:root {
    --bg-main: #0d1117;
    --bg-card: #161b22;
    --bg-sidebar: #010409;
    --border-color: #30363d;
    --text-primary: #f0f6fc;
    --text-secondary: #8b949e;
    --accent: #f59e0b; /* Amber */
    --accent-hover: #d97706;
    --success: #238636;
    --warning: #d29922;
    --danger: #da3633;
    --info: #388bfd;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Helvetica, Arial, sans-serif;
    --sidebar-width: 260px;
    --shadow: 0 8px 24px rgba(0, 0, 0, 0.5);
    --radius: 12px;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    -webkit-font-smoothing: antialiased;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-family);
    overflow: hidden;
    height: 100vh;
}

/* Layout */
.app-container {
    display: flex;
    height: 100vh;
}

/* Sidebar */
.sidebar {
    width: var(--sidebar-width);
    background-color: var(--bg-sidebar);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 1.5rem;
    z-index: 100;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--accent);
    margin-bottom: 3rem;
    letter-spacing: -0.5px;
}

.nav-links {
    list-style: none;
    flex: 1;
}

.nav-item {
    margin-bottom: 0.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    color: var(--text-secondary);
    text-decoration: none;
    border-radius: var(--radius);
    transition: all 0.2s ease;
    cursor: pointer;
}

.nav-link:hover, .nav-link.active {
    background-color: var(--bg-card);
    color: var(--text-primary);
}

.nav-link.active {
    border-left: 4px solid var(--accent);
    background-color: rgba(245, 158, 11, 0.1);
}

.nav-link i {
    width: 20px;
    text-align: center;
    font-size: 1.1rem;
}

/* Main Content */
.main-layout {
    flex: 1;
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

.header {
    height: 70px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    background-color: rgba(13, 17, 23, 0.8);
    backdrop-filter: blur(8px);
    z-index: 90;
}

.search-bar {
    position: relative;
    width: 400px;
}

.search-bar input {
    width: 100%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 10px 15px 10px 40px;
    color: var(--text-primary);
    outline: none;
    transition: border-color 0.2s;
}

.search-bar i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
}

.menu-toggle {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
    margin-right: 1rem;
    padding: 0.5rem;
}

.sidebar-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    z-index: 95;
    display: none;
    backdrop-filter: blur(4px);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.btn {
    padding: 10px 20px;
    border-radius: var(--radius);
    border: none;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background-color: var(--accent);
    color: #000;
}

.btn-primary:hover {
    background-color: var(--accent-hover);
    transform: translateY(-1px);
}

/* Content Area */
.content-area {
    flex: 1;
    padding: 2rem;
    overflow-y: auto;
    scroll-behavior: smooth;
}

/* Dashboard Cards */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 0.5rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
}

.stat-trend {
    font-size: 0.85rem;
    margin-top: 0.5rem;
}

.trend-up { color: #3fb950; }
.trend-down { color: #f85149; }

/* Tables */
.data-table-container {
    background-color: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
}

.table-header {
    padding: 1.5rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

table {
    width: 100%;
    border-collapse: collapse;
}

th {
    text-align: left;
    padding: 1rem 1.5rem;
    background-color: rgba(255, 255, 255, 0.02);
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

td {
    padding: 1rem 1.5rem;
    border-top: 1px solid var(--border-color);
    font-size: 0.95rem;
}

tr:hover td {
    background-color: rgba(255, 255, 255, 0.03);
}

.badge {
    padding: 4px 10px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-grand-coast { background: rgba(56, 139, 253, 0.15); color: #58a6ff; }
.badge-cao-xa-la { background: rgba(63, 185, 80, 0.15); color: #3fb950; }
.badge-the-park-land { background: rgba(163, 113, 247, 0.15); color: #bc8cff; }
.badge-aluvia { background: rgba(210, 153, 34, 0.15); color: #d29922; }

/* Modals */
.modal-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.8);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(4px);
}

.modal {
    background: var(--bg-card);
    width: 90%;
    max-width: 600px;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    padding: 2rem;
    position: relative;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 2rem;
}

.close-btn {
    cursor: pointer;
    color: var(--text-secondary);
    font-size: 1.5rem;
}

/* Form */
.form-group {
    margin-bottom: 1.5rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 10px 15px;
    color: var(--text-primary);
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: 1rem;
    margin-top: 2rem;
}

/* Utility */
.hide { display: none !important; }

/* Custom Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-sidebar); }
::-webkit-scrollbar-thumb { background: var(--border-color); border-radius: 10px; }
::-webkit-scrollbar-thumb:hover { background: var(--text-secondary); }

/* ============================================
   CASH FLOW CALCULATOR
   ============================================ */

/* KPI Row */
.cf-kpi-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1rem;
    margin-bottom: 1.5rem;
}
@media (max-width: 1100px) { .cf-kpi-row { grid-template-columns: repeat(2, 1fr); } }

.cf-kpi {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    padding: 1.2rem 1.4rem;
    transition: border-color 0.2s;
}
.cf-kpi:hover { border-color: var(--accent); }

.cf-kpi-gold {
    background: linear-gradient(135deg, rgba(245,158,11,0.12), rgba(245,158,11,0.03));
    border-color: rgba(245,158,11,0.4);
}

