/* === Sales Assistant — Dongfang Elec Engineering === */
:root {
    --bg: #0f1923;
    --bg-card: #162231;
    --bg-card-alt: #1a2a3d;
    --text: #e0e6ed;
    --text-muted: #8896a6;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --border: #253548;
    --danger: #ef4444;
    --warning: #f59e0b;
    --success: #10b981;
    --info: #6366f1;
    --radius: 10px;
    --shadow: 0 2px 12px rgba(0,0,0,0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans SC", sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
}

/* === Navbar === */
.navbar {
    background: var(--bg-card);
    border-bottom: 1px solid var(--border);
    padding: 0 2rem;
    display: flex;
    align-items: center;
    height: 56px;
    gap: 2rem;
    position: sticky;
    top: 0;
    z-index: 100;
}
.nav-brand a {
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--accent);
    text-decoration: none;
}
.nav-subtitle {
    font-size: 0.7rem;
    color: var(--text-muted);
    display: block;
}
.nav-links {
    display: flex;
    gap: 1rem;
    flex: 1;
}
.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    transition: all 0.2s;
}
.nav-link:hover, .nav-link.active {
    color: var(--text);
    background: rgba(255,255,255,0.06);
}
.nav-link.logout { color: var(--danger); }
.nav-user {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-left: auto;
}
.nav-username {
    color: var(--text);
    font-size: 0.85rem;
    font-weight: 600;
}

/* === Main Container === */
.main-container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 2rem;
}

/* === Flash Messages === */
.flash-messages { margin-bottom: 1.5rem; }
.flash {
    padding: 0.75rem 1rem;
    border-radius: var(--radius);
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
}
.flash-success { background: rgba(16,185,129,0.15); color: var(--success); border: 1px solid rgba(16,185,129,0.3); }
.flash-danger { background: rgba(239,68,68,0.15); color: var(--danger); border: 1px solid rgba(239,68,68,0.3); }
.flash-warning { background: rgba(245,158,11,0.15); color: var(--warning); border: 1px solid rgba(245,158,11,0.3); }
.flash-info { background: rgba(99,102,241,0.15); color: var(--info); border: 1px solid rgba(99,102,241,0.3); }

/* === Cards === */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
    transition: border-color 0.2s;
}
.card:hover { border-color: var(--accent); }

/* === Dashboard Stats === */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem 1.5rem;
    box-shadow: var(--shadow);
}
.stat-value {
    font-size: 2.25rem;
    font-weight: 700;
    color: var(--accent);
}
.stat-label {
    color: var(--text-muted);
    font-size: 0.85rem;
    margin-top: 0.25rem;
}

/* === Tables === */
.table-container {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow-x: auto;
    box-shadow: var(--shadow);
}
table {
    width: 100%;
    border-collapse: collapse;
}
th {
    background: var(--bg-card-alt);
    color: var(--text-muted);
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 0.75rem 1rem;
    text-align: left;
    white-space: nowrap;
    border-bottom: 2px solid var(--border);
}
td {
    padding: 0.65rem 1rem;
    border-bottom: 1px solid var(--border);
    font-size: 0.88rem;
    vertical-align: top;
    max-width: 300px;
}
tr:hover { background: rgba(255,255,255,0.02); }

/* Priority stars */
.priority-stars { color: var(--warning); letter-spacing: 1px; }

/* Stage badges */
.stage-badge {
    display: inline-block;
    padding: 0.15rem 0.6rem;
    border-radius: 4px;
    font-size: 0.78rem;
    font-weight: 600;
    white-space: nowrap;
}
.stage-badge.won { background: rgba(16,185,129,0.15); color: var(--success); }
.stage-badge.lost { background: rgba(239,68,68,0.15); color: var(--danger); }
.stage-badge.active { background: rgba(59,130,246,0.15); color: var(--accent); }
.stage-badge.draft { background: rgba(245,158,11,0.15); color: var(--warning); }

