/* ==========================================================================
   E-MAIL MARKETING SYSTEM - STYLESHEET EXPANDIDO (VANILLA CSS3)
   ========================================================================== */

:root {
    --bg-main: #0b0f19;
    --bg-surface: #111827;
    --bg-card: #1f2937;
    --bg-card-hover: #374151;
    --border-color: #374151;
    --border-focus: #3b82f6;
    
    --text-primary: #f9fafb;
    --text-secondary: #9ca3af;
    --text-muted: #6b7280;

    --accent-blue: #3b82f6;
    --accent-blue-hover: #2563eb;
    --accent-purple: #8b5cf6;
    --accent-green: #10b981;
    --accent-yellow: #f59e0b;
    --accent-red: #ef4444;

    --badge-pending-bg: rgba(245, 158, 11, 0.15);
    --badge-pending-color: #fbbf24;
    --badge-sent-bg: rgba(16, 185, 129, 0.15);
    --badge-sent-color: #34d399;
    --badge-error-bg: rgba(239, 68, 68, 0.15);
    --badge-error-color: #f87171;
    --badge-open-bg: rgba(139, 92, 246, 0.15);
    --badge-open-color: #a78bfa;

    --font-family: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 16px;
    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --shadow-subtle: 0 4px 20px -2px rgba(0, 0, 0, 0.5);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--font-family);
    line-height: 1.5;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-header {
    background: var(--bg-surface);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.brand { display: flex; align-items: center; gap: 0.75rem; }

.brand-icon {
    width: 38px;
    height: 38px;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: bold;
    font-size: 1.2rem;
    box-shadow: 0 0 15px rgba(59, 130, 246, 0.4);
}

.brand-text h1 { font-size: 1.15rem; font-weight: 700; color: var(--text-primary); }
.brand-text p { font-size: 0.75rem; color: var(--text-muted); }

.nav-tabs {
    display: flex;
    gap: 0.5rem;
    background: var(--bg-main);
    padding: 4px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-color);
}

.tab-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 0.6rem 1.2rem;
    font-size: 0.875rem;
    font-weight: 500;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tab-btn:hover { color: var(--text-primary); }
.tab-btn.active {
    background: var(--accent-blue);
    color: #ffffff;
    box-shadow: 0 2px 8px rgba(59, 130, 246, 0.4);
}

.main-container {
    max-width: 1280px;
    width: 100%;
    margin: 2rem auto;
    padding: 0 1.5rem;
    flex: 1;
}

.tab-content { display: none; animation: fadeIn 0.3s ease-in-out; }
.tab-content.active { display: block; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
    margin-bottom: 2rem;
}

.stat-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1.25rem;
    display: flex;
    align-items: center;
    gap: 1rem;
    box-shadow: var(--shadow-subtle);
    transition: var(--transition);
}

.stat-card:hover {
    border-color: var(--text-muted);
    transform: translateY(-2px);
}

.stat-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.3rem;
}

.stat-icon.blue { background: rgba(59, 130, 246, 0.15); color: var(--accent-blue); }
.stat-icon.green { background: rgba(16, 185, 129, 0.15); color: var(--accent-green); }
.stat-icon.purple { background: rgba(139, 92, 246, 0.15); color: var(--accent-purple); }
.stat-icon.yellow { background: rgba(245, 158, 11, 0.15); color: var(--accent-yellow); }
.stat-icon.red { background: rgba(239, 68, 68, 0.15); color: var(--accent-red); }

.stat-info h3 { font-size: 0.75rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }
.stat-info p { font-size: 1.4rem; font-weight: 700; color: var(--text-primary); margin-top: 0.1rem; }

.card-panel {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    margin-bottom: 2rem;
    box-shadow: var(--shadow-subtle);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.card-header h2 { font-size: 1.25rem; font-weight: 600; color: var(--text-primary); }

