:root{--color-bg: #F8FAFC;--color-surface: #FFFFFF;--color-surface-elevated: #FFFFFF;--color-border: #E2E8F0;--color-border-hover: #CBD5E1;--color-primary: #0F766E;--color-primary-hover: #0D9488;--color-primary-light: #CCFBF1;--color-primary-subtle: #F0FDFA;--color-secondary: #64748B;--color-secondary-hover: #475569;--color-accent: #F59E0B;--color-accent-hover: #D97706;--color-text-primary: #0F172A;--color-text-secondary: #64748B;--color-text-muted: #94A3B8;--color-text-inverse: #FFFFFF;--color-success: #10B981;--color-warning: #F59E0B;--color-error: #EF4444;--color-info: #3B82F6;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;--font-mono: "JetBrains Mono", "Fira Code", monospace;--space-xs: 4px;--space-sm: 8px;--space-md: 16px;--space-lg: 24px;--space-xl: 32px;--space-2xl: 48px;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-full: 9999px;--shadow-sm: 0 1px 2px 0 rgb(0 0 0 / .05);--shadow-md: 0 4px 6px -1px rgb(0 0 0 / .1), 0 2px 4px -2px rgb(0 0 0 / .1);--shadow-lg: 0 10px 15px -3px rgb(0 0 0 / .1), 0 4px 6px -4px rgb(0 0 0 / .1);--transition-fast: .15s ease;--transition-normal: .2s ease}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}body{font-family:var(--font-sans);background:var(--color-bg);color:var(--color-text-primary);line-height:1.5;-webkit-font-smoothing:antialiased}.container{max-width:1200px;margin:0 auto;padding:var(--space-lg)}.app-layout{display:grid;grid-template-columns:280px 1fr;min-height:100vh}.sidebar{background:var(--color-surface);border-right:1px solid var(--color-border);padding:var(--space-lg);display:flex;flex-direction:column;gap:var(--space-lg)}.logo{display:flex;align-items:center;gap:var(--space-sm);font-weight:700;font-size:1.25rem;color:var(--color-primary)}.logo-icon{width:48px;height:32px;padding:0 6px;background:var(--color-primary);border-radius:var(--radius-md);display:flex;align-items:center;justify-content:center;color:#fff;font-weight:700;font-size:12px}.nav-section{display:flex;flex-direction:column;gap:var(--space-xs)}.nav-label{font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-muted);margin-bottom:var(--space-xs)}.nav-item{display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-md);border-radius:var(--radius-md);color:var(--color-text-secondary);text-decoration:none;font-weight:500;transition:all var(--transition-fast);cursor:pointer;border:none;background:transparent;width:100%;text-align:left;font-size:.875rem;font-family:var(--font-sans)}.nav-item:hover{background:var(--color-bg);color:var(--color-text-primary)}.nav-item.active{background:var(--color-primary-subtle);color:var(--color-primary)}.nav-icon{width:20px;height:20px;opacity:.7}.main-content{padding:var(--space-xl);overflow-y:auto}.page-header{margin-bottom:var(--space-xl)}.page-title{font-size:1.875rem;font-weight:700;color:var(--color-text-primary);margin-bottom:var(--space-xs)}.page-subtitle{color:var(--color-text-secondary);font-size:1rem}.invoice-form{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-xl)}.form-section{background:var(--color-surface);border-radius:var(--radius-lg);padding:var(--space-lg);box-shadow:var(--shadow-sm);border:1px solid var(--color-border)}.form-section.full-width{grid-column:1 / -1}.section-title{font-size:.875rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-secondary);margin-bottom:var(--space-lg);padding-bottom:var(--space-sm);border-bottom:1px solid var(--color-border)}.form-grid{display:grid;grid-template-columns:1fr 1fr;gap:var(--space-md)}.form-grid.three-col{grid-template-columns:1fr 1fr 1fr}.form-grid.three-col .form-group:first-child{white-space:nowrap}.form-grid.three-col .form-group:first-child .form-input{min-width:120px}.form-group{display:flex;flex-direction:column;gap:var(--space-xs)}.form-group.full-width{grid-column:1 / -1}.form-label{font-size:.875rem;font-weight:500;color:var(--color-text-primary)}.form-label.required:after{content:" *";color:var(--color-error)}.form-input{padding:var(--space-sm) var(--space-md);border:1px