/* ============================================
   Chaitanya Hearing Aid Clinic CRM - Modern .NET Enterprise Style
   ============================================ */

:root {
    --primary: #0078d4;
    --primary-dark: #106ebe;
    --primary-light: #deecf9;
    --secondary: #605e5c;
    --accent: #00b7c3;
    --success: #107c10;
    --warning: #ff8c00;
    --danger: #d13438;

    --bg-body: #faf9f8;
    --bg-card: #ffffff;
    --bg-sidebar: #1b1b1f;
    --bg-sidebar-hover: #2d2d32;
    --bg-sidebar-active: #0078d4;
    --bg-header: #ffffff;
    --bg-table-header: #f3f2f1;

    --text-primary: #323130;
    --text-secondary: #605e5c;
    --text-muted: #a19f9d;
    --text-white: #ffffff;
    --text-sidebar: #b3b0ad;

    --border-color: #edebe9;
    --border-radius: 4px;
    --border-radius-lg: 8px;
    --sidebar-width: 260px;
    --header-height: 56px;
    --shadow-card: 0 1.6px 3.6px 0 rgba(0,0,0,0.132), 0 0.3px 0.9px 0 rgba(0,0,0,0.108);
    --shadow-lg: 0 4px 16px rgba(0,0,0,0.12);
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, 'Roboto', sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-body);
    color: var(--text-primary);
    font-size: 14px;
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a { text-decoration: none; }

/* === LAYOUT === */
.wrapper { display: flex; width: 100%; min-height: 100vh; }

/* === SIDEBAR === */
#sidebar {
    width: var(--sidebar-width);
    min-height: 100vh;
    position: fixed;
    top: 0; left: 0;
    z-index: 1000;
    background: var(--bg-sidebar);
    transition: var(--transition);
    overflow-y: auto;
    overflow-x: hidden;
    border-right: 1px solid rgba(255,255,255,0.05);
    display: flex;
    flex-direction: column;
}

/* Desktop: collapsed (hidden) */
#sidebar.collapsed { margin-left: calc(-1 * var(--sidebar-width)); }

/* Sidebar scrollbar */
#sidebar::-webkit-scrollbar { width: 4px; }
#sidebar::-webkit-scrollbar-track { background: transparent; }
#sidebar::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 2px; }
#sidebar::-webkit-scrollbar-thumb:hover { background: rgba(255,255,255,0.2); }

#sidebar .sidebar-header {
    padding: 16px 18px;
    border-bottom: 1px solid rgba(255,255,255,0.06);
    display: flex;
    align-items: center;
    gap: 12px;
    flex-shrink: 0;
}

#sidebar .sidebar-header .logo-icon {
    width: 36px; height: 36px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    overflow: hidden;
}

#sidebar .sidebar-header .logo-icon img {
    width: 100%; height: 100%;
    object-fit: contain;
}

#sidebar .sidebar-header .brand-text {
    overflow: hidden;
    min-width: 0;
}

#sidebar .sidebar-header .brand-name {
    color: var(--text-white);
    font-size: 14px;
    font-weight: 700;
    letter-spacing: -0.2px;
    margin: 0;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    line-height: 1.3;
}

#sidebar .sidebar-header .brand-sub {
    font-size: 10px;
    color: var(--text-muted);
    font-weight: 500;
    letter-spacing: 0.3px;
    text-transform: uppercase;
}

.sidebar-nav {
    flex: 1;
    overflow-y: auto;
    overflow-x: hidden;
    padding-bottom: 20px;
}

#sidebar .nav-section {
    padding: 18px 20px 6px;
    font-size: 10px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1.2px;
    color: rgba(255,255,255,0.3);
}

#sidebar .nav-section:first-child { padding-top: 14px; }

#sidebar ul { list-style: none; padding: 4px 10px; margin: 0; }
#sidebar ul li { margin-bottom: 1px; }

#sidebar ul li a {
    display: flex;
    align-items: center;
    padding: 9px 14px;
    color: var(--text-sidebar);
    border-radius: 6px;
    transition: var(--transition);
    font-size: 13px;
    font-weight: 400;
    gap: 11px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