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.25rem;
}

.form-group { display: flex; flex-direction: column; gap: 0.5rem; }
.form-group.full-width { grid-column: 1 / -1; }

label { font-size: 0.875rem; font-weight: 500; color: var(--text-secondary); }

input[type="text"],
input[type="email"],
input[type="datetime-local"],
input[type="file"],
textarea,
select {
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition);
}

input:focus, textarea:focus, select:focus {
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

textarea { min-height: 180px; resize: vertical; }

.form-actions { display: flex; justify-content: flex-end; gap: 1rem; margin-top: 1.5rem; }

.btn {
    padding: 0.7rem 1.4rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    font-weight: 600;
    cursor: pointer;
    border: none;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-primary { background: var(--accent-blue); color: #ffffff; }
.btn-primary:hover { background: var(--accent-blue-hover); box-shadow: 0 4px 12px rgba(59, 130, 246, 0.3); }

.btn-secondary { background: var(--bg-card); color: var(--text-primary); border: 1px solid var(--border-color); }
.btn-secondary:hover { background: var(--bg-card-hover); }

.btn-success { background: var(--accent-green); color: #ffffff; }
.btn-success:hover { filter: brightness(1.1); }

.btn-action-edit {
    background: rgba(59, 130, 246, 0.15);
    color: #60a5fa;
    border: 1px solid rgba(59, 130, 246, 0.3);
    padding: 0.35rem 0.7rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}
.btn-action-edit:hover {
    background: var(--accent-blue);
    color: #ffffff;
}

.btn-danger-sm {
    background: rgba(239, 68, 68, 0.15);
    color: #f87171;
    border: 1px solid rgba(239, 68, 68, 0.3);
    padding: 0.35rem 0.7rem;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition);
}
.btn-danger-sm:hover {
    background: var(--accent-red);
    color: #ffffff;
    border-color: var(--accent-red);
}

/* Modais */
.modal-backdrop {
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0, 0, 0, 0.75);
    backdrop-filter: blur(4px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    animation: fadeIn 0.2s ease-out;
}

.modal-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 500px;
    padding: 2rem;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}
.modal-header h3 { font-size: 1.2rem; font-weight: 600; color: var(--text-primary); }
.modal-close { background: none; border: none; color: var(--text-muted); font-size: 1.4rem; cursor: pointer; }
.modal-close:hover { color: var(--text-primary); }

.search-bar {
    position: relative;
    max-width: 380px;
    width: 100%;
}
.search-bar input {
    width: 100%;
    padding-left: 2.5rem;
    background: var(--bg-main);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
}
.search-icon {
    position: absolute;
    left: 0.85rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.table-responsive { width: 100%; overflow-x: auto; }

table { width: 100%; border-collapse: collapse; font-size: 0.875rem; text-align: left; }
th {
    background: rgba(255, 255, 255, 0.02);
    color: var(--text-muted);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    padding: 1rem;
    border-bottom: 1px solid var(--border-color);
}
td { padding: 1rem; border-bottom: 1px solid var(--border-color); color: var(--text-secondary); }
tr:hover td { background: rgba(255, 255, 255, 0.015); color: var(--text-primary); }

.badge {
    display: inline-flex;
    align-items: center;
    padding: 0.25rem 0.65rem;
    border-radius: 9999px;
    font-size: 0.75rem;
    font-weight: 600;
}

.badge-pendente { background: var(--badge-pending-bg); color: var(--badge-pending-color); }
.badge-enviado  { background: var(--badge-sent-bg); color: var(--badge-sent-color); }
.badge-erro     { background: var(--badge-error-bg); color: var(--badge-error-color); }
.badge-ativo    { background: var(--badge-sent-bg); color: var(--badge-sent-color); }
.badge-inativo  { background: var(--badge-error-bg); color: var(--badge-error-color); }
.badge-aberto   { background: var(--badge-open-bg); color: var(--badge-open-color); }

.badge-grupo {
    background: rgba(59, 130, 246, 0.15);
    color: #60a5fa;
    border: 1px solid rgba(59, 130, 246, 0.3);
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 0.75rem;
    margin-right: 4px;
}

