* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Poppins', sans-serif;
}

body {
    margin: 0;
    padding: 0;
    background-color: #f5f7fa;
}

/* NavBar Background */
.topnav {
    background-color: #0f172a;
}

/* Page Content */
.page-content {
    min-height: calc(100vh - 60px);
}

:root {
    --nav-bg: #0f172a;
    --nav-surface: #111827;
    --nav-text: #e5e7eb;
    --nav-muted: #cbd5e1;
    --nav-accent: #2563eb;
    --nav-accent-strong: #1d4ed8;
    --nav-danger: #b91c1c;
    --nav-divider: rgba(255, 255, 255, 0.12);
    --page-bg: #f3f4f6;
    --card-bg: #ffffff;
    --border: #e5e7eb;
    --border-strong: #d1d5db;
    --text-primary: #0f172a;
    --text-secondary: #6b7280;
    --text-muted: #9ca3af;
    --primary: #2563eb;
    --primary-strong: #1d4ed8;
    --error-bg: #fef2f2;
    --error-border: #dc2626;
    --error-text: #b91c1c;
    --radius-lg: 18px;
    --radius-md: 12px;
    --shadow-lg: 0 18px 45px rgba(15, 23, 42, 0.15);
    --shadow-sm: 0 6px 18px rgba(15, 23, 42, 0.08);
}

/* Loading Spinner Styles */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 23, 42, 0.75);
    backdrop-filter: blur(4px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    animation: fadeIn 0.2s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.loading-spinner-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.spinner-ring {
    display: inline-block;
    position: relative;
    width: 80px;
    height: 80px;
}

.spinner-ring div {
    box-sizing: border-box;
    display: block;
    position: absolute;
    width: 64px;
    height: 64px;
    margin: 8px;
    border: 8px solid #2563eb;
    border-radius: 50%;
    animation: spinner-ring 1.2s cubic-bezier(0.5, 0, 0.5, 1) infinite;
    border-color: #2563eb transparent transparent transparent;
}

.spinner-ring div:nth-child(1) {
    animation-delay: -0.45s;
}

.spinner-ring div:nth-child(2) {
    animation-delay: -0.3s;
}

.spinner-ring div:nth-child(3) {
    animation-delay: -0.15s;
}

@keyframes spinner-ring {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.loading-message {
    color: #ffffff;
    font-size: 1.125rem;
    font-weight: 500;
    text-align: center;
    margin: 0;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.6;
    }
}