/* BulkMailer Pro - Dark Theme Stylesheet */
:root {
    --bg-dark: #0f0f1a;
    --bg-card: #1a1a2e;
    --bg-input: #12121f;
    --border: #2a2a4a;
    --text: #e0e0e0;
    --text-muted: #888;
    --primary: #667eea;
    --primary-dark: #5a6fd6;
    --accent: #764ba2;
    --success: #28a745;
    --danger: #dc3545;
    --warning: #ffc107;
    --info: #17a2b8;
    --gradient: linear-gradient(135deg, #667eea, #764ba2);
    --radius: 8px;
    --shadow: 0 4px 20px rgba(0,0,0,0.3);
}

* { margin: 0; padding: 0; box-sizing: border-box; }
body { font-family: 'Segoe UI', system-ui, -apple-system, sans-serif; background: var(--bg-dark); color: var(--text); line-height: 1.6; }

/* Scrollbar */
::-webkit-scrollbar { width: 8px; }
::-webkit-scrollbar-track { background: var(--bg-dark); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 4px; }

/* Layout */
.app-container { display: flex; min-height: 100vh; }
.sidebar { width: 260px; background: var(--bg-card); border-right: 1px solid var(--border); padding: 1.5rem 0; position: fixed; top: 0; left: 0; bottom: 0; overflow-y: auto; z-index: 100; }
.main-content { flex: 1; margin-left: 260px; padding: 2rem; min-height: 100vh; }

/* Sidebar */
.sidebar-header { padding: 0 1.5rem 1.5rem; border-bottom: 1px solid var(--border); margin-bottom: 1rem; }
.sidebar-header h2 { font-size: 1.3rem; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.sidebar-header small { color: var(--text-muted); font-size: 0.75rem; }
.nav-menu { list-style: none; }
.nav-menu li a { display: flex; align-items: center; gap: 0.75rem; padding: 0.75rem 1.5rem; color: var(--text-muted); text-decoration: none; transition: all 0.2s; border-left: 3px solid transparent; }
.nav-menu li a:hover, .nav-menu li a.active { color: var(--text); background: rgba(102,126,234,0.1); border-left-color: var(--primary); }
.nav-menu li a .icon { font-size: 1.1rem; width: 24px; text-align: center; }
.nav-section { padding: 0.5rem 1.5rem; font-size: 0.7rem; text-transform: uppercase; letter-spacing: 1px; color: #555; margin-top: 1rem; }

/* Cards */
.card { background: var(--bg-card); border-radius: var(--radius); border: 1px solid var(--border); padding: 1.5rem; margin-bottom: 1.5rem; }
.card-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; padding-bottom: 1rem; border-bottom: 1px solid var(--border); }
.card-header h3 { font-size: 1.1rem; }

/* Stats Grid */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(200px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }
.stat-card { background: var(--bg-card); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.2rem; }
.stat-card .stat-icon { font-size: 2rem; margin-bottom: 0.5rem; }
.stat-card .stat-value { font-size: 1.8rem; font-weight: 700; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.stat-card .stat-label { color: var(--text-muted); font-size: 0.85rem; }

/* Forms */
.form-group { margin-bottom: 1rem; }
.form-group label { display: block; margin-bottom: 0.3rem; font-weight: 500; color: #aaa; font-size: 0.85rem; }
.form-group input, .form-group select, .form-group textarea { width: 100%; padding: 0.6rem 0.8rem; background: var(--bg-input); border: 1px solid var(--border); border-radius: var(--radius); color: var(--text); font-size: 0.9rem; transition: border 0.3s; font-family: inherit; }
.form-group input:focus, .form-group select:focus, .form-group textarea:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 2px rgba(102,126,234,0.2); }
.form-group textarea { min-height: 100px; resize: vertical; }
.form-group small { color: var(--text-muted); font-size: 0.75rem; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.form-row-3 { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 1rem; }

