:root {
    --primary: #0d6e3c;
    --primary-dark: #0a4f2a;
    --primary-light: #2e8b57;
    --primary-gradient: linear-gradient(135deg, #0d6e3c 0%, #0a4f2a 100%);
    --secondary: #1e3a5f;
    --accent: #f39c12;
    --danger: #e74c3c;
    --success: #27ae60;
    --warning: #f1c40f;
    --info: #3498db;
    --dark: #2c3e50;
    --light: #ecf0f1;
    --gray-50: #f8f9fa;
    --gray-100: #f1f3f5;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-600: #6c757d;
    --gray-800: #343a40;
    --white: #ffffff;
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.07);
    --shadow-lg: 0 10px 25px rgba(0,0,0,0.1);
    --shadow-xl: 0 20px 40px rgba(0,0,0,0.12);
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: linear-gradient(145deg, #f4f7fb 0%, #eef2f7 100%);
    min-height: 100vh;
    color: var(--dark);
    line-height: 1.5;
    overflow-x: hidden;
}

/* Animated Background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 80%, rgba(13,110,60,0.03) 0%, transparent 50%);
    pointer-events: none;
    z-index: 0;
}

/* Navigation */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255,255,255,0.98);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.nav-container {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 1rem;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 800;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    text-decoration: none;
    transition: var(--transition);
}

.nav-brand i {
    background: none;
    -webkit-background-clip: unset;
    color: var(--primary);
    font-size: 1.8rem;
}

.nav-brand:hover {
    transform: scale(1.02);
}

.nav-links {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
}

.nav-links a {
    color: var(--gray-800);
    text-decoration: none;
    padding: 0.6rem 1.2rem;
    border-radius: 40px;
    font-weight: 500;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 0.9rem;
}

.nav-links a i {
    font-size: 1rem;
    color: var(--primary);
}

.nav-links a:hover,
.nav-links a.active {
    background: var(--primary);
    color: white;
}

.nav-links a:hover i,
.nav-links a.active i {
    color: white;
}

/* Container */
.container {
    max-width: 1280px;
    margin: 2rem auto;
    padding: 0 2rem;
    position: relative;
    z-index: 1;
}

.page-wrapper {
    max-width: 800px;
    margin: 2rem auto;
    padding: 0 1.5rem;
}

/* Cards */
.card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    margin-bottom: 1.5rem;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    border: 1px solid rgba(0,0,0,0.05);
    animation: fadeInUp 0.5s ease backwards;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

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

/* Stats Grid */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: var(--transition);
    border-left: 4px solid var(--primary);
    box-shadow: var(--shadow-sm);
    animation: fadeInUp 0.5s ease backwards;
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-md);
}

.stat-icon {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.stat-value {
    font-size: 2rem;
    font-weight: 800;
    color: var(--primary);
    margin: 0.5rem 0;
}

.stat-label {
    color: var(--gray-600);
    font-size: 0.85rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 0.7rem 1.8rem;
    border-radius: 40px;
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-family: inherit;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-sm);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
    filter: brightness(1.05);
}

.btn-secondary {
    background: var(--gray-200);
    color: var(--gray-800);
}

.btn-secondary:hover {
    background: var(--gray-300);
    transform: translateY(-2px);
}

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

.btn-danger:hover {
    background: #c0392b;
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline:hover {
    background: var(--primary);
    color: white;
    transform: translateY(-2px);
}

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

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--gray-800);
    font-size: 0.9rem;
}

input, select, textarea {
    width: 100%;
    padding: 0.85rem 1rem;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-sm);
    font-family: inherit;
    transition: var(--transition);
    background: var(--white);
    font-size: 0.95rem;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(13,110,60,0.1);
}

.input-group {
    display: flex;
    align-items: center;
    border: 2px solid var(--gray-200);
    border-radius: var(--radius-sm);
    background: var(--white);
}

.input-group span {
    padding: 0.85rem 1rem;
    background: var(--gray-100);
    border-radius: var(--radius-sm) 0 0 var(--radius-sm);
    font-weight: 600;
    color: var(--gray-600);
}

.input-group input {
    border: none;
    flex: 1;
}

.input-group input:focus {
    box-shadow: none;
}

/* Tables */
.table-wrapper {
    overflow-x: auto;
    border-radius: var(--radius-lg);
    background: var(--white);
    box-shadow: var(--shadow-sm);
}

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

th {
    background: var(--gray-100);
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    color: var(--gray-800);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

td {
    padding: 1rem;
    border-bottom: 1px solid var(--gray-200);
}

tr:last-child td {
    border-bottom: none;
}

tr:hover {
    background: var(--gray-50);
}

/* Badges */
.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.75rem;
    border-radius: 40px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-pending {
    background: #fff3e0;
    color: #e67e22;
}

.badge-approved {
    background: #e8f8f0;
    color: var(--success);
}

.badge-rejected {
    background: #fdeaea;
    color: var(--danger);
}

/* Hero Section */
.hero {
    text-align: center;
    padding: 5rem 2rem;
    background: linear-gradient(135deg, #0d6e3c 0%, #0a4f2a 100%);
    color: white;
    border-radius: 0 0 40px 40px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.hero h1 {
    font-size: 3rem;
    margin-bottom: 1rem;
    animation: fadeInUp 0.6s ease;
}

.hero p {
    font-size: 1.2rem;
    opacity: 0.95;
    margin-bottom: 2rem;
    animation: fadeInUp 0.6s ease 0.2s backwards;
}

.hero .btn {
    animation: fadeInUp 0.6s ease 0.4s backwards;
}

/* Alerts */
.alert {
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    margin-bottom: 1.5rem;
    animation: fadeIn 0.3s ease;
}

.alert-success {
    background: #e8f8f0;
    color: var(--success);
    border-left: 4px solid var(--success);
}

.alert-error {
    background: #fdeaea;
    color: var(--danger);
    border-left: 4px solid var(--danger);
}

.alert-info {
    background: #e8f0fe;
    color: var(--info);
    border-left: 4px solid var(--info);
}

/* Receipt Card */
.receipt-card {
    background: var(--white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
}

.receipt-header {
    background: var(--primary-gradient);
    color: white;
    padding: 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.receipt-icon {
    font-size: 3rem;
}

.receipt-body {
    padding: 2rem;
}

/* File Upload */
.file-upload {
    border: 2px dashed var(--gray-300);
    border-radius: var(--radius-md);
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
    cursor: pointer;
}

.file-upload:hover {
    border-color: var(--primary);
    background: rgba(13,110,60,0.02);
}

.file-upload i {
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 1rem;
}

/* Footer */
.footer {
    text-align: center;
    padding: 2rem;
    color: var(--gray-600);
    font-size: 0.85rem;
    border-top: 1px solid var(--gray-200);
    margin-top: 3rem;
}

/* Responsive */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        padding: 1rem;
    }
    
    .nav-links {
        justify-content: center;
    }
    
    .container, .page-wrapper {
        padding: 0 1rem;
    }
    
    .hero h1 {
        font-size: 2rem;
    }
    
    .stats-grid {
        grid-template-columns: 1fr;
    }
    
    th, td {
        padding: 0.75rem;
        font-size: 0.85rem;
    }
}

/* Loading Animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 2px solid var(--gray-200);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* Floating Animation */
.floating {
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}