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

:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --accent-primary: #238636;
    --accent-secondary: #1f6feb;
    --accent-danger: #da3633;
    --accent-warning: #fb8500;
    --border-color: #30363d;
    --hover-bg: #30363d;
    --shadow: 0 16px 32px rgba(1, 4, 9, 0.85);
}

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

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 20px;
    padding: 15px 0;
}

header h1 {
    font-size: 1.8rem;
    font-weight: 700;
    background: linear-gradient(45deg, var(--accent-primary), var(--accent-secondary));
    background-clip: text;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 10px;
}

header p {
    font-size: 1.2rem;
    color: var(--text-secondary);
}

.main-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    grid-template-rows: auto auto;
    gap: 30px;
}

.visualization-card {
    grid-column: 1 / -1;
}

.card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    box-shadow: var(--shadow);
    transition: all 0.3s ease;
}

.card:hover {
    transform: translateY(-2px);
    box-shadow: 0 20px 40px rgba(1, 4, 9, 0.9);
}

.card h2 {
    font-size: 1.8rem;
    margin-bottom: 20px;
    color: var(--text-primary);
}

.card h3 {
    font-size: 1.4rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

/* Input Groups */
.file-input-group {
    display: flex;
    flex-direction: column;
    gap: 16px;
    margin-bottom: 20px;
}

.file-type-selection {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 12px;
}

.file-type-btn {
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
}

.file-type-btn:hover {
    border-color: var(--accent-primary);
    background: var(--hover-bg);
    transform: translateY(-1px);
}

.file-type-btn.active {
    border-color: var(--accent-primary);
    background: var(--accent-primary);
    color: white;
}

/* Media Type Selection */
.media-type-selection {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.media-type-btn {
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    text-align: center;
    min-height: 80px;
    max-height: 80px;
    width: 100%;
    overflow: hidden;
}

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

.media-type-btn.active {
    border-color: var(--accent-secondary);
    background: var(--accent-secondary);
    color: white;
}

.media-btn-img {
    width: 32px !important;
    height: 32px !important;
    max-width: 32px !important;
    max-height: 32px !important;
    object-fit: contain;
    flex-shrink: 0;
    display: block;
    background: transparent !important;
    border: none !important;
}

/* Fix all media-related images */
.media-image, .media-icon, .media-bar-icon {
    background: transparent !important;
    border: none !important;
    object-fit: contain;
}

.media-image {
    max-width: 80px !important;
    max-height: 80px !important;
}

.media-icon {
    width: 24px !important;
    height: 24px !important;
}

.media-bar-icon {
    width: 20px !important;
    height: 20px !important;
}

.size-input-row {
    display: flex;
    gap: 12px;
    align-items: center;
}

.size-input-row input,
.size-input-row select,
.size-input-row button {
    flex: 1;
    min-width: 120px;
}

.media-input-group {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-bottom: 20px;
    align-items: center;
}

.custom-inputs {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

input,
select,
button {
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: var(--bg-tertiary);
    color: var(--text-primary);
    font-size: 14px;
    transition: all 0.2s ease;
}

input:focus,
select:focus {
    outline: none;
    border-color: var(--accent-secondary);
    box-shadow: 0 0 0 3px rgba(31, 111, 235, 0.1);
}

button {
    background: var(--accent-primary);
    color: white;
    border: none;
    cursor: pointer;
    font-weight: 500;
    min-width: 120px;
}

button:hover {
    background: #2ea043;
    transform: translateY(-1px);
}

button:active {
    transform: translateY(0);
}

button.danger {
    background: var(--accent-danger);
}

button.danger:hover {
    background: #e5534b;
}

/* File and Media Lists */
.file-list,
.media-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.file-item,
.media-item {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s ease;
}

.file-item:hover,
.media-item:hover {
    background: var(--hover-bg);
    transform: translateX(4px);
}

.file-info,
.media-info {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.file-name,
.media-name {
    font-weight: 600;
    color: var(--text-primary);
}

.file-size,
.media-size {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.file-type {
    display: inline-block;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    font-weight: 500;
    margin-top: 4px;
}

.file-type.text { background: var(--accent-secondary); color: white; }
.file-type.image { background: var(--accent-warning); color: white; }
.file-type.music { background: #8b5cf6; color: white; }
.file-type.video { background: var(--accent-danger); color: white; }

