/* ==========================================================================
   Export Intelligence — modern SaaS UI
   Extracted from web_app.py. All original class names are preserved.
   ========================================================================== */
:root {
    --bg: #f4f6fb;
    --bg-2: #eef2f9;
    --surface: #ffffff;
    --surface-2: #f8fafc;
    --border: #e4e9f2;
    --border-strong: #cbd5e1;
    --text: #0f172a;
    --muted: #64748b;
    --muted-2: #94a3b8;
    --primary: #4f46e5;
    --primary-600: #4338ca;
    --primary-050: #eef2ff;
    --accent: #0284c7;
    --success: #16a34a;
    --success-050: #f0fdf4;
    --danger: #dc2626;
    --danger-050: #fef2f2;
    --warning: #b45309;
    --warning-050: #fffbeb;
    --radius: 14px;
    --radius-sm: 10px;
    --shadow-sm: 0 1px 2px rgba(16, 24, 40, .05);
    --shadow: 0 1px 3px rgba(16, 24, 40, .06), 0 12px 28px -16px rgba(16, 24, 40, .18);
    --ring: 0 0 0 3px rgba(79, 70, 229, .18);
}

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

html, body { height: 100%; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background:
        radial-gradient(1200px 600px at 100% -10%, #e8edff 0%, rgba(232, 237, 255, 0) 60%),
        linear-gradient(180deg, var(--bg) 0%, var(--bg-2) 100%);
    background-attachment: fixed;
    color: var(--text);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    line-height: 1.5;
}

.container {
    max-width: 1180px;
    margin: 0 auto;
    padding: 28px 18px 56px;
}

/* ---- Header ---- */
.header {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    box-shadow: var(--shadow);
    padding: 26px 28px;
    margin-bottom: 20px;
    position: relative;
    overflow: hidden;
}
.header::before {
    content: "";
    position: absolute; inset: 0 0 auto 0; height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--accent));
}
.header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 6px;
}
.header p {
    color: var(--muted);
    font-size: 0.94rem;
    max-width: 820px;
    margin-bottom: 14px;
}
.formula-badge {
    display: inline-block;
    background: var(--primary-050);
    color: var(--primary-600);
    border: 1px solid #e0e7ff;
    border-radius: 999px;
    padding: 7px 14px;
    font-size: 0.82rem;
    font-weight: 600;
    margin-bottom: 16px;
}
.header-actions { display: flex; flex-wrap: wrap; gap: 10px; }
.header-action-btn {
    background: var(--surface-2);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 9px 15px;
    font-size: 0.84rem;
    font-weight: 600;
    cursor: pointer;
    transition: all .16s ease;
}
.header-action-btn:hover {
    background: var(--primary-050);
    border-color: #c7d2fe;
    color: var(--primary-600);
    transform: translateY(-1px);
}

/* ---- Tabs ---- */
.tabs-nav {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 18px;
    padding: 8px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
}
.tab-btn {
    flex: 0 0 auto;
    white-space: nowrap;
    border: none;
    background: transparent;
    color: var(--muted);
    font-size: 0.9rem;
    font-weight: 600;
    padding: 11px 18px;
    border-radius: 999px;
    cursor: pointer;
    transition: all .16s ease;
}
.tab-btn:hover { color: var(--text); background: var(--surface-2); }
.tab-btn.active {
    background: linear-gradient(135deg, var(--primary), var(--primary-600));
    color: #fff;
    box-shadow: 0 8px 18px -8px rgba(79, 70, 229, .7);
}
.tab-content { display: none; animation: fade .2s ease; }
.tab-content.active { display: block; }
@keyframes fade { from { opacity: 0; transform: translateY(4px); } to { opacity: 1; transform: none; } }

/* ---- Cards ---- */
.autofetch-card,
.multi-toggle-card,
.upload-section,
.mode-info-card,
.sample-bar {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 22px;
    margin-bottom: 18px;
}
.mode-info-card {
    border-left: 4px solid var(--primary);
    color: #334155;
    font-size: 0.9rem;
    line-height: 1.65;
}
.mode-info-card b { color: var(--text); }
.autofetch-header {
    font-size: 1.06rem;
    font-weight: 700;
    color: var(--text);
    margin-bottom: 6px;
}
.autofetch-desc {
    color: var(--muted);
    font-size: 0.88rem;
    margin-bottom: 18px;
}
.hint { font-size: 0.8rem; color: var(--muted); margin-top: 4px; }
.sample-bar { display: flex; flex-wrap: wrap; align-items: center; gap: 12px; }

