:root {
    --bg-main: #f5f7fa;
    --bg-surface: #ffffff;
    --bg-muted: #f8fafc;
    --border-soft: #e5e9f2;
    --heading: #0f172a;
    --body: #64748b;
    --label: #94a3b8;
    --shadow-soft: 0 20px 40px rgba(0, 0, 0, 0.04);
    --gradient-primary: linear-gradient(135deg, #22c55e 0%, #14b8a6 100%);
    --gradient-soft: linear-gradient(135deg, rgba(34, 197, 94, 0.12) 0%, rgba(20, 184, 166, 0.12) 100%);
    --radius-lg: 20px;
    --radius-md: 16px;
    --radius-sm: 12px;
    --transition-fast: 0.25s ease-in-out;
    --transition-base: 0.3s ease;
    --content-max: 1240px;
}

* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    min-height: 100%;
    font-family: "Inter", sans-serif;
    background: var(--bg-main);
    color: var(--body);
}

body {
    line-height: 1.6;
}

button,
select,
textarea {
    font: inherit;
}

button {
    cursor: pointer;
}

.app-shell {
    min-height: 100vh;
}

.main-content {
    padding: 40px 24px 48px;
}

.main-content > * {
    max-width: var(--content-max);
    margin: 0 auto;
}

.hero-card,
.translator-card {
    background: #ffffff;
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-soft);
}

.hero-card {
    display: grid;
    grid-template-columns: minmax(0, 1fr) auto;
    gap: 24px;
    padding: 32px;
    margin-bottom: 44px;
}

.brand-lockup,
.output-header,
.toolbar,
.form-footer {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
}

.brand-lockup {
    justify-content: flex-start;
    align-items: center;
}

.brand-badge {
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    border-radius: 16px;
    background: var(--gradient-primary);
    color: #ffffff;
    display: grid;
    place-items: center;
    font-weight: 800;
    letter-spacing: 0.02em;
}

.brand-copy h1,
.output-header h2 {
    margin: 0;
    color: var(--heading);
}

.brand-copy h1 {
    font-size: clamp(1.7rem, 2vw, 2.2rem);
    line-height: 1.2;
    max-width: 700px;
}

.eyebrow,
.field-label,
.helper-text {
    margin: 0;
    color: var(--label);
    font-size: 0.84rem;
}

.hero-text {
    max-width: 600px;
    margin: 16px 0 0;
}

.header-menu {
    position: relative;
    align-self: flex-start;
}

.menu-button,
.utility-button,
.swap-button,
.language-select,
.translation-textarea {
    transition: background var(--transition-base), border-color var(--transition-base), box-shadow var(--transition-base), transform var(--transition-base), opacity var(--transition-fast);
}

.menu-button,
.utility-button,
.swap-button {
    border: 1px solid var(--border-soft);
    background: #ffffff;
    color: var(--heading);
}

.menu-button {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: 12px;
    display: grid;
    place-items: center;
}

.menu-button span {
    display: block;
    width: 16px;
    height: 2px;
    margin: 2px 0;
    background: currentColor;
    border-radius: 999px;
}

.menu-button:hover,
.utility-button:hover,
.swap-button:hover,
.language-select:hover,
.translation-textarea:hover {
    border-color: #b8e7da;
    box-shadow: 0 14px 32px rgba(20, 184, 166, 0.08);
}

.menu-button:focus,
.utility-button:focus,
.swap-button:focus,
.language-select:focus,
.translation-textarea:focus,
.primary-button:focus {
    outline: none;
    border-color: #76d5c8;
    box-shadow: 0 0 0 4px rgba(20, 184, 166, 0.1);
}

.menu-panel {
    position: absolute;
    top: calc(100% + 10px);
    right: 0;
    width: 240px;
    padding: 14px 16px;
    border: 1px solid var(--border-soft);
    border-radius: 16px;
    background: #ffffff;
    box-shadow: var(--shadow-soft);
    z-index: 12;
}

.menu-panel p {
    margin: 0;
    font-size: 0.88rem;
}

.menu-panel p + p {
    margin-top: 10px;
}

.translator-grid {
    display: grid;
    grid-template-columns: repeat(12, minmax(0, 1fr));
    gap: 28px;
}

.translator-card {
    padding: 32px;
}

.translator-card--input {
    grid-column: span 7;
}

.translator-card--output {
    grid-column: span 5;
}

.toolbar {
    align-items: flex-end;
    margin-bottom: 24px;
}

.toolbar__group {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.language-select,
.translation-textarea {
    width: 100%;
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-md);
    background: #ffffff;
    color: var(--heading);
}

