/* MODERN DESIGN SYSTEM - HIGH CONTRAST UPDATE */
:root {
    /* Brand Colors */
    --primary-accent: #60a5fa;
    /* Lighter blue for better contrast on dark */
    --primary-hover: #3b82f6;
    --success-accent: #34d399;
    /* Brighter green */
    --danger-accent: #f87171;
    /* Brighter red */
    --warning-accent: #fbbf24;
    /* Brighter yellow */
    --info-accent: #22d3ee;
    /* Brighter cyan */

    /* Backgrounds & Surfaces */
    --bg-body: #0f172a;
    /* Very dark slate blue/grey */
    --bg-card: #1e293b;
    /* Lighter slate for cards */
    --bg-input: #334155;
    /* Input background */
    --bg-input-focus: #1e293b;

    /* Text Colors - UPDATED FOR READABILITY */
    --text-main: #ffffff;
    /* Pure white */
    --text-muted: #cbd5e1;
    /* Very light grey (was dark grey) */
    --text-placeholder: #94a3b8;
    /* Visible placeholder */

    /* Borders & Shadows */
    --border-subtle: rgba(255, 255, 255, 0.15);
    /* Slightly stronger border */
    --border-focus: rgba(96, 165, 250, 0.6);
    --shadow-soft: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -2px rgba(0, 0, 0, 0.3);

    /* Spacing & Radius */
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-body);
    background-image: radial-gradient(circle at top right, #1e293b 0%, transparent 40%), radial-gradient(circle at bottom left, #172033 0%, transparent 40%);
    color: var(--text-main);
    min-height: 100vh;
    padding-bottom: 40px;
}

/* Override Bootstrap utilities for dark mode consistency */
.text-muted {
    color: var(--text-muted) !important;
}

.small,
small {
    font-size: 0.875rem;
}

/* --- Card Styling --- */
.container {
    max-width: 800px;
    /* Optimal reading width */
}

.card {
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-xl);
    background-color: var(--bg-card);
    box-shadow: var(--shadow-soft);
    backdrop-filter: blur(10px);
}

.card-body {
    padding: 2rem;
}

@media (min-width: 768px) {
    .card-body {
        padding: 3rem;
    }
}

.card-title {
    color: var(--text-main);
    font-weight: 700;
    letter-spacing: -0.5px;
    margin-bottom: 0.5rem;
}

/* --- Forms & Inputs --- */
.form-label {
    font-size: 0.95rem;
    font-weight: 600;
    /* Bolder */
    color: var(--text-main);
    /* White instead of muted */
    margin-bottom: 0.5rem;
    display: block;
    letter-spacing: 0.5px;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.5);
}

.form-control,
.form-select {
    background-color: var(--bg-body);
    /* Darker than card background for inset effect */
    border: 1px solid rgba(255, 255, 255, 0.2);
    /* Visible border */
    color: var(--text-main);
    border-radius: var(--radius-md);
    padding: 0.85rem 1rem;
    font-size: 1rem;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.3);
    /* Inner shadow for depth */
}

.form-control::placeholder {
    color: rgba(255, 255, 255, 0.4);
    font-style: italic;
}

.form-control:focus,
.form-select:focus {
    background-color: #1e293b;
    /* Slightly lighter on focus */
    color: var(--text-main);
    border-color: var(--primary-accent);
    box-shadow: 0 0 0 3px rgba(96, 165, 250, 0.3), inset 0 1px 2px rgba(0, 0, 0, 0.3);
    outline: none;
}

/* Ensure dropdowns have good contrast and pop out */
.form-select {
    background-color: #475569;
    /* Much lighter background (Slate 600) to really stand out */
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23ffffff' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
    border-color: rgba(255, 255, 255, 0.4);
}

.form-select:hover {
    background-color: #475569;
    /* Even lighter on hover */
    cursor: pointer;
}

/* Remove number spinner arrows */
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;
}

/* --- Radio Buttons --- */
.form-check {
    margin-right: 1.5rem;
    padding-left: 1.8rem;
    display: inline-flex;
    align-items: center;
}

.form-check-input {
    background-color: var(--bg-body);
    border: 1px solid rgba(255, 255, 255, 0.4);
    width: 1.3em;
    height: 1.3em;
    margin-top: 0;
    margin-right: 0.5em;
    cursor: pointer;
    box-shadow: inset 0 1px 3px rgba(0, 0, 0, 0.4);
}

.form-check-input:checked {
    background-color: var(--primary-accent);
    border-color: var(--primary-accent);
    box-shadow: 0 0 10px rgba(96, 165, 250, 0.5);
    /* Glowing check */
}

.form-check-label {
    cursor: pointer;
    font-weight: 500;
    color: var(--text-main);
}

/* --- Accordions --- */
.accordion-item {
    background-color: transparent;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-md) !important;
    margin-bottom: 1rem;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
}

.accordion-button {
    background-color: #334155;
    /* Lighter slate [Slate 700] */
    color: var(--text-main);
    font-weight: 700;
    /* Bolder text */
    padding: 1.25rem;
    box-shadow: none !important;
    border-left: 5px solid var(--primary-accent);
    /* Strong accent */
    transition: all 0.3s ease;
    text-transform: uppercase;
    /* Make it more like a section header */
    letter-spacing: 1px;
    font-size: 0.95rem;
}