#sidebar ul li a i { font-size: 16px; width: 20px; text-align: center; opacity: 0.6; flex-shrink: 0; }
#sidebar ul li a:hover { background: var(--bg-sidebar-hover); color: var(--text-white); }
#sidebar ul li a:hover i { opacity: 1; }
#sidebar ul li.active a { background: var(--bg-sidebar-active); color: var(--text-white); font-weight: 500; }
#sidebar ul li.active a i { opacity: 1; }

/* === CONTENT === */
#content {
    width: calc(100% - var(--sidebar-width));
    margin-left: var(--sidebar-width);
    transition: var(--transition);
    min-height: 100vh;
}

#content.expanded { width: 100%; margin-left: 0; }

/* === TOP NAVBAR === */
.top-navbar {
    height: var(--header-height);
    background: var(--bg-header);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    padding: 0 24px;
    position: sticky;
    top: 0;
    z-index: 900;
    box-shadow: 0 1px 2px rgba(0,0,0,0.05);
}

.top-navbar .nav-left { display: flex; align-items: center; gap: 16px; }
.top-navbar .nav-right { display: flex; align-items: center; gap: 16px; margin-left: auto; }

#sidebarCollapse {
    background: none;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 6px 10px;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
}

#sidebarCollapse:hover { background: var(--bg-table-header); color: var(--text-primary); }

.user-menu {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 6px 12px;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: var(--transition);
}

.user-menu:hover { background: var(--bg-table-header); }

.user-avatar {
    width: 32px; height: 32px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 13px;
    font-weight: 600;
}

.user-info { line-height: 1.3; }
.user-info .name { font-size: 13px; font-weight: 600; color: var(--text-primary); }
.user-info .role { font-size: 11px; color: var(--text-muted); text-transform: capitalize; }

/* === MAIN CONTENT === */
.main-content { padding: 24px; }

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

.page-header h4 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: -0.3px;
    margin: 0;
}

.page-header .subtitle { font-size: 13px; color: var(--text-muted); margin-top: 2px; }

/* === STAT CARDS === */
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-card);
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.stat-card:hover { transform: translateY(-2px); box-shadow: var(--shadow-lg); }

.stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0;
    width: 4px;
    height: 100%;
}

.stat-card.patients::before { background: var(--primary); }
.stat-card.tests::before { background: var(--success); }
.stat-card.devices::before { background: var(--warning); }
.stat-card.appointments::before { background: var(--danger); }

.stat-card .stat-icon {
    width: 44px; height: 44px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
}

.stat-card.patients .stat-icon { background: var(--primary-light); color: var(--primary); }
.stat-card.tests .stat-icon { background: #dff6dd; color: var(--success); }
.stat-card.devices .stat-icon { background: #fff4ce; color: var(--warning); }
.stat-card.appointments .stat-icon { background: #fde7e9; color: var(--danger); }

.stat-card .stat-value {
    font-size: 28px;
    font-weight: 700;
    color: var(--text-primary);
    line-height: 1;
    margin-top: 12px;
}

.stat-card .stat-label {
    font-size: 12px;
    color: var(--text-muted);
    font-weight: 500;
    margin-top: 4px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* === DATA TABLE === */
.table-container {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-card);
    overflow: hidden;
}

.table-container .table-header {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.table-container .table-header h5 {
    font-size: 15px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.table-toolbar {
    padding: 12px 20px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    gap: 12px;
    align-items: center;
    background: var(--bg-table-header);
}

.table-toolbar .search-box { position: relative; flex: 1; max-width: 320px; }

.table-toolbar .search-box input {
    padding: 7px 12px 7px 36px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 13px;
    width: 100%;
    background: var(--bg-card);
    transition: var(--transition);
}

.table-toolbar .search-box input:focus { outline: none; border-color: var(--primary); box-shadow: 0 0 0 1px var(--primary); }

.table-toolbar .search-box i {
    position: absolute;
    left: 12px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-muted);
    font-size: 14px;
}

