:root {
    --font: 'Inter', -apple-system, sans-serif;
    --primary: #6366f1;
    --primary-rgb: 99, 102, 241;
    --bg: #0f172a;
    --bg-s: #1e293b;
    --bg-t: #334155;
    --text: #f1f5f9;
    --text-s: #94a3b8;
    --text-t: #64748b;
    --border: rgba(148, 163, 184, 0.1);
    --glass: rgba(30, 41, 59, 0.8);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.3);
    --radius: 10px;
    --tr: 200ms ease;
}

[data-theme="light"] {
    --bg: #f8fafc;
    --bg-s: #fff;
    --bg-t: #f1f5f9;
    --text: #0f172a;
    --text-s: #475569;
    --text-t: #94a3b8;
    --border: rgba(15, 23, 42, 0.08);
    --glass: rgba(255, 255, 255, 0.85);
    --shadow: 0 4px 20px rgba(0, 0, 0, 0.06);
}

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

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    transition: background var(--tr), color var(--tr)
}

.container {
    max-width: 960px;
    margin: 0 auto;
    padding: 0 20px
}

.icon {
    width: 18px;
    height: 18px
}

.accent {
    color: var(--primary)
}

.glass-card {
    background: var(--glass);
    backdrop-filter: blur(16px);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow)
}

.header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--glass);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border)
}

.header-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px
}

.logo {
    display: flex;
    align-items: center;
    gap: 8px
}

.logo-icon {
    font-size: 20px
}

.logo-text {
    font-size: 1rem;
    font-weight: 700
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    border: none;
    border-radius: 8px;
    font-family: var(--font);
    font-size: .82rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 150ms;
    white-space: nowrap
}

.btn:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px
}

.btn-primary {
    background: var(--primary);
    color: #fff;
    box-shadow: 0 4px 16px rgba(var(--primary-rgb), .3)
}

.btn-primary:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(var(--primary-rgb), .4)
}

.btn-ghost {
    background: transparent;
    color: var(--text-s)
}

.btn-ghost:hover {
    background: var(--bg-t);
    color: var(--text)
}

.btn-sm {
    padding: 5px 10px;
    font-size: .78rem
}

[data-theme="dark"] .sun {
    display: block
}

[data-theme="dark"] .moon {
    display: none
}

[data-theme="light"] .sun {
    display: none
}

[data-theme="light"] .moon {
    display: block
}

.hero {
    text-align: center;
    padding: 40px 0 20px
}

.hero-title {
    font-size: clamp(1.5rem, 4vw, 2.2rem);
    font-weight: 800;
    letter-spacing: -.03em
}

.hero-sub {
    font-size: .9rem;
    color: var(--text-s);
    margin-top: 6px
}

.options {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
    padding: 14px 20px;
    margin-bottom: 20px
}

.option {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: .82rem;
    color: var(--text-s);
    cursor: pointer
}

.option input[type="checkbox"] {
    accent-color: var(--primary);
    width: 16px;
    height: 16px
}

.editor-grid {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: 12px;
    margin-bottom: 20px
}

.editor-pane {
    display: flex;
    flex-direction: column
}

.editor-center {
    display: flex;
    align-items: center;
    justify-content: center
}

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

.pane-label {
    font-size: .82rem;
    font-weight: 600;
    color: var(--text-s)
}

.pane-actions {
    display: flex;
    gap: 4px
}

.text-area {
    width: 100%;
    padding: 14px;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: var(--bg-s);
    color: var(--text);
    font-family: 'SF Mono', monospace;
    font-size: .8rem;
    line-height: 1.7;
    resize: vertical;
    outline: none;
    transition: border-color var(--tr)
}

.text-area:focus {
    border-color: var(--primary)
}

.text-area::placeholder {
    color: var(--text-t)
}

.stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 1px;
    padding: 0;
    overflow: hidden
}

.stat {
    padding: 16px;
    text-align: center;
    background: var(--bg-s)
}

.stat-value {
    display: block;
    font-size: 1.4rem;
    font-weight: 800;
    letter-spacing: -.02em
}

.stat-label {
    display: block;
    font-size: .72rem;
    color: var(--text-t);
    margin-top: 2px
}

.toast-container {
    position: fixed;
    bottom: 20px;
    right: 20px;
    z-index: 2000
}

.toast {
    padding: 10px 16px;
    background: var(--bg-s);
    border: 1px solid var(--border);
    border-radius: 8px;
    box-shadow: var(--shadow);
    font-size: .8rem;
    animation: slideIn .2s ease, fadeOut .3s ease 2.5s forwards
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(20px)
    }

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

@keyframes fadeOut {
    to {
        opacity: 0
    }
}

.footer {
    margin-top: 48px;
    padding: 20px 0;
    border-top: 1px solid var(--border)
}

.footer-inner {
    text-align: center;
    font-size: .75rem;
    color: var(--text-t)
}

@media(max-width:700px) {
    .editor-grid {
        grid-template-columns: 1fr;
        gap: 8px
    }

    .editor-center {
        transform: rotate(90deg)
    }

    .stats {
        grid-template-columns: repeat(2, 1fr)
    }

    .options {
        gap: 10px
    }
}