:root {
    --primary-color: #004d40;
    --primary-gradient: linear-gradient(135deg, #004d40, #00796b);
    --bg-light: #f8f9fa;
    --bg-dark: #121212;
    --card-bg-dark: #1e1e1e;
    --text-dark: #e0e0e0;
}

body {
    font-family: 'Inter', 'Noto Serif Bengali', sans-serif;
    transition: background-color 0.3s, color 0.3s;
    background-color: var(--bg-light);
}

body[data-bs-theme='dark'] {
    background-color: var(--bg-dark);
    color: var(--text-dark);
}

.content-wrapper {
    padding-bottom: 80px !important; /* Mobile nav space */
}

@media (min-width: 1200px) {
    .content-wrapper {
        padding-bottom: 24px !important;
    }
}

/* Card Styling */
.card {
    border: none;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.05);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    overflow: hidden;
}

body[data-bs-theme='dark'] .card {
    background-color: var(--card-bg-dark);
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.1);
}

.card-header-gradient {
    background: var(--primary-gradient);
    color: white;
    border-bottom: none;
    padding: 1.25rem 1.5rem;
}

/* Forms */
.form-control, .form-select {
    border-radius: 12px;
    padding: 0.75rem 1rem;
    border: 1px solid #dee2e6;
    background-color: #fff;
    transition: border-color 0.15s ease-in-out, box-shadow 0.15s ease-in-out;
}

.form-control:focus, .form-select:focus {
    border-color: #004d40;
    box-shadow: 0 0 0 0.25rem rgba(0, 77, 64, 0.25);
}

body[data-bs-theme='dark'] .form-control,
body[data-bs-theme='dark'] .form-select {
    background-color: #2d2d2d;
    border-color: #444;
    color: #e0e0e0;
}

/* Buttons */
.btn {
    border-radius: 12px;
    padding: 0.6rem 1.25rem;
    font-weight: 600;
}

.btn-primary, .btn-success {
    background: var(--primary-gradient);
    border: none;
}

.btn-primary:hover, .btn-success:hover {
    background: linear-gradient(135deg, #00332a, #004d40);
}

/* Results Box */
.result-box {
    display: none;
    animation: slideUp 0.4s ease-out forwards;
    border-radius: 16px;
    background-color: #f1f8f6;
    border: 1px solid #c8e6c9;
}

body[data-bs-theme='dark'] .result-box {
    background-color: #1a2c26;
    border-color: #2e4a3d;
}

.result-card-inner {
    background: white;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0,0,0,0.05);
}

body[data-bs-theme='dark'] .result-card-inner {
    background: #252525;
}

@keyframes slideUp {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Utility */
.fs-7 { font-size: 0.85rem; }
.fw-semibold { font-weight: 600; }

/* Sidebar */
.sidebar-nav .nav-link {
    border-radius: 10px;
    padding: 0.75rem 1rem;
    transition: all 0.2s ease;
}
.sidebar-nav .nav-link:hover:not(.active) {
    background-color: rgba(0,0,0,0.05);
}
body[data-bs-theme='dark'] .sidebar-nav .nav-link:hover:not(.active) {
    background-color: rgba(255,255,255,0.05);
}
.sidebar-nav .active {
    background: var(--primary-gradient) !important;
    color: white !important;
    box-shadow: 0 4px 10px rgba(0, 77, 64, 0.3);
}

/* Mobile Nav */
.mobile-bottom-nav a {
    text-decoration: none;
    transition: color 0.2s;
}
body[data-bs-theme='dark'] .mobile-bottom-nav {
    background-color: #1e1e1e !important;
    border-top-color: #333 !important;
}

/* Hide scrollbar for inputs */
input[type=number]::-webkit-inner-spin-button,
input[type=number]::-webkit-outer-spin-button {
  -webkit-appearance: none;
  margin: 0;
}
input[type=number] {
  -moz-appearance: textfield;
}