:root {
    --primary: #00d9ff;
    --primary-hover: #00c4e8;
    --primary-glow: rgba(0, 217, 255, 0.3);
    --secondary: #64748b;
    --success: #10b981;
    --success-bg: rgba(16, 185, 129, 0.1);
    --danger: #ef4444;
    --danger-bg: rgba(239, 68, 68, 0.1);
    --warning: #f59e0b;
    --warning-bg: rgba(245, 158, 11, 0.1);
    --info: #3b82f6;
    --info-bg: rgba(59, 130, 246, 0.1);
    --dark: #0d0d14;
    --dark-card: #13131f;
    --dark-lighter: #1a1a2e;
    --dark-border: #2a2a3e;
    --text: #e2e8f0;
    --text-muted: #94a3b8;
    --radius: 8px;
    --radius-lg: 12px;
    --shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
    --sidebar-width: 260px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--dark);
    color: var(--text);
    min-height: 100vh;
    line-height: 1.5;
}

a { color: var(--primary); text-decoration: none; }
a:hover { opacity: 0.8; }

.layout { display: flex; min-height: 100vh; }

.sidebar {
    width: var(--sidebar-width);
    background: var(--dark-card);
    border-right: 1px solid var(--dark-border);
    position: fixed;
    top: 0;
    left: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
    z-index: 100;
    transition: transform 0.3s ease;
}

.sidebar-header {
    padding: 24px;
    border-bottom: 1px solid var(--dark-border);
}

.sidebar-logo { height: 36px; width: auto; }

.sidebar-nav { flex: 1; padding: 16px 12px; overflow-y: auto; }

.nav-section { margin-bottom: 24px; }

.nav-section-title {
    font-size: 11px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    padding: 8px 12px;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    color: var(--text-muted);
    text-decoration: none;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    transition: all 0.2s;
    margin-bottom: 4px;
}

.nav-link:hover { background: var(--dark-lighter); color: var(--text); opacity: 1; }
.nav-link.active { background: var(--primary); color: var(--dark); }
.nav-link.active svg { color: var(--dark); }
.nav-link svg { width: 20px; height: 20px; flex-shrink: 0; }

.nav-badge {
    margin-left: auto;
    background: var(--danger);
    color: white;
    font-size: 11px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 10px;
}

.sidebar-footer { padding: 16px; border-top: 1px solid var(--dark-border); }

.user-menu {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 12px;
    border-radius: var(--radius);
    cursor: pointer;
    transition: background 0.2s;
}

.user-menu:hover { background: var(--dark-lighter); }

.user-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--primary);
    color: var(--dark);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
    flex-shrink: 0;
}

.user-avatar.staff { background: var(--success); color: white; }

.user-info { flex: 1; min-width: 0; }
.user-name { font-size: 14px; font-weight: 600; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.user-email { font-size: 12px; color: var(--text-muted); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }

.main-content { flex: 1; margin-left: var(--sidebar-width); min-height: 100vh; }

.topbar {
    background: var(--dark-card);
    border-bottom: 1px solid var(--dark-border);
    padding: 16px 32px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 0;
    z-index: 50;
}

.topbar-left { display: flex; align-items: center; gap: 16px; }
.topbar-right { display: flex; align-items: center; gap: 12px; }

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text);
    cursor: pointer;
    padding: 8px;
    border-radius: var(--radius);
}

.menu-toggle:hover { background: var(--dark-lighter); }
.menu-toggle svg { width: 24px; height: 24px; display: block; }

.page-title { font-size: 20px; font-weight: 600; }

.back-link {
    display: flex;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-size: 14px;
}

.back-link:hover { color: var(--primary); opacity: 1; }
.back-link svg { width: 20px; height: 20px; }

.content { padding: 32px; }

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 14px;
    font-weight: 600;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
}

.btn svg { width: 18px; height: 18px; }
.btn-sm { padding: 6px 12px; font-size: 13px; }
.btn-sm svg { width: 16px; height: 16px; }
.btn-lg { padding: 14px 28px; font-size: 16px; }

.btn-primary { background: var(--primary); color: var(--dark); }
.btn-primary:hover { background: var(--primary-hover); box-shadow: 0 0 20px var(--primary-glow); opacity: 1; }

.btn-secondary { background: var(--dark-lighter); color: var(--text); border: 1px solid var(--dark-border); }
.btn-secondary:hover { background: var(--dark-border); opacity: 1; }

.btn-success { background: var(--success); color: white; }
.btn-success:hover { background: #0ea472; opacity: 1; }

.btn-danger { background: var(--danger); color: white; }
.btn-danger:hover { background: #dc2626; opacity: 1; }

