--accent);
    background: linear-gradient(180deg, rgba(74, 158, 255, 0.1) 0%, transparent 100%);
    transform: scale(1.01);
}

.dropzone-icon {
    width: 32px;
    height: 32px;
    color: var(--ink-2);
    margin-bottom: 12px;
    transition: color 160ms ease;
}

.dropzone:hover .dropzone-icon,
.dropzone.dragover .dropzone-icon {
    color: var(--accent);
}

.dropzone-title {
    font-size: 14px;
    font-weight: 500;
    color: var(--ink-0);
    margin-bottom: 4px;
}

.dropzone-sub {
    font-size: 12px;
    color: var(--ink-2);
}

/* --- Panels (function list, overview) ------------------------------------- */

.panel {
    display: flex;
    flex-direction: column;
    border-top: 1px solid var(--line);
    min-height: 0;
}

.panel:first-of-type {
    border-top: none;
    flex: 1;
}

.panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px 8px;
}

.panel-header h2 {
    margin: 0;
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--ink-2);
}

.badge {
    font-size: 11px;
    font-weight: 600;
    color: var(--ink-1);
    background: var(--bg-2);
    padding: 2px 8px;
    border-radius: 10px;
    border: 1px solid var(--line);
}

#funcSearch {
    margin: 0 16px 8px;
    padding: 8px 10px;
    background: var(--bg-0);
    border: 1px solid var(--line);
    border-radius: 6px;
    color: var(--ink-0);
    font-family: var(--mono);
    font-size: 12px;
    outline: none;
    transition: border-color 120ms ease;
}

#funcSearch:focus {
    border-color: var(--accent-dim);
}

.function-list {
    list-style: none;
    margin: 0;
    padding: 4px 8px 12px;
    overflow-y: auto;
    flex: 1;
    min-height: 0;
}

.function-list li {
    padding: 8px 10px;
    margin: 2px 0;
    border-radius: 5px;
    cursor: pointer;
    transition: background 100ms ease, color 100ms ease;
    display: flex;
    flex-direction: column;
    gap: 2px;
    border-left: 2px solid transparent;
}

.function-list li:hover {
    background: var(--bg-2);
    border-left-color: var(--line-strong);
}

.function-list li.active {
    background: var(--bg-2);
    border-left-color: var(--accent);
}

.function-list .fn-name {
    font-family: var(--mono);
    font-size: 12px;
    color: var(--ink-0);
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.function-list .fn-meta {
    font-family: var(--mono);
    font-size: 10px;
    color: var(--ink-2);
}

.function-list::-webkit-scrollbar { width: 6px; }
.function-list::-webkit-scrollbar-track { background: transparent; }
.function-list::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 3px; }

.overview-hint {
    padding: 8px 16px 16px;
    color: var(--ink-2);
    font-size: 12px;
}

/* --- Empty state ---------------------------------------------------------- */

.empty-state {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 40px;
    pointer-events: none;
    z-index: 5;
}

.empty-state.has-graph { display: none; }

.empty-state-inner {
    max-width: 520px;
}

.empty-state h1 {
    font-size: 24px;
    font-weight: 600;
    color: var(--ink-0);
    margin: 0 0 16px;
    letter-spacing: -0.5px;
}

.empty-state p {
    font-size: 14px;
    line-height: 1.6;
    color: var(--ink-1);
    margin: 0 0 12px;
}

.empty-state-sub {
    color: var(--ink-2) !important;
    font-size: 13px !important;
}

.empty-state a {
    color: var(--accent);
    text-decoration: none;
    border-bottom: 1px dotted var(--accent-dim);
    pointer-events: auto;
}

.empty-state a:hover {
    color: var(--ink-0);
    border-bottom-color: var(--accent);
}

/* --- Status bar / legend -------------------------------------------------- */

.status-bar {
    position: absolute;
    bottom: 12px;
    left: 12px;
    background: rgba(10, 16, 24, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 6px 12px;
    font-family: var(--mono);
    font-size: 11px;
    color: var(--ink-1);
    z-index: 6;
    display: flex;
    align-items: center;
    gap: 8px;
}

