:root {
    --dark-bg: #1a1f2e;
    --card-bg: #272b38;
    --accent: #5b5fc7;
    --text-color: #ffffff;
    --text-secondary: #aaaaaa;
    --success-color: #4CAF50;
    --error-color: #FF5252;
}

/* Security Protection Styles */
* {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
    -webkit-touch-callout: none;
}

input, textarea {
    -webkit-user-select: text !important;
    -moz-user-select: text !important;
    -ms-user-select: text !important;
    user-select: text !important;
}

img {
    pointer-events: none;
    -webkit-user-drag: none;
    -moz-user-drag: none;
    -o-user-drag: none;
}

body {
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

/* Login Screen Styles */
.login-screen {
    display: flex;
    justify-content: center;
    align-items: center;
    height: 100vh;
    width: 100%;
    position: fixed;
    top: 0;
    left: 0;
    background-color: var(--dark-bg);
    z-index: 1000;
}

.login-card {
    background-color: var(--card-bg);
    padding: 40px;
    border-radius: 10px;
    width: 90%;
    max-width: 400px;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    text-align: center;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.login-card h1 {
    margin-bottom: 10px;
    color: var(--accent);
}

.login-card p {
    margin-bottom: 30px;
    color: var(--text-secondary);
}

.login-error {
    color: var(--error-color);
    margin-top: 20px;
    min-height: 20px;
    font-size: 0.9rem;
}

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

body {
    font-family: 'Segoe UI', Arial, sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-color);
    line-height: 1.6;
    padding: 20px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    flex: 1;
}

header {
    text-align: center;
    margin-bottom: 30px;
    padding: 20px;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    color: var(--accent);
}

.tabs {
    display: flex;
    justify-content: center;
    margin-bottom: 20px;
}

.tab-btn {
    background-color: var(--card-bg);
    color: var(--text-color);
    border: none;
    padding: 12px 24px;
    margin: 0 5px;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.tab-btn:hover {
    background-color: rgba(91, 95, 199, 0.6);
}

.tab-btn.active {
    background-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
}

.card {
    background-color: var(--card-bg);
    border-radius: 10px;
    padding: 20px;
    margin-bottom: 20px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.card h2 {
    font-size: 1.5rem;
    margin-bottom: 20px;
    color: var(--accent);
    text-align: center;
}

.file-input-container {
    margin-bottom: 15px;
}

input[type="file"] {
    display: none;
}

.custom-file-upload {
    display: inline-block;
    padding: 12px 20px;
    background-color: var(--accent);
    color: white;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s;
    margin-bottom: 10px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    width: 100%;
    text-align: center;
}

.custom-file-upload:hover {
    background-color: rgba(91, 95, 199, 0.8);
}

.custom-file-upload i {
    margin-right: 8px;
}

.selected-files {
    background-color: rgba(30, 34, 49, 0.7);
    border-radius: 8px;
    padding: 10px;
    min-height: 60px;
    margin-top: 10px;
    max-height: 150px;
    overflow-y: auto;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.file-item {
    margin-bottom: 5px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.file-item .remove-file {
    color: var(--error-color);
    cursor: pointer;
}

.password-section {
    margin: 20px 0;
}

.password-section label {
    display: block;
    margin-bottom: 8px;
}

.password-section input {
    width: 100%;
    padding: 12px;
    background-color: rgba(30, 34, 49, 0.7);
    border-radius: 8px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-color);
    font-size: 1rem;
}

.buttons {
    display: flex;
    justify-content: center;
    margin-top: 25px;
}

.action-btn {
    padding: 12px 30px;
    background-color: var(--accent);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.2s;
    font-weight: bold;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.action-btn:hover {
    background-color: rgba(91, 95, 199, 0.8);
    transform: translateY(-2px);
}

.action-btn:active {
    transform: translateY(0);
}

.progress-container {
    margin: 25px 0;
}

.progress-bar-wrapper {
    width: 100%;
    height: 15px;
    background-color: var(--card-bg);
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.progress-bar {
    height: 100%;
    width: 0;
    background-color: var(--accent);
    transition: width 0.3s;
}