/* Buttons */
.btn { display: inline-flex; align-items: center; gap: 0.4rem; padding: 0.55rem 1.2rem; border: none; border-radius: var(--radius); font-size: 0.85rem; cursor: pointer; font-weight: 500; transition: all 0.2s; text-decoration: none; line-height: 1.5; }
.btn-primary { background: var(--gradient); color: #fff; }
.btn-primary:hover { opacity: 0.9; }
.btn-success { background: var(--success); color: #fff; }
.btn-danger { background: var(--danger); color: #fff; }
.btn-warning { background: var(--warning); color: #333; }
.btn-info { background: var(--info); color: #fff; }
.btn-outline { background: transparent; border: 1px solid var(--border); color: var(--text); }
.btn-outline:hover { border-color: var(--primary); color: var(--primary); }
.btn-sm { padding: 0.3rem 0.7rem; font-size: 0.78rem; }
.btn-block { display: block; width: 100%; text-align: center; justify-content: center; }
.btn-group { display: flex; gap: 0.5rem; flex-wrap: wrap; }

/* Tables */
.table-responsive { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
table th, table td { padding: 0.7rem 0.8rem; text-align: left; border-bottom: 1px solid var(--border); font-size: 0.85rem; }
table th { color: var(--text-muted); font-weight: 600; font-size: 0.78rem; text-transform: uppercase; letter-spacing: 0.5px; }
table tr:hover { background: rgba(102,126,234,0.05); }

/* Badges */
.badge { display: inline-block; padding: 0.2rem 0.5rem; border-radius: 4px; font-size: 0.72rem; font-weight: 600; text-transform: uppercase; }
.badge-success { background: rgba(40,167,69,0.2); color: #5cff8a; }
.badge-danger { background: rgba(220,53,69,0.2); color: #ff6b7a; }
.badge-warning { background: rgba(255,193,7,0.2); color: #ffc107; }
.badge-info { background: rgba(23,162,184,0.2); color: #5dd6e8; }
.badge-secondary { background: rgba(108,117,125,0.2); color: #aaa; }

/* Alerts */
.alert { padding: 0.8rem 1rem; border-radius: var(--radius); margin-bottom: 1rem; font-size: 0.9rem; }
.alert-success { background: rgba(40,167,69,0.15); border: 1px solid rgba(40,167,69,0.3); color: #5cff8a; }
.alert-danger { background: rgba(220,53,69,0.15); border: 1px solid rgba(220,53,69,0.3); color: #ff6b7a; }
.alert-warning { background: rgba(255,193,7,0.15); border: 1px solid rgba(255,193,7,0.3); color: #ffc107; }
.alert-info { background: rgba(23,162,184,0.15); border: 1px solid rgba(23,162,184,0.3); color: #5dd6e8; }

/* Page Header */
.page-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1.5rem; }
.page-header h1 { font-size: 1.5rem; font-weight: 600; }

/* Tabs */
.tabs { display: flex; gap: 0; border-bottom: 1px solid var(--border); margin-bottom: 1.5rem; }
.tab { padding: 0.7rem 1.2rem; color: var(--text-muted); cursor: pointer; border-bottom: 2px solid transparent; font-size: 0.9rem; transition: all 0.2s; background: none; border-top: none; border-left: none; border-right: none; }
.tab:hover { color: var(--text); }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }
.tab-content { display: none; }
.tab-content.active { display: block; }

/* Modal */
.modal-overlay { display: none; position: fixed; top: 0; left: 0; right: 0; bottom: 0; background: rgba(0,0,0,0.7); z-index: 1000; align-items: center; justify-content: center; }
.modal-overlay.active { display: flex; }
.modal { background: var(--bg-card); border-radius: 12px; border: 1px solid var(--border); width: 100%; max-width: 600px; max-height: 80vh; overflow-y: auto; }
.modal-header { display: flex; justify-content: space-between; align-items: center; padding: 1.2rem 1.5rem; border-bottom: 1px solid var(--border); }
.modal-header h3 { font-size: 1.1rem; }
.modal-close { background: none; border: none; color: var(--text-muted); cursor: pointer; font-size: 1.5rem; line-height: 1; }
.modal-body { padding: 1.5rem; }
.modal-footer { padding: 1rem 1.5rem; border-top: 1px solid var(--border); display: flex; justify-content: flex-end; gap: 0.5rem; }