.table { margin-bottom: 0; font-size: 13px; }

.table thead th {
    background: var(--bg-table-header);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    padding: 12px 16px;
    white-space: nowrap;
}

.table tbody td {
    padding: 12px 16px;
    border-bottom: 1px solid var(--border-color);
    vertical-align: middle;
    color: var(--text-primary);
}

.table tbody tr:hover { background: #f5f5f5; }
.table tbody tr:last-child td { border-bottom: none; }

/* === FORM === */
.form-container {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-card);
    overflow: hidden;
}

.form-header {
    padding: 16px 24px;
    border-bottom: 1px solid var(--border-color);
    background: var(--bg-table-header);
}

.form-header h5 { font-size: 15px; font-weight: 600; color: var(--text-primary); margin: 0; }

.form-body { padding: 24px; }

.form-label { font-size: 13px; font-weight: 600; color: var(--text-secondary); margin-bottom: 6px; }

.form-control, .form-select {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 13px;
    padding: 8px 12px;
    transition: var(--transition);
    color: var(--text-primary);
}

.form-control:focus, .form-select:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 1px var(--primary);
}

.form-control::placeholder { color: var(--text-muted); }

/* === BUTTONS === */
.btn {
    font-size: 13px;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: var(--border-radius);
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 6px;
    border: 1px solid transparent;
}

.btn-primary { background: var(--primary); border-color: var(--primary); color: white; }
.btn-primary:hover { background: var(--primary-dark); border-color: var(--primary-dark); box-shadow: 0 2px 8px rgba(0,0,0,0.08); }
.btn-success { background: var(--success); border-color: var(--success); }
.btn-success:hover { filter: brightness(1.1); }
.btn-danger { background: var(--danger); border-color: var(--danger); }
.btn-danger:hover { filter: brightness(1.1); }

.btn-outline-primary { background: transparent; border-color: var(--primary); color: var(--primary); }
.btn-outline-primary:hover { background: var(--primary); color: white; }
.btn-outline-secondary { background: transparent; border-color: var(--border-color); color: var(--text-secondary); }
.btn-outline-secondary:hover { background: var(--bg-table-header); border-color: var(--text-secondary); color: var(--text-primary); }
.btn-outline-danger { background: transparent; border-color: var(--danger); color: var(--danger); }
.btn-outline-danger:hover { background: var(--danger); color: white; }

.btn-sm { padding: 5px 10px; font-size: 12px; }
.btn-lg { padding: 12px 24px; font-size: 15px; }

.action-buttons { display: flex; gap: 4px; }
.action-buttons .btn { padding: 4px 8px; font-size: 13px; }

/* === BADGES === */
.badge { font-size: 11px; font-weight: 600; padding: 4px 10px; border-radius: 12px; letter-spacing: 0.3px; }
.badge-status-active { background: #dff6dd; color: #107c10; }
.badge-status-inactive { background: #f3f2f1; color: #605e5c; }
.badge-status-scheduled { background: #deecf9; color: #0078d4; }
.badge-status-completed { background: #dff6dd; color: #107c10; }
.badge-status-cancelled { background: #f3f2f1; color: #605e5c; }
.badge-status-noshow { background: #fde7e9; color: #d13438; }

.badge-type { padding: 3px 8px; border-radius: 4px; font-size: 11px; font-weight: 600; }
.badge-bte { background: #deecf9; color: #0078d4; }
.badge-ric { background: #dff6dd; color: #107c10; }
.badge-ite { background: #fff4ce; color: #ca5010; }
.badge-itc { background: #e8d5f5; color: #8764b8; }
.badge-cic { background: #fde7e9; color: #d13438; }
.badge-iic { background: #d2f4ef; color: #038387; }

/* === CARDS === */
.card {
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-card);
    background: var(--bg-card);
}

.card-header {
    background: var(--bg-table-header);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 16px;
    font-weight: 600;
    font-size: 13px;
}

.card-body { padding: 16px; }

/* === ALERTS === */
.alert {
    border-radius: var(--border-radius);
    padding: 12px 16px;
    font-size: 13px;
    border: none;
    display: flex;
    align-items: center;
    gap: 10px;
}

