:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #10b981;
    --bg-color: #ffffff;
    --card-bg: #ffffff;
    --card-border: #e5e7eb;
    --text-primary: #181818;
    --text-secondary: #6b7280;
    --input-bg: #f9fafb;
    --success-color: #22c55e;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
}

.dark-mode {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --card-border: #334155;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --input-bg: #0f172a;
}

* {
    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-primary);
    min-height: 100vh;
    line-height: 1.6;
    transition: background 0.3s, color 0.3s;
}

/* Container */
.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
    border: 1.5px solid var(--card-border);
    border-radius: 10px;
    background: var(--card-bg);
    transition: background 0.3s, border-color 0.3s;
}

/* Header */
header {
    text-align: center;
    margin-bottom: 20px;
    padding: 20px;
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

header p {
    color: var(--text-primary);
    font-size: 1.1rem;
}

/* Client-side note */
.client-side-note {
    font-size: 0.9rem;
    color: var(--text-primary);
    margin-top: 10px;
    padding: 8px 16px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: 8px;
    display: inline-block;
}

.dark-mode .client-side-note {
    background: rgba(99, 102, 241, 0.15);
    color: #a5b4fc;
}

/* Topbar */
.topbar {
    display: flex;
    justify-content: flex-end;
    align-items: center;
    gap: 1.2rem;
    margin-top: 1.2rem;
    padding: 0 20px;
}

.github-link svg,
#theme-icon svg {
    width: 28px !important;
    height: 28px !important;
    display: block;
    color: var(--text-primary);
    fill: var(--text-primary);
    transition: color 0.2s, fill 0.2s;
}

.theme-toggle-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0.2em;
    border-radius: 50%;
    background: none;
    border: none;
    cursor: pointer;
    transition: background 0.2s;
}

.theme-toggle-btn:focus {
    outline: none;
}

/* Settings Section */
.settings-section {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
}

.settings-section h2 {
    font-size: 1.2rem;
    margin-bottom: 15px;
    color: var(--text-primary);
    font-weight: 700;
}

.settings-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
}

.setting-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* Form Elements */
.form-label {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-primary);
}

.form-input {
    padding: 10px 14px;
    font-size: 1rem;
    background: var(--input-bg);
    border: 2px solid var(--card-border);
    border-radius: 8px;
    color: var(--text-primary);
    transition: border-color 0.3s ease, background 0.3s;
    line-height: 1.5;
    height: 42px;
    box-sizing: border-box;
}

.form-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

input[type="number"].form-input {
    -webkit-appearance: none;
    -moz-appearance: textfield;
    appearance: textfield;
    padding: 10px 14px;
    font-size: 1rem;
    background: var(--input-bg);
    border: 2px solid var(--card-border);
    border-radius: 8px;
    color: var(--text-primary);
    line-height: 1.5;
    height: 42px;
    box-sizing: border-box;
    vertical-align: middle;
}

input[type="number"].form-input:focus {
    outline: none;
    border-color: var(--primary-color);
}

/* Hilangkan spinner di Chrome, Safari, Edge */
input[type="number"].form-input::-webkit-outer-spin-button,
input[type="number"].form-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

/* Hilangkan spinner di Firefox */
input[type="number"].form-input {
    -moz-appearance: textfield;
}

select.form-input {
    appearance: none;
    -webkit-appearance: none;
    -moz-appearance: none;
    padding: 10px 14px;
    font-size: 1rem;
    background: var(--input-bg);
    border: 2px solid var(--card-border);
    border-radius: 8px;
    color: var(--text-primary);
    line-height: 1.5;
    height: 42px;
    box-sizing: border-box;
    cursor: pointer;
    vertical-align: middle;
}

select.form-input option {
    color: var(--text-primary);
    font-family: inherit;
}

.settings-grid .setting-item select.form-input {
    padding: 8px 12px;
    font-size: 0.95rem;
}

/* Toggle Switch */
.toggle-switch {
    position: relative;
    display: inline-block;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
    position: absolute;
}

.toggle-label {
    position: relative;
    display: inline-block;
    width: 52px;
    height: 28px;
    background: var(--card-border);
    border-radius: 14px;
    cursor: pointer;
    transition: background 0.3s;
}

.toggle-switch input:checked + .toggle-label {
    background: var(--primary-color);
}

.toggle-switch-slider {
    position: absolute;
    top: 3px;
    left: 3px;
    width: 22px;
    height: 22px;
    background: white;
    border-radius: 50%;
    transition: transform 0.3s;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.toggle-switch input:checked + .toggle-label .toggle-switch-slider {
    transform: translateX(24px);
}

/* Columns Section */
.columns-section {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.section-header h2 {
    font-size: 1.2rem;
    color: var(--text-primary);
    font-weight: 700;
}

/* Column Item */
.column-item {
    display: flex;
    align-items: center;
    gap: 15px;
    padding: 15px;
    background: var(--input-bg);
    border: 1px solid var(--card-border);
    border-radius: 8px;
    margin-bottom: 10px;
    transition: background 0.3s, border-color 0.3s;
    min-height: 56px;
}