.btn-warning { background: var(--warning); color: var(--dark); }

.btn-outline { background: transparent; border: 1px solid var(--dark-border); color: var(--text); }
.btn-outline:hover { background: var(--dark-lighter); opacity: 1; }

.btn:disabled { opacity: 0.5; cursor: not-allowed; }

.card {
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-lg);
}

.card-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--dark-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.card-title { font-size: 16px; font-weight: 600; }
.card-body { padding: 24px; }

.form-group { margin-bottom: 20px; }

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text);
    margin-bottom: 8px;
}

.form-input, .form-select, .form-textarea {
    width: 100%;
    padding: 12px 14px;
    font-size: 15px;
    background: var(--dark);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius);
    color: var(--text);
    transition: border-color 0.2s, box-shadow 0.2s;
    outline: none;
}

.form-input:focus, .form-select:focus, .form-textarea:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.form-input::placeholder, .form-textarea::placeholder { color: var(--text-muted); }

.form-select { cursor: pointer; }
.form-textarea { min-height: 120px; resize: vertical; font-family: inherit; }

.form-error { color: var(--danger); font-size: 13px; margin-top: 6px; }
.form-hint { color: var(--text-muted); font-size: 13px; margin-top: 6px; }

.form-row { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    color: var(--text);
    cursor: pointer;
}

.checkbox-label input { width: 18px; height: 18px; accent-color: var(--primary); }

.table { width: 100%; border-collapse: collapse; }

.table th {
    text-align: left;
    padding: 14px 24px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    background: var(--dark-lighter);
    border-bottom: 1px solid var(--dark-border);
}

.table td {
    padding: 16px 24px;
    font-size: 14px;
    border-bottom: 1px solid var(--dark-border);
}

.table tr:last-child td { border-bottom: none; }
.table tr:hover td { background: var(--dark-lighter); }

.table-responsive { overflow-x: auto; }

.badge {
    display: inline-flex;
    align-items: center;
    padding: 4px 10px;
    font-size: 12px;
    font-weight: 600;
    border-radius: 20px;
}

.badge-new { background: var(--info-bg); color: var(--info); }
.badge-open { background: var(--success-bg); color: var(--success); }
.badge-in-progress { background: var(--primary-glow); color: var(--primary); }
.badge-waiting { background: var(--warning-bg); color: var(--warning); }
.badge-resolved { background: var(--success-bg); color: var(--success); }
.badge-closed { background: var(--dark-lighter); color: var(--text-muted); }
.badge-success { background: var(--success-bg); color: var(--success); }
.badge-warning { background: var(--warning-bg); color: var(--warning); }
.badge-danger { background: var(--danger-bg); color: var(--danger); }
.badge-secondary { background: var(--dark-lighter); color: var(--text-muted); }

.priority-low { color: var(--success); }
.priority-medium { color: var(--warning); }
.priority-high { color: var(--danger); }
.priority-urgent { color: var(--danger); font-weight: 700; }

.ticket-id { font-weight: 600; color: var(--primary); }

.ticket-subject a { color: var(--text); text-decoration: none; }
.ticket-subject a:hover { color: var(--primary); }

.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-bottom: 32px; }

.stat-card {
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: all 0.2s;
}

.stat-card:hover { border-color: var(--primary); box-shadow: 0 0 20px rgba(0, 217, 255, 0.1); }

.stat-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 16px;
}

.stat-icon svg { width: 24px; height: 24px; }
.stat-icon.primary { background: var(--primary-glow); color: var(--primary); }
.stat-icon.success { background: var(--success-bg); color: var(--success); }
.stat-icon.warning { background: var(--warning-bg); color: var(--warning); }
.stat-icon.info { background: var(--info-bg); color: var(--info); }
.stat-icon.danger { background: var(--danger-bg); color: var(--danger); }

.stat-value { font-size: 32px; font-weight: 700; margin-bottom: 4px; }
.stat-label { font-size: 14px; color: var(--text-muted); }

.alert {
    padding: 14px 16px;
    border-radius: var(--radius);
    font-size: 14px;
    margin-bottom: 20px;
}

.alert-success { background: var(--success-bg); color: #6ee7b7; border: 1px solid rgba(16, 185, 129, 0.3); }
.alert-danger { background: var(--danger-bg); color: #fca5a5; border: 1px solid rgba(239, 68, 68, 0.3); }
.alert-warning { background: var(--warning-bg); color: #fcd34d; border: 1px solid rgba(245, 158, 11, 0.3); }
.alert-info { background: var(--info-bg); color: #93c5fd; border: 1px solid rgba(59, 130, 246, 0.3); }