/* Login */
.login-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-container { width: 100%; max-width: 420px; margin: 2rem; }
.login-card { background: var(--bg-card); border-radius: 12px; border: 1px solid var(--border); padding: 2rem; }
.login-header { text-align: center; margin-bottom: 1.5rem; }
.login-header h1 { font-size: 1.8rem; background: var(--gradient); -webkit-background-clip: text; -webkit-text-fill-color: transparent; }
.login-header p { color: var(--text-muted); margin-top: 0.3rem; }

/* Progress Bar */
.progress-bar { width: 100%; height: 8px; background: var(--bg-input); border-radius: 4px; overflow: hidden; }
.progress-bar .fill { height: 100%; background: var(--gradient); border-radius: 4px; transition: width 0.5s; }

/* Spam Score */
.spam-score { display: inline-flex; align-items: center; gap: 0.5rem; padding: 0.5rem 1rem; border-radius: var(--radius); font-weight: 600; }
.spam-excellent { background: rgba(40,167,69,0.2); color: #5cff8a; }
.spam-good { background: rgba(23,162,184,0.2); color: #5dd6e8; }
.spam-moderate { background: rgba(255,193,7,0.2); color: #ffc107; }
.spam-poor { background: rgba(220,53,69,0.2); color: #ff6b7a; }
.spam-critical { background: rgba(220,53,69,0.3); color: #ff4757; }

/* Editor Toolbar */
.editor-toolbar { display: flex; gap: 0.3rem; padding: 0.5rem; background: var(--bg-input); border: 1px solid var(--border); border-bottom: none; border-radius: var(--radius) var(--radius) 0 0; flex-wrap: wrap; }
.editor-toolbar button { background: none; border: 1px solid transparent; color: var(--text-muted); padding: 0.3rem 0.5rem; cursor: pointer; border-radius: 4px; font-size: 0.85rem; }
.editor-toolbar button:hover { background: var(--border); color: var(--text); }
.editor-content { min-height: 300px; padding: 1rem; background: var(--bg-input); border: 1px solid var(--border); border-radius: 0 0 var(--radius) var(--radius); color: var(--text); outline: none; overflow-y: auto; }
.editor-content:focus { border-color: var(--primary); }

/* Responsive */
@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); transition: transform 0.3s; position: fixed; }
    .sidebar.open { transform: translateX(0); }
    .main-content { margin-left: 0; }
    .form-row, .form-row-3 { grid-template-columns: 1fr; }
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .page-header { flex-direction: column; gap: 1rem; align-items: flex-start; }
}

/* Utility */
.text-center { text-align: center; }
.text-muted { color: var(--text-muted); }
.text-success { color: #5cff8a; }
.text-danger { color: #ff6b7a; }
.text-warning { color: #ffc107; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mb-1 { margin-bottom: 0.5rem; }
.mb-2 { margin-bottom: 1rem; }
.gap-1 { gap: 0.5rem; }
.d-flex { display: flex; }
.align-center { align-items: center; }
.justify-between { justify-content: space-between; }
.hidden { display: none; }

/* Toast Notifications */
.toast-container { position: fixed; top: 1rem; right: 1rem; z-index: 9999; }
.toast { padding: 0.8rem 1.2rem; border-radius: var(--radius); margin-bottom: 0.5rem; animation: slideIn 0.3s ease; font-size: 0.85rem; display: flex; align-items: center; gap: 0.5rem; max-width: 350px; }
@keyframes slideIn { from { transform: translateX(100%); opacity: 0; } to { transform: translateX(0); opacity: 1; } }

/* Loading Spinner */
.spinner { display: inline-block; width: 20px; height: 20px; border: 2px solid var(--border); border-top-color: var(--primary); border-radius: 50%; animation: spin 0.8s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

