/* ================================
   Custom Styles for DataViz Pro
==================================*/

/* Default Light Theme */
body {
    background-color: #f8f9fa;
    color: #212529;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    transition: all 0.3s ease-in-out;
}

/* ===== Updated Navbar with Gradient Background ===== */
.navbar {
    background: linear-gradient(45deg, #4a90e2, #007bff, #00c6ff);
    border: none;
    box-shadow: 0 4px 15px rgba(0,123,255,0.3);
    transition: background 0.5s ease;
}

.navbar-brand {
    font-weight: 700;
    letter-spacing: 1px;
    color: #fff !important;
    text-shadow: 1px 1px 3px rgba(0, 0, 0, 0.5);
    transition: color 0.3s ease;
}

.navbar-brand:hover {
    color: #d0ebff !important;
    text-shadow: 2px 2px 6px rgba(0, 0, 0, 0.7);
}

/* ===== Styled Nav Links ===== */
.nav-link {
    color: #e0eaff !important;
    font-weight: 600;
    margin: 0 8px;
    padding: 6px 10px;
    border-radius: 6px;
    transition: background-color 0.3s ease, color 0.3s ease, box-shadow 0.3s ease;
}

.nav-link:hover,
.nav-link:focus {
    color: #fff !important;
    background-color: rgba(255, 255, 255, 0.25);
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.7);
    text-decoration: none;
}

/* ===== Navbar Toggler Button (Mobile) ===== */
.navbar-toggler {
    border-color: rgba(255, 255, 255, 0.7);
}

.navbar-toggler-icon {
    filter: invert(1);
}

/* Card and other styles unchanged */
.card {
    border: none;
    border-radius: 0.75rem;
    transition: transform 0.3s ease-in-out;
}

.card:hover {
    transform: translateY(-3px);
}

.card-header {
    border-radius: 0.75rem 0.75rem 0 0 !important;
    font-weight: 600;
}

.card-header.bg-primary {
    background-color: #007bff !important;
}

.card-header.bg-secondary {
    background-color: #6c757d !important;
}

h1, h2 {
    font-weight: 700;
    color: #343a40;
}

.table {
    font-size: 0.9rem;
}

.table th, .table td {
    white-space: nowrap;
}

.footer {
    background-color: #e9ecef !important;
    border-top: 1px solid #dee2e6;
}

/* Plot Images */
.img-fluid {
    max-width: 100%;
    height: auto;
    display: block;
    margin: 0 auto;
}

/* Form Select Width Fix */
.form-select.w-auto {
    width: auto !important;
    min-width: 150px;
}

/* Cards Responsive Layout */
.card-body .d-flex {
    flex-wrap: wrap;
    gap: 10px;
}

/* Center Plotly Charts */
.card-body .js-plotly-plot {
    margin: 0 auto !important;
}

/* ================================
        DARK MODE STYLES
==================================*/

.dark-mode {
    background-color: #121212 !important;
    color: #eaeaea !important;
}

.dark-mode .navbar {
    background: linear-gradient(45deg, #2c3e50, #3498db);
    border-bottom: 1px solid #333;
    box-shadow: none;
}

.dark-mode .navbar-brand,
.dark-mode .nav-link {
    color: #eaeaea !important;
}

.dark-mode .nav-link:hover,
.dark-mode .nav-link:focus {
    background-color: rgba(255, 255, 255, 0.15);
    color: #fff !important;
    box-shadow: 0 0 8px rgba(255, 255, 255, 0.6);
    text-decoration: none;
}

.dark-mode .card {
    background-color: #1e1e1e;
    color: #eaeaea;
}

.dark-mode .card-header {
    background-color: #2c2c2c !important;
    color: #fff;
}

.dark-mode .table {
    color: #fff;
}

.dark-mode .table th,
.dark-mode .table td {
    border-color: #444;
}

.dark-mode .footer {
    background-color: #1e1e1e !important;
    color: #ccc;
}

.dark-mode .btn-outline-secondary {
    color: #eaeaea;
    border-color: #aaa;
}

.dark-mode .btn-outline-secondary:hover {
    background-color: #eaeaea;
    color: #000;
}

/* Home Page Start Analysis Button */
.start-btn {
    font-size: 1.3rem;
    font-weight: 600;
    border-radius: 8px;
    transition: all 0.25s ease-in-out;
    box-shadow: 0 4px 14px rgba(0,0,0,0.15);
    animation: pulseAnim 2s infinite ease-in-out;
}

.start-btn:hover {
    transform: scale(1.07);
    box-shadow: 0 6px 20px rgba(0,0,0,0.25);
}

/* Button Pulse Animation */
@keyframes pulseAnim {
    0%   { transform: scale(1); }
    50%  { transform: scale(1.06); }
    100% { transform: scale(1); }
}