.column-item:hover {
    border-color: var(--primary-color);
}

.column-inputs {
    display: flex;
    align-items: center;
    gap: 15px;
    flex: 1;
    flex-wrap: wrap;
}

.column-field {
    display: flex;
    flex-direction: column;
    gap: 5px;
    flex: 1;
    min-width: 150px;
}

.column-field .form-label {
    font-size: 0.85rem;
    color: var(--text-primary);
}

.column-field .form-input {
    padding: 8px 12px;
    font-size: 0.95rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 20px;
    font-size: 0.95rem;
    font-weight: 600;
    border: 2px solid var(--card-border);
    background: var(--card-bg);
    color: var(--text-primary);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn:hover {
    border-color: var(--primary-color);
    background: rgba(99, 102, 241, 0.1);
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    border-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-hover), #4338ca);
    border-color: var(--primary-hover);
}

.btn-secondary {
    background: var(--card-bg);
    border-color: var(--card-border);
    color: var(--text-primary);
}

.btn-secondary:hover {
    border-color: var(--secondary-color);
    background: var(--card-bg);
    color: var(--text-primary);
}


.btn-add {
    background: transparent;
    border: 2px dashed var(--primary-color);
    color: var(--primary-color);
}

.btn-add:hover {
    background: rgba(99, 102, 241, 0.1);
}

.btn-remove {
    padding: 8px;
    border: none;
    background: transparent;
    color: var(--error-color);
    border-radius: 6px;
    transition: background 0.3s;
}

.btn-remove:hover {
    background: rgba(239, 68, 68, 0.1);
}

.btn-lg {
    padding: 15px 30px;
    font-size: 1.1rem;
}

.btn-group {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.btn-group-block {
    margin: 20px 0;
}

.btn-group-block .btn {
    flex: 1;
}

.action-buttons {
    margin-top: 10px;
}

/* Form Group */
.form-group {
    margin-bottom: 20px;
}

.form-group .form-label {
    display: block;
    margin-bottom: 10px;
    font-size: 1rem;
}

/* Textarea */
textarea.form-input {
    width: 100%;
    min-height: 200px;
    padding: 15px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.9rem;
    resize: vertical;
    line-height: 1.5;
}

textarea.form-input::placeholder {
    color: var(--text-secondary);
}

/* Footer */
footer {
    color: var(--text-primary);
    background: transparent;
    text-align: center;
    padding: 30px 0 10px 0;
    font-size: 0.95rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.3em;
}

footer a {
    color: var(--primary-color);
    text-decoration: underline;
    font-weight: 600;
    transition: color 0.2s;
}

footer .copyright {
    color: var(--text-primary);
    font-size: 0.9em;
    font-weight: 500;
    margin-top: 0.5em;
}

/* Dark Mode Overrides */
.dark-mode body,
.dark-mode {
    background: #0a0a0a;
    color: #fff;
}

.dark-mode .container,
.dark-mode .settings-section,
.dark-mode .columns-section,
.dark-mode .column-item {
    background: #181818 !important;
    border-color: #333 !important;
}

.dark-mode .form-input,
.dark-mode textarea.form-input {
    background: #222 !important;
    border-color: #333 !important;
    color: #fff !important;
}

.dark-mode .form-input:focus,
.dark-mode textarea.form-input:focus {
    border-color: var(--primary-color) !important;
}

.dark-mode .toggle-label {
    background: #444;
}

.dark-mode .btn {
    background: #222;
    border-color: #333;
    color: #fff;
}

.dark-mode .btn:hover {
    background: #333;
    border-color: var(--primary-color);
}

.dark-mode .btn-add {
    background: transparent;
    color: var(--primary-color);
}

.dark-mode .btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--primary-hover));
    border-color: var(--primary-color);
    color: white;
}

.dark-mode .btn-primary:hover {
    background: linear-gradient(135deg, var(--primary-hover), #4338ca);
    border-color: var(--primary-hover);
}

.dark-mode .btn-secondary {
    background: #222;
    border-color: #333;
    color: #fff;
}

.dark-mode .btn-secondary:hover {
    border-color: var(--secondary-color);
    background: #222;
    color: #fff;
}


.dark-mode .column-field .form-label {
    color: #94a3b8;
}

.dark-mode footer a {
    color: #a5b4fc;
}

/* Custom Separator Hide (for grid alignment) */
.hidden-input {
    display: none !important;
}

/* Responsive */
@media (max-width: 768px) {
    header h1 {
        font-size: 2rem;
    }

    .settings-grid {
        grid-template-columns: 1fr;
    }

    .column-inputs {
        flex-direction: column;
    }

    .column-field {
        min-width: 100%;
    }

    .btn-group-block {
        flex-direction: column;
    }

    .btn-group-block .btn {
        width: 100%;
    }

    .section-header {
        flex-direction: column;
        gap: 15px;
        align-items: flex-start;
    }
}

@media (min-width: 769px) {
    .btn-remove {
        margin-top: 0;
    }
}

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

.column-item {
    animation: fadeIn 0.3s ease;
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--input-bg);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb {
    background: var(--card-border);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-secondary);
}

/* Selection */
::selection {
    background: var(--primary-color);
    color: white;
}