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

:root {
    --primary-color: #25F4EE;
    --primary-dark: #1eb8af;
    --dark-bg: #0a0e27;
    --darker-bg: #050a15;
    --text-primary: #ffffff;
    --text-secondary: #b0b8cc;
    --text-light: #8a92aa;
    --success: #4ade80;
    --warning: #facc15;
    --danger: #ef4444;
    --info: #3b82f6;
    --input-bg: #1a1f3a;
    --input-border: #2a3150;
    --border-color: #2a3150;
    --card-bg: #141b2f;
}

html, body {
    width: 100%;
    min-height: 100vh;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', sans-serif;
    background: linear-gradient(135deg, var(--darker-bg) 0%, var(--dark-bg) 100%);
    background-attachment: fixed;
    color: var(--text-primary);
    overflow-x: hidden;
    font-size: 16px;
    font-weight: 500;
    line-height: 1.6;
    letter-spacing: 0.3px;
    touch-action: manipulation;
}

.container {
    width: 100%;
    max-width: 700px;
    margin: 0 auto;
    padding: 16px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Animations */
@keyframes slideDown {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

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

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes glow {
    0%, 100% { filter: drop-shadow(0 0 8px rgba(37, 244, 238, 0.3)); }
    50% { filter: drop-shadow(0 0 15px rgba(37, 244, 238, 0.6)); }
}

@keyframes checkBounce {
    0% { transform: scale(0.8) rotate(-10deg); }
    50% { transform: scale(1.1); }
    100% { transform: scale(1) rotate(0); }
}

@keyframes ripple {
    to { width: 300px; height: 300px; opacity: 0; }
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* Header */
.header {
    text-align: center;
    padding: 28px 16px;
    border-bottom: 2px solid var(--border-color);
    margin-bottom: 25px;
    background: linear-gradient(135deg, rgba(37, 244, 238, 0.08) 0%, rgba(37, 244, 238, 0.02) 100%);
    border-radius: 16px;
    animation: slideDown 0.5s ease-out;
}

.header h1 {
    font-size: 32px;
    margin-bottom: 10px;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, var(--primary-color), #1eb8af);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    animation: glow 2s ease-in-out infinite;
}

.header .subtitle {
    font-size: 15px;
    color: var(--text-secondary);
    font-weight: 500;
    letter-spacing: 0.2px;
    animation: fadeInUp 0.7s ease-out 0.1s both;
}

/* Main Content */
.main-content {
    width: 100%;
    flex: 1;
}

.form-section {
    margin-bottom: 18px;
    background: var(--card-bg);
    padding: 16px;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    animation: fadeIn 0.4s ease-out;
}

.form-section:hover {
    border-color: rgba(37, 244, 238, 0.4);
    background: rgba(37, 244, 238, 0.03);
    box-shadow: 0 8px 24px rgba(37, 244, 238, 0.1);
    transform: translateY(-2px);
}

.form-section h3 {
    font-size: 14px;
    font-weight: 600;
    margin-bottom: 12px;
    color: var(--primary-color);
    letter-spacing: 0.3px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.form-label {
    display: block;
    font-size: 12px;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
    letter-spacing: 0.2px;
    text-transform: uppercase;
    opacity: 0.9;
}

/* Inputs */
.select-input,
.text-input,
.file-input {
    width: 100%;
    padding: 12px 14px;
    background: var(--input-bg);
    border: 1.5px solid var(--input-border);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 15px;
    font-family: inherit;
    font-weight: 500;
    transition: all 0.3s ease;
    letter-spacing: 0.2px;
}

.select-input {
    color-scheme: dark;
    appearance: none;
    background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2325F4EE' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 10px center;
    background-size: 18px;
    padding-right: 36px;
}

.select-input > option {
    background: var(--darker-bg);
    color: var(--text-primary);
    font-weight: 500;
    padding: 8px;
    border: none;
}

.select-input > option:checked {
    background: linear-gradient(var(--primary-color), var(--primary-color));
    background-color: var(--primary-color) !important;
    color: var(--darker-bg) !important;
}

