:root {
    --primary: #2f6bff; --primary-dark: #1a48c7; --primary-light: #6f9bff; --accent: #00e0c6;
    --success: #27ae60; --warning: #f1c40f; --danger: #e74c3c; --light: #eef2f8; --border: #dcdde1;
    --sidebar-width: 270px; --sidebar-bg: #0b1220; --sidebar-bg-2: #101b33;
    --card-bg: #ffffff; --card-border: rgba(15,23,42,0.06); --text-main: #10182b; --text-muted: #64748b;
    --shadow-soft: 0 10px 30px rgba(16,24,43,0.06); --radius-lg: 20px; --radius-md: 14px;
}
* { box-sizing: border-box; margin: 0; padding: 0; }
body {
    font-family: 'Inter', Tahoma, Geneva, Verdana, sans-serif; display: flex; height: 100vh;
    background: radial-gradient(circle at 15% 0%, rgba(47,107,255,0.06), transparent 45%),
                radial-gradient(circle at 100% 20%, rgba(0,224,198,0.05), transparent 40%), var(--light);
    color: var(--text-main); overflow: hidden;
}
.sidebar {
    width: var(--sidebar-width); background: linear-gradient(180deg, var(--sidebar-bg) 0%, var(--sidebar-bg-2) 100%);
    color: white; padding: 20px 0; display: flex; flex-direction: column; box-shadow: 2px 0 5px rgba(0,0,0,0.1);
    overflow-y: auto; overflow-x: hidden; flex-shrink: 0; border-right: 1px solid rgba(255,255,255,.04);
}
.sidebar h2 {
    font-size: 0.85rem; text-align: center; padding: 0 15px 20px; margin-bottom: 15px;
    font-family: 'Space Grotesk', sans-serif; font-weight: 600; letter-spacing: .06em; color: #e5edff;
    border-bottom: 1px solid rgba(255,255,255,.08);
}
.nav-link {
    color: rgba(255,255,255,.78); text-decoration: none; padding: 11px 20px; display: flex; align-items: center;
    transition: 0.25s ease; margin-bottom: 2px; font-size: 0.85rem; font-weight: 500; white-space: nowrap;
}
.nav-link:hover, .nav-link.active { background-color: rgba(255,255,255,0.06); color: #fff; }
.nav-link i { margin-right: 12px; width: 20px; text-align: center; font-size: 0.9rem; color: var(--accent); }
.nav-section-btn {
    background: transparent; border: none; width: 100%; padding: 12px 20px; font-size: 0.75rem; text-transform: uppercase;
    letter-spacing: 1px; color: rgba(255,255,255,0.6); text-align: left; cursor: pointer; display: flex;
    justify-content: space-between; align-items: center; border-top: 1px solid rgba(255,255,255,0.05); margin-top: 5px;
    transition: color 0.2s ease;
}
.nav-section-btn:hover { color: rgba(255,255,255,0.9); background: rgba(255,255,255,0.03); }
.dropdown-arrow { font-size: 0.75rem; transition: transform 0.3s ease; }
.dropdown-container-menu { max-height: 0; overflow: hidden; transition: max-height 0.35s ease-out; background-color: rgba(0,0,0,0.12); }
.dropdown-sidebar-container.active .dropdown-container-menu { max-height: 500px; }
.dropdown-sidebar-container.active .dropdown-arrow { transform: rotate(180deg); }

.main-content { flex: 1; overflow-y: auto; padding: 32px 36px; }
.form-container { max-width: 1400px; margin: 0 auto; }
.page-header { margin-bottom: 24px; text-align: center; }
.page-header h1 { font-family: 'Space Grotesk', sans-serif; font-weight: 700; font-size: 1.9rem; letter-spacing: -.01em; margin-bottom: 6px; }
.page-header p { color: var(--text-muted); font-size: 0.9rem; }

.form-section {
    background: var(--card-bg); padding: 28px; border-radius: var(--radius-lg); box-shadow: var(--shadow-soft);
    border: 1px solid var(--card-border); margin-bottom: 25px;
}
.form-section-title {
    font-size: 1.05rem; font-family: 'Space Grotesk', sans-serif; font-weight: 600; margin-bottom: 20px;
    padding-bottom: 10px; border-bottom: 2px solid #edf2f7; display: flex; align-items: center; gap: 10px;
}
.form-section-title i { color: var(--primary); }
.form-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; margin-bottom: 20px; }
@media (max-width: 1200px) { .form-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 900px)  { .form-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 600px)  { .form-grid { grid-template-columns: 1fr; } }
.form-group { display: flex; flex-direction: column; }
.form-group label { font-size: 0.78rem; font-weight: 700; margin-bottom: 8px; color: var(--text-muted); text-transform: uppercase; letter-spacing: .04em; }
.form-control {
    padding: 11px 14px; border: 1px solid var(--card-border); border-radius: 10px; font-size: 0.95rem; font-family: inherit;
    transition: all 0.25s; background: #f8f9fb; width: 100%; color: var(--text-main);
}
.form-control:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 3px rgba(47,107,255,0.12); background: white; }

.btn {
    display: inline-flex; align-items: center; gap: 8px; padding: 11px 20px; border: none; border-radius: 10px; cursor: pointer;
    font-family: inherit; font-weight: 600; font-size: .9rem; color: #fff; background: linear-gradient(90deg, var(--primary), var(--primary-dark));
    transition: transform .2s, box-shadow .2s;
}
.btn:hover { transform: translateY(-1px); box-shadow: 0 8px 18px rgba(47,107,255,.25); }
.btn-sm { padding: 6px 12px; font-size: .78rem; }
.btn-success { background: var(--success); } .btn-danger { background: var(--danger); } .btn-light { background: #e2e8f0; color: var(--text-main); }

.tabla-wrap { overflow-x: auto; }
table.tabla { width: 100%; border-collapse: collapse; font-size: .9rem; }
.tabla th { text-align: left; font-size: .75rem; text-transform: uppercase; letter-spacing: .05em; color: var(--text-muted); padding: 10px 12px; border-bottom: 2px solid #edf2f7; }
.tabla td { padding: 11px 12px; border-bottom: 1px solid #edf2f7; }
.tabla tr:hover td { background: rgba(47,107,255,.03); }
.badge { display: inline-block; padding: 3px 10px; border-radius: 999px; font-size: .72rem; font-weight: 700; }
.b-ok { background: rgba(39,174,96,.14); color: #1e8449; } .b-low { background: rgba(241,196,15,.2); color: #9a7d0a; }
.b-out { background: rgba(231,76,60,.14); color: #c0392b; } .b-info { background: rgba(47,107,255,.12); color: var(--primary-dark); }

.alert { padding: 12px 18px; border-radius: 10px; margin-bottom: 20px; font-size: .9rem; font-weight: 500; }
.alert-ok { background: rgba(39,174,96,.12); color: #1e8449; } .alert-error { background: rgba(231,76,60,.12); color: #c0392b; }

.buscador { position: relative; }
.buscador i { position: absolute; left: 16px; top: 50%; transform: translateY(-50%); color: var(--primary); }
.buscador input { padding-left: 44px; font-size: 1.05rem; padding-top: 14px; padding-bottom: 14px; }
.linea-pedido { display: grid; grid-template-columns: 1fr 160px 44px; gap: 12px; margin-bottom: 12px; align-items: center; }