/* ===== CSS RESET & BASE ===== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Green Color Palette - Primary Theme */
    --primary-50: #e8f5e9;
    --primary-100: #c8e6c9;
    --primary-200: #a5d6a7;
    --primary-300: #81c784;
    --primary-400: #66bb6a;
    --primary-500: #4caf50;    /* Main Primary Green */
    --primary-600: #43a047;
    --primary-700: #388e3c;
    --primary-800: #2e7d32;
    --primary-900: #1b5e20;
    
    /* Secondary Colors */
    --secondary-500: #ff9800;  /* Orange for accents */
    --secondary-600: #f57c00;
    
    /* Neutral Colors */
    --neutral-50: #fafafa;
    --neutral-100: #f5f5f5;
    --neutral-200: #eeeeee;
    --neutral-300: #e0e0e0;
    --neutral-400: #bdbdbd;
    --neutral-500: #9e9e9e;
    --neutral-600: #757575;
    --neutral-700: #616161;
    --neutral-800: #424242;
    --neutral-900: #212121;
    
    /* Status Colors */
    --success: #4caf50;
    --warning: #ff9800;
    --danger: #f44336;
    --info: #2196f3;
    
    /* Functional Colors */
    --background: #f9fdf8;
    --surface: #ffffff;
    --text-primary: #1b5e20;
    --text-secondary: #424242;
    --border: #c8e6c9;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.12);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-xl: 0 20px 25px rgba(0, 0, 0, 0.15);
    
    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 300ms ease;
    --transition-slow: 500ms ease;
}

/* ===== BASE TYPOGRAPHY ===== */
body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--background);
    color: var(--text-secondary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

h1, h2, h3, h4 {
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.3;
}

h1 {
    font-size: 2rem;
    margin-bottom: var(--spacing-xs);
}

h2 {
    font-size: 1.5rem;
    margin-bottom: var(--spacing-sm);
}

h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-sm);
}

p {
    margin-bottom: var(--spacing-md);
}

a {
    color: var(--primary-600);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--primary-800);
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ===== HEADER STYLES ===== */
.main-header {
    background: linear-gradient(135deg, var(--primary-700) 0%, var(--primary-900) 100%);
    color: white;
    padding: var(--spacing-md) 0;
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
}

.logo {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.logo i {
    font-size: 2.5rem;
    color: var(--primary-200);
}

.logo h1 {
    color: white;
    font-size: 1.75rem;
    margin: 0;
}

.tagline {
    color: var(--primary-200);
    font-size: 0.875rem;
    margin: 0;
}

.header-stats {
    display: flex;
    gap: var(--spacing-lg);
}

.stat-badge {
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: var(--radius-lg);
    padding: var(--spacing-sm) var(--spacing-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    min-width: 120px;
    backdrop-filter: blur(10px);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--primary-200);
    margin-bottom: 2px;
}

.stat-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: white;
    font-family: 'Roboto Mono', monospace;
}

.stat-unit {
    font-size: 0.75rem;
    color: var(--primary-200);
}

/* ===== DASHBOARD STATS ===== */
.stats-overview {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-xl) 0;
}

.stat-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    transition: all var(--transition-normal);
}

.stat-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.stat-card i {
    font-size: 2rem;
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
}

.stat-card.primary i {
    background: var(--primary-50);
    color: var(--primary-600);
}

.stat-card.secondary i {
    background: #fff3e0;
    color: var(--secondary-600);
}

.stat-card.accent i {
    background: #e3f2fd;
    color: var(--info);
}

.stat-card.success i {
    background: #e8f5e9;
    color: var(--success);
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--neutral-900);
    font-family: 'Roboto Mono', monospace;
    line-height: 1;
}

.stat-number .unit {
    font-size: 1rem;
    color: var(--neutral-600);
    font-weight: 400;
}

/* ===== TABS NAVIGATION ===== */
.tabs-navigation {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xl);
    border-bottom: 2px solid var(--neutral-200);
    padding-bottom: var(--spacing-sm);
    overflow-x: auto;
}

.tab-btn {
    background: none;
    border: none;
    padding: var(--spacing-md) var(--spacing-lg);
    font-family: 'Poppins', sans-serif;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--neutral-600);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    border-radius: var(--radius-md) var(--radius-md) 0 0;
    transition: all var(--transition-fast);
    white-space: nowrap;
}

.tab-btn:hover {
    background: var(--primary-50);
    color: var(--primary-700);
}

.tab-btn.active {
    background: var(--primary-500);
    color: white;
    box-shadow: var(--shadow-sm);
}

.tab-btn i {
    font-size: 1.1rem;
}

/* ===== TAB CONTENTS ===== */
.tab-content {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tab-content.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

.tab-header {
    margin-bottom: var(--spacing-xl);
}

.tab-header h2 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

/* ===== FORM STYLES ===== */
.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.form-grid.compact {
    gap: var(--spacing-md);
}

.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-weight: 500;
    color: var(--neutral-700);
    margin-bottom: var(--spacing-xs);
    font-size: 0.9rem;
}

