:root {
    --primary-green: #1e6b52;
    --secondary-green: #2d936c;
    --gold: #f9a826;
    --black: #000000;
    --yellow: #fed100;
    --light-bg: #f8f9fa;
    --dark-text: #333333;
    --border-color: #ddd;
    --shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: #f5f7fa;
    color: var(--dark-text);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background: linear-gradient(135deg, var(--primary-green), var(--secondary-green));
    color: white;
    padding: 25px 20px;
    border-radius: 0 0 10px 10px;
    box-shadow: var(--shadow);
    margin-bottom: 30px;
    position: relative;
    overflow: hidden;
}

header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 300px;
    height: 300px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    animation: float 6s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 20px;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 15px;
}

.logo {
    background-color: var(--gold);
    color: var(--black);
    width: 50px;
    height: 50px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    font-weight: bold;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
    transition: transform 0.3s ease;
}

.logo:hover {
    transform: rotate(360deg);
}

.logo-text h1 {
    font-size: 28px;
    margin-bottom: 5px;
}

.logo-text p {
    opacity: 0.9;
    font-size: 14px;
}

.jamaican-flag {
    display: flex;
    margin-top: 5px;
}

.flag-color {
    height: 8px;
    width: 25px;
}

.green-flag { background-color: var(--primary-green); }
.yellow-flag { background-color: var(--yellow); }
.black-flag { background-color: var(--black); }

.header-actions {
    display: flex;
    gap: 15px;
}

.btn {
    padding: 12px 24px;
    border-radius: 6px;
    border: none;
    cursor: pointer;
    font-weight: 600;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.btn-primary {
    background-color: var(--gold);
    color: var(--black);
}

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

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(0, 0, 0, 0.15);
}

.btn:active {
    transform: translateY(-1px);
}

.app-wrapper {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 40px;
}

@media (max-width: 900px) {
    .app-wrapper {
        grid-template-columns: 1fr;
    }
}

.input-section, .preview-section {
    background-color: white;
    border-radius: 10px;
    padding: 25px;
    box-shadow: var(--shadow);
    transition: box-shadow 0.3s ease;
}

.input-section:hover, .preview-section:hover {
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.12);
}

.section-title {
    color: var(--primary-green);
    padding-bottom: 15px;
    margin-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
    font-size: 22px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.section-title i {
    color: var(--gold);
}

.form-group {
    margin-bottom: 20px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark-text);
}

input, select, textarea {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-size: 16px;
    transition: all 0.3s;
}

input:focus, select:focus, textarea:focus {
    outline: none;
    border-color: var(--secondary-green);
    box-shadow: 0 0 0 3px rgba(45, 147, 108, 0.1);
}

.invoice-items {
    margin-top: 25px;
}

.items-header {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr auto;
    gap: 10px;
    padding: 10px 0;
    font-weight: 600;
    border-bottom: 2px solid var(--border-color);
    color: var(--primary-green);
}

.item-row {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr auto;
    gap: 10px;
    padding: 12px 0;
    border-bottom: 1px solid #eee;
    align-items: center;
    animation: slideIn 0.3s ease;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.item-row input {
    padding: 8px 10px;
}

.add-item-btn {
    background-color: #f0f7f4;
    color: var(--primary-green);
    border: 2px dashed var(--primary-green);
    width: 100%;
    padding: 12px;
    margin-top: 15px;
    font-weight: 600;
    cursor: pointer;
    border-radius: 6px;
    transition: all 0.3s;
}

.add-item-btn:hover {
    background-color: #e1f0ea;
    border-style: solid;
}

.remove-item {
    color: #e74c3c;
    cursor: pointer;
    font-size: 18px;
    text-align: center;
    transition: all 0.2s;
}

.remove-item:hover {
    transform: scale(1.2);
    color: #c0392b;
}

.preview-section {
    display: flex;
    flex-direction: column;
}

.invoice-preview {
    flex: 1;
    background-color: white;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 30px;
    margin-bottom: 25px;
    overflow-y: auto;
    max-height: 500px;
}