/* Quill Editor Customizations */
.ql-toolbar.ql-snow {
    background: var(--bg-card);
    border-color: var(--border-color) !important;
    border-top-left-radius: var(--radius-sm);
    border-top-right-radius: var(--radius-sm);
}
.ql-container.ql-snow {
    background: var(--bg-main);
    border-color: var(--border-color) !important;
    border-bottom-left-radius: var(--radius-sm);
    border-bottom-right-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    min-height: 220px;
}
.ql-snow .ql-stroke { stroke: var(--text-secondary) !important; }
.ql-snow .ql-fill { fill: var(--text-secondary) !important; }
.ql-snow .ql-picker { color: var(--text-secondary) !important; }

.editor-layout { display: grid; grid-template-columns: 1fr 1fr; gap: 1.5rem; }
@media (max-width: 900px) { .editor-layout { grid-template-columns: 1fr; } }

.preview-container {
    background: #ffffff;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border-color);
    height: 100%;
    min-height: 280px;
    padding: 1rem;
    color: #111827;
    overflow-y: auto;
}

.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    z-index: 999;
}

.toast {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 1rem 1.5rem;
    border-radius: var(--radius-md);
    box-shadow: 0 10px 30px rgba(0,0,0,0.5);
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 0.875rem;
    animation: slideIn 0.3s ease-out;
}

.toast.success { border-left: 4px solid var(--accent-green); }
.toast.error { border-left: 4px solid var(--accent-red); }

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

.helper-box {
    background: rgba(59, 130, 246, 0.08);
    border: 1px dashed rgba(59, 130, 246, 0.3);
    border-radius: var(--radius-sm);
    padding: 0.75rem 1rem;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.helper-box code {
    background: rgba(255, 255, 255, 0.1);
    color: #60a5fa;
    padding: 2px 6px;
    border-radius: 4px;
    font-family: monospace;
}

footer {
    text-align: center;
    padding: 1.5rem;
    color: var(--text-muted);
    font-size: 0.8rem;
    border-top: 1px solid var(--border-color);
}

/* Progress Bar nos Cards */
.card-progress-bar {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 2px;
    margin-top: 0.5rem;
    overflow: hidden;
}
.card-progress-fill {
    height: 100%;
    background: var(--accent-blue);
    width: 0%;
    transition: width 0.6s ease-in-out;
    border-radius: 2px;
}
.card-progress-fill.purple { background: var(--accent-purple); }
.card-progress-fill.green { background: var(--accent-green); }

/* Grid de Gráficos */
.charts-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}
@media (max-width: 900px) {
    .charts-grid { grid-template-columns: 1fr; }
}
.chart-card {
    background: var(--bg-surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    box-shadow: var(--shadow-subtle);
}
.chart-card h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}
.chart-container {
    position: relative;
    height: 250px;
    width: 100%;
}

/* Paginação */
.pagination-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 1.25rem;
    margin-top: 1rem;
    border-top: 1px solid var(--border-color);
}
.pagination-info { font-size: 0.85rem; color: var(--text-muted); }
.pagination-btns { display: flex; gap: 0.5rem; }
.page-btn {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.4rem 0.8rem;
    border-radius: var(--radius-sm);
    font-size: 0.8rem;
    cursor: pointer;
    transition: var(--transition);
}
.page-btn:hover:not(:disabled) {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
}
.page-btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

/* Skeleton Loaders */
@keyframes shimmer {
    0% { background-position: -200px 0; }
    100% { background-position: 200px 0; }
}
.skeleton-line {
    height: 16px;
    background: linear-gradient(90deg, #1f2937 25%, #374151 50%, #1f2937 75%);
    background-size: 400px 100%;
    animation: shimmer 1.5s infinite linear;
    border-radius: 4px;
    display: inline-block;
    width: 80%;
}

.email-view-container {
    background: #ffffff;
    border-radius: var(--radius-sm);
    padding: 1.5rem;
    color: #111827;
    max-height: 450px;
    overflow-y: auto;
    border: 1px solid var(--border-color);
}