/* SMTP Health Indicator */
.health-dot { display: inline-block; width: 10px; height: 10px; border-radius: 50%; margin-right: 0.5rem; }
.health-dot.healthy { background: var(--success); box-shadow: 0 0 6px rgba(40,167,69,0.5); }
.health-dot.unhealthy { background: var(--danger); box-shadow: 0 0 6px rgba(220,53,69,0.5); }
.health-dot.disabled { background: #555; }

/* ===== Modern Slate SaaS UI v2 ===== */
:root{
  --bg:#f5f7fb; --bg-card:#fff; --bg-input:#f8fafc; --text:#172033; --text-muted:#667085;
  --border:#e6eaf0; --primary:#4f46e5; --primary-2:#7c3aed; --gradient:linear-gradient(135deg,#4f46e5,#7c3aed);
  --success:#16a34a; --danger:#dc2626; --warning:#d97706; --info:#0284c7; --radius:12px;
  --sidebar:260px; --shadow:0 8px 30px rgba(15,23,42,.06);
}
*{box-sizing:border-box}
body{background:var(--bg);color:var(--text);font-family:Inter,ui-sans-serif,system-ui,-apple-system,BlinkMacSystemFont,"Segoe UI",sans-serif}
.app-container{min-height:100vh}
.sidebar{background:#fff;border-right:1px solid var(--border);box-shadow:4px 0 20px rgba(15,23,42,.03);width:var(--sidebar);padding:0;}
.sidebar-header{height:82px;padding:20px 22px;border-bottom:1px solid var(--border);background:#fff}
.sidebar-header h2{font-size:1.05rem;color:#111827;margin:0;font-weight:800;letter-spacing:-.3px}
.sidebar-header small{display:block;color:#98a2b3;font-size:.72rem;margin-top:4px}
.nav-menu{padding:12px 10px}
.nav-menu li a{display:flex;align-items:center;gap:11px;padding:10px 12px;border-radius:9px;color:#667085;font-size:.84rem;font-weight:600;transition:.18s;margin:2px 0}
.nav-menu li a:hover{background:#f3f4f6;color:#344054}
.nav-menu li a.active{background:#eef2ff;color:#4338ca;box-shadow:inset 3px 0 0 #4f46e5}
.nav-menu .icon{width:22px;text-align:center;font-size:1rem;filter:saturate(.8)}
.nav-section{padding:18px 12px 7px;color:#98a2b3;font-size:.64rem;text-transform:uppercase;letter-spacing:1.1px;font-weight:800}
.main-content{margin-left:var(--sidebar);padding:0 32px 40px;min-height:100vh}
.main-content:before{content:"";display:block;height:1px}
.page-header{position:relative;padding:28px 0 22px;margin-bottom:0;align-items:center}
.page-header h1{font-size:1.65rem;color:#101828;font-weight:800;letter-spacing:-.5px}
.page-header h1:first-letter{color:#4f46e5}
.card,.stat-card{background:#fff;border:1px solid var(--border);box-shadow:var(--shadow);border-radius:14px}
.card{padding:20px;margin-bottom:18px}
.card-header{border-bottom:1px solid #eef0f4;padding-bottom:14px;margin-bottom:16px}
.card-header h3{font-size:.98rem;color:#1d2939;font-weight:750}
.stats-grid{grid-template-columns:repeat(4,minmax(0,1fr));gap:14px;margin-bottom:18px}
.stat-card{padding:18px;position:relative;overflow:hidden}
.stat-card:after{content:"";position:absolute;right:-22px;top:-22px;width:80px;height:80px;border-radius:50%;background:#eef2ff}
.stat-card .stat-icon{position:relative;z-index:1;font-size:1.15rem;width:36px;height:36px;display:flex;align-items:center;justify-content:center;border-radius:10px;background:#eef2ff;margin-bottom:13px}
.stat-card .stat-value{font-size:1.65rem;color:#101828;background:none;-webkit-text-fill-color:initial;font-weight:800;position:relative;z-index:1}
.stat-card .stat-label{font-size:.78rem;color:#667085;margin-top:3px;position:relative;z-index:1}
.btn{border-radius:9px;font-weight:650;box-shadow:none}
.btn-primary{background:var(--gradient)}
.btn-outline{background:#fff;border-color:#d0d5dd;color:#344054}