.language-select {
    padding: 14px 16px;
    appearance: auto;
    font-weight: 500;
}

.swap-button {
    width: 40px;
    height: 40px;
    padding: 0;
    border-radius: 12px;
    flex-shrink: 0;
    margin-bottom: 4px;
}

.swap-button:hover,
.swap-button:focus {
    background: var(--gradient-soft);
}

.translation-textarea {
    min-height: 280px;
    resize: none;
    padding: 20px;
    font-size: 1rem;
    line-height: 1.7;
}

.form-footer {
    margin-top: 20px;
}

.primary-button,
.utility-button {
    border-radius: 14px;
    padding: 13px 18px;
    font-weight: 700;
}

.primary-button {
    border: none;
    background: var(--gradient-primary);
    color: #ffffff;
    min-width: 160px;
}

.primary-button:hover,
.primary-button:focus {
    transform: translateY(-1px);
    box-shadow: 0 16px 34px rgba(20, 184, 166, 0.2);
}

.primary-button[disabled] {
    cursor: wait;
    opacity: 0.85;
}

.utility-button {
    min-width: 78px;
}

.utility-button:hover,
.utility-button:focus {
    background: var(--gradient-soft);
}

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

.feedback {
    margin: 20px 0;
    padding: 14px 16px;
    border-radius: var(--radius-sm);
    border: 1px solid transparent;
    background: var(--bg-muted);
}

.feedback--error {
    background: #fff7f7;
    border-color: #fecaca;
    color: #b91c1c;
}

.feedback--success {
    background: #f0fdf4;
    border-color: #bbf7d0;
    color: #166534;
}

.output-panel {
    position: relative;
    min-height: 320px;
    padding: 22px;
    border-radius: var(--radius-md);
    border: 1px solid var(--border-soft);
    background: #ffffff;
    color: var(--heading);
    white-space: pre-wrap;
    line-height: 1.7;
}

.output-panel:empty::before {
    content: attr(data-placeholder);
    color: var(--label);
}

.output-panel.is-loading {
    color: transparent;
}

.output-panel.is-loading::before,
.output-panel.is-loading::after {
    content: "";
    position: absolute;
    left: 22px;
    right: 22px;
    height: 12px;
    border-radius: 999px;
    background: linear-gradient(90deg, #eef2f7 0%, #f7fafc 50%, #eef2f7 100%);
    background-size: 200% 100%;
    animation: shimmer 1.25s linear infinite;
}

.output-panel.is-loading::before {
    top: 28px;
}

.output-panel.is-loading::after {
    top: 52px;
    right: 30%;
}

@keyframes shimmer {
    0% {
        background-position: 200% 0;
    }
    100% {
        background-position: -200% 0;
    }
}

.captcha-container {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-top: 16px;
    padding: 12px;
    background: var(--bg-muted);
    border: 1px solid var(--border-soft);
    border-radius: var(--radius-sm);
}

.simple-captcha-img {
    height: 48px;
    border-radius: 8px;
    border: 1px solid var(--border-soft);
    background: #fff;
}

.simple-captcha-text {
    flex: 1;
    height: 48px;
    padding: 0 16px;
    border: 1px solid var(--border-soft);
    border-radius: 8px;
    background: #ffffff;
    color: var(--heading);
    font-size: 1rem;
    transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.simple-captcha-text:hover {
    border-color: #b8e7da;
}

.simple-captcha-text:focus {
    outline: none;
    border-color: #76d5c8;
    box-shadow: 0 0 0 4px rgba(20, 184, 166, 0.1);
}

@media (max-width: 1180px) {
    .translator-grid {
        grid-template-columns: 1fr;
    }

    .translator-card--input,
    .translator-card--output {
        grid-column: span 1;
    }
}

@media (max-width: 720px) {
    .main-content {
        padding: 24px 16px 36px;
    }

    .hero-card,
    .translator-card {
        padding: 24px;
    }

    .hero-card,
    .toolbar,
    .form-footer,
    .output-header {
        grid-template-columns: 1fr;
        flex-direction: column;
        align-items: stretch;
    }

    .brand-lockup {
        align-items: center;
    }

    .swap-button {
        width: 100%;
        margin: -4px 0 2px;
    }

    .output-actions {
        width: 100%;
    }

    .utility-button,
    .primary-button {
        width: 100%;
    }
}