.milestone-tracker {
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    margin-bottom: 24px;
}

.milestone-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 24px;
}

.milestone-title {
    font-size: 16px;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 10px;
}

.milestone-title svg { width: 20px; height: 20px; color: var(--primary); }
.milestone-progress-text { font-size: 14px; color: var(--text-muted); }
.milestone-progress-text span { color: var(--primary); font-weight: 600; }

.milestone-bar {
    position: relative;
    display: flex;
    justify-content: space-between;
    margin-bottom: 16px;
}

.milestone-line {
    position: absolute;
    top: 20px;
    left: 24px;
    right: 24px;
    height: 4px;
    background: var(--dark-border);
    border-radius: 2px;
    z-index: 1;
}

.milestone-line-progress {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    background: linear-gradient(90deg, var(--primary), var(--success));
    border-radius: 2px;
    transition: width 0.5s ease;
    box-shadow: 0 0 10px var(--primary-glow);
}

.milestone-step {
    position: relative;
    z-index: 2;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    flex: 1;
}

.milestone-icon {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--dark-lighter);
    border: 3px solid var(--dark-border);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 12px;
    transition: all 0.3s ease;
}

.milestone-icon svg { width: 18px; height: 18px; color: var(--text-muted); transition: all 0.3s ease; }

.milestone-step.completed .milestone-icon {
    background: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 0 20px var(--primary-glow), 0 0 40px rgba(0, 217, 255, 0.2);
}

.milestone-step.completed .milestone-icon svg { color: var(--dark); }

.milestone-step.active .milestone-icon {
    background: var(--dark-card);
    border-color: var(--primary);
    box-shadow: 0 0 20px var(--primary-glow);
    animation: pulse 2s infinite;
}

.milestone-step.active .milestone-icon svg { color: var(--primary); }

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 20px var(--primary-glow); }
    50% { box-shadow: 0 0 30px var(--primary-glow), 0 0 50px rgba(0, 217, 255, 0.3); }
}

.milestone-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    max-width: 80px;
    transition: color 0.3s ease;
}

.milestone-step.completed .milestone-label,
.milestone-step.active .milestone-label { color: var(--text); }

.milestone-date { font-size: 11px; color: var(--text-muted); margin-top: 4px; }
.milestone-step.completed .milestone-date { color: var(--success); }

.message { display: flex; gap: 16px; margin-bottom: 24px; }
.message:last-child { margin-bottom: 0; }

.message-avatar {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 14px;
    flex-shrink: 0;
}

.message-avatar.client { background: var(--primary); color: var(--dark); }
.message-avatar.staff { background: var(--success); color: white; }

.message-content { flex: 1; min-width: 0; }

.message-header { display: flex; align-items: center; gap: 12px; margin-bottom: 8px; flex-wrap: wrap; }
.message-author { font-weight: 600; font-size: 14px; }

.message-role {
    font-size: 11px;
    font-weight: 600;
    padding: 2px 8px;
    border-radius: 4px;
    text-transform: uppercase;
}

.message-role.staff { background: var(--success-bg); color: var(--success); }
.message-role.internal { background: var(--warning-bg); color: var(--warning); }

.message-time { font-size: 12px; color: var(--text-muted); margin-left: auto; }

.message-body {
    background: var(--dark-lighter);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius);
    padding: 16px;
    font-size: 14px;
    line-height: 1.6;
}

.message-body p { margin-bottom: 12px; }
.message-body p:last-child { margin-bottom: 0; }

.message-body.internal {
    background: rgba(245, 158, 11, 0.1);
    border-color: rgba(245, 158, 11, 0.3);
}

.attachment {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    background: var(--dark);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius);
    font-size: 13px;
    color: var(--text);
    text-decoration: none;
    transition: all 0.2s;
    margin-right: 8px;
    margin-top: 8px;
}

.attachment:hover { border-color: var(--primary); color: var(--primary); opacity: 1; }
.attachment svg { width: 16px; height: 16px; }

.filters {
    display: flex;
    gap: 16px;
    margin-bottom: 24px;
    flex-wrap: wrap;
    align-items: center;
}

.filters .form-input,
.filters .form-select {
    width: auto;
    min-width: 150px;
}

.search-input {
    position: relative;
    flex: 1;
    min-width: 200px;
    max-width: 300px;
}

.search-input input { padding-left: 40px; }

.search-input svg {
    position: absolute;
    left: 14px;
    top: 50%;
    transform: translateY(-50%);
    width: 18px;
    height: 18px;
    color: var(--text-muted);
}

