/* ================================================================
   SAPPHIRE RESIDENCE TEGAL
   Sistem Pendukung Pengambilan Keputusan
   ================================================================ */

:root {
    --color-bg: #f5f6f8;
    --color-surface: #ffffff;
    --color-surface-alt: #f9fafb;
    --color-border: #e5e7eb;
    --color-border-light: #f0f1f3;

    --color-text: #1a1d23;
    --color-text-secondary: #5f6777;
    --color-text-muted: #9ca3af;

    --color-primary: #1e3a5f;
    --color-primary-light: #2a5a8f;
    --color-primary-subtle: #e8eef6;

    --color-accent: #0d7c66;
    --color-accent-light: #10a37f;
    --color-accent-subtle: #e6f5f0;

    --color-danger: #b91c1c;
    --color-danger-subtle: #fef2f2;
    --color-warning: #92400e;
    --color-warning-subtle: #fffbeb;
    --color-info: #1e40af;
    --color-info-subtle: #eff6ff;

    --sidebar-width: 260px;
    --sidebar-bg: #111827;
    --sidebar-text: #9ca3af;
    --sidebar-text-active: #ffffff;
    --sidebar-accent: #3b82f6;

    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;
    --radius-xl: 20px;

    --shadow-sm: 0 1px 2px rgba(0,0,0,0.04);
    --shadow-md: 0 2px 8px rgba(0,0,0,0.06);
    --shadow-lg: 0 8px 24px rgba(0,0,0,0.08);

    --font-sans: 'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    --transition: 200ms ease;
}


/* ================================================================
   RESET & BASE
   ================================================================ */

*, *::before, *::after {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: var(--font-sans);
    font-size: 14px;
    line-height: 1.6;
    color: var(--color-text);
    background: var(--color-bg);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

h1, h2, h3, h4, h5, h6 {
    font-weight: 700;
    line-height: 1.3;
    margin: 0 0 0.5rem 0;
    color: var(--color-text);
    letter-spacing: -0.01em;
}

h1 { font-size: 1.75rem; }
h2 { font-size: 1.375rem; }
h3 { font-size: 1.125rem; }
h4 { font-size: 1rem; }

p { margin: 0 0 1rem 0; }

a {
    color: var(--color-primary-light);
    text-decoration: none;
    transition: color var(--transition);
}

a:hover { color: var(--color-primary); }


/* ================================================================
   SIDEBAR
   ================================================================ */

.sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--sidebar-bg);
    display: flex;
    flex-direction: column;
    z-index: 1000;
    transition: transform 300ms ease;
}

.sidebar-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px 16px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
}

.sidebar-brand a {
    display: block;
    line-height: 0;
}

.brand-logo {
    width: 100%;
    max-width: 180px;
    height: auto;
    display: block;
    object-fit: contain;
}

.sidebar-nav {
    flex: 1;
    padding: 16px 12px;
    overflow-y: auto;
}

.nav-section-label {
    display: block;
    font-size: 10px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: rgba(255,255,255,0.25);
    padding: 0 12px;
    margin-bottom: 8px;
}

.sidebar-nav .nav-link {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 10px 12px;
    border-radius: var(--radius-sm);
    color: var(--sidebar-text);
    font-size: 13.5px;
    font-weight: 500;
    transition: all var(--transition);
    margin-bottom: 2px;
    text-decoration: none;
}

.sidebar-nav .nav-link i {
    font-size: 17px;
    width: 22px;
    text-align: center;
    flex-shrink: 0;
}

.sidebar-nav .nav-link:hover {
    color: var(--sidebar-text-active);
    background: rgba(255,255,255,0.06);
}

.sidebar-nav .nav-link.active {
    color: var(--sidebar-text-active);
    background: rgba(59, 130, 246, 0.15);
}

.sidebar-nav .nav-link.active i {
    color: var(--sidebar-accent);
}

.sidebar-footer {
    padding: 16px 20px;
    border-top: 1px solid rgba(255,255,255,0.06);
}

.footer-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 6px;
}

.footer-info:last-child { margin-bottom: 0; }

.footer-label {
    font-size: 11px;
    color: rgba(255,255,255,0.3);
    font-weight: 500;
}

.footer-value {
    font-size: 11px;
    color: rgba(255,255,255,0.55);
    font-weight: 500;
    font-family: var(--font-mono);
}


/* ================================================================
   MOBILE HEADER
   ================================================================ */

.mobile-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 56px;
    background: var(--sidebar-bg);
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 16px;
    z-index: 999;
}

.btn-toggle {
    background: none;
    border: none;
    color: #fff;
    font-size: 22px;
    padding: 4px;
    cursor: pointer;
}

/* mobile-brand removed — using logo image instead */

.sidebar-overlay {
    position: fixed;
    inset: 0;
    background: rgba(0,0,0,0.5);
    z-index: 999;
    display: none;
}

