/* ============================
   QA Interview Platform — CSS
   ============================ */

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

:root {
    --color-accent:       #6366F1;
    --color-accent-light: #EEF2FF;
    --color-accent-dark:  #3730A3;
    --color-accent-muted: #C7D2FE;

    --color-bg:           #FFFFFF;
    --color-bg2:          #F8FAFC;
    --color-bg3:          #F1F5F9;
    --color-border:       #E2E8F0;
    --color-border2:      #CBD5E1;

    --color-text:         #0F172A;
    --color-text2:        #475569;
    --color-text3:        #94A3B8;

    --color-green:        #16A34A;
    --color-green-bg:     #DCFCE7;
    --color-red:          #DC2626;
    --color-red-bg:       #FEE2E2;
    --color-yellow:       #854D0E;
    --color-yellow-bg:    #FEF9C3;
    --color-blue:         #1D4ED8;
    --color-blue-bg:      #DBEAFE;
    --color-orange:       #9A3412;
    --color-orange-bg:    #FED7AA;

    --radius:   8px;
    --radius-sm: 6px;
    --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --mono: 'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
}

body { font-family: var(--font); background: var(--color-bg3); color: var(--color-text); font-size: 14px; }

a { color: inherit; text-decoration: none; }
a:hover { color: var(--color-accent); }

/* ── Shell layout ── */
.shell { display: flex; height: 100vh; overflow: hidden; }

/* ── Sidebar ── */
.sidebar {
    width: 224px; min-width: 224px;
    background: var(--color-bg);
    border-right: 1px solid var(--color-border);
    display: flex; flex-direction: column;
    padding: 20px 0;
    overflow-y: auto;
}

.sidebar-logo { padding: 0 20px 20px; border-bottom: 1px solid var(--color-border); margin-bottom: 16px; }
.sidebar-logo-text { font-size: 15px; font-weight: 600; display: flex; align-items: center; gap: 8px; }
.sidebar-logo-text .ti { color: var(--color-accent); }
.sidebar-logo-sub { font-size: 11px; color: var(--color-text3); margin-top: 3px; }

.sidebar-section { padding: 0 10px; margin-bottom: 8px; }
.sidebar-section-label {
    font-size: 10px; font-weight: 600; text-transform: uppercase;
    letter-spacing: 0.08em; color: var(--color-text3);
    padding: 0 8px; margin-bottom: 4px;
}

.nav-item {
    display: flex; align-items: center;
    border-radius: var(--radius-sm);
    margin-bottom: 1px;
    font-size: 13px; color: var(--color-text2);
}
.nav-item:hover { background: var(--color-bg2); }
.nav-item.active { background: var(--color-accent-light); color: var(--color-accent-dark); }
.nav-item .nav-link {
    display: flex; align-items: center; gap: 8px;
    padding: 7px 8px; width: 100%; color: inherit;
}
.nav-item .ti { font-size: 16px; flex-shrink: 0; }
.nav-item .badge {
    margin-left: auto; font-size: 10px;
    background: var(--color-bg3); color: var(--color-text3);
    padding: 1px 6px; border-radius: 20px; white-space: nowrap;
}
.nav-item.active .badge { background: var(--color-accent-muted); color: var(--color-accent-dark); }

.nav-sub { padding-left: 32px; }
.nav-sub-item {
    border-radius: var(--radius-sm);
    font-size: 13px; color: var(--color-text2);
    margin-bottom: 1px;
}
.nav-sub-item .nav-link {
    display: flex; align-items: center; gap: 8px;
    padding: 5px 8px; width: 100%; color: inherit;
}
.nav-sub-item:hover { background: var(--color-bg2); }
.nav-sub-item.active { color: var(--color-accent); font-weight: 500; }
.nav-sub-item.done .nav-link { color: var(--color-text3); }

.dot {
    width: 6px; height: 6px; border-radius: 50%;
    background: var(--color-border2); flex-shrink: 0;
}
.nav-sub-item.done .dot { background: var(--color-green); }
.nav-sub-item.active .dot { background: var(--color-accent); }

