/********** Premium UI Modernization CSS **********/
:root {
    /* Color Palette */
    --primary: #007AFF; /* Apple Blue */
    --primary-dark: #005bb5;
    --secondary: #32D74B; /* Apple Green */
    --light: #F5F5F7; /* Apple Gray/Silver Background */
    --dark: #1D1D1F; /* Apple Dark Text */
    --surface: #FFFFFF;
    --text-primary: #1D1D1F;
    --text-secondary: #86868B;
    --border-color: rgba(0, 0, 0, 0.1);
    
    /* Glassmorphism */
    --glass-bg: rgba(255, 255, 255, 0.75);
    --glass-border: rgba(255, 255, 255, 0.3);
    --glass-blur: 20px;
    
    /* Shadows */
    --shadow-sm: 0 4px 14px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 20px 40px rgba(0, 0, 0, 0.12);
    
    /* Border Radius */
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --radius-pill: 50px;
}

/* Dark Mode Configuration (Automatic based on OS preference) */
@media (prefers-color-scheme: dark) {
    :root {
        --light: #000000;
        --dark: #F5F5F7;
        --surface: #1C1C1E;
        --text-primary: #F5F5F7;
        --text-secondary: #A1A1A6;
        --border-color: rgba(255, 255, 255, 0.1);
        --glass-bg: rgba(28, 28, 30, 0.75);
        --glass-border: rgba(255, 255, 255, 0.1);
        --shadow-sm: 0 4px 14px rgba(0, 0, 0, 0.4);
        --shadow-md: 0 10px 30px rgba(0, 0, 0, 0.6);
    }
}

/* Base Styles */
body {
    background-color: var(--light);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    transition: background-color 0.3s ease, color 0.3s ease;
    line-height: 1.6;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    font-weight: 700;
    letter-spacing: -0.02em;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

a:hover {
    color: var(--primary-dark);
}

/* Form Overrides for Dark Mode */
.form-control, .form-select {
    background-color: var(--surface);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
}

.form-control:focus, .form-select:focus {
    background-color: var(--surface);
    color: var(--text-primary);
    border-color: var(--primary);
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.2);
}

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

/* Glassmorphism Utilities */
.glass-panel {
    background: var(--glass-bg) !important;
    backdrop-filter: blur(var(--glass-blur)) !important;
    -webkit-backdrop-filter: blur(var(--glass-blur)) !important;
    border: 1px solid var(--glass-border) !important;
}

.glass-card {
    background: var(--surface);
    border-radius: var(--radius-lg);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
    transition: transform 0.3s cubic-bezier(0.25, 0.8, 0.25, 1), box-shadow 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    overflow: hidden;
}

.glass-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-md);
}

/* Premium Buttons */
.btn {
    border-radius: var(--radius-pill);
    font-weight: 600;
    padding: 12px 28px;
    transition: all 0.3s cubic-bezier(0.25, 0.8, 0.25, 1);
    border: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary), #005bb5);
    color: #fff;
    box-shadow: 0 4px 15px rgba(0, 122, 255, 0.4);
}

.btn-primary:hover, .btn-primary:active, .btn-primary:focus {
    background: linear-gradient(135deg, #005bb5, #004494);
    transform: translateY(-2px) scale(1.02);
    box-shadow: 0 8px 25px rgba(0, 122, 255, 0.5);
    color: #fff;
}

.btn-outline-primary {
    background: transparent;
    border: 2px solid var(--primary);
    color: var(--primary);
}

.btn-outline-primary:hover {
    background: var(--primary);
    color: #fff;
}

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

.btn-secondary:hover {
    background: var(--border-color);
}

/* Spinner Overlay */
#spinner {
    opacity: 0;
    visibility: hidden;
    transition: opacity .5s ease-out, visibility 0s linear .5s;
    z-index: 99999;
    background: var(--light) !important;
}
#spinner.show {
    transition: opacity .5s ease-out, visibility 0s linear 0s;
    visibility: visible;
    opacity: 1;
}

/* Navigation Overrides */
.navbar {
    transition: all 0.4s ease;
    background: transparent !important;
}
.navbar.sticky-top {
    background: var(--glass-bg) !important;
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-bottom: 1px solid var(--border-color);
    box-shadow: var(--shadow-sm);
}

.navbar-brand h1 {
    color: var(--text-primary) !important;
}

.navbar-light .navbar-nav .nav-link {
    font-weight: 600;
    color: var(--text-secondary);
    padding: 10px 15px;
    margin: 0 5px;
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
}

.navbar-light .navbar-nav .nav-link:hover,
.navbar-light .navbar-nav .nav-link.active {
    color: var(--primary);
    background: rgba(0, 122, 255, 0.1);
}

/* Mobile Bottom Navigation */
.mobile-bottom-nav {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background: var(--glass-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border-top: 1px solid var(--border-color);
    z-index: 1050;
    padding: 10px 15px;
    padding-bottom: calc(10px + env(safe-area-inset-bottom));
    box-shadow: 0 -4px 20px rgba(0,0,0,0.05);
}