.cf-kpi-label {
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
}
.cf-kpi-value {
    font-size: 1.4rem;
    font-weight: 800;
    color: var(--text-primary);
    line-height: 1;
}
.cf-kpi-gold .cf-kpi-value { color: var(--accent); }
.cf-kpi-sub {
    font-size: 0.65rem;
    color: var(--accent);
    margin-top: 0.4rem;
    font-weight: 600;
}
.cf-kpi:not(.cf-kpi-gold) .cf-kpi-sub { color: var(--text-secondary); }

/* Main Layout */
.cf-grid {
    display: grid;
    grid-template-columns: 310px 1fr;
    gap: 1.5rem;
    align-items: start;
}
@media (max-width: 1000px) { .cf-grid { grid-template-columns: 1fr; } }

/* Inputs */
.cf-section-title {
    font-size: 0.72rem;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    color: var(--accent);
    margin-bottom: 1.2rem;
}
.cf-field { margin-bottom: 1.4rem; }
.cf-field:last-child { margin-bottom: 0; }
.cf-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
}
.cf-slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.4rem;
}
.cf-slider-val {
    font-size: 0.8rem;
    font-weight: 800;
    color: var(--accent);
    background: rgba(245,158,11,0.1);
    border: 1px solid rgba(245,158,11,0.25);
    padding: 0.1rem 0.5rem;
    border-radius: 0.3rem;
}
.cf-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 3px;
    border-radius: 2px;
    background: var(--border-color);
    outline: none;
    cursor: pointer;
}
.cf-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 15px; height: 15px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    box-shadow: 0 0 6px rgba(245,158,11,0.4);
}
.cf-sub-info {
    font-size: 0.65rem;
    color: #4b5563;
    margin-top: 0.35rem;
    font-style: italic;
}

/* Tabs */
.cf-tabs {
    display: flex;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: 0.5rem;
    padding: 3px;
    gap: 2px;
}
.cf-tab {
    padding: 0.35rem 1rem;
    font-size: 0.72rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: none;
    border-radius: 0.35rem;
    cursor: pointer;
    background: transparent;
    color: var(--text-secondary);
    transition: all 0.2s;
}
.cf-tab.active { background: var(--accent); color: #000; }

/* Chart Legend */
.cf-legend {
    display: flex;
    gap: 1.5rem;
    margin-top: 0.8rem;
    flex-wrap: wrap;
}
.cf-legend-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-secondary);
}
.cf-legend-dot { width: 10px; height: 10px; border-radius: 2px; }

/* SVG Tooltip */
.cf-svg-tooltip {
    position: fixed;
    background: var(--bg-card);
    border: 1px solid rgba(245,158,11,0.4);
    border-radius: var(--radius);
    padding: 0.8rem 1rem;
    font-size: 0.75rem;
    pointer-events: none;
    z-index: 9999;
    min-width: 180px;
    box-shadow: var(--shadow);
}
.cf-svg-tooltip .tt-title { color: var(--accent); font-weight: 800; margin-bottom: 0.5rem; }
.cf-svg-tooltip .tt-row { display: flex; justify-content: space-between; gap: 1rem; margin-bottom: 0.25rem; }
.cf-svg-tooltip .tt-label { color: var(--text-secondary); }
.cf-svg-tooltip .tt-val { font-weight: 700; }

/* Schedule Table */
.cf-table-wrap {
    max-height: 380px;
    overflow-y: auto;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
}
.cf-table-wrap table { margin: 0; }
.cf-table-wrap th { position: sticky; top: 0; z-index: 2; background: var(--bg-main); }
.cf-grace-row td { opacity: 0.35; }

/* ============================================
   RESPONSIVE (MOBILE & TABLET)
   ============================================ */
@media (max-width: 768px) {
    body {
        overflow: auto;
        height: auto;
    }

    .app-container {
        flex-direction: column;
        height: auto;
    }

    .sidebar {
        position: fixed;
        left: 0;
        top: 0;
        bottom: 0;
        transform: translateX(-100%);
        transition: transform 0.3s ease;
        z-index: 100;
        box-shadow: 20px 0 30px rgba(0,0,0,0.5);
    }

    .sidebar.active {
        transform: translateX(0);
    }

    .sidebar-overlay.active {
        display: block;
    }

    .main-layout {
        height: auto;
        min-height: 100vh;
    }

    .header {
        padding: 0 1rem;
        position: sticky;
        top: 0;
    }

    .menu-toggle {
        display: block;
    }

    .search-bar {
        flex: 1;
        margin-right: 0.5rem;
    }

    .search-bar input {
        font-size: 0.85rem;
    }

    .header-actions .btn {
        padding: 8px 12px;
    }

    .header-actions .btn span {
        display: none; /* Hide button text on mobile */
    }

    .content-area {
        padding: 1rem;
    }

    .stats-grid {
        grid-template-columns: 1fr;
    }

    .charts-container {
        grid-template-columns: 1fr !important;
    }

    /* Cash Flow Mobile Optimization */
    .cf-kpi-row {
        grid-template-columns: 1fr !important;
    }

    .cf-grid {
        grid-template-columns: 1fr !important;
    }

    .cf-tabs {
        width: 100%;
        justify-content: center;
    }

    /* Table Responsiveness */
    .data-table-container {
        overflow-x: auto;
    }

    table {
        min-width: 600px;
    }

    /* Modal Optimization */
    .modal {
        padding: 1.5rem;
        width: 95%;
    }

    .modal form > div {
        grid-template-columns: 1fr !important;
        gap: 0.5rem !important;
    }
}