.alert-success { background: #dff6dd; color: #107c10; }
.alert-danger { background: #fde7e9; color: #d13438; }
.alert-warning { background: #fff4ce; color: #ca5010; }
.alert-info { background: #deecf9; color: #0078d4; }

/* === LOGIN === */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1b1b1f 0%, #2d2d32 50%, #1b1b1f 100%);
    position: relative;
    overflow: hidden;
}

.login-wrapper::before {
    content: '';
    position: absolute;
    width: 600px; height: 600px;
    background: var(--primary);
    border-radius: 50%;
    opacity: 0.05;
    top: -200px; right: -100px;
}

.login-wrapper::after {
    content: '';
    position: absolute;
    width: 400px; height: 400px;
    background: var(--accent);
    border-radius: 50%;
    opacity: 0.05;
    bottom: -100px; left: -50px;
}

.login-box {
    background: var(--bg-card);
    border-radius: 12px;
    box-shadow: var(--shadow-lg);
    padding: 40px;
    width: 100%;
    max-width: 420px;
    position: relative;
    z-index: 1;
}

.login-box .login-logo {
    width: 64px; height: 64px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    overflow: hidden;
}

.login-box h2 {
    font-size: 22px;
    font-weight: 700;
    color: var(--text-primary);
    text-align: center;
    margin-bottom: 4px;
}

.login-box .login-subtitle {
    text-align: center;
    color: var(--text-muted);
    font-size: 13px;
    margin-bottom: 28px;
}

/* === AUDIOGRAM === */
.audiogram-canvas { border: 1px solid var(--border-color); border-radius: 4px; }

.legend-container {
    display: flex;
    justify-content: center;
    gap: 24px;
    padding: 12px;
    background: var(--bg-table-header);
    border-radius: var(--border-radius);
    margin: 16px 0;
}

.legend-item { display: flex; align-items: center; gap: 8px; font-size: 13px; color: var(--text-secondary); }
.legend-symbol { font-weight: 700; font-size: 16px; }
.legend-symbol.right { color: var(--danger); }
.legend-symbol.left { color: var(--primary); }

.frequency-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 8px; }
.frequency-grid .freq-item { text-align: center; }
.frequency-grid .freq-label { font-size: 11px; font-weight: 600; color: var(--text-muted); text-transform: uppercase; margin-bottom: 4px; }
.frequency-grid input { text-align: center; font-weight: 600; }

/* === REPORT === */
.report-container {
    background: var(--bg-card);
    max-width: 900px;
    margin: 20px auto;
    box-shadow: var(--shadow-lg);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.report-header {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    color: white;
    padding: 24px 30px;
    text-align: center;
}

.report-header h2 { font-size: 22px; font-weight: 700; margin: 0; }
.report-header p { opacity: 0.85; font-size: 13px; margin-top: 4px; }
.report-body { padding: 30px; }

.patient-info-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
    padding: 16px;
    background: var(--bg-table-header);
    border-radius: var(--border-radius);
    margin-bottom: 24px;
}

.patient-info-grid .info-item { display: flex; gap: 8px; font-size: 13px; }
.patient-info-grid .info-item strong { color: var(--text-secondary); min-width: 100px; }

.audiogram-section { display: flex; gap: 24px; margin: 24px 0; }
.audiogram-box { flex: 1; text-align: center; }
.audiogram-box h5 { font-size: 14px; font-weight: 600; margin-bottom: 12px; color: var(--text-secondary); }

.results-table { width: 100%; border-collapse: collapse; margin: 20px 0; font-size: 13px; }
.results-table th, .results-table td { border: 1px solid var(--border-color); padding: 10px 16px; text-align: center; }
.results-table th { background: var(--bg-table-header); font-weight: 600; font-size: 12px; text-transform: uppercase; letter-spacing: 0.5px; }

.diagnosis-section { padding: 16px; border: 1px solid var(--border-color); border-radius: var(--border-radius); margin: 16px 0; }
.diagnosis-section h6 { font-size: 12px; font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; color: var(--text-secondary); margin-bottom: 8px; }