/* ---- Forms ---- */
.form-row {
    display: flex;
    gap: 14px;
    flex-wrap: wrap;
    margin-bottom: 16px;
}
.form-group { display: flex; flex-direction: column; min-width: 180px; flex: 1; }
.form-group label,
label {
    font-size: 0.82rem;
    font-weight: 600;
    color: #334155;
    margin-bottom: 7px;
}
input[type="text"],
input[type="number"],
input[type="email"],
input[type="password"],
select,
textarea {
    width: 100%;
    padding: 11px 13px;
    font-size: 0.92rem;
    font-family: inherit;
    color: var(--text);
    background: var(--surface);
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-sm);
    transition: border-color .15s ease, box-shadow .15s ease;
}
input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: var(--ring);
}
input[disabled] { background: var(--surface-2); color: var(--muted); }

.checkbox-label {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    font-size: 0.86rem;
    font-weight: 500;
    color: #334155;
    cursor: pointer;
}

/* ---- Buttons ---- */
.submit-btn,
.autofetch-btn {
    display: inline-block;
    width: 100%;
    padding: 14px 20px;
    font-size: 0.96rem;
    font-weight: 700;
    color: #fff;
    background: linear-gradient(135deg, var(--primary), var(--primary-600));
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all .16s ease;
    box-shadow: 0 10px 22px -12px rgba(79, 70, 229, .8);
}
.submit-btn:hover, .autofetch-btn:hover { transform: translateY(-1px); filter: brightness(1.03); }
.submit-btn:disabled, .autofetch-btn:disabled { opacity: .6; cursor: not-allowed; transform: none; }
.secondary-btn, .sample-btn {
    background: var(--surface-2);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 10px 16px;
    font-size: 0.86rem;
    font-weight: 600;
    cursor: pointer;
    transition: all .16s ease;
}
.secondary-btn:hover, .sample-btn:hover { background: var(--primary-050); border-color: #c7d2fe; color: var(--primary-600); }
.open-btn, .whatsapp-btn, .copy-btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 9px 14px;
    font-size: 0.84rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    text-decoration: none;
}
.open-btn { background: var(--success); color: #fff; }
.whatsapp-btn { background: #25d366; color: #04310f; }
.copy-btn { background: var(--surface-2); color: var(--text); border: 1px solid var(--border); }
.copy-btn:hover { background: var(--primary-050); }

/* ---- Chips ---- */
.quick-chips { display: flex; flex-wrap: wrap; gap: 8px; align-items: center; margin: 6px 0 14px; }
.chip-label { font-size: 0.78rem; font-weight: 600; color: var(--muted); }
.chip-btn {
    background: var(--surface-2);
    color: #334155;
    border: 1px solid var(--border);
    border-radius: 999px;
    padding: 7px 13px;
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    transition: all .15s ease;
}
.chip-btn:hover { background: var(--primary-050); border-color: #c7d2fe; color: var(--primary-600); transform: translateY(-1px); }

/* ---- Years ---- */
.years-group { display: flex; flex-wrap: wrap; gap: 8px; }
.year-cb-label {
    display: inline-flex;
    align-items: center;
    gap: 7px;
    padding: 9px 13px;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: var(--surface);
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all .15s ease;
}
.year-cb-label:hover { border-color: #c7d2fe; background: var(--primary-050); }
.current-year-highlight { border-color: #bbf7d0; background: var(--success-050); }
.curr-badge {
    background: var(--success);
    color: #fff;
    font-size: 0.62rem;
    font-weight: 700;
    padding: 2px 6px;
    border-radius: 999px;
    letter-spacing: .04em;
}
.multi-badge {
    background: var(--primary-050);
    color: var(--primary-600);
    font-size: 0.68rem;
    font-weight: 700;
    padding: 3px 8px;
    border-radius: 999px;
}

/* ---- Source mode switcher ---- */
.source-mode-nav { display: inline-flex; gap: 6px; background: var(--surface-2); border: 1px solid var(--border); border-radius: 999px; padding: 5px; margin-bottom: 16px; }
.source-btn {
    border: none;
    background: transparent;
    color: var(--muted);
    font-size: 0.84rem;
    font-weight: 600;
    padding: 9px 16px;
    border-radius: 999px;
    cursor: pointer;
    transition: all .15s ease;
}
.source-btn.active { background: var(--surface); color: var(--primary-600); box-shadow: var(--shadow-sm); }

