/* Global Variables */
:root {
    /* New Palette */
    --primary-green: #28a745;
    --primary-green-hover: #218838;
    --primary-blue: #0056b3;
    --primary-blue-hover: #004494;
    
    /* Theme Mappings */
    --bg-light: #F8F9FA;
    --text-black: #000000;
    --border-gray: #E0E0E0;
    
    /* Common */
    --white: #ffffff;
    --shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    --radius: 8px;
}

/* Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    background-color: var(--bg-light);
    color: var(--text-black);
}

img {
    max-width: 100%;
    height: auto;
}

a {
    text-decoration: none;
    color: inherit;
}

/* Utility Classes */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 15px;
}

.text-center { text-align: center; }
.mt-1 { margin-top: 1rem; }
.mb-1 { margin-bottom: 1rem; }
.mt-2 { margin-top: 2rem; }
.mb-2 { margin-bottom: 2rem; }

/* Buttons */
.btn {
    display: inline-block;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-weight: 600;
    transition: background 0.3s ease;
    text-align: center;
    background-color: var(--primary-green);
    color: var(--white);
}

.btn-primary {
    background-color: var(--primary-green);
    color: var(--white);
}

.btn-primary:hover, .btn:hover {
    background-color: var(--primary-green-hover);
}

.btn-admin {
    background-color: var(--primary-blue);
    color: var(--white);
}

.btn-admin:hover {
    background-color: var(--primary-blue-hover);
}

.btn-danger {
    background-color: #dc3545; /* Red as requested */
    color: var(--white);
}

.btn-danger:hover {
    background-color: #c82333;
}

/* Forms */
.form-group {
    margin-bottom: 15px;
}

.form-control {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-gray);
    border-radius: var(--radius);
    font-size: 1rem;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-green);
    box-shadow: 0 0 0 2px rgba(40, 167, 69, 0.2);
}

/* Login Page Styles */
.login-page {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    background: linear-gradient(135deg, var(--primary-blue) 0%, #000000 100%);
}

.login-container {
    background: var(--white);
    padding: 2rem;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 400px;
    text-align: center;
}

.logo-img {
    max-width: 150px;
    margin-bottom: 1.5rem;
}

/* Responsive Grid */
.grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 20px;
}

@media (min-width: 768px) {
    .grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 992px) {
    .grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

/* Navbar */
.navbar {
    background-color: var(--primary-blue);
    color: var(--white);
    padding: 1rem 0;
    box-shadow: var(--shadow);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: bold;
    display: flex;
    align-items: center;
    gap: 10px;
}

.nav-brand img {
    height: 40px;
}

.nav-links {
    display: flex;
    gap: 20px;
}

.nav-links a:hover {
    color: var(--primary-green);
}

/* Mobile Nav */
.mobile-menu-btn {
    display: none;
    background: none;
    border: none;
    color: var(--white);
    font-size: 1.5rem;
    cursor: pointer;
}

@media (max-width: 768px) {
    .mobile-menu-btn {
        display: block;
    }

    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: 70px;
        left: 0;
        width: 100%;
        background-color: var(--primary-blue);
        padding: 1rem;
        text-align: center;
    }


    .nav-links.active {
        display: flex;
    }
}

/* Admin Sidebar Layout */
.admin-layout {
    display: flex;
    min-height: 100vh;
}

.sidebar {
    width: 260px;
    background: linear-gradient(180deg, var(--primary-blue) 0%, #003366 100%);
    color: white;
    flex-shrink: 0;
    display: flex;
    flex-direction: column;
    padding: 20px;
    position: fixed;
    height: 100vh;
    overflow-y: auto;
    z-index: 1000;
    transition: transform 0.3s ease;
}

.main-content {
    flex-grow: 1;
    margin-left: 260px; /* Width of sidebar */
    padding: 30px;
    background-color: #f4f6f9;
    min-height: 100vh;
}

.sidebar-header {
    margin-bottom: 40px;
    text-align: center;
    border-bottom: 1px solid rgba(255,255,255,0.1);
    padding-bottom: 20px;
}

.sidebar-nav {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.sidebar-nav a {
    color: rgba(255,255,255,0.8);
    padding: 12px 15px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 10px;
}

.sidebar-nav a:hover, .sidebar-nav a.active {
    background: var(--primary-green);
    color: white;
    transform: translateX(5px);
}

.sidebar-footer {
    padding-top: 20px;
    border-top: 1px solid rgba(255,255,255,0.1);
}

.btn-logout-sidebar {
    display: block;
    text-align: center;
    background: #dc3545; /* Red as requested */
    color: white;
    padding: 10px;
    border-radius: 6px;
    transition: background 0.2s;
}

.btn-logout-sidebar:hover {
    background: #c82333;
}

/* Mobile Sidebar */
@media (max-width: 992px) {
    .sidebar {
        transform: translateX(-100%);
    }
    .main-content {
        margin-left: 0;
    }
    .sidebar.active {
        transform: translateX(0);
    }
}