.mobile-bottom-nav-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-item-bottom {
    display: flex;
    flex-direction: column;
    align-items: center;
    color: var(--text-secondary);
    font-size: 0.75rem;
    font-weight: 500;
    text-decoration: none;
    gap: 4px;
    transition: color 0.2s ease;
}

.nav-item-bottom i {
    font-size: 1.2rem;
}

.nav-item-bottom:hover,
.nav-item-bottom.active {
    color: var(--primary);
}

.nav-item-bottom.cta {
    background: var(--primary);
    color: #fff;
    padding: 10px 20px;
    border-radius: var(--radius-pill);
    flex-direction: row;
    box-shadow: 0 4px 10px rgba(0, 122, 255, 0.4);
}

/* Global Content Styling */
.section-title h5 {
    color: var(--primary);
    font-weight: 700;
    letter-spacing: 1px;
    text-transform: uppercase;
    font-size: 0.9rem;
}

.page-header {
    background: linear-gradient(135deg, var(--primary), var(--primary-dark));
    padding: 120px 0 60px 0;
    margin-bottom: 60px;
    text-align: center;
}
.page-header h1 {
    color: #fff;
    font-size: 3.5rem;
}
.page-header .breadcrumb {
    justify-content: center;
    background: rgba(255,255,255,0.1);
    padding: 10px 20px;
    border-radius: var(--radius-pill);
    display: inline-flex;
}
.page-header .breadcrumb-item, .page-header .breadcrumb-item a {
    color: rgba(255,255,255,0.8);
}
.page-header .breadcrumb-item.active {
    color: #fff;
}
.page-header .breadcrumb-item + .breadcrumb-item::before {
    color: rgba(255,255,255,0.5);
}

/* Footer Modernization */
footer {
    background: var(--surface) !important;
    border-top: 1px solid var(--border-color);
}
footer h3 {
    color: var(--text-primary) !important;
}
footer a, footer p {
    color: var(--text-secondary) !important;
}
footer a:hover {
    color: var(--primary) !important;
}

/* Media Queries */
@media (max-width: 991.98px) {
    /* Hide regular topbar/navbar features on mobile if desired */
    .mobile-bottom-nav {
        display: block;
    }
    .mobile-bottom-nav .nav-item-bottom {
        padding: 5px;
    }
}

/* Global Red / Highlight Overrides for Premium Aesthetic */
::selection {
    background-color: var(--primary) !important;
    color: white !important;
}

::-moz-selection {
    background-color: var(--primary) !important;
    color: white !important;
}

mark, .mark {
    background-color: rgba(0, 122, 255, 0.1) !important;
    color: var(--primary) !important;
    padding: 0.2em 0.4em;
    border-radius: var(--radius-sm);
}

/* Change harsh red validation/danger colors to a premium warm amber */
.text-danger, .text-red-500, .text-red-600 {
    color: #FF9500 !important; /* Apple Warm Orange/Amber */
}

.bg-danger, .bg-red-500, .bg-red-600 {
    background-color: #FF9500 !important;
    color: white !important;
}

.alert-danger {
    background-color: rgba(255, 149, 0, 0.1) !important;
    border-color: rgba(255, 149, 0, 0.2) !important;
    color: #cc7700 !important;
}

.border-danger {
    border-color: #FF9500 !important;
}
/* Mobile Responsiveness Fixes */
@media (max-width: 991.98px) {
    body {
        padding-bottom: 70px; /* Space for bottom nav */
    }
    
    .navbar .btn-primary {
        display: none !important; /* Hide appointment button in top nav to save space */
    }
    
    .navbar-collapse {
        background: var(--surface);
        padding: 20px;
        border-radius: var(--radius-md);
        box-shadow: var(--shadow-lg);
        border: 1px solid var(--border-color);
        margin-top: 15px;
    }

    /* Typography scale down */
    .display-1 { font-size: 2.5rem !important; }
    .display-2 { font-size: 2.25rem !important; }
    .display-3 { font-size: 2rem !important; }
    .display-4 { font-size: 1.75rem !important; }
    .display-5 { font-size: 1.5rem !important; }
    .page-header h1 { font-size: 2.5rem !important; }

    /* Padding adjustments */
    .py-5 { padding-top: 2rem !important; padding-bottom: 2rem !important; }
    .p-5 { padding: 2rem !important; }
    .page-header { padding: 80px 0 40px 0 !important; margin-bottom: 30px !important; }
    
    /* Contact sections padding fix */
    .container-fluid.py-5 { padding-top: 2rem !important; padding-bottom: 2rem !important; }
}

@media (max-width: 575.98px) {
    /* Even smaller adjustments for phones */
    .display-1 { font-size: 2.2rem !important; }
    .display-3 { font-size: 1.8rem !important; }
    .page-header h1 { font-size: 2rem !important; }
    
    .hero-header { padding: 40px 0 !important; margin-bottom: 20px !important; }
}