/* Reset und Grundeinstellungen */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Dark Mode Farbschema */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3a3a3a;
    --text-primary: #ffffff;
    --text-secondary: #b0b0b0;
    --text-muted: #808080;
    --accent-primary: #4a9eff;
    --accent-secondary: #6bb6ff;
    --accent-success: #4caf50;
    --accent-warning: #ff9800;
    --accent-danger: #f44336;
    --border-color: #404040;
    --border-hover: #505050;
    --shadow: rgba(0, 0, 0, 0.3);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    flex: 1;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 30px;
    padding-bottom: 20px;
    border-bottom: 2px solid var(--border-color);
}

header h1 {
    color: var(--accent-primary);
    font-size: 2.2rem;
    font-weight: 600;
}

/* Sections */
section {
    background-color: var(--bg-secondary);
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 25px;
    box-shadow: 0 4px 6px var(--shadow);
    border: 1px solid var(--border-color);
}

section h2 {
    color: var(--accent-secondary);
    font-size: 1.4rem;
    margin-bottom: 20px;
    font-weight: 500;
}

/* Input Groups */
.input-group {
    margin-bottom: 15px;
}

.input-group label {
    display: block;
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 6px;
    font-size: 0.9rem;
}

.input-group input,
.input-group select,
.input-group textarea {
    width: 100%;
    padding: 12px 15px;
    background-color: var(--bg-tertiary);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
}

.input-group input:focus,
.input-group select:focus,
.input-group textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(74, 158, 255, 0.1);
}

.input-group input::placeholder,
.input-group textarea::placeholder {
    color: var(--text-muted);
}

/* Basic Info Layout */
.basic-info {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 20px;
}

@media (max-width: 768px) {
    .basic-info {
        grid-template-columns: 1fr;
    }
}

/* Lernziele */
.learning-objectives {
    position: relative;
}

.objective-item {
    display: flex;
    gap: 12px;
    margin-bottom: 12px;
    align-items: center;
    background-color: var(--bg-tertiary);
    border-radius: 8px;
    padding: 8px;
    border: 1px solid var(--border-color);
    transition: border-color 0.3s ease, transform 0.2s ease;
}

.objective-item:hover {
    border-color: var(--border-hover);
    transform: translateY(-1px);
}

.objective-item:focus-within {
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px rgba(74, 158, 255, 0.1);
}

.objective-input {
    flex: 1;
    border: none !important;
    background: transparent !important;
    padding: 8px 12px !important;
    box-shadow: none !important;
    color: var(--text-primary) !important;
}

.objective-input:focus {
    outline: none;
    box-shadow: none !important;
    border: none !important;
}

.remove-objective {
    background-color: var(--accent-danger);
    color: white;
    border: none;
    border-radius: 6px;
    width: 35px;
    height: 35px;
    cursor: pointer;
    font-size: 1rem;
    transition: background-color 0.3s ease;
}

.remove-objective:hover {
    background-color: #d32f2f;
}

/* Unterrichtsphasen */
.phase-item {
    background-color: var(--bg-tertiary);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
    border: 1px solid var(--border-color);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.phase-item:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 12px var(--shadow);
}

.phase-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
    padding-bottom: 10px;
    border-bottom: 1px solid var(--border-color);
}

.phase-number {
    font-weight: 600;
    color: var(--accent-primary);
    font-size: 1.1rem;
}

.phase-controls {
    display: flex;
    gap: 8px;
}

.phase-controls button {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    width: 32px;
    height: 32px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.phase-controls button:hover {
    background-color: var(--bg-primary);
    border-color: var(--border-hover);
}

.phase-controls .remove-phase {
    background-color: var(--accent-danger);
    border-color: var(--accent-danger);
    color: white;
}

.phase-controls .remove-phase:hover {
    background-color: #d32f2f;
}

/* Input Rows */
.input-row {
    display: grid;
    gap: 15px;
    margin-bottom: 15px;
}

.input-row:first-child {
    grid-template-columns: 1fr 2fr;
}

.input-row:nth-child(2) {
    grid-template-columns: 1fr 2fr;
}

.input-row .full-width {
    grid-column: 1 / -1;
}

@media (max-width: 768px) {
    .input-row {
        grid-template-columns: 1fr !important;
    }
}

.duration {
    max-width: 150px;
}

.time-display {
    display: flex;
    align-items: center;
}

.time-range {
    background-color: var(--bg-secondary);
    padding: 10px 15px;
    border-radius: 6px;
    border: 2px solid var(--border-color);
    color: var(--accent-primary);
    font-weight: 500;
    font-family: monospace;
}

/* Buttons */
.add-btn,
.primary-btn,
.secondary-btn {
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.3s ease;
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

.add-btn {
    background-color: var(--accent-success);
    color: white;
    margin-top: 10px;
}

.add-btn:hover {
    background-color: #45a049;
    transform: translateY(-1px);
}

.primary-btn {
    background-color: var(--accent-primary);
    color: white;
    font-size: 1.1rem;
    padding: 15px 25px;
}

.primary-btn:hover {
    background-color: var(--accent-secondary);
    transform: translateY(-1px);
    box-shadow: 0 4px 8px var(--shadow);
}

.secondary-btn {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

.secondary-btn:hover {
    background-color: var(--bg-secondary);
    border-color: var(--border-hover);
    transform: translateY(-1px);
}

/* Action Buttons */
.actions {
    text-align: center;
}

.action-buttons {
    display: flex;
    gap: 15px;
    justify-content: center;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .action-buttons {
        flex-direction: column;
        align-items: center;
    }
    