.signature-section { display: flex; justify-content: space-between; margin-top: 40px; padding-top: 20px; border-top: 1px solid var(--border-color); }
.signature-box { text-align: center; }
.signature-line { width: 200px; border-top: 1px solid var(--text-primary); margin-top: 50px; padding-top: 8px; font-weight: 600; font-size: 14px; }

/* === EMPTY STATE === */
.empty-state { text-align: center; padding: 48px 24px; color: var(--text-muted); }
.empty-state i { font-size: 48px; margin-bottom: 16px; opacity: 0.4; }
.empty-state p { font-size: 14px; margin-bottom: 16px; }

/* === SETTINGS === */
.settings-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }

/* === SIDEBAR OVERLAY (mobile) === */
#sidebarOverlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 999;
    opacity: 0;
    transition: opacity 0.3s ease;
}

#sidebarOverlay.active {
    display: block;
    opacity: 1;
}

/* === PRINT === */
@media print {
    .no-print, #sidebar, .top-navbar, #sidebarOverlay { display: none !important; }
    #content { margin-left: 0 !important; width: 100% !important; }
    .report-container { box-shadow: none; border-radius: 0; }
    .report-header { -webkit-print-color-adjust: exact; print-color-adjust: exact; }
    body { background: white; }
}

/* === RESPONSIVE: Tablet (≤992px) === */
@media (max-width: 992px) {
    /* Sidebar: off-screen by default, slides over content when .active */
    #sidebar {
        margin-left: calc(-1 * var(--sidebar-width));
        z-index: 1050;
        box-shadow: none;
    }
    #sidebar.active {
        margin-left: 0;
        box-shadow: 4px 0 24px rgba(0,0,0,0.3);
    }
    /* Disable desktop collapse class on mobile */
    #sidebar.collapsed {
        margin-left: calc(-1 * var(--sidebar-width));
    }

    /* Content: always full width on tablet/mobile */
    #content,
    #content.expanded {
        width: 100%;
        margin-left: 0;
    }

    .frequency-grid { grid-template-columns: repeat(4, 1fr); }

    /* Table: horizontal scroll hint */
    .table-container { overflow-x: auto; }
    .table-header { flex-wrap: wrap; gap: 8px; }
    .table-toolbar { flex-wrap: wrap; }
}

/* === RESPONSIVE: Mobile (≤768px) === */
@media (max-width: 768px) {
    .main-content { padding: 16px; }
    .top-navbar { padding: 0 16px; }
    .top-navbar .nav-left span { display: none; }

    .page-header { flex-direction: column; gap: 12px; align-items: flex-start; }
    .page-header .btn { width: 100%; justify-content: center; }

    .audiogram-section { flex-direction: column; }
    .patient-info-grid { grid-template-columns: 1fr; }
    .settings-grid { grid-template-columns: 1fr; }

    /* Stack form columns on mobile */
    .form-body .row > [class*="col-md-"] { flex: 0 0 100%; max-width: 100%; }

    /* Stack stat cards 2-column on mobile */
    .stat-card .stat-value { font-size: 22px; }

    /* User info hidden on small screens */
    .user-info { display: none; }

    /* Action buttons: wrap */
    .action-buttons { flex-wrap: wrap; }

    /* Table header stacks */
    .table-header { flex-direction: column; align-items: flex-start; gap: 8px; }
    .table-toolbar .search-box { max-width: 100%; }
}

/* === RESPONSIVE: Small phone (≤480px) === */
@media (max-width: 480px) {
    .main-content { padding: 12px; }
    .form-body { padding: 16px; }
    .form-header { padding: 12px 16px; }
    .table-container .table-header { padding: 12px 16px; }
    .table-toolbar { padding: 10px 16px; }

    .stat-card { padding: 14px; }
    .stat-card .stat-value { font-size: 20px; }
    .stat-card .stat-icon { width: 36px; height: 36px; font-size: 16px; }

    .login-box { padding: 24px; margin: 16px; }
}

::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: #c8c6c4; border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: #a19f9d; }