@import url('https://fonts.googleapis.com/css2?family=Syne:wght@400;600;700;800&family=DM+Mono:wght@300;400;500&display=swap');

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

:root {
    --black:   #000000;
    --k:       #0a0a0a;
    --bg1:     #111111;
    --bg2:     #161616;
    --bg3:     #1e1e1e;
    --border:  #2a2a2a;
    --dim:     #444444;
    --muted:   #888888;
    --cream:   #f0ece4;
    --white:   #ffffff;
    --gold:    #c9a96e;
    --gold-lt: rgba(201,169,110,.12);
    --gold-br: rgba(201,169,110,.35);
    --green:   #4ade80;
    --blue:    #38bdf8;
    --red:     #f87171;
    --orange:  #fb923c;

    --font-display: 'Syne', sans-serif;
    --font-mono:    'DM Mono', monospace;
}

html { scroll-behavior: smooth; }

body {
    font-family: var(--font-mono);
    background: var(--k);
    color: var(--cream);
    font-size: 13px;
    line-height: 1.6;
    min-height: 100vh;
}

/* ── Header ── */
header {
    text-align: center;
    padding: 40px 20px 12px;
    border-bottom: 1px solid var(--border);
    margin-bottom: 32px;
}

.header-label {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .22em;
    text-transform: uppercase;
    color: var(--cream);
    margin-bottom: 6px;
}

header h1 {
    font-family: var(--font-display);
    font-size: 36px;
    font-weight: 800;
    color: var(--gold);
    line-height: 1;
    letter-spacing: -.02em;
    margin-bottom: 8px;
}

.subtitle {
    font-family: var(--font-mono);
    font-size: 10px;
    color: var(--dim);
    letter-spacing: .1em;
}

/* ── Layout ── */
main {
    max-width: 900px;
    margin: 0 auto;
    padding: 0 24px 60px;
}

/* ── Panels ── */
.panel {
    background: var(--bg1);
    border: 1px solid var(--border);
    padding: 24px;
    margin-bottom: 16px;
}

.panel-label {
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: .14em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 16px;
}

/* ── Browser panel ── */
.browser-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.breadcrumb {
    display: flex;
    gap: 4px;
    align-items: center;
    flex-wrap: wrap;
    margin-bottom: 12px;
    min-height: 28px;
}

.breadcrumb-item {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--muted);
    cursor: pointer;
    padding: 2px 6px;
    transition: color .15s;
    background: none;
    border: none;
}

.breadcrumb-item:hover { color: var(--gold); }
.breadcrumb-item.current { color: var(--cream); cursor: default; }
.breadcrumb-sep { color: var(--dim); font-size: 10px; }

.folder-list {
    display: flex;
    flex-direction: column;
    max-height: 300px;
    overflow-y: auto;
    border: 1px solid var(--border);
}

.folder-item {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 8px 14px;
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--cream);
    transition: background .1s;
    border: none;
    border-bottom: 1px solid var(--border);
    text-align: left;
    width: 100%;
    background: var(--k);
}

.folder-item:last-child { border-bottom: none; }
.folder-item:hover { background: var(--bg3); }

.folder-icon {
    color: var(--gold);
    font-size: 13px;
    flex-shrink: 0;
    width: 18px;
    text-align: center;
}

.folder-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    flex: 1;
}

.folder-meta {
    font-size: 10px;
    color: var(--dim);
    letter-spacing: .06em;
    flex-shrink: 0;
}

.current-folder-info {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

.file-count {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .06em;
    color: var(--dim);
}

.btn-select-folder {
    background: var(--gold);
    color: #000;
    border: none;
    padding: 8px 20px;
    font-family: var(--font-mono);
    font-size: 11px;
    font-weight: 500;
    letter-spacing: .1em;
    text-transform: uppercase;
    cursor: pointer;
    transition: opacity .15s;
}

.btn-select-folder:hover { opacity: .85; }
.btn-select-folder:disabled { opacity: .35; cursor: not-allowed; }

/* ── Labels ── */
label {
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--muted);
    display: block;
    margin-bottom: 6px;
}

/* ── Inputs ── */
input[type="text"],
input[type="number"],
select {
    width: 100%;
    background: var(--bg1);
    border: 1px solid var(--border);
    color: var(--cream);
    padding: 12px 14px;
    font-family: var(--font-mono);
    font-size: 13px;
    outline: none;
    transition: border-color .2s;
}

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

/* ── Tabs ── */
.tabs {
    display: flex;
    gap: 0;
    border-bottom: 1px solid var(--border);
    margin-bottom: 20px;
    flex-wrap: wrap;
}

