:root {
    --bg-main: #f8fafc;
    --sidebar-bg: #0f172a;
    --card-bg: #ffffff;
    --text-main: #1e293b;
    --text-muted: #64748b;
    --primary: #4f46e5;
    --primary-hover: #4338ca;
    --border-color: #e2e8f0;

    --status-recibido: #e0f2fe;
    --status-recibido-txt: #0369a1;
    --status-revision: #fef3c7;
    --status-revision-txt: #b45309;
    --status-aprobado: #dcfce7;
    --status-aprobado-txt: #15803d;
    --status-rechazado: #fee2e2;
    --status-rechazado-txt: #b91c1c;

    --radius-lg: 16px;
    --radius-md: 10px;
    --radius-sm: 6px;
}

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

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background-color: var(--bg-main);
    color: var(--text-main);
    display: flex;
    min-height: 100vh;
}

.app-layout {
    display: flex;
    width: 100%;
}

/* Sidebar Styling */
.sidebar {
    width: 260px;
    background-color: var(--sidebar-bg);
    color: #fff;
    padding: 2rem 1.5rem;
    display: flex;
    flex-direction: column;
}

.brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 2.5rem;
}

.brand-icon {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, #6366f1, #4f46e5);
    border-radius: var(--radius-md);
    display: grid;
    place-items: center;
    font-weight: 700;
    font-size: 1.2rem;
}

.brand-title { font-weight: 700; font-size: 1.1rem; display: block; }
.brand-subtitle { font-size: 0.75rem; color: #94a3b8; }

.nav-menu { display: flex; flex-direction: column; gap: 0.5rem; }
.nav-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.75rem 1rem;
    color: #94a3b8;
    text-decoration: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    transition: all 0.2s ease;
}
.nav-item:hover, .nav-item.active {
    background-color: rgba(255, 255, 255, 0.08);
    color: #ffffff;
}

/* Main Content */
.main-content {
    flex: 1;
    padding: 2.5rem;
    overflow-y: auto;
}

.top-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
}

.page-title { font-size: 1.75rem; font-weight: 700; color: #0f172a; }
.page-desc { color: var(--text-muted); font-size: 0.9rem; margin-top: 0.25rem; }

/* KPI Cards */
.kpi-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.kpi-card {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: 0 4px 6px -1px rgba(0,0,0,0.02);
}
.kpi-label { font-size: 0.85rem; color: var(--text-muted); font-weight: 600; text-transform: uppercase; }
.kpi-value { font-size: 2rem; font-weight: 700; color: #0f172a; display: block; margin-top: 0.5rem; }

/* Cards & Forms */
.card {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    padding: 1.75rem;
    margin-bottom: 2rem;
    box-shadow: 0 10px 15px -3px rgba(0,0,0,0.03);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.form-section-title {
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin: 1.5rem 0 1rem 0;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}

.grid { display: grid; gap: 1.25rem; }
.grid-3 { grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); }
.grid-4 { grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); }

.form-group { display: flex; flex-direction: column; gap: 0.4rem; }
.form-group label { font-size: 0.85rem; font-weight: 600; color: #334155; }

input, select, textarea {
    padding: 0.75rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.9rem;
    outline: none;
    transition: border-color 0.2s ease;
}

input:focus, select:focus, textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

.input-group { display: flex; gap: 0.5rem; }

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: all 0.2s ease;
}
.btn-primary { background-color: var(--primary); color: #fff; }
.btn-primary:hover { background-color: var(--primary-hover); }
.btn-secondary { background-color: #f1f5f9; color: #475569; }
.btn-secondary:hover { background-color: #e2e8f0; }

.btn-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    color: var(--text-muted);
    cursor: pointer;
}

.resources-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1rem;
}

.resource-item {
    background: #f8fafc;
    padding: 0.75rem;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}
.resource-item input { width: 70px; text-align: center; }

/* Table Styling */
.table-responsive { overflow-x: auto; }
.custom-table { width: 100%; border-collapse: collapse; text-align: left; }
.custom-table th {
    padding: 1rem;
    font-size: 0.8rem;
    text-transform: uppercase;
    color: var(--text-muted);
    background-color: #f8fafc;
    border-bottom: 1px solid var(--border-color);
}
.custom-table td {
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.9rem;
}

.badge {
    padding: 0.35rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 700;
}
.badge-recibido { background-color: var(--status-recibido); color: var(--status-recibido-txt); }
.badge-revision { background-color: var(--status-revision); color: var(--status-revision-txt); }
.badge-aprobado { background-color: var(--status-aprobado); color: var(--status-aprobado-txt); }
.badge-rechazado { background-color: var(--status-rechazado); color: var(--status-rechazado-txt); }

.hidden { display: none; }
.form-actions { display: flex; justify-content: flex-end; gap: 1rem; margin-top: 1.5rem; }