.accordion-button:not(.collapsed) {
    background-color: #1e293b;
    /* Darker when open to focus content */
    color: var(--primary-accent);
    box-shadow: inset 0 -1px 0 rgba(255, 255, 255, 0.1) !important;
}

.accordion-button::after {
    filter: invert(1);
    opacity: 0.8;
    transform: scale(1.2);
    /* Bigger icon */
}

.accordion-button:not(.collapsed)::after {
    filter: invert(1) sepia(1) saturate(5) hue-rotate(175deg);
    /* Blue tint matches primary */
    opacity: 1;
}

.accordion-body {
    background-color: rgba(15, 23, 42, 0.6);
    /* Darker inner body */
    padding: 1.5rem;
    border-top: 1px solid var(--border-subtle);
}

.material-input-group {
    background-color: rgba(255, 255, 255, 0.03);
    border: 1px dashed var(--border-subtle);
    padding: 1.5rem;
    border-radius: var(--radius-md);
    margin-bottom: 1rem;
}

/* --- Buttons --- */
.btn {
    padding: 0.8rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    border: none;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-accent), var(--primary-hover));
    box-shadow: 0 4px 12px rgba(59, 130, 246, 0.4);
    color: #0f172a;
    /* Dark text on bright blue button for readability */
}

.btn-primary:hover {
    box-shadow: 0 6px 16px rgba(59, 130, 246, 0.6);
    transform: translateY(-1px);
    color: #0f172a;
}

.btn-info {
    background-color: rgba(34, 211, 238, 0.2);
    color: var(--info-accent);
    border: 1px solid rgba(34, 211, 238, 0.4);
}

.btn-info:hover {
    background-color: var(--info-accent);
    color: #0f172a;
}

.btn-outline-secondary {
    border: 1px solid var(--border-subtle);
    color: var(--text-muted);
    background: transparent;
}

.btn-outline-secondary:hover {
    background-color: var(--bg-input);
    color: var(--text-main);
    border-color: var(--text-muted);
}

.btn-warning {
    background: linear-gradient(135deg, #fbbf24, #d97706);
    color: #0f172a;
    /* Dark text */
    box-shadow: 0 4px 12px rgba(245, 158, 11, 0.3);
}

.btn-warning:hover {
    filter: brightness(1.1);
}

.btn-success {
    background-color: var(--success-accent);
    color: #064e3b;
    /* Dark green text */
}

.btn-danger {
    background-color: rgba(248, 113, 113, 0.15);
    color: var(--danger-accent);
    border: 1px solid rgba(248, 113, 113, 0.3);
}

.btn-danger:hover {
    background-color: var(--danger-accent);
    color: white;
}

/* --- Preset & History Areas --- */
.preset-buttons {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    margin: 2rem 0;
}

.history {
    margin-top: 4rem;
    border-top: 1px solid var(--border-subtle);
    padding-top: 2rem;
}

.history h3 {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
    color: var(--text-main);
    /* White heading */
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
}

.list-group-item {
    background-color: var(--bg-input);
    border: 1px solid transparent;
    margin-bottom: 0.75rem;
    border-radius: var(--radius-md) !important;
    color: var(--text-main);
    transition: transform 0.2s ease, background-color 0.2s ease;
    padding: 1.25rem;
}

.list-group-item:hover {
    background-color: rgba(255, 255, 255, 0.1);
    transform: translateX(4px);
    border-color: var(--border-subtle);
}

.list-group-item strong {
    color: var(--primary-accent);
    font-size: 1.1rem;
}

.list-group-item small {
    display: block;
    margin-top: 0.25rem;
    color: var(--text-muted);
    /* Ensure history details are readable */
}

/* --- Modals --- */
.modal-content {
    background-color: #1e293b;
    border: 1px solid var(--border-subtle);
    border-radius: var(--radius-lg);
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
}

.modal-header {
    border-bottom: 1px solid var(--border-subtle);
    background-color: transparent;
    padding: 1.5rem;
}

.modal-header .btn-close {
    filter: invert(1);
    opacity: 1;
    /* Maximum visibility */
}

.modal-body {
    color: var(--text-main);
    padding: 2rem;
}

.modal-footer {
    border-top: 1px solid var(--border-subtle);
    background-color: transparent;
    padding: 1.5rem;
}

/* Helpers */
.preset-hinweis {
    font-size: 0.75rem;
    opacity: 0.9;
    /* More visible */
    font-weight: 500;
    border: 1px solid rgba(255, 255, 255, 0.3);
    color: var(--text-muted);
    padding: 2px 8px;
    border-radius: 4px;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-body);
}

::-webkit-scrollbar-thumb {
    background: var(--bg-input);
    border-radius: 5px;
}

::-webkit-scrollbar-thumb:hover {
    background: #475569;
}

/* Mobile specific fixes */
@media (max-width: 576px) {
    .preset-buttons {
        grid-template-columns: 1fr;
        /* Stack buttons */
    }

    .card-body {
        padding: 1.25rem;
    }
}