/* === Action Buttons === */
.btn {
    display: inline-block;
    padding: 0.45rem 1rem;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 600;
    border: none;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
    white-space: nowrap;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-hover); }
.btn-danger { background: var(--danger); color: #fff; }
.btn-danger:hover { background: #dc2626; }
.btn-outline {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border);
}
.btn-outline:hover { border-color: var(--accent); color: var(--text); }
.btn-sm { padding: 0.25rem 0.6rem; font-size: 0.78rem; }
.btn-group { display: flex; gap: 0.5rem; }

/* === Forms === */
.form-group { margin-bottom: 1.25rem; }
.form-group label {
    display: block;
    color: var(--text-muted);
    font-size: 0.82rem;
    font-weight: 600;
    margin-bottom: 0.35rem;
}
.form-control {
    width: 100%;
    padding: 0.6rem 0.85rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 0.9rem;
    transition: border-color 0.2s;
}
.form-control:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(59,130,246,0.2);
}
textarea.form-control { resize: vertical; min-height: 80px; }
select.form-control { cursor: pointer; }

/* === Login Page === */
.login-container {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    background: var(--bg);
    padding: 2rem;
}
.login-box {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 2.5rem 2rem;
    width: 100%;
    max-width: 400px;
    box-shadow: var(--shadow);
}
.login-box h1 {
    font-size: 1.5rem;
    color: var(--accent);
    margin-bottom: 0.25rem;
    text-align: center;
}
.login-box .subtitle {
    color: var(--text-muted);
    font-size: 0.85rem;
    text-align: center;
    margin-bottom: 2rem;
}

/* === AI Suggestions === */
.advice-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.25rem 1.5rem;
    margin-bottom: 1rem;
    box-shadow: var(--shadow);
    border-left: 4px solid var(--accent);
}
.advice-card.danger { border-left-color: var(--danger); }
.advice-card.warning { border-left-color: var(--warning); }
.advice-card.success { border-left-color: var(--success); }
.advice-card.info { border-left-color: var(--info); }
.advice-title {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.advice-detail {
    color: var(--text-muted);
    font-size: 0.88rem;
    line-height: 1.7;
    white-space: pre-line;
}

/* === Pipeline bar === */
.pipeline-bar {
    display: flex;
    height: 24px;
    border-radius: 12px;
    overflow: hidden;
    background: var(--bg);
    margin: 1rem 0;
}
.pipeline-bar .early { background: var(--warning); }
.pipeline-bar .mid { background: var(--accent); }
.pipeline-bar .late { background: var(--success); }

/* === Section headers === */
.section-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text);
    margin: 2rem 0 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}
.section-title:first-child { margin-top: 0; }

/* === Empty state === */
.empty-state {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--text-muted);
}
.empty-state .icon { font-size: 3rem; margin-bottom: 1rem; }
.empty-state p { font-size: 0.9rem; }

/* === Filters === */
.filters {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
    align-items: center;
}
.filters select, .filters input {
    padding: 0.4rem 0.75rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 0.85rem;
}

/* === Utilities === */
.text-muted { color: var(--text-muted); }
.text-danger { color: var(--danger); }
.text-warning { color: var(--warning); }
.text-success { color: var(--success); }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mb-2 { margin-bottom: 1rem; }
.mb-3 { margin-bottom: 1.5rem; }
.flex-between {
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.toolbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}
.actions-col {
    display: flex;
    gap: 0.35rem;
    flex-wrap: wrap;
}

/* === File upload === */
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: var(--radius);
    padding: 3rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: border-color 0.2s;
    margin: 1.5rem 0;
}
.upload-zone:hover { border-color: var(--accent); }
.upload-zone .icon { font-size: 2.5rem; margin-bottom: 0.5rem; }
.upload-zone p { color: var(--text-muted); font-size: 0.9rem; }
.upload-zone input[type="file"] { display: none; }

/* === Responsive === */
@media (max-width: 768px) {
    .navbar { flex-wrap: wrap; height: auto; padding: 0.75rem 1rem; gap: 0.5rem; }
    .nav-links { order: 3; width: 100%; overflow-x: auto; }
    .main-container { padding: 1rem; }
    .stats-grid { grid-template-columns: 1fr 1fr; }
    .toolbar { flex-direction: column; gap: 0.5rem; align-items: flex-start; }
}