:root {
    /* Colors - Light Theme */
    --bg-color: #f5f7fa;
    --card-bg: #ffffff;
    --text-main: #2d3748;
    --text-muted: #718096;
    --border-color: #e2e8f0;
    
    --primary: #4299e1;
    --primary-hover: #3182ce;
    
    /* Difficulty Colors */
    --diff-leicht: #48bb78; /* Green */
    --diff-mittel: #4299e1; /* Blue */
    --diff-schwer: #ed8936; /* Orange */
    
    --diff-leicht-bg: #f0fff4;
    --diff-mittel-bg: #ebf8ff;
    --diff-schwer-bg: #fffaf0;

    --radius: 12px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-hover: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --transition: all 0.2s ease-in-out;
}

@media (prefers-color-scheme: dark) {
    :root {
        /* Colors - Dark Theme */
        --bg-color: #1a202c;
        --card-bg: #2d3748;
        --text-main: #f7fafc;
        --text-muted: #a0aec0;
        --border-color: #4a5568;
        
        --primary: #63b3ed;
        --primary-hover: #4299e1;

        --diff-leicht-bg: rgba(72, 187, 120, 0.15);
        --diff-mittel-bg: rgba(66, 153, 225, 0.15);
        --diff-schwer-bg: rgba(237, 137, 54, 0.15);
    }
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-tap-highlight-color: transparent;
}

/* Typography */
h1, h2, h3 {
    font-weight: 600;
}

/* Layout */
header {
    background-color: var(--card-bg);
    padding: 1rem;
    box-shadow: var(--shadow);
    position: sticky;
    top: 0;
    z-index: 10;
}

header h1 {
    font-size: 1.25rem;
    text-align: center;
    margin-bottom: 1rem;
    font-weight: 800;
}

nav {
    display: flex;
    justify-content: space-around;
    gap: 0.5rem;
}

nav button {
    flex: 1;
    background: none;
    border: none;
    padding: 0.5rem;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-muted);
    border-bottom: 2px solid transparent;
    cursor: pointer;
    transition: var(--transition);
}

nav button.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
}

main {
    padding: 1rem;
    max-width: 600px;
    margin: 0 auto;
    padding-bottom: 3rem;
}

.view {
    display: none;
    animation: fadeIn 0.3s ease;
}

.view.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

/* Cards */
.config-card, .settings-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 1.25rem;
    box-shadow: var(--shadow);
    margin-bottom: 1.5rem;
}

/* Input Rows */
.config-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--border-color);
}
.config-row:last-child {
    border-bottom: none;
}

/* Badges */
.badge {
    padding: 0.25rem 0.75rem;
    border-radius: 9999px;
    font-weight: 600;
    font-size: 0.85rem;
}

.badge.leicht, .text-leicht { color: var(--diff-leicht); }
.badge.mittel, .text-mittel { color: var(--diff-mittel); }
.badge.schwer, .text-schwer { color: var(--diff-schwer); }

.bg-leicht { background-color: var(--diff-leicht-bg); border-left: 4px solid var(--diff-leicht); }
.bg-mittel { background-color: var(--diff-mittel-bg); border-left: 4px solid var(--diff-mittel); }
.bg-schwer { background-color: var(--diff-schwer-bg); border-left: 4px solid var(--diff-schwer); }

/* Number Input Box */
.number-input {
    display: flex;
    align-items: center;
    background: var(--bg-color);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.number-input button {
    background: none;
    border: none;
    width: 36px;
    height: 36px;
    font-size: 1.25rem;
    color: var(--text-main);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

.number-input button:active {
    background-color: var(--border-color);
}

.number-input input {
    width: 40px;
    text-align: center;
    border: none;
    background: transparent;
    color: var(--text-main);
    font-weight: 600;
    -moz-appearance: textfield;
}

/* Buttons */
.primary-btn, .secondary-btn, .danger-btn {
    display: block;
    width: 100%;
    padding: 0.875rem;
    border-radius: var(--radius);
    border: none;
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    text-align: center;
    transition: var(--transition);
    margin-top: 1rem;
}

.primary-btn {
    background-color: var(--primary);
    color: white;
}

.primary-btn:active {
    background-color: var(--primary-hover);
    transform: scale(0.98);
}

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

.danger-btn {
    background-color: #fed7d7;
    color: #c53030;
}

.primary-btn.small {
    width: auto;
    padding: 0.5rem 1rem;
    margin: 0;
}

/* Generator Results */
.hidden { display: none !important; }

.results-grid {
    display: grid;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.result-card {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 1rem;
    box-shadow: var(--shadow);
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    animation: shuffleIn 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

@keyframes shuffleIn {
    0% { transform: scale(0.8) rotate(-5deg); opacity: 0; }
    100% { transform: scale(1) rotate(0); opacity: 1; }
}

.result-info h3 {
    margin-bottom: 0.25rem;
}

.result-desc {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.25rem;
}

.tag {
    font-size: 0.75rem;
    background: var(--bg-color);
    padding: 0.1rem 0.4rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.btn-reroll-single {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    padding: 0.5rem;
    margin: -0.5rem;
    border-radius: 50%;
    color: var(--text-muted);
}

.btn-reroll-single:active {
    background: var(--bg-color);
    transform: rotate(180deg);
    transition: transform 0.3s;
}

/* Manage View */
.manage-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
}

.filter-bar {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.filter-bar select, .filter-bar input {
    padding: 0.5rem;
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    background: var(--card-bg);
    color: var(--text-main);
    font-family: inherit;
    width: 100%;
}

.stats-bar {
    display: flex;
    gap: 1rem;
    font-size: 0.85rem;
    font-weight: 600;
    margin-bottom: 1rem;
    justify-content: space-between;
}

.manage-item {
    background: var(--card-bg);
    border-radius: var(--radius);
    padding: 1rem;
    margin-bottom: 0.75rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: var(--shadow);
}

.manage-item-actions button {
    background: none;
    border: none;
    margin-left: 0.5rem;
    cursor: pointer;
    font-size: 1.1rem;
    padding: 0.25rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    z-index: 100;
    align-items: center;
    justify-content: center;
    padding: 1rem;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--card-bg);
    width: 100%;
    max-width: 400px;
    border-radius: var(--radius);
    padding: 1.5rem;
    box-shadow: 0 20px 25px -5px rgba(0,0,0,0.1);
}

.form-group {
    margin-bottom: 1rem;
}

.form-group label {
    display: block;
    margin-bottom: 0.25rem;
    font-size: 0.875rem;
    font-weight: 600;
}

.form-group input, .form-group select, .form-group textarea {
    width: 100%;
    padding: 0.75rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    background: var(--bg-color);
    color: var(--text-main);
    font-family: inherit;
}

.modal-actions {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

/* Toast */
#toast-container {
    position: fixed;
    bottom: 1rem;
    left: 1rem;
    right: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    z-index: 1000;
    pointer-events: none;
}

.toast {
    background: #323232;
    color: white;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    text-align: center;
    box-shadow: var(--shadow);
    animation: slideUp 0.3s ease, fadeOut 0.3s ease 2.7s forwards;
}

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

/* File Upload hidden config */
.file-upload input[type="file"] {
    display: none;
}
.file-upload label {
    margin-top: 1rem;
}