    .action-buttons button {
        width: 100%;
        max-width: 300px;
    }
}

/* Responsive Design */
@media (max-width: 1024px) {
    .container {
        padding: 15px;
    }
    
    section {
        padding: 20px;
    }
}

@media (max-width: 480px) {
    header h1 {
        font-size: 1.8rem;
    }
    
    .container {
        padding: 10px;
    }
    
    section {
        padding: 15px;
    }
    
    .phase-item {
        padding: 15px;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-hover);
}

/* Loading State */
.loading {
    opacity: 0.6;
    pointer-events: none;
}

/* Success/Error Messages */
.message {
    padding: 12px 15px;
    border-radius: 6px;
    margin-bottom: 15px;
    font-weight: 500;
}

.message.success {
    background-color: rgba(76, 175, 80, 0.1);
    border: 1px solid var(--accent-success);
    color: var(--accent-success);
}

.message.error {
    background-color: rgba(244, 67, 54, 0.1);
    border: 1px solid var(--accent-danger);
    color: var(--accent-danger);
}

/* Animation für neue Elemente */
@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.phase-item.new {
    animation: slideIn 0.3s ease;
}

.objective-item.new {
    animation: slideIn 0.3s ease;
}

/* Layout für Zeit und KI-Button */
.time-and-ai {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.time-input-group {
    flex: 0 0 auto;
}

/* KI-Prompt Button Styles */
.ai-btn {
    background: linear-gradient(135deg, var(--accent-color), #9d4edd);
    color: white;
    border: none;
    padding: 12px 20px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 14px;
    display: flex;
    align-items: center;
    gap: 8px;
    white-space: nowrap;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.ai-btn:hover {
    background: linear-gradient(135deg, #9d4edd, var(--accent-color));
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
}

.ai-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 1000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
}

.modal-content {
    background-color: var(--card-bg);
    margin: 5% auto;
    padding: 0;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    width: 90%;
    max-width: 800px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    animation: modalSlideIn 0.3s ease-out;
}

@keyframes modalSlideIn {
    from {
        opacity: 0;
        transform: translateY(-50px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 25px;
    border-bottom: 1px solid var(--border-color);
    background: linear-gradient(135deg, var(--card-bg), rgba(139, 69, 255, 0.1));
}

.modal-header h2 {
    margin: 0;
    color: var(--text-color);
    font-size: 1.5rem;
}

.close {
    color: var(--text-secondary);
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    transition: color 0.2s ease;
    line-height: 1;
}

.close:hover {
    color: var(--accent-color);
}

.modal-body {
    padding: 25px;
}

.modal-body p {
    margin-bottom: 15px;
    color: var(--text-color);
    font-weight: 500;
}

#ai-prompt-text {
    width: 100%;
    height: 400px;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 15px;
    font-family: 'Courier New', monospace;
    font-size: 13px;
    color: #ffffff;
    resize: vertical;
    line-height: 1.4;
    margin-bottom: 20px;
}

#ai-prompt-text:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(139, 69, 255, 0.2);
}

.modal-actions {
    display: flex;
    gap: 12px;
    justify-content: flex-end;
    flex-wrap: wrap;
}

.primary-btn, .secondary-btn {
    padding: 12px 24px;
    border-radius: 8px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
    font-size: 14px;
}

.primary-btn {
    background: linear-gradient(135deg, var(--accent-color), #9d4edd);
    color: white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.primary-btn:hover {
    background: linear-gradient(135deg, #9d4edd, var(--accent-color));
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.4);
}

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

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

/* Responsive Modal */
@media (max-width: 768px) {
    .modal-content {
        margin: 10px;
        width: calc(100% - 20px);
        max-height: 90vh;
    }
    
    .modal-header {
        padding: 15px 20px;
    }
    
    .modal-header h2 {
        font-size: 1.3rem;
    }
    
    .modal-body {
        padding: 20px;
    }
    
    #ai-prompt-text {
        height: 300px;
        font-size: 12px;
    }
    
    .modal-actions {
        justify-content: stretch;
    }
    
    .primary-btn, .secondary-btn {
        flex: 1;
        text-align: center;
    }
    
    .time-and-ai {
        flex-direction: column;
        align-items: stretch;
        gap: 10px;
    }
    
    .ai-btn {
        justify-content: center;
    }
}

/* Footer Styles */
footer {
    margin-top: auto;
    padding: 30px 0;
    border-top: 2px solid var(--border-color);
    background-color: var(--bg-secondary);
}

.impressum {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    text-align: center;
}

.impressum p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.8;
}

.impressum a {
    color: var(--accent-primary);
    text-decoration: none;
    margin: 0 8px;
    transition: color 0.3s ease;
}

.impressum a:hover {
    color: var(--accent-secondary);
    text-decoration: underline;
}

.impressum a:first-of-type::before {
    content: "";
    margin-right: 8px;
}

.impressum a:not(:last-of-type)::after {
    content: " |";
    color: var(--text-muted);
    margin-left: 8px;
}

/* Responsive footer */
@media (max-width: 768px) {
    footer {
        margin-top: auto;
        padding: 20px 0;
    }
    
    .impressum p {
        font-size: 0.8rem;
        line-height: 1.6;
    }
    
    .impressum a {
        margin: 0 4px;
        display: inline-block;
    }
    
    .impressum a:not(:last-of-type)::after {
        margin-left: 4px;
    }
}