:root {
    --primary: #FF2442; /* 小红书红 */
    --primary-glow: rgba(255, 36, 66, 0.4);
    --bg-dark: #0F1115;
    --glass: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --text-main: #FFFFFF;
    --text-dim: #A0A0A0;
}

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

body {
    font-family: 'Outfit', 'Noto Sans SC', sans-serif;
    background-color: var(--bg-dark);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    overflow-x: hidden;
}

/* Background Animated Blobs */
.background-blobs {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    filter: blur(80px);
}

.blob {
    position: absolute;
    border-radius: 50%;
    opacity: 0.5;
    animation: move 20s infinite alternate;
}

.blob-1 {
    width: 400px;
    height: 400px;
    background: #ff2442;
    top: -100px;
    right: -100px;
}

.blob-2 {
    width: 350px;
    height: 350px;
    background: #4a90e2;
    bottom: -50px;
    left: -50px;
    animation-delay: -5s;
}

.blob-3 {
    width: 300px;
    height: 300px;
    background: #f5a623;
    top: 40%;
    left: 10%;
    animation-delay: -10s;
}

@keyframes move {
    from { transform: translate(0, 0) scale(1); }
    to { transform: translate(100px, 100px) scale(1.2); }
}

/* Main Container */
.glass-container {
    background: var(--glass);
    backdrop-filter: blur(20px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 40px;
    width: 90%;
    max-width: 700px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    animation: fadeIn 0.8s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

header {
    text-align: center;
    margin-bottom: 32px;
}

.logo {
    font-size: 3rem;
    margin-bottom: 8px;
}

h1 {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 8px;
    letter-spacing: -0.5px;
}

.subtitle {
    color: var(--text-dim);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

/* Form Elements */
.input-group {
    margin-bottom: 24px;
    display: flex;
    flex-direction: column;
}

label {
    font-weight: 600;
    font-size: 0.9rem;
    margin-bottom: 8px;
    color: var(--text-dim);
}

textarea {
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 16px;
    color: white;
    font-family: inherit;
    font-size: 1rem;
    resize: vertical;
    min-height: 120px;
    transition: all 0.3s ease;
}

textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px var(--primary-glow);
}

/* Settings */
.settings-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
    margin-bottom: 32px;
    align-items: center;
}

@media (max-width: 600px) {
    .settings-grid { grid-template-columns: 1fr; }
}

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

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

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* Toggle Switch */
.toggle-switch {
    display: flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
}

.toggle-switch input {
    display: none;
}

.slider {
    position: relative;
    display: inline-block;
    width: 40px;
    height: 20px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 20px;
    transition: .4s;
    margin-right: 12px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 14px;
    width: 14px;
    left: 3px;
    bottom: 3px;
    background-color: white;
    border-radius: 50%;
    transition: .4s;
}

input:checked + .slider {
    background-color: var(--primary);
}

input:checked + .slider:before {
    transform: translateX(20px);
}

.label-text {
    font-size: 0.95rem;
    color: var(--text-main);
}

/* Buttons */
.primary-btn {
    width: 100%;
    background: var(--primary);
    color: white;
    border: none;
    padding: 16px;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 700;
    cursor: pointer;
    transition: transform 0.2s, background 0.3s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    position: relative;
}

.primary-btn:hover {
    background: #ff3d56;
    transform: translateY(-2px);
    box-shadow: 0 10px 20px -5px var(--primary-glow);
}

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

/* Output Section */
.output-area {
    margin-top: 40px;
    padding-top: 32px;
    border-top: 1px solid var(--glass-border);
}

.output-wrapper {
    position: relative;
}

.output-wrapper textarea {
    width: 100%;
    min-height: 100px;
    background: rgba(255, 255, 255, 0.03);
    border-color: rgba(255, 255, 255, 0.2);
}

.icon-btn {
    position: absolute;
    top: 12px;
    right: 12px;
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: white;
    padding: 8px;
    border-radius: 8px;
    cursor: pointer;
    transition: background 0.2s;
}

.icon-btn:hover {
    background: var(--primary);
}

.label-with-action {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.toast {
    font-size: 0.8rem;
    background: var(--primary);
    padding: 4px 8px;
    border-radius: 4px;
    opacity: 0;
    transition: opacity 0.3s;
}

.toast.show {
    opacity: 1;
}

.tip {
    font-size: 0.8rem;
    color: var(--text-dim);
    margin-top: 12px;
    font-style: italic;
}

footer {
    margin-top: 40px;
    color: var(--text-dim);
    font-size: 0.8rem;
}

/* Loading State */
.loader {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,0.3);
    border-top: 3px solid #fff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    display: none;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.btn-loading .btn-text { display: none; }
.btn-loading .loader { display: block; }