/* Encoder/Decoder Toolkit Styles */

:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --bg-color: #ffffff;
    --surface-color: #f9fafb;
    --text-color: #1f2937;
    --text-light: #6b7280;
    --border-color: #e5e7eb;
    --success-color: #10b981;
    --error-color: #ef4444;
    --shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
}

[data-theme="dark"] {
    --bg-color: #111827;
    --surface-color: #1f2937;
    --text-color: #f9fafb;
    --text-light: #9ca3af;
    --border-color: #374151;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    transition: background 0.3s, color 0.3s;
}

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

/* Header */
.header {
    background: var(--surface-color);
    border-bottom: 1px solid var(--border-color);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--primary-color);
}

.logo i {
    font-size: 1.8rem;
}

.theme-toggle {
    background: none;
    border: 2px solid var(--border-color);
    color: var(--text-color);
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.3s;
}

.theme-toggle:hover {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* Tabs */
.tabs {
    display: flex;
    gap: 10px;
    margin: 20px 0;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 12px 24px;
    background: var(--surface-color);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-color);
    transition: all 0.3s;
    display: flex;
    align-items: center;
    gap: 8px;
}

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

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

.tab-content {
    display: none;
    animation: fadeIn 0.3s;
}

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

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

/* Mode Selector */
.mode-selector {
    display: flex;
    gap: 10px;
    margin: 20px 0;
    background: var(--surface-color);
    padding: 5px;
    border-radius: 10px;
    width: fit-content;
}

.mode-btn {
    padding: 10px 30px;
    background: transparent;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-color);
    transition: all 0.3s;
}

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

/* Sub Tabs */
.sub-tabs {
    display: flex;
    gap: 10px;
    margin: 20px 0;
}

.sub-tab-btn {
    padding: 8px 20px;
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-color);
    transition: all 0.3s;
}

.sub-tab-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

.sub-content {
    display: none;
}

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

/* Input Groups */
.input-group {
    margin: 20px 0;
    position: relative;
}

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

textarea {
    width: 100%;
    padding: 12px;
    background: var(--surface-color);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    font-family: 'Courier New', monospace;
    font-size: 0.9rem;
    resize: vertical;
    transition: all 0.3s;
}

textarea:focus {
    outline: none;
    border-color: var(--primary-color);
}

textarea:read-only {
    background: var(--bg-color);
}

.stats {
    margin-top: 5px;
    font-size: 0.85rem;
    color: var(--text-light);
}

/* Buttons */
.btn-copy, .btn-primary {
    padding: 10px 20px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    transition: all 0.3s;
    margin-top: 10px;
}

.btn-copy:hover, .btn-primary:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

.btn-copy-small {
    padding: 5px 10px;
    background: var(--primary-color);
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    font-size: 0.85rem;
    transition: all 0.3s;
}

.btn-copy-small:hover {
    background: var(--primary-dark);
}

/* Upload Area */
.upload-area {
    border: 2px dashed var(--border-color);
    border-radius: 12px;
    padding: 60px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    background: var(--surface-color);
}

.upload-area:hover {
    border-color: var(--primary-color);
    background: var(--bg-color);
}

.upload-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 15px;
}

.upload-area h3 {
    margin: 10px 0;
    color: var(--text-color);
}

.upload-area p {
    color: var(--text-light);
    font-size: 0.9rem;
}

/* Preview Area */
.preview-area {
    margin: 20px 0;
    text-align: center;
}

.preview-area img {
    max-width: 100%;
    max-height: 300px;
    border-radius: 8px;
    box-shadow: var(--shadow-lg);
}

/* File Info */
.file-info {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 15px;
    background: var(--surface-color);
    border-radius: 8px;
    margin: 20px 0;
}

.file-info i {
    font-size: 1.5rem;
    color: var(--primary-color);
}

/* Output Area */
.output-area {
    margin: 20px 0;
}

/* Converter Section */
.converter-section {
    background: var(--surface-color);
    padding: 30px;
    border-radius: 12px;
    margin: 20px 0;
}

.convert-btn-group {
    display: flex;
    align-items: center;
    gap: 20px;
    margin: 20px 0;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.95rem;
    color: var(--text-color);
    cursor: pointer;
}

.checkbox-label input[type="checkbox"] {
    width: 18px;
    height: 18px;
    cursor: pointer;
}

/* Hash Section */
.hash-types {
    display: flex;
    gap: 10px;
    margin: 20px 0;
    flex-wrap: wrap;
}

.hash-btn {
    padding: 10px 20px;
    background: var(--surface-color);
    border: 2px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-color);
    transition: all 0.3s;
}

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

.hash-results {
    margin: 30px 0;
}

.hash-result {
    margin: 15px 0;
    padding: 15px;
    background: var(--surface-color);
    border-radius: 8px;
}

.hash-result label {
    display: block;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--primary-color);
}

.hash-value {
    display: flex;
    align-items: center;
    gap: 10px;
}

.hash-value code {
    flex: 1;
    padding: 10px;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-family: 'Courier New', monospace;
    font-size: 0.85rem;
    word-break: break-all;
    color: var(--text-color);
}

.options {
    margin-top: 20px;
}

/* Status Message */
.status-message {
    display: none;
    padding: 15px;
    background: var(--success-color);
    color: white;
    border-radius: 8px;
    text-align: center;
    margin: 20px 0;
    font-weight: 500;
}

/* Footer */
.footer {
    text-align: center;
    padding: 30px 20px;
    background: var(--surface-color);
    border-top: 1px solid var(--border-color);
    margin-top: 50px;
    color: var(--text-light);
}

/* Responsive */
@media (max-width: 768px) {
    .tabs {
        flex-direction: column;
    }

    .tab-btn {
        width: 100%;
        justify-content: center;
    }

    .converter-section {
        padding: 20px;
    }

    .hash-types {
        flex-direction: column;
    }

    .hash-btn {
        width: 100%;
    }

    .convert-btn-group {
        flex-direction: column;
        align-items: flex-start;
    }
}