.select-input:focus,
.text-input:focus,
.file-input:focus {
    outline: none;
    border-color: var(--primary-color);
    background-color: rgba(37, 244, 238, 0.08);
    box-shadow: 0 0 20px rgba(37, 244, 238, 0.3);
    transform: scale(1.02);
}

.select-input::placeholder,
.text-input::placeholder {
    color: var(--text-light);
    font-weight: 400;
}

/* Checkbox Group */
.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 14px;
    padding: 10px 12px;
    border-radius: 8px;
    transition: all 0.2s ease;
    user-select: none;
    font-weight: 500;
    color: var(--text-primary);
    border: 1px solid transparent;
    position: relative;
}

.checkbox-label:hover {
    background: rgba(37, 244, 238, 0.1);
    border-color: rgba(37, 244, 238, 0.3);
    transform: translateX(-4px);
}

.checkbox-label:active {
    transform: scale(0.98) translateX(-4px);
}

.checkbox-input {
    width: 18px;
    height: 18px;
    margin-left: 10px;
    cursor: pointer;
    accent-color: var(--primary-color);
    transition: all 0.2s ease;
}

.checkbox-input:checked {
    animation: checkBounce 0.4s ease;
}

/* Download Folder Display */
.download-folder-display {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    background: var(--input-bg);
    padding: 12px 14px;
    border-radius: 8px;
    border: 1.5px solid var(--input-border);
    transition: all 0.3s ease;
    flex-wrap: wrap;
}

.download-folder-display:hover {
    border-color: rgba(37, 244, 238, 0.3);
    box-shadow: 0 4px 12px rgba(37, 244, 238, 0.15);
}

.download-folder-display p {
    flex: 1;
    font-size: 12px;
    color: var(--text-secondary);
    word-break: break-all;
    font-weight: 500;
    font-family: 'Courier New', monospace;
    min-width: 200px;
}

/* Buttons */
.btn {
    padding: 13px 20px;
    border: none;
    border-radius: 10px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    width: 100%;
    margin-bottom: 10px;
    letter-spacing: 0.3px;
    text-transform: uppercase;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 0;
    height: 0;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.2);
    transform: translate(-50%, -50%);
    pointer-events: none;
}

.btn:active::before {
    animation: ripple 0.6s ease-out;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-dark));
    color: var(--darker-bg);
    font-weight: 700;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(37, 244, 238, 0.5);
}

.btn-primary:active {
    transform: translateY(-1px);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-warning {
    background: linear-gradient(135deg, var(--warning), #e8b109);
    color: var(--darker-bg);
    font-weight: 600;
}

.btn-warning:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(250, 204, 21, 0.4);
}

.btn-danger {
    background: linear-gradient(135deg, var(--danger), #dc2626);
    color: white;
    font-weight: 600;
}

.btn-danger:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(239, 68, 68, 0.4);
}

.btn-secondary {
    background: transparent;
    color: var(--primary-color);
    border: 1.5px solid var(--primary-color);
    font-weight: 600;
}

.btn-secondary:hover:not(:disabled) {
    background: rgba(37, 244, 238, 0.1);
    box-shadow: 0 4px 16px rgba(37, 244, 238, 0.3);
}

.btn-small {
    padding: 8px 14px;
    font-size: 12px;
    width: auto;
    margin-bottom: 0;
    margin-left: 8px;
    flex-shrink: 0;
}

.button-group {
    margin: 20px 0;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

/* Progress Bar */
.progress-container {
    width: 100%;
    margin-bottom: 15px;
    display: none;
}

.progress-container.visible {
    display: block;
    animation: slideDown 0.3s ease-out;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--input-bg);
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid var(--input-border);
    margin-bottom: 12px;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--success));
    width: 0%;
    transition: width 0.4s ease;
    box-shadow: 0 0 12px rgba(37, 244, 238, 0.6);
}

.progress-text {
    font-size: 12px;
    color: var(--text-light);
    text-align: center;
    font-weight: 500;
    letter-spacing: 0.2px;
}