.progress-text {
    text-align: center;
    margin-top: 8px;
    font-size: 0.9rem;
}

.status-container {
    text-align: center;
    margin: 20px 0;
    min-height: 25px;
}

.status-text {
    padding: 8px 15px;
    display: inline-block;
    border-radius: 5px;
}

.status-success {
    background-color: rgba(76, 175, 80, 0.2);
    color: var(--success-color);
}

.status-error {
    background-color: rgba(255, 82, 82, 0.2);
    color: var(--error-color);
}

footer {
    text-align: center;
    padding: 20px;
    margin-top: 40px;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 1000;
    justify-content: center;
    align-items: center;
}

.modal-content {
    background-color: var(--card-bg);
    border-radius: 10px;
    padding: 25px;
    width: 80%;
    max-width: 600px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.3);
    position: relative;
    max-height: 80vh;
    overflow-y: auto;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.close-modal {
    position: absolute;
    top: 15px;
    right: 15px;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
}

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

.modal h2 {
    margin-bottom: 20px;
    text-align: center;
    color: var(--accent);
}

.modal-buttons {
    display: flex;
    justify-content: center;
    margin-top: 20px;
}

/* PNG Generator Styles */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--text-color);
    font-weight: 500;
}

.form-group input[type="number"],
.form-group input[type="text"],
.form-group input[type="color"],
.form-group select {
    width: 100%;
    padding: 10px;
    background-color: var(--dark-bg);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 5px;
    color: var(--text-color);
    font-size: 1rem;
}

.form-group input[type="range"] {
    width: 100%;
    height: 8px;
    border-radius: 5px;
    background: var(--dark-bg);
    outline: none;
}

.form-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
}

.form-group input[type="range"]::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent);
    cursor: pointer;
    border: none;
}

.form-group input[type="color"] {
    height: 50px;
    cursor: pointer;
    padding: 5px;
}

.form-group select {
    cursor: pointer;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--accent);
}

.size-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-top: 8px;
}

.preset-btn {
    padding: 8px 12px;
    background-color: var(--card-bg);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 5px;
    color: var(--text-color);
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.3s;
}

.preset-btn:hover {
    background-color: var(--accent);
    border-color: var(--accent);
    transform: translateY(-2px);
}

.preset-btn:active {
    transform: translateY(0);
}

.style-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
    margin-top: 10px;
}

.style-card {
    background: var(--card-bg);
    border: 2px solid rgba(255, 255, 255, 0.1);
    border-radius: 8px;
    padding: 15px 10px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
}

.style-card:hover {
    border-color: var(--accent);
    transform: translateY(-3px);
    box-shadow: 0 6px 12px rgba(91, 95, 199, 0.3);
}

.style-card.active {
    border-color: var(--accent);
    background: linear-gradient(135deg, rgba(91, 95, 199, 0.2), rgba(91, 95, 199, 0.05));
    box-shadow: 0 4px 12px rgba(91, 95, 199, 0.4);
}

.style-icon {
    font-size: 2rem;
    margin-bottom: 8px;
}

.style-name {
    font-weight: bold;
    color: var(--text-color);
    font-size: 0.95rem;
    margin-bottom: 4px;
}

.style-desc {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.checkbox-group {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 8px;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    gap: 5px;
    cursor: pointer;
    margin-bottom: 0;
    font-weight: normal;
}

.checkbox-group input[type="checkbox"] {
    width: auto;
    cursor: pointer;
    margin: 0;
}

#png-preview-container {
    background-color: rgba(0, 0, 0, 0.2);
    padding: 20px;
    border-radius: 8px;
}

#png-preview-canvas {
    background-color: transparent;
    border-radius: 4px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

#png-info {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
}

@media (max-width: 768px) {
    .tabs {
        flex-direction: column;
    }
    
    .tab-btn {
        margin: 5px 0;
    }
    
    .modal-content {
        width: 95%;
    }
}