/* ── Main area ── */
.main { flex: 1; display: flex; flex-direction: column; overflow: hidden; }

.topbar {
    padding: 14px 24px;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg);
    display: flex; align-items: center; justify-content: space-between;
    flex-shrink: 0;
}
.topbar-title { font-size: 14px; font-weight: 500; }
.topbar-meta { font-size: 12px; color: var(--color-text3); }

.progress-bar-wrap { height: 3px; background: var(--color-bg3); flex-shrink: 0; }
.progress-bar-fill { height: 3px; background: var(--color-accent); transition: width 0.3s; }

.content { flex: 1; overflow-y: auto; padding: 24px; display: flex; flex-direction: column; gap: 16px; }

/* ── Cards ── */
.task-card, .result-card, .admin-card {
    background: var(--color-bg);
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 20px;
}

.task-top { display: flex; align-items: center; justify-content: space-between; margin-bottom: 12px; }
.task-num { font-size: 12px; color: var(--color-text3); }

.level-badge {
    font-size: 11px; font-weight: 500;
    padding: 3px 10px; border-radius: 20px;
}
.level-easy   { background: var(--color-green-bg);  color: var(--color-green); }
.level-medium { background: var(--color-yellow-bg); color: var(--color-yellow); }
.level-hard   { background: var(--color-red-bg);    color: var(--color-red); }
.level-xpath  { background: var(--color-blue-bg);   color: var(--color-blue); }
.level-rest   { background: var(--color-orange-bg); color: var(--color-orange); }

.task-q { font-size: 14px; line-height: 1.7; margin-bottom: 16px; color: var(--color-text); }

/* ── Schema hint ── */
.schema-hint {
    background: var(--color-bg2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 12px 14px;
    margin-bottom: 16px;
    font-family: var(--mono); font-size: 12px;
    color: var(--color-text2); line-height: 1.8;
}
.schema-hint-label { font-family: var(--font); font-size: 11px; color: var(--color-text3); margin-bottom: 6px; }
.schema-hint pre { white-space: pre-wrap; }

/* ── Editor ── */
.editor-wrap {
    border: 1px solid var(--color-border2);
    border-radius: var(--radius-sm);
    overflow: hidden;
}
.editor-topbar {
    background: var(--color-bg2);
    border-bottom: 1px solid var(--color-border);
    padding: 8px 12px;
    display: flex; align-items: center; justify-content: space-between;
}
.editor-lang { font-size: 12px; color: var(--color-text3); display: flex; align-items: center; gap: 6px; }

.editor-area, .selector-input {
    width: 100%; font-family: var(--mono); font-size: 13px;
    padding: 12px; border: none;
    background: var(--color-bg); color: var(--color-text);
    outline: none; line-height: 1.7;
}
.editor-area { min-height: 100px; resize: vertical; }
.selector-input { display: block; }

/* ── Code block (REST hint) ── */
.code-block {
    background: var(--color-bg2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    margin-bottom: 16px;
    font-family: var(--mono); font-size: 12px;
    line-height: 1.7; overflow-x: auto;
}
.code-block pre { white-space: pre-wrap; }

/* ── Result ── */
.result-card { padding: 14px 20px; }
.result-top {
    font-size: 12px; color: var(--color-text3);
    display: flex; align-items: center; gap: 10px;
    margin-bottom: 10px;
}
.result-ok    { color: var(--color-green);  display: flex; align-items: center; gap: 4px; font-weight: 500; }
.result-wrong { color: var(--color-red);    display: flex; align-items: center; gap: 4px; font-weight: 500; }
.result-error { color: var(--color-yellow); display: flex; align-items: center; gap: 4px; font-weight: 500; }

.error-message {
    background: var(--color-red-bg); color: var(--color-red);
    padding: 10px 14px; border-radius: var(--radius-sm);
    font-family: var(--mono); font-size: 12px; margin-bottom: 10px;
}