.status-sep { color: var(--ink-3); }

#statusFunction { color: var(--ink-0); }

.legend {
    position: absolute;
    bottom: 12px;
    right: 12px;
    background: rgba(10, 16, 24, 0.85);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--line);
    border-radius: 6px;
    padding: 8px 12px;
    z-index: 6;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.legend-item {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--mono);
    font-size: 11px;
    color: var(--ink-1);
}

.legend .dot {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 6px currentColor;
}

/* --- Disassembly side panel ---------------------------------------------- */

.disasm-panel {
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 420px;
    max-width: 50vw;
    background: var(--bg-1);
    border-left: 1px solid var(--line);
    display: flex;
    flex-direction: column;
    z-index: 8;
    box-shadow: var(--shadow-2);
    transform: translateX(100%);
    transition: transform 280ms cubic-bezier(0.16, 1, 0.3, 1);
}

.disasm-panel.open {
    transform: translateX(0);
}

.disasm-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--line);
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
}

.disasm-addr {
    font-family: var(--mono);
    font-size: 15px;
    color: var(--ink-0);
    font-weight: 600;
    margin-bottom: 4px;
}

.disasm-type {
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--ink-2);
}

.icon-btn {
    background: transparent;
    border: 1px solid var(--line);
    border-radius: 5px;
    color: var(--ink-1);
    width: 28px;
    height: 28px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 120ms ease;
    padding: 0;
}

.icon-btn:hover {
    color: var(--ink-0);
    background: var(--bg-2);
    border-color: var(--line-strong);
}

.icon-btn svg { width: 16px; height: 16px; }

.disasm-body {
    margin: 0;
    padding: 16px 20px;
    overflow-y: auto;
    font-family: var(--mono);
    font-size: 12px;
    line-height: 1.7;
    color: var(--ink-1);
    flex: 1;
    white-space: pre;
    tab-size: 4;
}

.disasm-body::-webkit-scrollbar { width: 6px; }
.disasm-body::-webkit-scrollbar-track { background: transparent; }
.disasm-body::-webkit-scrollbar-thumb { background: var(--line-strong); border-radius: 3px; }

/* Disassembly line color cues */
.disasm-body .asm-mnemonic { color: var(--accent); }
.disasm-body .asm-jump     { color: var(--amber); }
.disasm-body .asm-call     { color: var(--purple); }
.disasm-body .asm-ret      { color: var(--pink); }
.disasm-body .asm-reg      { color: var(--green); }
.disasm-body .asm-imm      { color: var(--ink-2); }
.disasm-body .asm-comment  { color: var(--ink-3); font-style: italic; }

/* --- Toast ---------------------------------------------------------------- */

.toast {
    position: absolute;
    top: 16px;
    left: 50%;
    transform: translateX(-50%) translateY(-12px);
    background: var(--bg-2);
    border: 1px solid var(--line-strong);
    color: var(--ink-0);
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 12px;
    z-index: 20;
    opacity: 0;
    transition: opacity 200ms ease, transform 200ms ease;
    pointer-events: none;
    max-width: 80%;
    text-align: center;
}

.toast.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

.toast.toast-error { border-color: var(--red); color: var(--red); }
.toast.toast-success { border-color: var(--green); color: var(--green); }

/* --- Loading -------------------------------------------------------------- */

.loading {
    position: fixed;
    inset: 0;
    background: rgba(5, 8, 16, 0.85);
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
    z-index: 100;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 16px;
}

.loading-spinner {
    width: 32px;
    height: 32px;
    border: 2px solid var(--line);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 800ms linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading-text {
    color: var(--ink-1);
    font-size: 13px;
    font-family: var(--mono);
}

/* --- Responsive ----------------------------------------------------------- */

@media (max-width: 900px) {
    .layout { grid-template-columns: 240px 1fr; }
    .disasm-panel { width: 80vw; }
    .empty-state h1 { font-size: 20px; }
}