:root {
    --primary-color: #2196F3;
    --secondary-color: #1976D2;
    --background-color: #f5f5f5;
    --text-color: #333;
    --border-color: #ddd;
    --success-color: #4CAF50;
    --error-color: #f44336;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background-color: var(--background-color);
    color: var(--text-color);
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
    padding: 15px;
    background: white;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    gap: 10px;
}

.header-title {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.header-logo {
    width: 35px;
    height: auto;
}

.title-text {
    display: flex;
    flex-direction: column;
}

header h1 {
    color: var(--primary-color);
    margin: 0;
    font-size: clamp(1.2rem, 4vw, 1.5rem);
}

.version {
    color: var(--secondary-color);
    font-size: clamp(0.8rem, 3vw, 0.9rem);
    white-space: nowrap;
}

.file-input-section {
    margin-bottom: 1rem;
}

.drop-zone {
    border: 2px dashed var(--border-color);
    border-radius: 8px;
    padding: 1rem;
    text-align: center;
    background-color: white;
    transition: border-color 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
}

.drop-zone.drag-over {
    border-color: var(--primary-color);
    background-color: rgba(33, 150, 243, 0.1);
}

.browse-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    margin-top: 0;
    transition: background-color 0.3s ease;
}

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

.editor-section {
    background-color: white;
    border-radius: 8px;
    padding: 1rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 0.75rem;
    margin-top: 0.75rem;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
}

.info-item label {
    font-weight: bold;
}

.actions {
    margin-top: 1rem;
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.save-btn {
    background-color: var(--success-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.save-btn:hover {
    background-color: #388E3C;
}

.new-file-btn {
    background-color: var(--secondary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s ease;
}

.new-file-btn:hover {
    background-color: #1565C0;
}

.edit-input {
    width: 100%;
    padding: 4px 8px;
    border: 1px solid var(--border-color);
    border-radius: 4px;
    font-size: 14px;
    height: 28px;
}

.original-values {
    margin-bottom: 1rem;
    padding: 0.75rem;
    background-color: var(--background-color);
    border-radius: 4px;
}

.mac-input-group {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.mac-input-group .edit-input {
    flex: 1;
}

.generate-mac-btn {
    background-color: var(--primary-color);
    color: white;
    border: none;
    width: 28px;
    height: 28px;
    border-radius: 4px;
    cursor: pointer;
    padding: 2px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color 0.3s ease;
}

.generate-mac-btn:hover {
    background-color: var(--secondary-color);
}

h2 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.flashcode-item span {
    white-space: pre-line;  /* Preserve line breaks */
}

/* Validation button styling */
.validate-btn {
    background-color: #2196F3;
    color: white;
    padding: 10px 20px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    margin-right: 10px;
}

.validate-btn:hover {
    background-color: #1976D2;
}

/* Validation results section */
.validation-results {
    margin-top: 20px;
    padding: 20px;
    background-color: #f5f5f5;
    border-radius: 4px;
}

.validation-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-top: 15px;
}

.messages-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.messages-list li {
    padding: 8px;
    margin-bottom: 8px;
    border-radius: 4px;
}

.messages-list li.error {
    background-color: #ffebee;
    color: #c62828;
}

.messages-list li.warning {
    background-color: #fff3e0;
    color: #ef6c00;
}

.messages-list li.success {
    background-color: #e8f5e9;
    color: #2e7d32;
}

.checksum-grid {
    display: grid;
    gap: 10px;
}

.checksum-item {
    display: grid;
    grid-template-columns: auto 1fr;
    gap: 10px;
    align-items: center;
}

.checksum-item label {
    font-weight: bold;
}

.user-info {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 15px;
    font-size: clamp(0.8rem, 3vw, 0.9rem);
}

.user-info span {
    color: #666;
    white-space: nowrap;
}

.user-info strong {
    color: var(--primary-color);
}

#logoutBtn {
    padding: 8px 15px;
    background-color: var(--secondary-color);
    color: white;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    transition: background-color 0.3s;
}

#logoutBtn:hover {
    background-color: var(--primary-color);
}

/* Media Queries */
@media (max-width: 768px) {
    header {
        padding: 10px;
        gap: 5px;
    }

    .header-title {
        flex-direction: row;  /* Keep title and version on same line */
        gap: 8px;
        width: 100%;
        justify-content: center;
    }

    .version {
        font-size: 0.75rem;
        padding: 2px 5px;
        background: var(--background-color);
        border-radius: 3px;
    }

    .user-info {
        width: 100%;
        justify-content: center;
        padding-top: 5px;
        border-top: 1px solid var(--border-color);
        margin-top: 5px;
    }

    .user-info span {
        font-size: 0.8rem;
    }

    #logoutBtn {
        padding: 5px 10px;
        font-size: 0.8rem;
    }

    .header-logo {
        width: 30px;
    }
}

/* Additional adjustments for very small screens */
@media (max-width: 480px) {
    header h1 {
        font-size: 1rem;
    }

    .version {
        font-size: 0.7rem;
    }

    .user-info {
        flex-direction: row;  /* Keep user info on one line */
        flex-wrap: wrap;
        gap: 8px;
    }

    .user-info span {
        font-size: 0.75rem;
    }

    #logoutBtn {
        width: auto;  /* Don't make button full width */
        margin-top: 0;
    }

    .header-logo {
        width: 25px;
    }
}

/* Container padding adjustment for mobile */
@media (max-width: 576px) {
    .container {
        padding: 1rem;
    }
}

.sample-btn {
    background-color: var(--secondary-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    margin-top: 0;
    transition: background-color 0.3s ease;
}

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

.drop-zone {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

@media (max-width: 480px) {
    .drop-zone {
        flex-direction: column;
        padding: 1.5rem;
    }
    
    .drop-zone p {
        margin: 0.25rem 0;
    }
}

.no-downloads-message {
    text-align: center;
    padding: 1rem;
    margin: 1rem 0;
    background-color: #fff3e0;
    border: 1px solid #ffb74d;
    border-radius: 4px;
    color: #e65100;
}

.no-downloads-message p {
    margin: 0.5rem 0;
}

.no-downloads-message p:first-child {
    font-weight: bold;
}