:root{--primary: #2563eb;--primary-hover: #1d4ed8;--bg-color: #ffffff;--text-color: #1e293b;--text-muted: #64748b;--border-color: #e2e8f0;--card-bg: #ffffff;--status-success: #10b981;--status-error: #ef4444;--status-info: #3b82f6;--font-sans: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif}*{box-sizing:border-box}body{margin:0;font-family:var(--font-sans);background-color:var(--bg-color);color:var(--text-color);-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;line-height:1.5;background-image:linear-gradient(to right,rgba(37,99,235,.05) 1px,transparent 1px),linear-gradient(to bottom,rgba(37,99,235,.05) 1px,transparent 1px);background-size:40px 40px}h1,h2,h3,h4,h5,h6{font-weight:600;margin:0}a{color:var(--primary);text-decoration:none}button{cursor:pointer;font-family:inherit}.shell{max-width:1100px;margin:0 auto;padding:2rem 1rem}.card{background:var(--card-bg);border:1px solid var(--border-color);border-radius:12px;box-shadow:0 1px 3px #0000001a,0 1px 2px #0000000f;padding:1.5rem}.app{min-height:100vh}.auth-container{display:flex;align-items:center;justify-content:center;min-height:90vh}.auth-card{width:100%;max-width:400px;text-align:center}.auth-logo img{height:60px;margin-bottom:1.5rem}.auth-title{font-size:1.75rem;font-weight:700;margin-bottom:.75rem;color:var(--text-color)}.auth-description{color:var(--text-muted);font-size:.9375rem;line-height:1.6;margin-bottom:2rem;padding:0 1rem}.auth-description strong{color:var(--primary)}.auth-mode-indicator{font-size:1rem;font-weight:600;color:var(--text-color);margin-bottom:1rem;padding-bottom:.5rem;border-bottom:2px solid var(--primary-light);display:inline-block}.auth-footer{margin-top:1.5rem;border-top:1px solid var(--border-color);padding-top:1rem}.login-notice{background-color:#eff6ff;border:1px solid #bfdbfe;color:#1e40af;padding:1rem;border-radius:8px;font-size:.875rem;line-height:1.5;margin-bottom:1.5rem;text-align:left}.account-notice{background-color:#fef2f2;border:1px solid #fecaca;color:#991b1b;padding:1rem;border-radius:8px;font-size:.875rem;line-height:1.5;margin-bottom:1.5rem;text-align:left}.login-notice strong,.account-notice strong{display:block;margin-bottom:.25rem}.top-nav{display:flex;justify-content:space-between;align-items:center;margin-bottom:2rem;padding-bottom:1rem;border-bottom:1px solid var(--border-color)}.logo-group{display:flex;align-items:center;gap:1rem}.logo-group img{height:40px}.logo-group h1{font-size:1.25rem}.user-nav{display:flex;align-items:center;gap:1rem;font-size:.875rem}.content-grid{display:grid;grid-template-columns:1fr 1fr;gap:2rem}@media(max-width:800px){.content-grid{grid-template-columns:1fr}}.stack{display:flex;flex-direction:column;gap:2rem}.card__header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem}.card__header h2{font-size:1.125rem;color:var(--text-color)}.pill{font-size:.75rem;font-weight:500;padding:.25rem .625rem;border-radius:9999px;background:var(--border-color);color:var(--text-muted)}.form{display:flex;flex-direction:column;gap:1.25rem}.field{display:flex;flex-direction:column;gap:.5rem;text-align:left}.field span{font-size:.875rem;font-weight:500;color:var(--text-color)}.field input,.field textarea{padding:.625rem .875rem;border:1px solid var(--border-color);border-radius:6px;font-size:.875rem;transition:border-color .15s ease;font-family:inherit}.field input:focus,.field textarea:focus{outline:none;border-color:var(--primary);box-shadow:0 0 0 3px #2563eb1a}.field textarea{resize:vertical;min-height:80px;line-height:1.5}button{padding:.625rem 1rem;border-radius:6px;font-weight:500;font-size:.875rem;transition:all .15s ease;border:1px solid transparent}button:disabled{opacity:.5;cursor:not-allowed}.primary-button,button[type=submit]{background:var(--primary);color:#fff}.primary-button:hover,button[type=submit]:hover:not(:disabled){background:var(--primary-hover)}.ghost-button{background:transparent;border-color:var(--border-color);color:var(--text-color)}.ghost-button:hover{background:var(--border-color)}.link-button{background:none;border:none;color:var(--primary);padding:0;font-size:inherit}.link-button:hover{text-decoration:underline}.quota-card{background:linear-gradient(135deg,var(--primary),var(--primary-hover));color:#fff;border:none}.quota-card .card__header h2,.quota-card .quota-label,.quota-card .quota-breakdown span,.quota-card .quota-meta span{color:#fffc}.quota-card .pill{background:#fff3;color:#fff}.quota-value{font-size:3rem;font-weight:700;line-height:1;margin:.5rem 0}.quota-label{font-size:.875rem;margin-bottom:2rem}.quota-breakdown,.quota-meta{display:flex;justify-content:space-between;padding-top:1rem;border-top:1px solid rgba(255,255,255,.2)}.quota-breakdown>div,.quota-meta>div{display:flex;flex-direction:column}.quota-breakdown strong,.quota-meta strong{font-size:1.125rem}.status{padding:.75rem 1rem;border-radius:8px;margin-bottom:1.5rem;font-size:.875rem}.status--success{background:#ecfdf5;color:#065f46;border:1px solid #d1fae5}.status--error{background:#fef2f2;color:#991b1b;border:1px solid #fee2e2}.history-list{display:flex;flex-direction:column;gap:0;max-height:380px;overflow-y:auto;padding-right:8px}.history-list::-webkit-scrollbar{width:6px}.history-list::-webkit-scrollbar-track{background:transparent}.history-list::-webkit-scrollbar-thumb{background:#e2e8f0;border-radius:10px}.history-list::-webkit-scrollbar-thumb:hover{background:#cbd5e1}.history-item{display:flex;justify-content:space-between;align-items:center;padding:.75rem 0;border-bottom:1px solid var(--border-color)}.history-item:last-child{border-bottom:none}.history-name{font-weight:500;margin:0}.history-email{font-size:.75rem;color:var(--text-muted);margin:0}.history-meta{text-align:right;font-size:.75rem;color:var(--text-muted)}.status-chip{display:block;font-size:.7rem;text-transform:uppercase;font-weight:600;margin-bottom:.25rem}.status-chip--sent{color:var(--status-success)}.status-chip--failed{color:var(--status-error)}.admin-card{margin-top:2rem}.admin-grid{display:grid;grid-template-columns:350px 1fr;gap:2rem}@media(max-width:800px){.admin-grid{grid-template-columns:1fr}}.admin-panel{display:flex;flex-direction:column;gap:1.5rem}.admin-panel h3{font-size:1rem;margin:0 0 .5rem;padding-bottom:.5rem;border-bottom:1px solid var(--border-color)}.form-actions{margin-top:.5rem}.admin-card{margin-bottom:2rem}.admin-table{display:flex;flex-direction:column}.admin-row{display:flex;justify-content:space-between;align-items:center;padding:1rem 0;border-bottom:1px solid var(--border-color)}.admin-info{display:flex;flex-direction:column;width:200px}.admin-info strong{font-size:.875rem}.admin-info span{font-size:.75rem;color:var(--text-muted)}.admin-metrics{display:flex;gap:1rem;font-size:.75rem;color:var(--text-muted)}.admin-actions{display:flex;gap:.5rem}.admin-actions input{width:80px;padding:.4rem;border:1px solid var(--border-color);border-radius:4px}.admin-actions button{padding:.4rem .75rem}.content-grid.two-cols{display:grid;grid-template-columns:1fr 1fr;gap:2rem;margin-bottom:2rem}@media(max-width:800px){.content-grid.two-cols{grid-template-columns:1fr}}.full-width{width:100%}.guide-card{background-color:#f8fafc;border-left:4px solid var(--primary);margin-bottom:2rem;padding:2rem}.guide-title{font-size:2rem;margin-bottom:2rem;text-align:center}.horizontal-guide{display:flex;align-items:center;justify-content:center;gap:3rem;padding:1rem 0}.guide-step{display:flex;gap:1rem;align-items:center;flex:0 1 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3rem;font-size:1rem;min-width:200px}@media(max-width:600px){.form-row{flex-direction:column;gap:1.25rem}}.modal-overlay{position:fixed;inset:0;background-color:#0009;display:flex;align-items:center;justify-content:center;z-index:1000;padding:1rem;-webkit-backdrop-filter:blur(4px);backdrop-filter:blur(4px)}.modal-content{background:#fff;border-radius:16px;width:100%;max-width:680px;max-height:90vh;display:flex;flex-direction:column;box-shadow:0 25px 50px -12px #00000040}.modal-header{padding:1.25rem 1.5rem;border-bottom:1px solid var(--border-color);display:flex;justify-content:space-between;align-items:center}.modal-header h2{font-size:1.125rem;margin:0;font-weight:600}.modal-body{padding:1.5rem;overflow-y:auto;background-color:#f1f5f9}.modal-footer{padding:1rem 1.5rem;border-top:1px solid var(--border-color);display:flex;justify-content:flex-end}.close-button{background:none;border:none;font-size:1.5rem;cursor:pointer;color:var(--text-muted);display:flex;align-items:center;justify-content:center;width:32px;height:32px;border-radius:50%;transition:all .2s ease}.close-button:hover{background-color:#f1f5f9;color:var(--text-color)}.email-preview-wrapper{background:#fff;border-radius:8px;overflow:hidden;box-shadow:0 4px 6px -1px #0000001a;transform:scale(.95);transform-origin:top center}@media(min-width:640px){.email-preview-wrapper{transform:scale(1)}}