/* Output Box */
.output-box {
    background: var(--input-bg);
    border: 1.5px solid var(--input-border);
    border-radius: 8px;
    padding: 14px;
    max-height: 300px;
    overflow-y: auto;
    font-size: 12px;
    font-family: 'Courier New', 'Monaco', monospace;
    line-height: 1.6;
    letter-spacing: 0.3px;
    margin-top: 15px;
    display: none;
}

.output-box.visible {
    display: block;
    animation: slideUp 0.3s ease-out;
}

.output-text {
    color: var(--text-light);
    word-wrap: break-word;
    white-space: pre-wrap;
}

.output-text .success {
    color: var(--success);
    font-weight: 600;
}

.output-text .error {
    color: var(--danger);
    font-weight: 600;
}

.output-text .warning {
    color: var(--warning);
    font-weight: 600;
}

.output-text .info {
    color: var(--primary-color);
    font-weight: 600;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

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

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
    transition: all 0.3s ease;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary-color);
    box-shadow: 0 0 8px rgba(37, 244, 238, 0.4);
}

/* Tab/Tablet Responsive */
@media (min-width: 481px) and (max-width: 768px) {
    .container {
        padding: 14px;
    }

    .header {
        padding: 24px 14px;
    }

    .header h1 {
        font-size: 28px;
    }

    .form-section {
        padding: 14px;
    }

    .btn {
        padding: 12px 18px;
        font-size: 14px;
    }
}

/* Mobile Responsive - Small Phones */
@media (max-width: 480px) {
    .container {
        padding: 10px;
        margin: 0;
    }

    .header {
        padding: 20px 12px;
        margin-bottom: 18px;
        border-radius: 12px;
    }

    .header h1 {
        font-size: 24px;
        margin-bottom: 8px;
    }

    .header .subtitle {
        font-size: 13px;
    }

    .form-section {
        padding: 12px;
        margin-bottom: 14px;
        border-radius: 10px;
    }

    .form-label {
        font-size: 11px;
        margin-bottom: 6px;
    }

    .select-input,
    .text-input,
    .file-input {
        font-size: 14px;
        padding: 10px 12px;
        border-radius: 8px;
    }

    .btn {
        padding: 11px 14px;
        font-size: 13px;
        margin-bottom: 8px;
        border-radius: 8px;
    }

    .btn-small {
        padding: 7px 12px;
        font-size: 11px;
        margin-left: 6px;
    }

    .output-box {
        max-height: 250px;
        font-size: 11px;
        padding: 10px;
        margin-top: 12px;
    }

    .checkbox-label {
        font-size: 13px;
        padding: 8px 10px;
    }

    .checkbox-input {
        width: 16px;
        height: 16px;
    }

    .download-folder-display {
        padding: 10px 12px;
        gap: 8px;
    }

    .download-folder-display p {
        font-size: 11px;
        min-width: 150px;
    }

    .button-group {
        margin: 16px 0;
        gap: 8px;
    }

    .progress-text {
        font-size: 11px;
    }
}

/* Extra Small Phones */
@media (max-width: 360px) {
    .header h1 {
        font-size: 20px;
    }

    .btn {
        padding: 10px 12px;
        font-size: 12px;
    }

    .form-section {
        padding: 10px;
    }

    .select-input,
    .text-input,
    .file-input {
        font-size: 13px;
        padding: 9px 10px;
    }
}

/* Touch Device Optimization */
@media (hover: none) and (pointer: coarse) {
    .btn {
        padding: 14px 18px;
        font-size: 15px;
    }

    .form-section {
        padding: 14px;
    }

    .select-input:focus,
    .text-input:focus,
    .file-input:focus {
        font-size: 16px;
    }

    button:active {
        transform: scale(0.98);
    }
}

/* Landscape Orientation */
@media (max-height: 600px) and (orientation: landscape) {
    .container {
        padding: 8px;
    }

    .header {
        padding: 12px 8px;
        margin-bottom: 12px;
    }

    .header h1 {
        font-size: 20px;
        margin-bottom: 4px;
    }

    .header .subtitle {
        font-size: 12px;
    }

    .form-section {
        padding: 10px;
        margin-bottom: 8px;
    }

    .button-group {
        margin: 8px 0;
    }

    .output-box {
        max-height: 150px;
    }
}