.sidebar.show ~ .sidebar-overlay {
    display: block;
}

@media (max-width: 991.98px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .sidebar.show {
        transform: translateX(0);
    }
    .main-content {
        margin-left: 0 !important;
        padding-top: 72px !important;
    }
}


/* ================================================================
   MAIN CONTENT
   ================================================================ */

.main-content {
    margin-left: var(--sidebar-width);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.content-wrapper {
    flex: 1;
    padding: 32px;
    max-width: 1200px;
    width: 100%;
}

@media (max-width: 767.98px) {
    .content-wrapper {
        padding: 20px 16px;
    }
}


/* ================================================================
   PAGE HEADER
   ================================================================ */

.page-header {
    margin-bottom: 28px;
}

.page-header h1 {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--color-text);
    margin-bottom: 4px;
    letter-spacing: -0.025em;
}

.page-header .page-subtitle {
    font-size: 13.5px;
    color: var(--color-text-secondary);
    font-weight: 400;
    line-height: 1.5;
}


/* ================================================================
   CARDS
   ================================================================ */

.card-panel {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
    overflow: hidden;
}

.card-panel-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--color-border-light);
}

.card-panel-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: -0.01em;
}

.card-panel-badge {
    font-size: 11px;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: 100px;
    background: var(--color-primary-subtle);
    color: var(--color-primary);
}


/* ================================================================
   STAT CARDS
   ================================================================ */

.stat-card {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 14px 16px;
    transition: box-shadow var(--transition);
    overflow: hidden;
    min-width: 0;
}

.stat-card:hover {
    box-shadow: var(--shadow-md);
}

.stat-label {
    font-size: 10.5px;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 6px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.stat-value {
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--color-text);
    letter-spacing: -0.02em;
    font-family: var(--font-sans);
    word-break: break-all;
    overflow-wrap: break-word;
    line-height: 1.3;
}

.stat-value.value-success { color: var(--color-accent); }
.stat-value.value-danger { color: var(--color-danger); }
.stat-value.value-primary { color: var(--color-primary-light); }

.stat-sub {
    font-size: 11px;
    color: var(--color-text-secondary);
    margin-top: 4px;
    font-weight: 400;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}


/* ================================================================
   FORMS
   ================================================================ */

.form-label {
    font-size: 12.5px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 5px;
    letter-spacing: -0.005em;
}

.form-control, .form-select {
    font-family: var(--font-sans);
    font-size: 13.5px;
    font-weight: 500;
    padding: 9px 12px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background: var(--color-surface);
    color: var(--color-text);
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-control:focus, .form-select:focus {
    border-color: var(--color-primary-light);
    box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.08);
    outline: none;
}

.form-control::placeholder {
    color: var(--color-text-muted);
    font-weight: 400;
}

.form-hint {
    font-size: 11.5px;
    color: var(--color-text-muted);
    margin-top: 4px;
    font-weight: 400;
}

.input-group-text {
    font-size: 13px;
    font-weight: 600;
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
}


/* ================================================================
   BUTTONS
   ================================================================ */

.btn-primary-custom {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 12px 20px;
    font-family: var(--font-sans);
    font-size: 13.5px;
    font-weight: 700;
    color: #fff;
    background: var(--color-primary);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
    letter-spacing: -0.005em;
}

.btn-primary-custom:hover {
    background: var(--color-primary-light);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-primary-custom:active {
    transform: translateY(0);
}

.btn-outline-custom {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    padding: 10px 20px;
    font-family: var(--font-sans);
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text);
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition);
}

.btn-outline-custom:hover {
    background: var(--color-surface-alt);
    border-color: var(--color-text-muted);
}


/* ================================================================
   RESULT SECTION
   ================================================================ */

.result-block {
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    margin-bottom: 20px;
    box-shadow: var(--shadow-sm);
}

.result-header {
    padding: 20px 24px;
    background: var(--color-primary);
    color: #fff;
}

.result-header .result-label {
    font-size: 11.5px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    opacity: 0.7;
    margin-bottom: 4px;
}

.result-header .result-price {
    font-size: 1.75rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.result-header .result-note {
    font-size: 12px;
    font-weight: 400;
    opacity: 0.65;
    margin-top: 4px;
}

.result-body {
    padding: 24px;
}


/* ================================================================
   TABLES
   ================================================================ */

.table-custom {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    table-layout: auto;
}

.table-custom thead th {
    font-size: 10.5px;
    font-weight: 700;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    padding: 10px 12px;
    border-bottom: 2px solid var(--color-border);
    text-align: left;
    white-space: nowrap;
}

.table-custom tbody td {
    padding: 10px 12px;
    border-bottom: 1px solid var(--color-border-light);
    color: var(--color-text);
    font-weight: 500;
    vertical-align: middle;
    max-width: 200px;
    overflow: hidden;
    text-overflow: ellipsis;
}