.form-control {
    width: 100%;
    padding: var(--spacing-md);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    font-family: 'Poppins', sans-serif;
    font-size: 1rem;
    transition: all var(--transition-fast);
    background: var(--surface);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-500);
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.1);
}

.input-hint {
    font-size: 0.75rem;
    color: var(--neutral-500);
    margin-top: var(--spacing-xs);
}

/* ===== BUTTON STYLES ===== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    font-family: 'Poppins', sans-serif;
    font-size: 0.95rem;
    font-weight: 500;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-align: center;
    white-space: nowrap;
}

.btn-primary {
    background: var(--primary-500);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-600);
    transform: translateY(-1px);
    box-shadow: var(--shadow-md);
}

.btn-outline {
    background: transparent;
    color: var(--primary-500);
    border: 1px solid var(--primary-500);
}

.btn-outline:hover {
    background: var(--primary-50);
}

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

.btn-danger:hover {
    background: #d32f2f;
}

.btn-lg {
    padding: var(--spacing-lg) var(--spacing-xl);
    font-size: 1.1rem;
}

.btn-outline-light {
    background: transparent;
    color: white;
    border: 1px solid rgba(255, 255, 255, 0.3);
}

.btn-outline-light:hover {
    background: rgba(255, 255, 255, 0.1);
}

/* ===== CARD STYLES ===== */
.input-card, .preview-card, .wallet-balance-card, .settings-card, .add-partner-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
    margin-bottom: var(--spacing-xl);
}

.input-card h3, .preview-card h4, .wallet-balance-card h3, .settings-card h3, .add-partner-card h3 {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
}

/* ===== PREVIEW CARD ===== */
.form-preview {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border);
}

.preview-details {
    display: flex;
    gap: var(--spacing-xl);
    align-items: center;
    flex-wrap: wrap;
}

.preview-total {
    background: var(--primary-50);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    font-weight: 600;
    color: var(--primary-800);
}

.token-amount {
    font-family: 'Roboto Mono', monospace;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-600);
}

/* ===== TABLE STYLES ===== */
.table-responsive {
    overflow-x: auto;
    border-radius: var(--radius-md);
    border: 1px solid var(--border);
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 800px;
}

.data-table thead {
    background: var(--primary-50);
    border-bottom: 2px solid var(--primary-200);
}

.data-table th {
    padding: var(--spacing-md);
    text-align: left;
    font-weight: 600;
    color: var(--primary-800);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.data-table td {
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--neutral-200);
}

.data-table tr:hover {
    background: var(--primary-50);
}

.data-table .empty-row, .empty-transactions {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-md);
    color: var(--neutral-500);
}

.data-table .empty-row i, .empty-transactions i {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    color: var(--neutral-300);
}

.table-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

.table-actions {
    display: flex;
    gap: var(--spacing-md);
}

/* ===== WALLET STYLES ===== */
.wallet-dashboard {
    display: grid;
    grid-template-columns: 1fr 2fr;
    gap: var(--spacing-xl);
}

@media (max-width: 768px) {
    .wallet-dashboard {
        grid-template-columns: 1fr;
    }
}

.wallet-balance-card .balance-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
}

.balance-badge {
    background: var(--primary-500);
    color: white;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.balance-amount {
    font-size: 3.5rem;
    font-weight: 700;
    color: var(--neutral-900);
    font-family: 'Roboto Mono', monospace;
    line-height: 1;
    margin-bottom: var(--spacing-sm);
}

.balance-amount .currency {
    font-size: 1.5rem;
    color: var(--neutral-600);
    margin-left: var(--spacing-xs);
}

.balance-equivalent {
    color: var(--neutral-600);
    font-size: 1.1rem;
    margin-bottom: var(--spacing-xl);
}

.balance-actions {
    display: flex;
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

/* ===== TRANSACTIONS LIST ===== */
.transactions-list {
    max-height: 500px;
    overflow-y: auto;
}

.transaction-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md);
    border-bottom: 1px solid var(--neutral-200);
    transition: background var(--transition-fast);
}

.transaction-item:hover {
    background: var(--primary-50);
}

.transaction-info {
    flex: 1;
}

.transaction-type {
    font-weight: 500;
    color: var(--neutral-800);
    margin-bottom: 2px;
}

.transaction-details {
    font-size: 0.875rem;
    color: var(--neutral-600);
}

.transaction-amount {
    font-family: 'Roboto Mono', monospace;
    font-weight: 600;
    font-size: 1.1rem;
}

.transaction-amount.positive {
    color: var(--success);
}

.transaction-amount.negative {
    color: var(--danger);
}

/* ===== OUTPUT RESULTS ===== */
.output-controls {
    display: flex;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.output-results {
    background: var(--surface);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    margin-bottom: var(--spacing-xl);
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--border);
}

.output-placeholder {
    text-align: center;
    padding: var(--spacing-2xl);
    color: var(--neutral-500);
}

.output-placeholder i {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    color: var(--neutral-300);
}

.conversion-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
    margin: var(--spacing-lg) 0;
}

.conversion-item {
    text-align: center;
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    background: var(--neutral-100);
}

