/* ===================================================================
   SISTEM PENDUKUNG KEPUTUSAN AHP - FLAT UI PROFESIONAL
   Warna Solid, Rapi, Bersih, Modern, Mobile-Responsive & Print-Ready
   =================================================================== */

:root {
    /* Solid Color Palette */
    --flat-primary: #1d4ed8;       /* Solid Royal Blue */
    --flat-primary-dark: #1e3a8a;  /* Solid Deep Navy */
    --flat-primary-light: #3b82f6; /* Solid Bright Blue */
    --flat-primary-bg: #eff6ff;    /* Soft Tint */

    --flat-slate-dark: #0f172a;    /* Solid Dark Slate for Sidebar */
    --flat-slate-card: #1e293b;    /* Sidebar item active/hover */
    --flat-slate-border: #334155;  /* Sidebar border */

    --flat-success: #059669;       /* Solid Emerald Green */
    --flat-success-bg: #ecfdf5;
    --flat-success-border: #a7f3d0;

    --flat-warning: #d97706;       /* Solid Amber */
    --flat-warning-bg: #fffbeb;
    --flat-warning-border: #fde68a;

    --flat-danger: #dc2626;        /* Solid Crimson Red */
    --flat-danger-bg: #fef2f2;
    --flat-danger-border: #fecaca;

    --flat-info: #0284c7;          /* Solid Sky Cyan */
    --flat-info-bg: #f0f9ff;
    --flat-info-border: #bae6fd;

    --flat-purple: #7c3aed;        /* Solid Purple */
    --flat-purple-bg: #f5f3ff;

    --flat-teal: #0d9488;          /* Solid Teal */
    --flat-teal-bg: #f0fdfa;

    /* Neutrals */
    --bg-main: #f8fafc;            /* Clean light grey-slate canvas */
    --bg-card: #ffffff;
    --border-light: #e2e8f0;       /* Crisp 1px solid border */
    --border-medium: #cbd5e1;

    --text-primary: #0f172a;       /* High-contrast crisp text */
    --text-secondary: #475569;
    --text-muted: #64748b;
    --text-light: #94a3b8;

    --sidebar-width: 255px;
    --border-radius: 8px;          /* Clean architectural radius */
    --border-radius-sm: 6px;
    --border-radius-lg: 10px;
}

/* Base Reset & Typography */
body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    color: var(--text-primary);
    background-color: var(--bg-main);
    min-height: 100vh;
    font-size: 0.925rem;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

/* ---------------- LAYOUT & SIDEBAR ---------------- */
.app-wrapper {
    display: flex;
    min-height: 100vh;
    width: 100%;
}

.app-sidebar {
    width: var(--sidebar-width);
    background-color: var(--flat-slate-dark);
    color: #e2e8f0;
    display: flex;
    flex-direction: column;
    flex-shrink: 0;
    border-right: 1px solid #1e293b;
    z-index: 1050;
    transition: left 0.25s ease-in-out;
}

.sidebar-header {
    padding: 1.15rem 1.25rem;
    border-bottom: 1px solid #1e293b;
    background-color: #0b1120;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    color: #ffffff;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.1rem;
}

.sidebar-brand .brand-icon {
    width: 36px;
    height: 36px;
    border-radius: var(--border-radius-sm);
    background-color: var(--flat-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: #ffffff;
    font-weight: 800;
    font-size: 1.15rem;
}

.sidebar-menu {
    padding: 0.85rem 0.65rem;
    flex-grow: 1;
    overflow-y: auto;
}

.menu-category {
    font-size: 0.68rem;
    text-transform: uppercase;
    font-weight: 700;
    letter-spacing: 0.08em;
    color: #64748b;
    padding: 0.75rem 0.75rem 0.25rem;
    margin-top: 0.4rem;
}

.nav-link-custom {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 0.75rem;
    color: #94a3b8;
    text-decoration: none;
    border-radius: var(--border-radius-sm);
    font-size: 0.875rem;
    font-weight: 500;
    transition: background-color 0.15s ease, color 0.15s ease;
    margin-bottom: 0.15rem;
}

.nav-link-custom:hover {
    color: #ffffff;
    background-color: #1e293b;
}

.nav-link-custom.active {
    color: #ffffff;
    background-color: var(--flat-primary);
    font-weight: 600;
}

.nav-link-custom i {
    font-size: 1.05rem;
    width: 20px;
    text-align: center;
}

.sidebar-footer {
    padding: 0.85rem 1.25rem;
    border-top: 1px solid #1e293b;
    background-color: #0b1120;
}