.btn-outline:hover{background:#f9fafb;border-color:#98a2b3;color:#1d2939}
.form-group label{color:#344054}
.form-group input,.form-group select,.form-group textarea{background:#fff;border-color:#d0d5dd;color:#101828;border-radius:9px}
.form-group input:focus,.form-group select:focus,.form-group textarea:focus{border-color:#6366f1;box-shadow:0 0 0 3px rgba(99,102,241,.12)}
table th,table td{border-bottom-color:#eef0f4;color:#344054}
table th{color:#667085;background:#fafbfc}
table tr:hover{background:#f8faff}
.badge-success{background:#ecfdf3;color:#15803d}.badge-danger{background:#fef2f2;color:#b91c1c}.badge-warning{background:#fffbeb;color:#b45309}.badge-info{background:#eff8ff;color:#0369a1}.badge-secondary{background:#f2f4f7;color:#667085}
.alert-success{background:#ecfdf3;border-color:#bbf7d0;color:#166534}.alert-danger{background:#fef2f2;border-color:#fecaca;color:#991b1b}.alert-warning{background:#fffbeb;border-color:#fde68a;color:#92400e}.alert-info{background:#eff8ff;border-color:#bae6fd;color:#075985}
.progress-bar{background:#eef2f6}.progress-bar .fill{background:var(--gradient)}
.modal-overlay{background:rgba(15,23,42,.45);backdrop-filter:blur(3px)}.modal{background:#fff;border-color:var(--border);box-shadow:0 24px 70px rgba(15,23,42,.18)}
.editor-toolbar{background:#f8fafc;border-color:#d0d5dd}.editor-content{background:#fff;border-color:#d0d5dd;color:#101828}
.text-muted{color:#667085}.text-success{color:#15803d}.text-danger{color:#b91c1c}.text-warning{color:#b45309}
.login-body{background:linear-gradient(135deg,#f5f7fb,#eef2ff)}.login-card{background:#fff;border-color:var(--border);box-shadow:var(--shadow)}
.toast{background:#111827;color:#fff;box-shadow:0 12px 30px rgba(0,0,0,.15)}
/* dashboard sections get more breathing room */
.main-content > .card:first-of-type{margin-top:4px}
@media(max-width:1100px){.stats-grid{grid-template-columns:repeat(2,minmax(0,1fr))}}
@media(max-width:768px){.main-content{padding:0 16px 30px}.sidebar{width:270px}.stats-grid{grid-template-columns:repeat(2,minmax(0,1fr))}.page-header{padding-top:20px}.nav-menu{padding-bottom:30px}}
@media(max-width:480px){.stats-grid{grid-template-columns:1fr}.main-content{padding:0 12px 24px}.page-header h1{font-size:1.35rem}}
.mobile-topbar{display:none}
@media(max-width:768px){.mobile-topbar{display:flex;align-items:center;gap:10px;padding:12px 0 4px;position:sticky;top:0;background:rgba(245,247,251,.94);backdrop-filter:blur(10px);z-index:20}.mobile-menu-btn{border:1px solid var(--border);background:#fff;border-radius:9px;width:38px;height:38px;font-size:18px;color:#344054}.mobile-brand{font-weight:800;flex:1;color:#101828}}

/* Delivery readiness additions: retain the existing application theme. */
.delivery-readiness .form-group label { font-size:14px; color:var(--text); }
.delivery-readiness .form-group small { font-size:14px; color:var(--text-muted); display:block; margin-top:8px; }
.delivery-readiness .text-muted { color:var(--text-muted); font-size:14px; margin-top:16px; }
.delivery-readiness input { min-height:44px; }
.delivery-readiness .delivery-toggle { display:flex; align-items:center; gap:12px; min-height:44px; }
.delivery-readiness .delivery-toggle input { width:20px; min-height:20px; flex:0 0 20px; }
.delivery-readiness input:focus-visible { outline:2px solid #a6b5ff; outline-offset:3px; }
@media (max-width:600px) { .delivery-readiness .form-row-3 { grid-template-columns:1fr; } }