solid var(--color-border);border-radius:var(--radius-md);font-size:.875rem;font-family:var(--font-sans);transition:all var(--transition-fast);background:var(--color-surface);width:100%}.form-input:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px var(--color-primary-light)}.form-input::placeholder{color:var(--color-text-muted)}.form-input:hover:not(:focus){border-color:var(--color-border-hover)}textarea.form-input{resize:vertical;min-height:80px}.form-select{padding:var(--space-sm) var(--space-md);border:1px solid var(--color-border);border-radius:var(--radius-md);font-size:.875rem;font-family:var(--font-sans);background:var(--color-surface);cursor:pointer;transition:all var(--transition-fast);width:100%}.form-select:focus{outline:none;border-color:var(--color-primary);box-shadow:0 0 0 3px var(--color-primary-light)}.line-items-table{width:100%;border-collapse:collapse}.line-items-table th{text-align:left;padding:var(--space-sm) var(--space-md);font-size:.75rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;color:var(--color-text-muted);background:var(--color-bg);border-bottom:1px solid var(--color-border)}.line-items-table td{padding:var(--space-sm);border-bottom:1px solid var(--color-border);vertical-align:top}.line-items-table .col-description{width:40%}.line-items-table .col-qty{width:10%}.line-items-table .col-rate,.line-items-table .col-amount{width:20%}.line-items-table .col-actions{width:10%;text-align:center}.table-input{width:100%;padding:var(--space-sm);border:1px solid transparent;border-radius:var(--radius-sm);font-size:.875rem;background:transparent;transition:all var(--transition-fast)}.table-input:hover{background:var(--color-bg);border-color:var(--color-border)}.table-input:focus{outline:none;background:var(--color-surface);border-color:var(--color-primary)}.table-input.amount{font-family:var(--font-mono);text-align:right}.btn-icon{width:32px;height:32px;border:none;background:transparent;border-radius:var(--radius-md);cursor:pointer;display:inline-flex;align-items:center;justify-content:center;color:var(--color-text-muted);transition:all var(--transition-fast)}.btn-icon:hover{background:var(--color-bg);color:var(--color-error)}.add-item-btn{margin-top:var(--space-md);display:flex;align-items:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-md);background:transparent;border:1px dashed var(--color-border);border-radius:var(--radius-md);color:var(--color-text-secondary);font-size:.875rem;font-weight:500;cursor:pointer;transition:all var(--transition-fast);width:100%;justify-content:center;font-family:var(--font-sans)}.add-item-btn:hover{border-color:var(--color-primary);color:var(--color-primary);background:var(--color-primary-subtle)}.totals-section{display:flex;justify-content:flex-end;margin-top:var(--space-lg);padding-top:var(--space-lg);border-top:1px solid var(--color-border)}.totals-table{width:280px}.totals-row{display:flex;justify-content:space-between;padding:var(--space-sm) 0;font-size:.875rem}.totals-row.total{font-size:1.125rem;font-weight:700;color:var(--color-primary);border-top:2px solid var(--color-border);padding-top:var(--space-md);margin-top:var(--space-sm)}.totals-row .value{font-family:var(--font-mono)}.btn{display:inline-flex;align-items:center;justify-content:center;gap:var(--space-sm);padding:var(--space-sm) var(--space-lg);border-radius:var(--radius-md);font-size:.875rem;font-weight:500;font-family:var(--font-sans);cursor:pointer;transition:all var(--transition-fast);border:none;text-decoration:none}.btn-primary{background:var(--color-primary);color:var(--color-text-inverse)}.btn-primary:hover{background:var(--color-primary-hover);box-shadow:var(--shadow-md)}.btn-secondary{background:var(--color-secondary);color:var(--color-text-inverse)}.btn-secondary:hover{background:var(--color-secondary-hover)}.btn-outline{background:transparent;border:1px solid