:root {
    --bg-color: #0d0e15;
    --ui-bg-rgb: 20, 26, 38;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-gray: #718096;
    --vk-blue: #528bcc;
    --vk-blue-rgb: 82, 139, 204;
    --primary: var(--vk-blue);
    --primary-hover: #4a76a8;
    --accent: #ec4899;
    --success: #10b981;
    --error: #ef4444;
    --border-color: rgba(255, 255, 255, 0.08);
    --card-border: rgba(255, 255, 255, 0.1);
    --element-blur: 16px;
    --bg-item: rgba(255, 255, 255, 0.04);
    --bg-item-active: rgba(255, 255, 255, 0.08);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    -webkit-tap-highlight-color: transparent;
}

body {
    background-color: var(--bg-color);
    color: var(--text-main);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    overflow-x: hidden;
    position: relative;
}

.container {
    width: 100%;
    max-width: 580px;
    padding: 1.5rem;
    z-index: 10;
}

.header {
    text-align: left;
    margin-bottom: 1.5rem;
}

.header h1 {
    font-size: 2.4rem;
    font-weight: 700;
    letter-spacing: -0.05em;
    margin-bottom: 0.2rem;
}

.header span {
    color: var(--vk-blue);
}

.header p {
    color: var(--text-muted);
    font-size: 0.95rem;
    font-weight: 300;
}

/* ── Menu Group & Items (Glaze Style) ──────────────────────  */
.menu-group {
    background: rgba(var(--ui-bg-rgb), 0.6);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 1.2rem;
    backdrop-filter: blur(var(--element-blur));
    -webkit-backdrop-filter: blur(var(--element-blur));
    margin-bottom: 1rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
}

.section-header {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-gray);
    letter-spacing: 0.05em;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.settings-item {
    margin-bottom: 1rem;
}

.settings-item:last-child {
    margin-bottom: 0;
}

.settings-item label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

/* ── Inputs ───────────────────────────────────────────────  */
.text-input,
.textarea-input {
    width: 100%;
    background: var(--bg-item);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    color: var(--text-main);
    font-size: 15px;
    padding: 12px 16px;
    outline: none;
    transition: all 0.2s ease;
}

.text-input:focus,
.textarea-input:focus {
    border-color: rgba(var(--vk-blue-rgb), 0.5);
    background: var(--bg-item-active);
}

.textarea-input {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    resize: vertical;
    min-height: 120px;
}

/* ── Buttons & Chips ──────────────────────────────────────  */
.btn {
    height: 48px;
    border-radius: 12px;
    border: none;
    font-size: 15px;
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: all 0.2s cubic-bezier(0.2, 0.8, 0.2, 1);
    width: 100%;
}

.btn:active {
    transform: scale(0.97);
    opacity: 0.8;
}

.primary-btn {
    background: var(--vk-blue);
    color: white;
    box-shadow: 0 4px 15px rgba(var(--vk-blue-rgb), 0.3);
}

.secondary-btn {
    background: var(--bg-item);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.chip-btn {
    height: 32px;
    padding: 0 12px;
    border-radius: 16px;
    font-size: 13px;
    background: rgba(var(--vk-blue-rgb), 0.15);
    color: var(--vk-blue);
    border: 1px solid rgba(var(--vk-blue-rgb), 0.2);
    width: auto;
}

/* ── Success & Error Areas ───────────────────────────────  */
.result-area,
.error-area {
    background: rgba(var(--ui-bg-rgb), 0.8);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    padding: 2rem;
    backdrop-filter: blur(20px);
    text-align: center;
    animation: slideUp 0.4s cubic-bezier(0.2, 0.8, 0.2, 1);
}

@keyframes slideUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.icon-box {
    width: 64px;
    height: 64px;
    margin: 0 auto 1.2rem;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.success-icon {
    background: rgba(16, 185, 129, 0.15);
    color: var(--success);
}

.error-icon {
    background: rgba(239, 68, 68, 0.15);
    color: var(--error);
}

.icon-box svg {
    width: 32px;
    height: 32px;
}

/* ── Guide Box ───────────────────────────────────────────  */
.guide-box {
    background: rgba(var(--vk-blue-rgb), 0.05);
    border: 1px dashed rgba(var(--vk-blue-rgb), 0.3);
    border-radius: 12px;
    padding: 1rem;
    margin-bottom: 1rem;
}

.guide-box ol {
    padding-left: 1.2rem;
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.6;
}

/* ── Footer ──────────────────────────────────────────────  */
.footer-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    border-radius: 20px;
    background: var(--bg-item);
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    text-decoration: none;
    font-size: 13px;
    transition: all 0.2s;
}

.footer-link:hover {
    background: var(--bg-item-active);
    color: var(--vk-blue);
}

.hidden {
    display: none !important;
}

@media (max-width: 640px) {
    .container {
        padding: 1rem;
    }

    .header h1 {
        font-size: 2rem;
    }
}

/* --- Promo Banner --- */
.promo-banner {
    display: flex;
    align-items: center;
    gap: 1.2rem;
    padding: 1rem 1.5rem;
    background: rgba(82, 139, 204, 0.1);
    border: 1px solid rgba(82, 139, 204, 0.3);
    border-radius: 16px;
    margin-bottom: 2rem;
    text-decoration: none;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    backdrop-filter: blur(var(--element-blur));
    -webkit-backdrop-filter: blur(var(--element-blur));
}

.promo-banner:hover {
    background: rgba(82, 139, 204, 0.15);
    border-color: rgba(82, 139, 204, 0.5);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.promo-banner-icon {
    flex-shrink: 0;
    width: 64px;
    height: 64px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
}

.promo-banner-text {
    flex-grow: 1;
    font-size: 0.95rem;
    line-height: 1.4;
    color: var(--text-main);
    font-family: 'Outfit', sans-serif;
}

.promo-banner-arrow {
    flex-shrink: 0;
    color: var(--vk-blue);
    opacity: 0.6;
    transition: transform 0.3s ease;
}

.promo-banner:hover .promo-banner-arrow {
    transform: translateX(4px);
    opacity: 1;
}

/* --- Promo Banner JAR --- */
.promo-banner-jar {
    background: rgba(229, 100, 92, 0.1);
    border-color: rgba(229, 100, 92, 0.3);
}

.promo-banner-jar:hover {
    background: rgba(229, 100, 92, 0.15);
    border-color: rgba(229, 100, 92, 0.5);
}

.promo-banner-jar .promo-banner-arrow {
    color: #e5645c;
}

@media (max-width: 600px) {
    .promo-banner {
        padding: 0.8rem 1rem;
        gap: 0.8rem;
    }

    .promo-banner-icon {
        width: 36px;
        height: 36px;
    }

    .promo-banner-text {
        font-size: 0.85rem;
    }
}