.sidebar-backdrop {
    display: none;
}

/* ---------------- MAIN CONTENT AREA ---------------- */
.app-main {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.app-topbar {
    height: 60px;
    background-color: #ffffff;
    border-bottom: 1px solid var(--border-light);
    padding: 0 1.75rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 900;
}

.content-body {
    padding: 1.5rem 1.75rem;
    flex-grow: 1;
}

/* ---------------- FLAT CARDS & METRICS ---------------- */
.card-stat {
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius);
    background: #ffffff;
    transition: border-color 0.15s ease;
    overflow: hidden;
    position: relative;
}

.card-stat:hover {
    border-color: var(--border-medium);
}

/* Solid accent border on left */
.card-stat.border-accent-primary { border-left: 4px solid var(--flat-primary) !important; }
.card-stat.border-accent-success { border-left: 4px solid var(--flat-success) !important; }
.card-stat.border-accent-warning { border-left: 4px solid var(--flat-warning) !important; }
.card-stat.border-accent-danger  { border-left: 4px solid var(--flat-danger) !important; }
.card-stat.border-accent-info    { border-left: 4px solid var(--flat-info) !important; }
.card-stat.border-accent-purple  { border-left: 4px solid var(--flat-purple) !important; }

.stat-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--border-radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.35rem;
    flex-shrink: 0;
}

.stat-icon.primary { background-color: var(--flat-primary-bg); color: var(--flat-primary); }
.stat-icon.success { background-color: var(--flat-success-bg); color: var(--flat-success); }
.stat-icon.warning { background-color: var(--flat-warning-bg); color: var(--flat-warning); }
.stat-icon.danger  { background-color: var(--flat-danger-bg);  color: var(--flat-danger); }
.stat-icon.info    { background-color: var(--flat-info-bg);    color: var(--flat-info); }
.stat-icon.purple  { background-color: var(--flat-purple-bg);  color: var(--flat-purple); }

.card-custom {
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius);
    background: #ffffff;
    margin-bottom: 1.25rem;
}

.card-custom .card-header {
    background-color: #ffffff;
    border-bottom: 1px solid var(--border-light);
    padding: 0.95rem 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.card-custom .card-body {
    padding: 1.25rem;
}

/* ---------------- FLAT TABLES ---------------- */
.table-custom {
    width: 100%;
    margin-bottom: 0;
    border-collapse: separate;
    border-spacing: 0;
}

.table-custom th {
    background-color: #f1f5f9;
    color: var(--text-secondary);
    font-weight: 600;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 0.75rem 1rem;
    border-bottom: 1px solid var(--border-medium);
}

.table-custom td {
    padding: 0.75rem 1rem;
    vertical-align: middle;
    border-bottom: 1px solid var(--border-light);
    font-size: 0.9rem;
}

.table-custom tbody tr:hover {
    background-color: #f8fafc;
}

.table-responsive {
    -webkit-overflow-scrolling: touch;
}

/* ---------------- SOLID BADGES ---------------- */
.badge-consistent {
    background-color: var(--flat-success);
    color: #ffffff;
    padding: 0.35rem 0.65rem;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-size: 0.8rem;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.badge-inconsistent {
    background-color: var(--flat-danger);
    color: #ffffff;
    padding: 0.35rem 0.65rem;
    border-radius: var(--border-radius-sm);
    font-weight: 600;
    font-size: 0.8rem;
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
}

.badge-medal-1 {
    background-color: var(--flat-warning);
    color: #ffffff;
    font-weight: 700;
    padding: 0.35rem 0.65rem;
    border-radius: var(--border-radius-sm);
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
}

.badge-flat-primary { background-color: var(--flat-primary) !important; color: #ffffff !important; }
.badge-flat-success { background-color: var(--flat-success) !important; color: #ffffff !important; }
.badge-flat-warning { background-color: var(--flat-warning) !important; color: #ffffff !important; }
.badge-flat-danger  { background-color: var(--flat-danger) !important; color: #ffffff !important; }
.badge-flat-dark    { background-color: var(--flat-dark) !important; color: #ffffff !important; }
.badge-flat-slate   { background-color: var(--flat-slate) !important; color: #ffffff !important; }
.badge-flat-light   { background-color: #f1f5f9 !important; color: var(--text-primary) !important; border: 1px solid var(--border-light) !important; }

/* ---------------- FLAT TABS & PILLS ---------------- */
.nav-tabs {
    border-bottom: 2px solid var(--border-light);
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
    gap: 0.35rem;
}