.result-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.result-table th {
    text-align: left; padding: 6px 10px;
    background: var(--color-bg2); color: var(--color-text2);
    font-weight: 500; border-bottom: 1px solid var(--color-border);
}
.result-table td { padding: 6px 10px; border-bottom: 1px solid var(--color-border); }
.result-table tr:last-child td { border-bottom: none; }
.result-limit-note { font-size: 12px; color: var(--color-text3); margin-top: 8px; }

/* ── XPath preview ── */
.xpath-preview-wrap { margin-bottom: 16px; }
.xpath-preview-label { font-size: 11px; color: var(--color-text3); margin-bottom: 6px; }
.xpath-preview {
    background: var(--color-bg2);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 14px; font-family: var(--mono); font-size: 12px;
    line-height: 1.7; overflow-x: auto;
}
.xpath-preview .highlight {
    background: #FEF08A; outline: 2px solid #CA8A04;
    border-radius: 3px;
}
.xpath-highlight-note { font-size: 11px; color: var(--color-text3); margin-top: 6px; }

.selector-type-toggle { display: flex; gap: 16px; margin-bottom: 12px; font-size: 13px; }
.selector-type-toggle label { display: flex; align-items: center; gap: 6px; cursor: pointer; }

.xpath-result {
    margin-top: 12px; padding: 10px 14px;
    border-radius: var(--radius-sm); font-size: 13px;
}
.xpath-result.ok    { background: var(--color-green-bg); color: var(--color-green); }
.xpath-result.wrong { background: var(--color-red-bg);   color: var(--color-red); }

/* ── Buttons ── */
.btn-primary, .run-btn {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 7px 16px; border-radius: var(--radius-sm);
    background: var(--color-accent); color: #fff;
    border: none; font-size: 13px; font-weight: 500;
    cursor: pointer; transition: opacity 0.15s;
}
.btn-primary:hover, .run-btn:hover { opacity: 0.9; color: #fff; }

.btn-ghost {
    display: inline-flex; align-items: center; gap: 6px;
    padding: 7px 16px; border-radius: var(--radius-sm);
    background: transparent; color: var(--color-text2);
    border: 1px solid var(--color-border2);
    font-size: 13px; cursor: pointer;
}
.btn-ghost:hover { background: var(--color-bg2); color: var(--color-text); }

.btn-copy {
    margin-left: 10px; padding: 4px 10px;
    border: 1px solid var(--color-border2);
    border-radius: var(--radius-sm);
    background: var(--color-bg); font-size: 12px; cursor: pointer;
    display: inline-flex; align-items: center; gap: 4px;
}

.btn-icon-danger {
    padding: 5px 8px; border-radius: var(--radius-sm);
    background: transparent; color: var(--color-text3);
    border: 1px solid var(--color-border);
    cursor: pointer; display: inline-flex; align-items: center;
}
.btn-icon-danger:hover { background: var(--color-red-bg); color: var(--color-red); border-color: var(--color-red); }

/* ── Bottom nav ── */
.nav-actions {
    display: flex; align-items: center; justify-content: flex-end; gap: 10px;
    padding: 14px 24px;
    border-top: 1px solid var(--color-border);
    background: var(--color-bg);
    flex-shrink: 0;
}

/* ── Admin ── */
.admin-body { background: var(--color-bg3); }
.admin-wrap { max-width: 1100px; margin: 0 auto; padding: 32px 24px; }
.admin-header {
    display: flex; align-items: center; justify-content: space-between;
    margin-bottom: 24px;
}
.admin-title { font-size: 20px; font-weight: 600; display: flex; align-items: center; gap: 8px; }
.admin-title .ti { color: var(--color-accent); }

.admin-grid { display: grid; grid-template-columns: 340px 1fr; gap: 24px; align-items: start; }

