/* ── HNM Labs App — Dark Dashboard CSS ──────────────────────────── */

:root {
    --bg:          #0d0e10;
    --surface:     #161a1e;
    --surface-2:   #1e2329;
    --surface-3:   #262d35;
    --border:      rgba(255,255,255,0.07);
    --border-med:  rgba(255,255,255,0.12);
    --text:        #e8eaed;
    --text-soft:   #8a9ab0;
    --text-muted:  #566070;
    --accent:      #35a7ff;
    --accent-dim:  rgba(53,167,255,0.14);
    --green:       #b6e34b;
    --green-dim:   rgba(182,227,75,0.14);
    --coral:       #ff6b5f;
    --coral-dim:   rgba(255,107,95,0.14);
    --amber:       #ffbb55;
    --amber-dim:   rgba(255,187,85,0.14);
    --purple:      #a78bfa;
    --purple-dim:  rgba(167,139,250,0.14);
    --sidebar-w:   256px;
    --topbar-h:    60px;
    --radius:      14px;
    --radius-lg:   20px;
    --shadow:      0 4px 24px rgba(0,0,0,0.35);
    --transition:  0.2s ease;
}

*,*::before,*::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: "Instrument Sans", sans-serif;
    font-size: 15px;
    line-height: 1.6;
    min-height: 100vh;
}

h1,h2,h3,h4,strong { font-family: "Space Grotesk", sans-serif; letter-spacing: -0.03em; }
h1,h2,h3,h4,p { margin-top: 0; }
a { color: inherit; text-decoration: none; }
button,input,select,textarea { font: inherit; }
img { display: block; max-width: 100%; }

/* ── Layout ─────────────────────────────────────────────────────── */

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

/* ── Sidebar ────────────────────────────────────────────────────── */

.app-sidebar {
    width: var(--sidebar-w);
    flex-shrink: 0;
    background: var(--surface);
    border-right: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    position: fixed;
    top: 0; left: 0; bottom: 0;
    z-index: 100;
    overflow-y: auto;
    transition: transform var(--transition);
}

.sidebar-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 18px 16px;
    border-bottom: 1px solid var(--border);
    flex-shrink: 0;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--text);
}

.sidebar-logo {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    object-fit: contain;
    background: var(--surface-2);
    padding: 3px;
}

.sidebar-brand-text strong { display: block; font-size: 14px; line-height: 1.2; }
.sidebar-brand-text small  { display: block; font-size: 11px; color: var(--text-soft); letter-spacing: 0; }

.sidebar-close {
    display: none;
    background: none;
    border: none;
    color: var(--text-soft);
    cursor: pointer;
    padding: 4px 8px;
    font-size: 16px;
    border-radius: 6px;
}
.sidebar-close:hover { background: var(--surface-2); color: var(--text); }

.sidebar-nav {
    flex: 1;
    padding: 12px 10px;
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.sidebar-section-label {
    font-size: 10px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin: 16px 8px 6px;
}

.sidebar-nav-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 10px;
    border-radius: 10px;
    color: var(--text-soft);
    font-size: 14px;
    font-weight: 500;
    transition: background var(--transition), color var(--transition);
    cursor: pointer;
}

.sidebar-nav-item:hover {
    background: var(--surface-2);
    color: var(--text);
}

.sidebar-nav-item.is-active {
    background: var(--accent-dim);
    color: var(--accent);
}

.nav-icon {
    width: 20px;
    text-align: center;
    font-size: 14px;
    flex-shrink: 0;
    font-style: normal;
}

.sidebar-footer {
    padding: 14px 14px;
    border-top: 1px solid var(--border);
    flex-shrink: 0;
}

.sidebar-user {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}

.sidebar-user-avatar {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--accent-dim);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 14px;
    flex-shrink: 0;
    font-family: "Space Grotesk", sans-serif;
}

.sidebar-user-name { display: block; font-size: 13px; font-weight: 600; color: var(--text); }
.sidebar-user-role { display: block; font-size: 11px; color: var(--text-muted); }

.sidebar-footer-links {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
    font-size: 12px;
    color: var(--text-soft);
}

.sidebar-footer-links a,
.sidebar-footer-links .link-btn {
    color: var(--text-soft);
    background: none;
    border: none;
    padding: 0;
    cursor: pointer;
    font-size: 12px;
    transition: color var(--transition);
}

.sidebar-footer-links a:hover,
.sidebar-footer-links .link-btn:hover { color: var(--accent); }

.sidebar-footer-links .sep { color: var(--text-muted); }

/* ── Main area ──────────────────────────────────────────────────── */

.app-main {
    margin-left: var(--sidebar-w);
    flex: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    min-width: 0;
}

/* ── Topbar ─────────────────────────────────────────────────────── */

.app-topbar {
    height: var(--topbar-h);
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar-menu-btn {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.topbar-menu-btn span {
    display: block;
    width: 20px;
    height: 2px;
    background: var(--text-soft);
    border-radius: 2px;
    transition: background var(--transition);
}

.topbar-menu-btn:hover span { background: var(--text); }

.topbar-title {
    font-size: 16px;
    font-weight: 700;
    margin: 0;
    flex: 1;
    color: var(--text);
}

