:root {
    --bg-color: #0c0c10;
    --card-bg: #14141c;
    --accent-color: #7928ca;
    --accent-hover: #983fee;
    --text-color: #e1e1e6;
    --text-muted: #717182;
    --text-subtle: #a1a1b0;
    --border-color: #262633;
    --success-color: #4ade80;
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

.container {
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 14px;
    padding: 30px;
    width: 100%;
    max-width: 720px;
    box-shadow: 0 16px 40px rgba(0, 0, 0, 0.7);
}

header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

h1 {
    font-size: 1.8rem;
    color: #fff;
    letter-spacing: 1px;
}

header h1 {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
}
header h1 img {
    width: 32px;
    height: 32px;
}

.input-group {
    margin-bottom: 20px;
    position: relative;
}

.label-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

label {
    font-weight: 600;
    font-size: 0.9rem;
}

.char-count {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.input-actions {
    display: flex;
    gap: 8px;
    margin-bottom: 6px;
}

textarea {
    width: 100%;
    height: 90px;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    padding: 12px;
    font-size: 1rem;
    resize: vertical;
    outline: none;
    transition: border-color 0.2s;
}

textarea:focus {
    border-color: var(--accent-color);
}

.mode-selector {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
    gap: 8px;
    margin-bottom: 20px;
}

.mode-btn {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    padding: 10px 6px;
    border-radius: 8px;
    font-size: 0.78rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    text-align: center;
}

.mode-btn:hover {
    border-color: var(--accent-color);
    background: rgba(121, 40, 202, 0.05);
}

.mode-btn.active {
    background-color: var(--accent-color);
    border-color: var(--accent-color);
    color: #fff;
    box-shadow: 0 4px 12px rgba(121, 40, 202, 0.4);
}

.controls-panel {
    background: rgba(255, 255, 255, 0.015);
    padding: 15px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
    margin-bottom: 20px;
}

.presets-row {
    display: flex;
    gap: 8px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}

.preset-btn {
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-subtle);
    padding: 5px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
    cursor: pointer;
    transition: 0.2s;
}

.preset-btn:hover {
    border-color: var(--accent-color);
    color: #fff;
}

.controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 15px;
}

.control-item label {
    font-size: 0.78rem;
    margin-bottom: 5px;
    color: var(--text-subtle);
}

input[type="range"] {
    width: 100%;
    accent-color: var(--accent-color);
    cursor: pointer;
}

.output-box {
    position: relative;
    margin-bottom: 20px;
}

.output {
    width: 100%;
    height: 110px;
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-color);
    padding: 12px;
    font-size: 1.1rem;
    overflow-y: auto;
    word-break: break-all;
    white-space: pre-wrap;
    margin-bottom: 12px;
}

.actions-row {
    display: flex;
    gap: 10px;
}

.action-btn {
    background-color: var(--accent-color);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 12px 16px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: background-color 0.2s, transform 0.1s;
    flex: 1;
}

.action-btn:hover {
    background-color: var(--accent-hover);
}

.action-btn:active {
    transform: scale(0.98);
}

.action-btn.secondary {
    background-color: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-color);
    flex: 0 0 auto;
}

.action-btn.secondary:hover {
    border-color: var(--accent-color);
    background: rgba(255, 255, 255, 0.03);
}

.toast {
    text-align: center;
    font-size: 0.85rem;
    color: var(--success-color);
    margin-top: 8px;
    height: 18px;
    opacity: 0;
    transition: opacity 0.3s;
}

.toast.show {
    opacity: 1;
}

footer {
    border-top: 1px solid var(--border-color);
    padding-top: 15px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.78rem;
    color: var(--text-muted);
    flex-wrap: wrap;
    gap: 10px;
}

footer a {
    color: #b183f5;
    text-decoration: none;
}

footer a:hover {
    text-decoration: underline;
}

.hidden {
    display: none !important;
}