.admin-card-title { font-size: 14px; font-weight: 600; margin-bottom: 16px; }

.form-group { margin-bottom: 14px; }
.form-group label { display: block; font-size: 12px; color: var(--color-text2); margin-bottom: 6px; font-weight: 500; }
.form-input {
    width: 100%; padding: 8px 10px;
    border: 1px solid var(--color-border2);
    border-radius: var(--radius-sm);
    font-size: 13px; background: var(--color-bg);
    color: var(--color-text); outline: none;
}
.form-input:focus { border-color: var(--color-accent); }

.checkbox-group { display: flex; flex-direction: column; gap: 8px; }
.checkbox-label { display: flex; align-items: center; gap: 8px; font-size: 13px; cursor: pointer; }

.admin-table { width: 100%; border-collapse: collapse; font-size: 13px; }
.admin-table th {
    text-align: left; padding: 8px 10px;
    border-bottom: 1px solid var(--color-border);
    font-size: 11px; font-weight: 600;
    text-transform: uppercase; letter-spacing: 0.05em; color: var(--color-text3);
}
.admin-table td { padding: 10px 10px; border-bottom: 1px solid var(--color-border); vertical-align: middle; }
.admin-table tr:last-child td { border-bottom: none; }

.token-link { font-family: var(--mono); font-size: 12px; color: var(--color-accent); }

.badge-active  { background: var(--color-green-bg);  color: var(--color-green);  padding: 2px 8px; border-radius: 20px; font-size: 11px; }
.badge-used    { background: var(--color-yellow-bg);  color: var(--color-yellow); padding: 2px 8px; border-radius: 20px; font-size: 11px; }
.badge-expired { background: var(--color-bg3); color: var(--color-text3); padding: 2px 8px; border-radius: 20px; font-size: 11px; }

.empty-state { text-align: center; padding: 32px; color: var(--color-text3); font-size: 13px; }

/* ── Login ── */
.login-body { background: var(--color-bg3); display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-wrap { width: 100%; max-width: 380px; padding: 24px; }
.login-card { background: var(--color-bg); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 32px; }
.login-logo { font-size: 18px; font-weight: 600; display: flex; align-items: center; justify-content: center; gap: 8px; }
.login-logo .ti { color: var(--color-accent); }
.login-subtitle { text-align: center; font-size: 12px; color: var(--color-text3); margin: 6px 0 24px; }

/* ── Flash messages ── */
.flash-success {
    background: var(--color-green-bg); color: var(--color-green);
    border: 1px solid #86EFAC;
    border-radius: var(--radius-sm); padding: 12px 16px;
    margin-bottom: 20px; font-size: 13px;
}
.flash-info {
    background: var(--color-blue-bg); color: var(--color-blue);
    border: 1px solid #93C5FD;
    border-radius: var(--radius-sm); padding: 12px 16px;
    margin-bottom: 20px; font-size: 13px;
}
.flash-error {
    background: var(--color-red-bg); color: var(--color-red);
    border: 1px solid #FCA5A5;
    border-radius: var(--radius-sm); padding: 12px 16px;
    margin-bottom: 16px; font-size: 13px;
}

/* ── Admin nav tabs ── */
.admin-nav-tabs { display: flex; align-items: center; gap: 4px; }
.admin-tab {
    padding: 7px 16px; border-radius: var(--radius-sm);
    font-size: 13px; color: var(--color-text2);
    border: 1px solid transparent;
}
.admin-tab:hover { background: var(--color-bg2); color: var(--color-text); }
.admin-tab.active {
    background: var(--color-accent-light); color: var(--color-accent-dark);
    border-color: var(--color-accent-muted);
}

/* ── Topbar right (lang switch) ── */
.topbar-right { display: flex; align-items: center; gap: 12px; }
.lang-btn {
    padding: 4px 12px; border-radius: var(--radius-sm);
    border: 1px solid var(--color-border2);
    background: var(--color-bg); color: var(--color-text2);
    font-size: 12px; font-weight: 600; cursor: pointer;
    letter-spacing: 0.05em;
}
.lang-btn:hover { background: var(--color-accent-light); color: var(--color-accent-dark); border-color: var(--color-accent-muted); }