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

.topbar-link {
    font-size: 13px;
    color: var(--text-soft);
    transition: color var(--transition);
}

.topbar-link:hover { color: var(--accent); }

/* ── Content area ───────────────────────────────────────────────── */

.app-content {
    flex: 1;
    padding: 32px 28px;
    max-width: 1100px;
}

/* ── Dashboard ──────────────────────────────────────────────────── */

.dashboard-welcome {
    margin-bottom: 32px;
}

.dashboard-welcome h2 {
    font-size: 26px;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text);
}

.dashboard-welcome p {
    color: var(--text-soft);
    font-size: 15px;
}

.tools-section-title {
    font-size: 11px;
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin: 28px 0 14px;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(220px, 1fr));
    gap: 14px;
}

.tool-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 22px 20px;
    cursor: pointer;
    transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
    display: block;
    color: var(--text);
    position: relative;
    overflow: hidden;
}

.tool-card:hover {
    border-color: var(--border-med);
    transform: translateY(-2px);
    box-shadow: var(--shadow);
}

.tool-card-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    margin-bottom: 14px;
}

.tool-card-icon.blue   { background: var(--accent-dim);  color: var(--accent); }
.tool-card-icon.green  { background: var(--green-dim);   color: var(--green); }
.tool-card-icon.coral  { background: var(--coral-dim);   color: var(--coral); }
.tool-card-icon.amber  { background: var(--amber-dim);   color: var(--amber); }
.tool-card-icon.purple { background: var(--purple-dim);  color: var(--purple); }

.tool-card-name {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--text);
}

.tool-card-desc {
    font-size: 12px;
    color: var(--text-soft);
    line-height: 1.5;
}

.tool-card-badge {
    position: absolute;
    top: 14px;
    right: 14px;
    font-size: 10px;
    font-weight: 700;
    padding: 2px 8px;
    border-radius: 20px;
    background: var(--green-dim);
    color: var(--green);
    letter-spacing: 0.05em;
}

/* ── Tool pages common ──────────────────────────────────────────── */

.tool-header {
    margin-bottom: 28px;
}

.tool-header h2 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 6px;
}

.tool-header p {
    color: var(--text-soft);
    font-size: 14px;
}

.tool-card-panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 20px;
}

.tool-card-panel h3 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 8px;
}

/* ── Forms ──────────────────────────────────────────────────────── */

.form-group {
    margin-bottom: 18px;
}

label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-soft);
    margin-bottom: 6px;
}

input[type="text"],
input[type="url"],
input[type="number"],
input[type="email"],
input[type="password"],
select,
textarea {
    width: 100%;
    background: var(--surface-2);
    border: 1px solid var(--border-med);
    border-radius: 10px;
    color: var(--text);
    padding: 10px 14px;
    font-size: 14px;
    transition: border-color var(--transition);
    outline: none;
}

input:focus,
select:focus,
textarea:focus {
    border-color: var(--accent);
}

input::placeholder,
textarea::placeholder { color: var(--text-muted); }

textarea { resize: vertical; min-height: 100px; }

select option { background: var(--surface-2); }

/* ── Buttons ────────────────────────────────────────────────────── */

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    transition: background var(--transition), transform var(--transition), opacity var(--transition);
    text-decoration: none;
}

.btn:active { transform: scale(0.98); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.btn-primary {
    background: var(--accent);
    color: #fff;
    border-color: var(--accent);
}
.btn-primary:hover { background: #55b5ff; }

.btn-secondary {
    background: var(--surface-2);
    color: var(--text);
    border-color: var(--border-med);
}
.btn-secondary:hover { background: var(--surface-3); }

.btn-green {
    background: var(--green);
    color: #111;
    border-color: var(--green);
}
.btn-green:hover { background: #c8ef5f; }

.btn-danger {
    background: var(--coral-dim);
    color: var(--coral);
    border-color: transparent;
}
.btn-danger:hover { background: rgba(255,107,95,0.25); }

.btn-sm { padding: 6px 14px; font-size: 12px; border-radius: 8px; }
.btn-lg { padding: 13px 28px; font-size: 15px; }
.btn-full { width: 100%; justify-content: center; }

/* ── Alerts ─────────────────────────────────────────────────────── */

.alert {
    padding: 12px 16px;
    border-radius: 10px;
    font-size: 14px;
    margin-bottom: 16px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
}

.alert-info  { background: var(--accent-dim);  color: var(--accent); }
.alert-success { background: var(--green-dim); color: var(--green); }
.alert-error { background: var(--coral-dim);   color: var(--coral); }
.alert-warn  { background: var(--amber-dim);   color: var(--amber); }

/* ── Result box ─────────────────────────────────────────────────── */

.result-box {
    background: var(--surface-2);
    border: 1px solid var(--border-med);
    border-radius: 10px;
    padding: 14px 16px;
    font-family: "Space Grotesk", monospace;
    font-size: 14px;
    word-break: break-all;
    color: var(--text);
    position: relative;
}

.result-box-actions {
    margin-top: 10px;
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