.tab {
    padding: 10px 18px;
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--muted);
    cursor: pointer;
    font-family: var(--font-mono);
    font-size: 10px;
    letter-spacing: .1em;
    text-transform: uppercase;
    transition: all .15s;
}

.tab:hover { color: var(--cream); }

.tab.active {
    color: var(--gold);
    border-bottom-color: var(--gold);
}

/* ── Rule forms ── */
.rule-form { display: flex; flex-direction: column; gap: 16px; }
.rule-form.hidden { display: none; }

.field-row { display: flex; gap: 16px; }
.field-row .field { flex: 1; }

/* ── Info box ── */
.info-box {
    padding: 14px 18px;
    background: var(--gold-lt);
    border: 1px solid var(--gold-br);
    font-family: var(--font-mono);
    font-size: 12px;
    color: var(--muted);
    line-height: 1.7;
}

.info-box strong { color: var(--cream); font-weight: 500; }

/* ── Preview ── */
.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 16px;
}

.preview-header h2 {
    font-family: var(--font-display);
    font-size: 18px;
    font-weight: 700;
    color: var(--white);
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: .1em;
    text-transform: uppercase;
    padding: 3px 9px;
    border: 1px solid var(--border);
    color: var(--muted);
    white-space: nowrap;
}

.badge.has-changes {
    color: var(--gold);
    border-color: var(--gold-br);
    background: var(--gold-lt);
}

.preview-list {
    max-height: 400px;
    overflow-y: auto;
}

.preview-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 8px 12px;
    font-family: var(--font-mono);
    font-size: 12px;
    transition: background .1s;
    border-bottom: 1px solid var(--border);
}

.preview-item:last-child { border-bottom: none; }
.preview-item:hover { background: var(--bg2); }

.preview-item.changed .old-name {
    color: var(--red);
    text-decoration: line-through;
    opacity: .7;
}

.preview-item.changed .new-name {
    color: var(--green);
    font-weight: 500;
}

.preview-item .arrow {
    color: var(--dim);
    font-size: 12px;
    flex-shrink: 0;
}

.preview-item.unchanged { opacity: .3; }

.preview-item .old-name,
.preview-item .new-name {
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
    min-width: 0;
    flex: 1;
}

.dir-badge {
    font-family: var(--font-mono);
    font-size: 9px;
    letter-spacing: .1em;
    text-transform: uppercase;
    padding: 2px 6px;
    border: 1px solid var(--border);
    color: var(--dim);
    flex-shrink: 0;
}

/* ── Buttons ── */
.btn-primary {
    background: var(--gold);
    color: #000;
    border: none;
    padding: 13px 28px;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 500;
    letter-spacing: .1em;
    text-transform: uppercase;
    cursor: pointer;
    transition: opacity .15s;
}

.btn-primary:hover:not(:disabled) { opacity: .85; }
.btn-primary:disabled { opacity: .35; cursor: not-allowed; }

.btn-secondary {
    background: transparent;
    color: var(--muted);
    border: 1px solid var(--border);
    padding: 11px 24px;
    font-family: var(--font-mono);
    font-size: 12px;
    letter-spacing: .1em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all .15s;
}

.btn-secondary:hover:not(:disabled) { border-color: var(--gold); color: var(--gold); }
.btn-secondary:disabled { opacity: .35; cursor: not-allowed; }

.actions {
    display: flex;
    gap: 12px;
    justify-content: center;
    margin-top: 16px;
}

/* ── Toast ── */
.toast {
    position: fixed;
    bottom: 24px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 24px;
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 400;
    letter-spacing: .04em;
    z-index: 100;
    border: 1px solid;
    transition: opacity .3s, transform .3s;
}

.toast.hidden {
    opacity: 0;
    transform: translateX(-50%) translateY(10px);
    pointer-events: none;
}

.toast.success { background: rgba(74,222,128,.08); color: var(--green); border-color: rgba(74,222,128,.35); }
.toast.error   { background: rgba(248,113,113,.08); color: var(--red);   border-color: #7f3333; }
.toast.info    { background: var(--gold-lt);         color: var(--gold);  border-color: var(--gold-br); }

/* ── Scrollbar ── */
::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: var(--k); }
::-webkit-scrollbar-thumb { background: #333; border-radius: 2px; }

/* ── Responsive ── */
@media (max-width: 600px) {
    .tabs { gap: 0; }
    .tab { padding: 8px 12px; font-size: 9px; }
    .field-row { flex-direction: column; }
    .actions { flex-direction: column; }
    .folder-list { max-height: 220px; }
}