.remove-btn {
    padding: 6px 12px;
    font-size: 12px;
    min-width: auto;
}

/* Visualization */
.visualization-container {
    min-height: 400px;
    background: var(--bg-tertiary);
    border-radius: 12px;
    padding: 24px;
    position: relative;
}

.no-data {
    display: flex;
    align-items: center;
    justify-content: center;
    height: 100%;
    color: var(--text-secondary);
    font-size: 1.1rem;
    text-align: center;
}

.visualization-content {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.media-bar-container {
    position: relative;
}

.media-bar-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.media-bar-name {
    font-weight: 600;
    color: var(--text-primary);
}

.media-bar-capacity {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.media-bar {
    height: 40px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    position: relative;
    overflow: hidden;
    transition: all 0.3s ease;
}

.media-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    border-radius: 7px;
    transition: width 0.5s ease;
    display: flex;
    align-items: center;
    padding: 0 12px;
    color: white;
    font-weight: 500;
    font-size: 0.9rem;
}

.media-bar-info {
    position: absolute;
    top: 50%;
    right: 12px;
    transform: translateY(-50%);
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.media-bar-summary {
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-top: 8px;
    padding: 4px 8px;
    background: var(--bg-tertiary);
    border-radius: 6px;
    min-height: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Simulation Controls */
.simulation-controls {
    background: var(--bg-tertiary);
    border-radius: 12px;
    padding: 20px;
    margin-top: 20px;
}

.simulation-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin: 16px 0;
}

.simulation-buttons button {
    min-width: auto;
    padding: 8px 16px;
    font-size: 0.9rem;
}

/* Tooltip */
.tooltip {
    position: absolute;
    background: var(--bg-primary);
    color: var(--text-primary);
    padding: 8px 12px;
    border-radius: 6px;
    border: 1px solid var(--border-color);
    font-size: 0.85rem;
    box-shadow: var(--shadow);
    z-index: 1000;
    pointer-events: none;
    white-space: nowrap;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.tooltip.visible {
    opacity: 1;
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 15px;
    }

    .main-content {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    header h1 {
        font-size: 1.6rem;
    }

    .file-type-selection {
        grid-template-columns: 1fr 1fr;
    }

    .size-input-row {
        flex-direction: column;
        align-items: stretch;
    }

    .size-input-row > * {
        width: 100%;
        min-width: auto;
    }

    .guided-media-section {
        flex-direction: column;
    }

    .file-item,
    .media-item {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }

    .mission-navigation {
        padding: 0 10px;
    }

    .mission-buttons {
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 10px;
    }

    .card {
        padding: 16px;
    }

    header h1 {
        font-size: 1.4rem;
    }

    header p {
        font-size: 1rem;
    }

    .file-type-selection {
        grid-template-columns: 1fr;
    }
}

/* Mission System Styles */
.mission-section {
    margin-top: 30px;
    margin-bottom: 30px;
}

.mission-container {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    box-shadow: var(--shadow);
}

.mission-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.mission-header h2 {
    color: var(--accent-primary);
    font-size: 1.5rem;
    margin: 0;
    flex-grow: 1;
}

.byte-mascot {
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
}

.byte-mascot img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.byte-mascot.celebrating {
    animation: celebrate 0.6s ease-in-out;
}

.mission-help-btn {
    background: var(--accent-warning);
    color: white;
    border: none;
    border-radius: 50%;
    width: 36px;
    height: 36px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.mission-help-btn:hover {
    transform: scale(1.1);
    background: #fb8500;
}

.mission-help-btn.hidden {
    display: none;
}

.mission-content {
    margin-bottom: 20px;
}

.mission-text {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    color: var(--text-primary);
    font-size: 1rem;
    line-height: 1.5;
    margin-bottom: 12px;
}

.mission-progress {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.mission-navigation {
    background: var(--bg-tertiary);
    border-radius: 8px;
    padding: 16px;
}

.mission-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    justify-content: flex-start;
}

.mission-btn {
    padding: 8px 12px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    background: var(--bg-secondary);
    color: var(--text-secondary);
    font-size: 0.85rem;
    cursor: pointer;
    transition: all 0.2s ease;
    min-width: 40px;
    text-align: center;
}