.nav-tabs::-webkit-scrollbar {
    height: 4px;
}

.nav-tabs::-webkit-scrollbar-thumb {
    background: var(--border-medium);
    border-radius: 2px;
}

.nav-tabs .nav-link {
    border: 1px solid transparent;
    border-bottom: none;
    color: var(--text-secondary);
    font-weight: 500;
    padding: 0.65rem 1.15rem;
    border-radius: var(--border-radius-sm) var(--border-radius-sm) 0 0;
    background: transparent;
    transition: all 0.15s ease;
    white-space: nowrap;
}

.nav-tabs .nav-link:hover {
    border-color: var(--border-light) var(--border-light) transparent;
    color: var(--flat-primary);
    background-color: #f8fafc;
}

.nav-tabs .nav-link.active {
    color: var(--flat-primary) !important;
    background-color: #ffffff !important;
    border-color: var(--border-light) var(--border-light) #ffffff !important;
    border-top: 3px solid var(--flat-primary) !important;
    font-weight: 600;
}

.nav-pills {
    display: flex;
    flex-wrap: nowrap;
    overflow-x: auto;
    white-space: nowrap;
    -webkit-overflow-scrolling: touch;
    gap: 0.35rem;
}

.nav-pills .nav-link {
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-light);
    color: var(--text-primary);
    font-weight: 500;
    background: #ffffff;
    padding: 0.5rem 0.85rem;
    transition: all 0.15s ease;
    white-space: nowrap;
}

.nav-pills .nav-link:hover {
    border-color: var(--flat-primary);
    color: var(--flat-primary);
}

.nav-pills .nav-link.active {
    background-color: var(--flat-primary) !important;
    border-color: var(--flat-primary) !important;
    color: #ffffff !important;
    font-weight: 600;
}

/* ---------------- FLAT WORKFLOW STEPPER ---------------- */
.workflow-stepper {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    overflow-x: auto;
    padding: 0.5rem 0;
    -webkit-overflow-scrolling: touch;
}

.step-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: #ffffff;
    border: 1px solid var(--border-light);
    padding: 0.5rem 0.85rem;
    border-radius: var(--border-radius-sm);
    font-size: 0.82rem;
    font-weight: 500;
    white-space: nowrap;
    color: var(--text-secondary);
    text-decoration: none;
    transition: all 0.15s ease;
    flex-shrink: 0;
}

.step-item:hover {
    border-color: var(--flat-primary);
    color: var(--flat-primary);
}

.step-item.active {
    background-color: var(--flat-primary);
    border-color: var(--flat-primary);
    color: #ffffff;
    font-weight: 600;
}

.step-item.active .step-number {
    background-color: #ffffff;
    color: var(--flat-primary);
}

.step-item.completed {
    background-color: var(--flat-success-bg);
    border-color: var(--flat-success-border);
    color: var(--flat-success);
}

.step-item.completed .step-number {
    background-color: var(--flat-success);
    color: #ffffff;
}

.step-number {
    width: 20px;
    height: 20px;
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.72rem;
    font-weight: 700;
    background-color: #e2e8f0;
    color: var(--text-secondary);
}

/* ---------------- FLAT COMPARISON MATRIX CARDS ---------------- */
.comparison-card {
    background: #ffffff;
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius);
    padding: 1.15rem;
    margin-bottom: 0.85rem;
    transition: border-color 0.15s ease;
}

.comparison-card:hover {
    border-color: var(--flat-primary);
}

.comparison-scale-badge {
    font-size: 0.8rem;
    background-color: #f1f5f9;
    padding: 0.2rem 0.5rem;
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
}

/* ---------------- FLAT HIERARCHY TREE ---------------- */
.hierarchy-tree {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
    padding: 1rem;
}

.tree-level {
    display: flex;
    justify-content: center;
    gap: 1.25rem;
    flex-wrap: wrap;
    position: relative;
    width: 100%;
}

.tree-node {
    background: #ffffff;
    border: 1px solid var(--border-light);
    border-radius: var(--border-radius);
    padding: 1rem 1.15rem;
    text-align: center;
    min-width: 175px;
    max-width: 230px;
    position: relative;
}

.tree-node.goal-node {
    border: 2px solid var(--flat-primary);
    background-color: var(--flat-primary-bg);
    color: var(--text-primary);
    max-width: 380px;
}

.tree-node.criterion-node {
    border-top: 3px solid var(--flat-primary);
    background-color: #ffffff;
}

.tree-node.alternative-node {
    border-top: 3px solid var(--flat-success);
    background-color: #ffffff;
}