var(--color-border);color:var(--color-text-primary)}.btn-outline:hover{background:var(--color-bg);border-color:var(--color-border-hover)}.btn-ghost{background:transparent;color:var(--color-text-secondary)}.btn-ghost:hover{background:var(--color-bg);color:var(--color-text-primary)}.btn-sm{padding:var(--space-xs) var(--space-sm);font-size:.75rem}.btn-lg{padding:var(--space-md) var(--space-xl);font-size:1rem}.action-bar{display:flex;justify-content:space-between;align-items:center;margin-top:var(--space-xl);padding-top:var(--space-lg);border-top:1px solid var(--color-border)}.action-bar .left,.action-bar .right{display:flex;gap:var(--space-md)}@media(max-width:1024px){.app-layout{grid-template-columns:1fr}.sidebar{display:none}.invoice-form{grid-template-columns:1fr}}@media(max-width:768px){.form-grid,.form-grid.three-col{grid-template-columns:1fr}.action-bar{flex-direction:column;gap:var(--space-md)}.action-bar .left,.action-bar .right{width:100%;justify-content:center}.line-items-table{display:block}.line-items-table thead{display:none}.line-items-table tbody,.line-items-table tr,.line-items-table td{display:block;width:100%}.line-items-table td{padding:var(--space-sm) var(--space-md);border:none}.line-items-table td:before{content:attr(data-label);font-size:.75rem;font-weight:600;color:var(--color-text-muted);display:block;margin-bottom:var(--space-xs)}.line-items-table .col-description,.line-items-table .col-qty,.line-items-table .col-rate,.line-items-table .col-amount,.line-items-table .col-actions{width:100%}}.hidden{display:none!important}.toast{position:fixed;bottom:20px;right:20px;background:var(--color-success, #22c55e);color:#fff;padding:12px 20px;border-radius:8px;font-size:14px;font-weight:500;box-shadow:0 4px 12px #00000026;transform:translateY(100px);opacity:0;transition:transform .3s ease,opacity .3s ease;z-index:9999}.toast.show{transform:translateY(0);opacity:1}.modal-overlay{position:fixed;inset:0;background:#0009;display:flex;align-items:center;justify-content:center;z-index:10000;padding:20px}.modal-content{background:#fff;border-radius:12px;padding:32px;max-width:800px;width:100%;max-height:90vh;overflow-y:auto;position:relative}.modal-close{position:absolute;top:16px;right:16px;background:none;border:none;font-size:24px;cursor:pointer;color:var(--color-text-muted);width:32px;height:32px;display:flex;align-items:center;justify-content:center;border-radius:50%}.modal-close:hover{background:var(--color-background)}.modal-content h2{text-align:center;margin-bottom:8px;color:var(--color-text-primary)}.modal-content>p{text-align:center;color:var(--color-text-secondary);margin-bottom:32px}.pricing-grid{display:grid;grid-template-columns:repeat(auto-fit,minmax(200px,1fr));gap:20px}.pricing-card{border:1px solid var(--color-border);border-radius:12px;padding:24px;text-align:center;position:relative;background:#fff;transition:transform .2s ease,box-shadow .2s ease}.pricing-card:hover{transform:translateY(-4px);box-shadow:0 8px 24px #0000001a}.pricing-card.highlighted{border-color:var(--color-primary);box-shadow:0 0 0 2px var(--color-primary-light)}.pricing-card.current{background:var(--color-primary-subtle);border-color:var(--color-primary)}.popular-badge{position:absolute;top:-12px;left:50%;transform:translate(-50%);background:var(--color-primary);color:#fff;padding:4px 16px;border-radius:20px;font-size:12px;font-weight:600}.pricing-title{font-size:1.25rem;font-weight:600;margin-bottom:12px}.pricing-price{margin-bottom:8px}.price-amount{font-size:2.5rem;font-weight:700;color:var(--color-text-primary)}.price-period{font-size:14px;color:var(--color-text-muted)}.pricing-description{font-size:14px;color:var(--color-text-secondary);margin-bottom:20px}.pricing-features{list-style:none;padding:0;margin:0 0 24px;text-align:left}.pricing-features li{padding:8px 0;font-size:14px;color:var(--color-text-secondary)}.pricing-features li:before{content:"✓ ";color:var(--color-success);font-weight:600}.upgrade-btn{width:100%}.upgrade-btn:disabled{opacity:.6;cursor:not-allowed}