/* ── Range + checkbox ───────────────────────────────────────────── */

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

input[type="range"] {
    -webkit-appearance: none;
    appearance: none;
    flex: 1;
    height: 4px;
    border-radius: 4px;
    background: var(--surface-3);
    outline: none;
    border: none;
    padding: 0;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
}

.range-value {
    font-size: 14px;
    font-weight: 700;
    color: var(--accent);
    width: 36px;
    text-align: center;
}

.checkbox-group { display: flex; flex-direction: column; gap: 10px; }

.checkbox-row {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    font-size: 14px;
    color: var(--text-soft);
    user-select: none;
}

.checkbox-row input[type="checkbox"] {
    width: 16px;
    height: 16px;
    accent-color: var(--accent);
    cursor: pointer;
    flex-shrink: 0;
    padding: 0;
}

/* ── Progress / loader ──────────────────────────────────────────── */

.loader {
    display: none;
    align-items: center;
    gap: 10px;
    color: var(--text-soft);
    font-size: 14px;
    margin-top: 12px;
}

.loader.active { display: flex; }

.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid var(--surface-3);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

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

/* ── Tab strip ──────────────────────────────────────────────────── */

.tab-strip {
    display: flex;
    gap: 4px;
    background: var(--surface-2);
    border-radius: 12px;
    padding: 4px;
    margin-bottom: 20px;
    width: fit-content;
}

.tab-btn {
    padding: 7px 16px;
    border-radius: 8px;
    background: none;
    border: none;
    color: var(--text-soft);
    font-size: 13px;
    font-weight: 600;
    cursor: pointer;
    transition: background var(--transition), color var(--transition);
}

.tab-btn.active {
    background: var(--surface);
    color: var(--text);
}

.tab-pane { display: none; }
.tab-pane.active { display: block; }

/* ── QR preview ─────────────────────────────────────────────────── */

.qr-preview {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
    padding: 24px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
}

.qr-preview img {
    border-radius: 8px;
    image-rendering: pixelated;
}

/* ── Image preview ──────────────────────────────────────────────── */

.img-compare {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 16px;
}

.img-compare canvas,
.img-compare img {
    width: 100%;
    border-radius: 10px;
    border: 1px solid var(--border);
}

.img-stat {
    font-size: 12px;
    color: var(--text-soft);
    text-align: center;
    margin-top: 6px;
}

/* ── File drop zone ─────────────────────────────────────────────── */

.drop-zone {
    border: 2px dashed var(--border-med);
    border-radius: var(--radius);
    padding: 36px 24px;
    text-align: center;
    cursor: pointer;
    transition: border-color var(--transition), background var(--transition);
    color: var(--text-soft);
    font-size: 14px;
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--accent);
    background: var(--accent-dim);
    color: var(--accent);
}

.drop-zone input[type="file"] {
    display: none;
}

.drop-zone-icon {
    font-size: 32px;
    margin-bottom: 10px;
    display: block;
}

/* ── Stats row ──────────────────────────────────────────────────── */

.stats-row {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 12px;
    margin-top: 16px;
}

.stat-card {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px 16px;
    text-align: center;
}

.stat-value {
    font-size: 22px;
    font-weight: 700;
    font-family: "Space Grotesk", sans-serif;
    color: var(--accent);
    display: block;
}

.stat-label {
    font-size: 11px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    display: block;
    margin-top: 2px;
}

/* ── File list ──────────────────────────────────────────────────── */

.file-list {
    list-style: none;
    padding: 0;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.file-list-item {
    display: flex;
    align-items: center;
    gap: 10px;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 10px 14px;
    font-size: 13px;
}

.file-list-item .file-name { flex: 1; color: var(--text); font-weight: 500; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.file-list-item .file-size { color: var(--text-muted); font-size: 12px; }
.file-list-item .remove-btn { background: none; border: none; color: var(--text-muted); cursor: pointer; padding: 0 4px; font-size: 16px; }
.file-list-item .remove-btn:hover { color: var(--coral); }

/* ── Text area styled ───────────────────────────────────────────── */

.monospace {
    font-family: "Space Grotesk", monospace;
    font-size: 13px;
    line-height: 1.7;
}

/* ── Responsive ─────────────────────────────────────────────────── */

@media (max-width: 900px) {
    .app-sidebar {
        transform: translateX(-100%);
    }

    .app-sidebar.open {
        transform: translateX(0);
    }

    .app-main {
        margin-left: 0;
    }

    .topbar-menu-btn {
        display: flex;
    }

    .sidebar-close {
        display: block;
    }

    .sidebar-overlay {
        display: none;
        position: fixed;
        inset: 0;
        background: rgba(0,0,0,0.5);
        z-index: 99;
    }

    .sidebar-overlay.open {
        display: block;
    }

    .img-compare {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .app-content { padding: 20px 16px; }
    .tools-grid { grid-template-columns: 1fr 1fr; }
    .tab-strip { width: 100%; }
    .tab-btn { flex: 1; text-align: center; }
}

@media (max-width: 400px) {
    .tools-grid { grid-template-columns: 1fr; }
}