.invoice-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--primary-green);
}

.invoice-title h2 {
    color: var(--primary-green);
    font-size: 28px;
    margin-bottom: 5px;
}

.invoice-meta {
    text-align: right;
}

.invoice-id {
    font-size: 18px;
    font-weight: bold;
    color: var(--dark-text);
    margin-bottom: 10px;
}

.invoice-date {
    color: #666;
}

.company-info, .client-info {
    margin-bottom: 25px;
}

.info-title {
    font-weight: 600;
    color: var(--primary-green);
    margin-bottom: 8px;
    font-size: 18px;
}

.invoice-details-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

.items-table {
    width: 100%;
    border-collapse: collapse;
    margin: 25px 0;
}

.items-table th {
    background-color: #f0f7f4;
    color: var(--primary-green);
    padding: 12px 15px;
    text-align: left;
    font-weight: 600;
}

.items-table td {
    padding: 12px 15px;
    border-bottom: 1px solid #eee;
}

.text-right {
    text-align: right;
}

.totals-section {
    margin-top: 25px;
    border-top: 2px solid var(--border-color);
    padding-top: 20px;
}

.total-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 10px;
    font-size: 16px;
}

.total-row.grand-total {
    font-size: 20px;
    font-weight: bold;
    color: var(--primary-green);
    margin-top: 10px;
    padding-top: 10px;
    border-top: 1px solid var(--border-color);
}

.invoice-footer {
    margin-top: 40px;
    padding-top: 20px;
    border-top: 1px solid #eee;
    text-align: center;
    color: #666;
    font-size: 14px;
}

.actions-bar {
    display: flex;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 20px;
}

.action-btn {
    flex: 1;
    min-width: 150px;
    padding: 15px;
    text-align: center;
    border-radius: 6px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 10px;
}

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

.action-btn.download {
    background-color: var(--gold);
    color: var(--black);
}

.action-btn.share {
    background-color: #3498db;
    color: white;
}

.action-btn.save {
    background-color: #9b59b6;
    color: white;
}

.action-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.action-btn:active {
    transform: translateY(-1px);
}

footer {
    text-align: center;
    padding: 25px 20px;
    margin-top: 40px;
    color: #666;
    border-top: 1px solid var(--border-color);
    font-size: 15px;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin: 40px 0;
}

.feature-card {
    background-color: white;
    padding: 25px;
    border-radius: 10px;
    box-shadow: var(--shadow);
    text-align: center;
    transition: transform 0.3s, box-shadow 0.3s;
}

.feature-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.15);
}

.feature-icon {
    background-color: #e1f0ea;
    color: var(--primary-green);
    width: 60px;
    height: 60px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 24px;
    transition: all 0.3s;
}

.feature-card:hover .feature-icon {
    background-color: var(--primary-green);
    color: white;
    transform: scale(1.1);
}

.feature-card h3 {
    color: var(--primary-green);
    margin-bottom: 10px;
}

@media print {
    header, .input-section, .actions-bar, footer, .features {
        display: none !important;
    }
    
    .preview-section {
        box-shadow: none;
        padding: 0;
    }
    
    .invoice-preview {
        max-height: none;
        border: none;
        padding: 0;
    }
    
    body {
        background-color: white;
    }
}

.notification {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background-color: var(--primary-green);
    color: white;
    padding: 15px 25px;
    border-radius: 6px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    gap: 10px;
    z-index: 1000;
    opacity: 0;
    transform: translateY(20px);
    transition: all 0.3s;
}

.notification.show {
    opacity: 1;
    transform: translateY(0);
}

@media (max-width: 768px) {
    .header-content {
        flex-direction: column;
        text-align: center;
    }
    
    .logo-text h1 {
        font-size: 24px;
    }
    
    .form-row {
        grid-template-columns: 1fr;
    }
    
    .items-header, .item-row {
        grid-template-columns: 2fr 0.5fr 0.5fr 0.5fr auto;
        font-size: 14px;
    }
    
    .actions-bar {
        flex-direction: column;
    }
    
    .action-btn {
        width: 100%;
    }
}