.conversion-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-700);
    font-family: 'Roboto Mono', monospace;
    margin: var(--spacing-sm) 0;
}

.conversion-label {
    font-size: 0.9rem;
    color: var(--neutral-600);
}

/* ===== INFO GRID ===== */
.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
}

.info-item {
    padding: var(--spacing-lg);
    border-radius: var(--radius-md);
    background: var(--surface);
    border: 1px solid var(--border);
    transition: transform var(--transition-normal);
}

.info-item:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

.info-icon {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--radius-md);
}

.info-icon.plastic {
    background: #e3f2fd;
}

.info-icon.organic {
    background: #e8f5e9;
}

.info-icon.green {
    background: #f1f8e9;
}

.info-icon.paper {
    background: #fff3e0;
}

/* ===== SETTINGS PANEL ===== */
.settings-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-xl);
}

.setting-item {
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-lg);
    border-bottom: 1px solid var(--border);
}

.setting-item:last-child {
    border-bottom: none;
}

.setting-control {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-sm);
}

.setting-control input[type="range"] {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: var(--neutral-300);
    outline: none;
    -webkit-appearance: none;
}

.setting-control input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--primary-500);
    cursor: pointer;
}

.range-value {
    min-width: 100px;
    font-family: 'Roboto Mono', monospace;
    font-weight: 600;
    color: var(--primary-600);
    font-size: 1.1rem;
}

.setting-unit {
    margin-left: var(--spacing-sm);
    color: var(--neutral-600);
}

.setting-hint {
    font-size: 0.875rem;
    color: var(--neutral-500);
    margin-top: var(--spacing-sm);
}

.setting-actions {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

/* ===== FOOTER ===== */
.main-footer {
    background: linear-gradient(135deg, var(--primary-800) 0%, var(--primary-900) 100%);
    color: white;
    padding: var(--spacing-xl) 0;
    margin-top: auto;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--spacing-xl);
    margin-bottom: var(--spacing-lg);
}

.footer-logo {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.footer-logo i {
    font-size: 2rem;
    color: var(--primary-200);
    margin-bottom: var(--spacing-sm);
}

.footer-logo h3 {
    color: white;
    margin-bottom: var(--spacing-xs);
}

.footer-logo p {
    color: var(--primary-200);
    margin: 0;
    font-size: 0.875rem;
}

.footer-info {
    flex: 1;
    max-width: 400px;
}

.footer-info p {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
    color: var(--primary-200);
    font-size: 0.9rem;
}

.footer-actions {
    display: flex;
    gap: var(--spacing-md);
}

.footer-copyright {
    text-align: center;
    padding-top: var(--spacing-lg);
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--primary-200);
    font-size: 0.875rem;
}

/* ===== TOAST NOTIFICATION ===== */
.toast {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    background: var(--primary-600);
    color: white;
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    display: none;
    align-items: center;
    gap: var(--spacing-md);
    z-index: 1000;
    animation: slideIn 0.3s ease;
    max-width: 350px;
}

@keyframes slideIn {
    from { transform: translateX(100%); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.toast-content {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.toast-icon {
    font-size: 1.5rem;
}

.toast-message {
    font-weight: 500;
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 768px) {
    .container {
        padding: 0 var(--spacing-md);
    }
    
    .header-content {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-md);
    }
    
    .header-stats {
        width: 100%;
        justify-content: space-between;
    }
    
    .stat-badge {
        min-width: 100px;
    }
    
    .tabs-navigation {
        overflow-x: auto;
        padding-bottom: var(--spacing-xs);
    }
    
    .tab-btn {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.85rem;
    }
    
    .form-preview {
        flex-direction: column;
        align-items: stretch;
    }
    
    .preview-details {
        justify-content: space-between;
    }
    
    .footer-content {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-lg);
    }
    
    .footer-actions {
        width: 100%;
        justify-content: flex-start;
    }
    
    .toast {
        left: var(--spacing-md);
        right: var(--spacing-md);
        bottom: var(--spacing-md);
        max-width: none;
    }
}

@media (max-width: 480px) {
    .stats-overview {
        grid-template-columns: 1fr;
    }
    
    .form-grid {
        grid-template-columns: 1fr;
    }
    
    .table-actions {
        flex-direction: column;
        width: 100%;
    }
    
    .table-actions .btn {
        width: 100%;
    }
    
    .balance-actions {
        flex-direction: column;
    }
    
    .setting-actions {
        flex-direction: column;
    }
    
    .setting-actions .btn {
        width: 100%;
    }
}

/* ===== PRINT STYLES ===== */
@media print {
    .tabs-navigation,
    .output-controls,
    .table-actions,
    .balance-actions,
    .setting-actions,
    .footer-actions,
    .btn {
        display: none !important;
    }
    
    .tab-content {
        display: block !important;
        break-inside: avoid;
    }
    
    .container {
        max-width: none;
        padding: 0;
    }
    
    .main-header,
    .main-footer {
        background: white !important;
        color: black !important;
        position: static;
    }
    
    .stat-card,
    .input-card,
    .data-table {
        box-shadow: none !important;
        border: 1px solid #ddd !important;
    }
}