/* ---- File upload ---- */
.file-box {
    border: 2px dashed var(--border-strong);
    border-radius: var(--radius);
    background: var(--surface-2);
    padding: 26px;
    text-align: center;
    cursor: pointer;
    transition: all .15s ease;
    color: var(--muted);
    font-size: 0.9rem;
}
.file-box:hover, .file-box.has-file { border-color: var(--primary); background: var(--primary-050); color: var(--primary-600); }
.file-list-preview { font-size: 0.85rem; color: var(--muted); margin-top: 10px; }
.file-status-text { font-size: 0.82rem; color: var(--success); margin-top: 6px; font-weight: 600; }

/* ---- Status messages ---- */
.status-msg {
    margin-top: 14px;
    padding: 12px 14px;
    border-radius: var(--radius-sm);
    font-size: 0.88rem;
    font-weight: 500;
    display: none;
}
.status-msg.success { display: block; background: var(--success-050); color: #166534; border: 1px solid #bbf7d0; }
.status-msg.error { display: block; background: var(--danger-050); color: #991b1b; border: 1px solid #fecaca; }
.status-msg.loading { display: block; background: var(--primary-050); color: var(--primary-600); border: 1px solid #e0e7ff; }
.status-msg.warning { display: block; background: var(--warning-050); color: var(--warning); border: 1px solid #fde68a; }

/* ---- Tables ---- */
table { width: 100%; border-collapse: collapse; font-size: 0.88rem; }
th, td { padding: 10px 12px; text-align: left; border-bottom: 1px solid var(--border); }
thead th { background: var(--surface-2); color: #334155; font-weight: 700; font-size: 0.8rem; text-transform: uppercase; letter-spacing: .03em; }
tbody tr:hover { background: var(--surface-2); }
.port-table { width: 100%; }

/* ---- Modal ---- */
.modal-backdrop {
    display: none;
    position: fixed; inset: 0;
    background: rgba(15, 23, 42, .5);
    backdrop-filter: blur(3px);
    z-index: 1000;
    padding: 24px;
    overflow-y: auto;
}
.modal-backdrop.active { display: flex; align-items: flex-start; justify-content: center; }
.custom-modal, .modal-dialog {
    background: var(--surface);
    border-radius: 18px;
    box-shadow: 0 30px 60px -20px rgba(15, 23, 42, .5);
    width: 100%;
    max-width: 760px;
    margin: 24px auto;
    overflow: hidden;
    animation: fade .18s ease;
}
.modal-lg { max-width: 980px; }
.modal-header {
    display: flex; align-items: center; justify-content: space-between;
    padding: 18px 22px;
    border-bottom: 1px solid var(--border);
    font-size: 1.06rem; font-weight: 700;
}
.modal-body { padding: 22px; color: #334155; font-size: 0.92rem; line-height: 1.65; }
.modal-footer { padding: 16px 22px; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 10px; }
.close-btn {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: 10px;
    width: 34px; height: 34px;
    font-size: 1.1rem; line-height: 1;
    color: var(--muted);
    cursor: pointer;
}
.close-btn:hover { background: var(--danger-050); color: var(--danger); border-color: #fecaca; }

/* ---- History ---- */
.hsn-history-section { background: var(--surface-2); border: 1px solid var(--border); border-radius: var(--radius-sm); padding: 12px 14px; }

/* ---- Footer ---- */
.footer {
    text-align: center;
    color: var(--muted-2);
    font-size: 0.8rem;
    padding: 28px 0 8px;
}

/* ---- Utilities ---- */
code { background: var(--surface-2); border: 1px solid var(--border); border-radius: 6px; padding: 1px 6px; font-size: 0.86em; }
a { color: var(--primary); }

/* ---- Ad slots (AdSense) ---- */
.ad-slot {
    min-height: 100px;
    margin: 18px 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--surface-2);
    border: 1px dashed var(--border-strong);
    border-radius: var(--radius);
    color: var(--muted-2);
    font-size: 0.78rem;
    overflow: hidden;
}
.ad-placeholder { letter-spacing: .08em; text-transform: uppercase; font-weight: 600; }

/* ---- Responsive ---- */
@media (max-width: 720px) {
    .container { padding: 16px 12px 40px; }
    .header { padding: 20px; }
    .header h1 { font-size: 1.25rem; }
    .form-group { min-width: 100%; }
    .tabs-nav { border-radius: 14px; }
    .tab-btn { padding: 10px 14px; font-size: 0.84rem; }
    .modal-backdrop { padding: 10px; }
    .custom-modal, .modal-dialog { margin: 10px auto; border-radius: 14px; }
    .ad-slot { min-height: 80px; }
}