.table-custom tbody tr:last-child td {
    border-bottom: none;
}

.table-custom tbody tr:hover {
    background: var(--color-surface-alt);
}

.table-custom .cell-mono {
    font-family: var(--font-mono);
    font-size: 12px;
    font-weight: 500;
    white-space: nowrap;
}

.table-custom .cell-right {
    text-align: right;
}


/* ================================================================
   STATUS BADGES
   ================================================================ */

.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 11.5px;
    font-weight: 700;
    padding: 4px 12px;
    border-radius: 100px;
    letter-spacing: 0.01em;
}

.status-badge.badge-success {
    background: var(--color-accent-subtle);
    color: var(--color-accent);
}

.status-badge.badge-danger {
    background: var(--color-danger-subtle);
    color: var(--color-danger);
}

.status-badge.badge-warning {
    background: var(--color-warning-subtle);
    color: var(--color-warning);
}

.status-badge.badge-info {
    background: var(--color-info-subtle);
    color: var(--color-info);
}


/* ================================================================
   KPR TENOR CARDS
   ================================================================ */

.tenor-card {
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 14px 10px;
    text-align: center;
    transition: all var(--transition);
    overflow: hidden;
    min-width: 0;
}

.tenor-card:hover {
    border-color: var(--color-primary-light);
    box-shadow: var(--shadow-sm);
}

.tenor-label {
    font-size: 10px;
    font-weight: 600;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.04em;
    margin-bottom: 6px;
}

.tenor-value {
    font-size: 0.95rem;
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: -0.02em;
    font-family: var(--font-sans);
    word-break: break-all;
    overflow-wrap: break-word;
    line-height: 1.3;
}

.tenor-sub {
    font-size: 10px;
    color: var(--color-text-secondary);
    margin-top: 4px;
}


/* ================================================================
   METRIC COMPARISON
   ================================================================ */

.metric-highlight {
    background: var(--color-accent-subtle);
    border: 1px solid rgba(13, 124, 102, 0.15);
}

.optimizer-tag {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    font-size: 12px;
    font-weight: 600;
    padding: 3px 10px;
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
}

.optimizer-tag.tag-adam { background: #ede9fe; color: #5b21b6; }
.optimizer-tag.tag-sgd { background: #fef3c7; color: #92400e; }
.optimizer-tag.tag-lbfgs { background: #d1fae5; color: #065f46; }


/* ================================================================
   CHART CONTAINER
   ================================================================ */

.chart-container {
    position: relative;
    width: 100%;
    padding: 12px;
}

.chart-container canvas {
    width: 100% !important;
}


/* ================================================================
   DSR INFO
   ================================================================ */

.dsr-info {
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    line-height: 1.6;
    font-weight: 500;
}

.dsr-info.dsr-success {
    background: var(--color-accent-subtle);
    color: #065f46;
    border-left: 3px solid var(--color-accent);
}

.dsr-info.dsr-warning {
    background: var(--color-warning-subtle);
    color: var(--color-warning);
    border-left: 3px solid #f59e0b;
}

.dsr-info.dsr-danger {
    background: var(--color-danger-subtle);
    color: var(--color-danger);
    border-left: 3px solid var(--color-danger);
}


/* ================================================================
   SECTION DIVIDER
   ================================================================ */

.section-divider {
    height: 1px;
    background: var(--color-border-light);
    margin: 20px 0;
}


/* ================================================================
   ERROR
   ================================================================ */

.error-block {
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    background: var(--color-danger-subtle);
    color: var(--color-danger);
    font-size: 13px;
    font-weight: 500;
    border-left: 3px solid var(--color-danger);
    margin-bottom: 20px;
}


/* ================================================================
   FOOTER
   ================================================================ */

.main-footer {
    padding: 20px 32px;
    border-top: 1px solid var(--color-border-light);
    margin-top: auto;
}

.footer-inner {
    font-size: 12px;
    color: var(--color-text-muted);
    font-weight: 400;
}

.footer-divider {
    margin: 0 8px;
    opacity: 0.4;
}


/* ================================================================
   PRINT STYLES
   ================================================================ */

@media print {
    .sidebar, .mobile-header, .sidebar-overlay,
    .no-print, .main-footer {
        display: none !important;
    }

    .main-content {
        margin-left: 0 !important;
    }

    .content-wrapper {
        padding: 0 !important;
        max-width: none !important;
    }

    .card-panel, .result-block {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
        break-inside: avoid;
    }

    body {
        background: #fff;
        font-size: 12px;
    }
}


/* ================================================================
   UTILITIES
   ================================================================ */

.text-mono { font-family: var(--font-mono); }
.text-muted-custom { color: var(--color-text-muted); }
.text-secondary-custom { color: var(--color-text-secondary); }
.fw-800 { font-weight: 800; }
.fs-sm { font-size: 12.5px; }
.fs-xs { font-size: 11.5px; }
.ls-tight { letter-spacing: -0.02em; }
.gap-12 { gap: 12px; }
.gap-16 { gap: 16px; }
.gap-20 { gap: 20px; }