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

.mission-btn.current {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
}

.mission-btn.completed {
    background: var(--accent-secondary);
    color: white;
    border-color: var(--accent-secondary);
}

.mission-btn.locked {
    opacity: 0.3;
    cursor: not-allowed;
}

/* Guided Media Input Styles */
.guided-media-section {
    display: flex;
    gap: 24px;
    align-items: center;
    margin-bottom: 20px;
}

.media-visual {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.media-image {
    width: 80px;
    height: 80px;
    object-fit: contain;
    border-radius: 8px;
    background: var(--bg-tertiary);
    padding: 8px;
    border: 1px solid var(--border-color);
}

.media-label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
}

.media-input-section {
    flex: 1;
}

.instruction-text {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-style: italic;
}

.capacity-input {
    display: flex;
    gap: 12px;
    margin-bottom: 16px;
    align-items: center;
}

.capacity-input input,
.capacity-input select {
    flex: 1;
}

/* Media selection styles */
.media-selection {
    width: 100%;
}

.media-options {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 16px;
    margin: 16px 0;
}

.media-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.media-option:hover {
    background: var(--hover-bg);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.media-option-img {
    width: 48px;
    height: 48px;
    object-fit: contain;
}

.media-option span {
    font-size: 0.9rem;
    color: var(--text-primary);
    font-weight: 500;
}

/* Media bar enhancements */
.media-bar-name {
    display: flex;
    align-items: center;
    gap: 8px;
    font-weight: 600;
    color: var(--text-primary);
}

.media-bar-icon {
    width: 20px;
    height: 20px;
    object-fit: contain;
}

/* Media list enhancements */
.media-visual-small {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--bg-tertiary);
    border-radius: 4px;
    padding: 4px;
}

.media-icon {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.media-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    padding: 24px;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: var(--shadow);
    transform: scale(0.9);
    transition: transform 0.3s ease;
}

.modal-overlay.active .modal-content {
    transform: scale(1);
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 20px;
}

.modal-header-with-byte {
    display: flex;
    align-items: center;
    gap: 16px;
    flex: 1;
}

.modal-header h3 {
    color: var(--accent-primary);
    margin: 0;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 24px;
    cursor: pointer;
    padding: 4px;
    line-height: 1;
    transition: color 0.2s ease;
}

.close-btn:hover {
    color: var(--text-primary);
}

.mission-result {
    color: var(--text-primary);
    line-height: 1.6;
    margin-bottom: 24px;
}

.continue-btn {
    background: var(--accent-primary);
    color: white;
    border: none;
    border-radius: 8px;
    padding: 12px 24px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    width: 100%;
}

.continue-btn:hover {
    background: #2ea043;
    transform: translateY(-1px);
}

.mission-timer {
    margin: 20px 0;
    text-align: center;
}

.timer-bar {
    background: var(--bg-tertiary);
    border-radius: 10px;
    height: 8px;
    width: 100%;
    overflow: hidden;
    margin-bottom: 8px;
}

.timer-progress {
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary));
    height: 100%;
    width: 0%;
    transition: width 0.1s linear;
    border-radius: 10px;
}

.timer-text {
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.help-content {
    color: var(--text-primary);
    line-height: 1.6;
}

.help-buttons {
    display: flex;
    gap: 12px;
    margin-top: 20px;
}

.help-btn-yes,
.help-btn-no {
    flex: 1;
    padding: 12px 16px;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

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

.help-btn-yes:hover {
    background: #2ea043;
}

.help-btn-no {
    background: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

.help-btn-no:hover {
    background: var(--hover-bg);
}

.help-explanation {
    color: var(--text-primary);
    line-height: 1.6;
}

/* Footer Styles */
footer {
    margin-top: 60px;
    padding: 30px 20px;
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
}

.impressum {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
}

.impressum p {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin: 0;
}

.impressum a {
    color: var(--accent-primary);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

/* Animation classes */
.fade-in {
    animation: fadeIn 0.3s ease-in;
}

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

@keyframes celebrate {
    0%, 100% { transform: scale(1) rotate(0deg); }
    25% { transform: scale(1.1) rotate(-5deg); }
    75% { transform: scale(1.1) rotate(5deg); }
}

.pulse {
    animation: pulse 0.5s ease-in-out;
}

@keyframes pulse {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.shake {
    animation: shake 0.5s ease-in-out;
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}