.tree-connector-down {
    width: 2px;
    height: 20px;
    background-color: #cbd5e1;
    margin: 0 auto;
}

/* ---------------- BUTTONS FLAT UI ---------------- */
.btn {
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    font-size: 0.875rem;
    padding: 0.45rem 0.95rem;
    transition: background-color 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
    background-color: var(--flat-primary);
    border-color: var(--flat-primary);
    color: #ffffff;
}
.btn-primary:hover {
    background-color: var(--flat-primary-dark);
    border-color: var(--flat-primary-dark);
}

.btn-success {
    background-color: var(--flat-success);
    border-color: var(--flat-success);
    color: #ffffff;
}
.btn-success:hover {
    background-color: #047857;
    border-color: #047857;
}

.btn-outline-primary {
    color: var(--flat-primary);
    border-color: var(--flat-primary);
}
.btn-outline-primary:hover {
    background-color: var(--flat-primary);
    border-color: var(--flat-primary);
    color: #ffffff;
}

/* ---------------- MOBILE RESPONSIVE MEDIA QUERIES ---------------- */
@media (max-width: 991.98px) {
    .app-sidebar {
        position: fixed !important;
        top: 0 !important;
        left: -290px !important;
        bottom: 0 !important;
        width: 275px !important;
        max-width: 86vw !important;
        height: 100vh !important;
        height: 100dvh !important;
        z-index: 1060 !important;
        box-shadow: 4px 0 25px rgba(0, 0, 0, 0.45) !important;
        transition: left 0.25s cubic-bezier(0.4, 0, 0.2, 1) !important;
    }

    .app-sidebar.show {
        left: 0 !important;
    }

    .sidebar-backdrop {
        display: none;
        position: fixed !important;
        top: 0 !important;
        left: 0 !important;
        right: 0 !important;
        bottom: 0 !important;
        width: 100vw !important;
        height: 100vh !important;
        height: 100dvh !important;
        background-color: rgba(15, 23, 42, 0.65) !important;
        backdrop-filter: blur(2px);
        -webkit-backdrop-filter: blur(2px);
        z-index: 1050 !important;
        cursor: pointer;
    }

    .sidebar-backdrop.show {
        display: block !important;
    }

    .app-topbar {
        padding: 0 1rem;
        height: 56px;
    }

    .content-body {
        padding: 1rem 0.85rem;
    }

    .border-end-md {
        border-right: none !important;
        border-bottom: 1px solid var(--border-light);
        padding-bottom: 1rem;
    }

    .tree-node {
        min-width: 140px;
        max-width: 100%;
        width: 100%;
    }

    .tree-node.goal-node {
        max-width: 100%;
    }
}

@media (max-width: 575.98px) {
    body {
        font-size: 0.875rem;
    }

    .app-topbar {
        padding: 0 0.75rem;
    }

    .content-body {
        padding: 0.85rem 0.5rem;
    }

    .stat-icon {
        width: 38px;
        height: 38px;
        font-size: 1.15rem;
    }

    .card-custom .card-header {
        padding: 0.75rem 1rem;
    }

    .card-custom .card-body {
        padding: 0.85rem;
    }

    .btn {
        padding: 0.35rem 0.75rem;
        font-size: 0.82rem;
    }

    .table-custom th,
    .table-custom td {
        padding: 0.6rem 0.75rem;
        font-size: 0.82rem;
    }

    .nav-tabs .nav-link {
        padding: 0.45rem 0.65rem;
        font-size: 0.8rem;
    }
}

/* ---------------- PRINT STYLESHEET ---------------- */
@media print {
    body {
        background-color: #ffffff !important;
        color: #000000 !important;
        font-size: 11pt;
    }
    .app-sidebar,
    .app-topbar,
    .no-print,
    .btn,
    .nav-tabs,
    .alert,
    .sidebar-backdrop {
        display: none !important;
    }
    .app-wrapper {
        display: block !important;
    }
    .app-main {
        margin: 0 !important;
        padding: 0 !important;
    }
    .content-body {
        padding: 0 !important;
    }
    .card-custom {
        box-shadow: none !important;
        border: 1px solid #cbd5e1 !important;
        margin-bottom: 1.5rem !important;
        page-break-inside: avoid;
    }
    .table-custom th,
    .table-custom td {
        border: 1px solid #cbd5e1 !important;
        padding: 6px 8px !important;
    }
    .print-only {
        display: block !important;
    }
}

@media screen {
    .print-only {
        display: none !important;
    }
}