.pagination {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-top: 24px;
}

.pagination-link {
    padding: 8px 14px;
    background: var(--dark-lighter);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius);
    color: var(--text);
    font-size: 14px;
    text-decoration: none;
}

.pagination-link:hover { background: var(--dark-border); opacity: 1; }
.pagination-link.active { background: var(--primary); color: var(--dark); border-color: var(--primary); }

.empty-state {
    text-align: center;
    padding: 48px 24px;
}

.empty-state svg {
    width: 64px;
    height: 64px;
    color: var(--text-muted);
    margin-bottom: 16px;
}

.empty-state h3 { font-size: 18px; font-weight: 600; margin-bottom: 8px; }
.empty-state p { color: var(--text-muted); font-size: 14px; margin-bottom: 16px; }

.mobile-overlay {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    z-index: 99;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.2s;
}

.modal-overlay.active { opacity: 1; visibility: visible; }

.modal {
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius-lg);
    width: 100%;
    max-width: 500px;
    max-height: 90vh;
    overflow-y: auto;
    transform: scale(0.95);
    transition: transform 0.2s;
}

.modal-overlay.active .modal { transform: scale(1); }

.modal-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--dark-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.modal-title { font-size: 18px; font-weight: 600; }

.modal-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: 4px;
}

.modal-close:hover { color: var(--text); }
.modal-close svg { width: 24px; height: 24px; }

.modal-body { padding: 24px; }

.modal-footer {
    padding: 16px 24px;
    border-top: 1px solid var(--dark-border);
    display: flex;
    justify-content: flex-end;
    gap: 12px;
}

.tabs {
    display: flex;
    gap: 4px;
    border-bottom: 1px solid var(--dark-border);
    margin-bottom: 24px;
}

.tab {
    padding: 12px 20px;
    color: var(--text-muted);
    font-weight: 500;
    cursor: pointer;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    transition: all 0.2s;
}

.tab:hover { color: var(--text); }
.tab.active { color: var(--primary); border-bottom-color: var(--primary); }

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    background: var(--dark-card);
    border: 1px solid var(--dark-border);
    border-radius: var(--radius);
    min-width: 180px;
    box-shadow: var(--shadow);
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transform: translateY(10px);
    transition: all 0.2s;
}

.dropdown.active .dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(4px);
}

.dropdown-item {
    display: block;
    padding: 10px 16px;
    color: var(--text);
    font-size: 14px;
    text-decoration: none;
    transition: background 0.2s;
}

.dropdown-item:hover { background: var(--dark-lighter); opacity: 1; }
.dropdown-divider { height: 1px; background: var(--dark-border); margin: 4px 0; }

.login-container { width: 100%; max-width: 420px; margin: 0 auto; }

.login-card {
    background: var(--dark-card);
    border-radius: 16px;
    box-shadow: var(--shadow);
    border: 1px solid var(--dark-border);
    overflow: hidden;
}

.login-header {
    padding: 40px 32px 32px;
    text-align: center;
    border-bottom: 1px solid var(--dark-border);
}

.login-header h1 { color: var(--text); font-size: 22px; font-weight: 600; margin: 0; }
.login-header p { color: var(--text-muted); font-size: 14px; margin-top: 8px; }

.login-body { padding: 32px; }

.login-footer {
    text-align: center;
    padding: 24px 32px;
    border-top: 1px solid var(--dark-border);
    background: rgba(0, 0, 0, 0.2);
}

.login-footer p { font-size: 14px; color: var(--text-muted); }

.spinner {
    width: 18px;
    height: 18px;
    border: 2px solid rgba(13, 13, 20, 0.3);
    border-top-color: var(--dark);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    display: none;
}

@keyframes spin { to { transform: rotate(360deg); } }

.loading .spinner { display: block; }
.loading .btn-text { display: none; }

@media (max-width: 1200px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .sidebar { transform: translateX(-100%); }
    .sidebar.open { transform: translateX(0); }
    .mobile-overlay.show { display: block; }
    .main-content { margin-left: 0; }
    .menu-toggle { display: block; }
    .topbar { padding: 16px; }
    .content { padding: 16px; }
    .stats-grid { grid-template-columns: 1fr; }
    .form-row { grid-template-columns: 1fr; }
    .filters { flex-direction: column; align-items: stretch; }
    .filters .form-input, .filters .form-select { width: 100%; }
    .search-input { max-width: none; }
    .table { min-width: 600px; }
    .message { flex-direction: column; gap: 12px; }
    .message-time { margin-left: 0; }
    .milestone-line { display: none; }
    .milestone-bar { flex-wrap: wrap; gap: 16px; }
    .milestone-step { flex: 0 0 calc(33.333% - 12px); }
}