:root {
    --primary: #0f172a;
    --primary-light: #1e293b;
    --accent: #4f46e5;
    --accent-hover: #4338ca;
    --brand-gold: #d97706;
    --brand-rose: #e11d48;
    --success: #10b981;
    --warning: #f59e0b;
    --danger: #ef4444;
    --surface: #ffffff;
    --background: #f8fafc;
    --border: #e2e8f0;
}

* {
    box-sizing: border-box;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: #0f172a;
    color: #1e293b;
    margin: 0;
    padding: 0;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==========================================================================
   TOP HEADER (DARK EXECUTIVE NAVY)
   ========================================================================== */
header {
    background: #0f172a !important;
    color: #ffffff !important;
    border-bottom: 1px solid #1e293b !important;
    box-shadow: 0 4px 20px -5px rgba(0, 0, 0, 0.3);
}

header .text-white {
    color: #ffffff !important;
}

/* ==========================================================================
   DARK SLEEK SIDEBAR NAVIGATION
   ========================================================================== */
aside,
aside.w-64 {
    background: #020617 !important;
    border-right: 1px solid #1e293b !important;
    color: #94a3b8 !important;
}

aside nav button.sidebar-btn,
aside nav button.client-sidebar-btn {
    color: #94a3b8 !important;
    background-color: transparent !important;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.6rem 0.85rem;
    border-radius: 0.75rem;
    font-size: 0.82rem;
    font-weight: 500;
    transition: all 0.2s ease;
    border: 1px solid transparent !important;
    cursor: pointer;
    text-align: left;
    width: 100%;
}

aside nav button.sidebar-btn:hover,
aside nav button.client-sidebar-btn:hover {
    color: #ffffff !important;
    background-color: rgba(30, 41, 59, 0.7) !important;
    border-color: rgba(255, 255, 255, 0.05) !important;
    transform: translateX(2px);
}

aside nav button.sidebar-btn.active,
aside nav button.client-sidebar-btn.active,
aside nav button.sidebar-btn.bg-indigo-600,
aside nav button.client-sidebar-btn.bg-indigo-600 {
    color: #ffffff !important;
    background: linear-gradient(135deg, #4f46e5 0%, #4338ca 100%) !important;
    border-color: rgba(255, 255, 255, 0.15) !important;
    font-weight: 600 !important;
    box-shadow: 0 4px 14px -2px rgba(79, 70, 229, 0.4) !important;
    transform: none;
}

aside div.uppercase {
    color: #475569 !important;
    font-size: 0.68rem !important;
    font-weight: 700 !important;
    letter-spacing: 0.08em !important;
}

/* ==========================================================================
   CRISP CLEAN WHITE MAIN WORKSPACE CANVAS
   ========================================================================== */
main {
    background-color: #f8fafc !important;
    color: #0f172a;
}

/* Specific Headings in Main (excluding banners) */
main > section h2:not(.text-white),
main div:not(.hero-banner):not(.bg-gradient-to-r) > h2:not(.text-white),
main h3:not(.text-white),
main h4:not(.text-white) {
    color: #0f172a;
    font-weight: 800;
}

/* Hero / Welcome Banner */
.hero-banner,
.bg-gradient-to-r {
    background: linear-gradient(135deg, #0f172a 0%, #1e1b4b 50%, #312e81 100%) !important;
    border: 1px solid rgba(255, 255, 255, 0.12) !important;
    border-radius: 1.25rem !important;
    box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.25) !important;
}

.hero-banner *,
.bg-gradient-to-r h2,
.bg-gradient-to-r p,
.bg-gradient-to-r span {
    color: #ffffff !important;
}

.hero-banner p,
.bg-gradient-to-r p {
    color: #c7d2fe !important;
}

/* Elevated White Cards */
main div.bg-white,
main section div.bg-white {
    background-color: #ffffff !important;
    border: 1px solid #e2e8f0;
    border-radius: 1rem;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.03), 0 1px 2px 0 rgba(0, 0, 0, 0.02);
}

/* Metric / KPI Card Styling */
.kpi-card {
    background: #ffffff !important;
    border: 1px solid #e2e8f0 !important;
    border-radius: 1rem !important;
    padding: 1.25rem !important;
    box-shadow: 0 1px 3px 0 rgba(0, 0, 0, 0.03) !important;
    transition: all 0.2s ease !important;
}

.kpi-card:hover {
    border-color: #cbd5e1 !important;
    box-shadow: 0 8px 20px -4px rgba(0, 0, 0, 0.06) !important;
    transform: translateY(-2px) !important;
}

/* Data Tables */
main table {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
}

main table thead {
    background-color: #f8fafc !important;
    color: #475569 !important;
    border-bottom: 1px solid #e2e8f0 !important;
}

main table thead th {
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    padding: 0.75rem 1rem;
    color: #475569 !important;
}

main table tbody tr {
    transition: background-color 0.15s ease;
}

main table tbody tr:hover {
    background-color: #f1f5f9 !important;
}

main table tbody td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid #f1f5f9;
}

/* Buttons */
.btn-primary {
    background: linear-gradient(135deg, #4f46e5 0%, #4338ca 100%) !important;
    color: #ffffff !important;
    font-weight: 700 !important;
    border-radius: 0.75rem !important;
    padding: 0.55rem 1rem !important;
    border: none !important;
    box-shadow: 0 4px 12px rgba(79, 70, 229, 0.3) !important;
    cursor: pointer !important;
    transition: all 0.2s ease !important;
}

.btn-primary:hover {
    filter: brightness(1.08) !important;
    transform: translateY(-1px) !important;
}

.btn-gold {
    background: linear-gradient(135deg, #f59e0b 0%, #d97706 100%) !important;
    color: #0f172a !important;
    font-weight: 800 !important;
    border-radius: 0.75rem !important;
    padding: 0.55rem 1rem !important;
    border: none !important;
    box-shadow: 0 4px 12px rgba(217, 119, 6, 0.35) !important;
    cursor: pointer !important;
    transition: all 0.2s ease !important;
}

.btn-gold:hover {
    filter: brightness(1.08) !important;
    transform: translateY(-1px) !important;
}

/* Forms & Inputs */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="number"],
input[type="date"],
select,
textarea {
    border: 1px solid #cbd5e1 !important;
    border-radius: 0.65rem !important;
    padding: 0.5rem 0.75rem !important;
    transition: all 0.2s ease !important;
}

input:focus,
select:focus,
textarea:focus {
    border-color: #4f46e5 !important;
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.12) !important;
    outline: none !important;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}
::-webkit-scrollbar-track {
    background: #f1f5f9;
}
::-webkit-scrollbar-thumb {
    background: #cbd5e1;
    border-radius: 9999px;
}
::-webkit-scrollbar-thumb:hover {
    background: #94a3b8;
}

/* Toast Notifications */
#toast-container {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 99999;
    display: flex;
    flex-direction: column;
    gap: 10px;
    max-width: 400px;
}

.toast {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px 16px;
    background: #0f172a;
    color: #ffffff;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.3), 0 8px 10px -6px rgba(0, 0, 0, 0.3);
    font-size: 0.85rem;
    font-weight: 500;
}

.toast-success {
    border-left: 4px solid #10b981;
}

.toast-error {
    border-left: 4px solid #ef4444;
}

.toast-info {
    border-left: 4px solid #4f46e5;
}