:root {
    color-scheme: dark light;
    --bg-start: #3f6212;
    --bg-mid: #0f172a;
    --bg-end: #020617;
    --panel-bg: rgba(2, 6, 23, 0.72);
    --panel-border: rgba(255, 255, 255, 0.12);
    --card-bg: rgba(255, 255, 255, 0.06);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-main: #f8fafc;
    --text-muted: #d4d4d8;
    --accent: #3e6800;
    --accent-strong: #4e7e00;
    --accent-text: #020617;
    --result-bg: rgba(15, 23, 42, 0.82);
    --result-border: rgba(255, 255, 255, 0.08);
    --shadow-strong: 0 24px 80px rgba(2, 6, 23, 0.45);
    --shadow-soft: 0 12px 40px rgba(15, 23, 42, 0.25);
    --error-bg: rgba(127, 29, 29, 0.16);
    --error-border: rgba(248, 113, 113, 0.32);
    --error-text: #fca5a5;
    --focus-ring: rgba(132, 204, 22, 0.28);
    --font-sans: "Segoe UI", "Helvetica Neue", Helvetica, Arial, sans-serif;
}

* {
    box-sizing: border-box;
}

html {
    font-size: 17px;
}

html,
body {
    height: 100%;
}

body {
    margin: 0;
    min-height: 100dvh;
    font-family: var(--font-sans);
    color: var(--text-main);
    background:
        radial-gradient(circle at top, var(--bg-start), var(--bg-mid) 45%, var(--bg-end));
    display: flex;
    align-items: flex-start;
    justify-content: center;
    padding: 0.9rem 1rem 1rem;
    overflow: hidden;
}

.container {
    width: min(calc(100% - 1.5rem), 24rem);
    max-height: calc(100dvh - 2rem);
    margin: 0.25rem 0 0;
    padding: 1.25rem;
    border: 1px solid var(--panel-border);
    border-radius: 10px;
    background: var(--panel-bg);
    box-shadow: var(--shadow-strong);
    backdrop-filter: blur(18px);
    overflow: auto;
}

.header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.title {
    margin: 0;
    font-size: clamp(2rem, 6vw, 2.6rem);
    font-weight: 900;
    letter-spacing: -0.04em;
    line-height: 0.95;
}

.btn {
    appearance: none;
    border: 0;
    border-radius: 10px;
    padding: 0.7rem 0.9rem;
    background: var(--accent);
    color: #ffffff;
    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.18em;
    cursor: pointer;
    transition: background-color 160ms ease, transform 160ms ease;
}

.btn:hover {
    background: var(--accent-strong);
    transform: translateY(-1px);
}

.btn:focus-visible {
    outline: 3px solid var(--focus-ring);
    outline-offset: 2px;
}

.stack-layout {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.input-card {
    padding: 1rem;
    border: 1px solid var(--card-border);
    border-radius: 10px;
    background: var(--card-bg);
}

.card-title {
    margin: 0;
    font-size: 1.1rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.supporting-text {
    margin: 0.65rem 0 0;
    color: var(--text-muted);
    font-size: 0.95rem;
    line-height: 1.6;
}

.input-field {
    width: 100%;
    padding: 1rem;
    border: 1px solid var(--card-border);
    border-radius: 10px;
    background: rgba(15, 23, 42, 0.9);
    color: var(--text-main);
    font: inherit;
    font-size: 2rem;
    font-weight: 700;
    text-align: center;
    transition: border-color 160ms ease, box-shadow 160ms ease;
}

.input-field::placeholder {
    color: rgba(212, 212, 216, 0.55);
}

.input-field:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 4px var(--focus-ring);
}

.input-main {
    margin-top: 1rem;
}

.results-panel {
    min-height: 0;
}

.results-panel:empty {
    display: none;
}

.results-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.result-row {
    padding: 0.85rem 1rem;
    border: 1px solid var(--result-border);
    border-radius: 10px;
    background: var(--result-bg);
    box-shadow: var(--shadow-soft);
}

.result-label {
    margin: 0;
    color: #bef264;
    font-size: 0.72rem;
    font-weight: 900;
    letter-spacing: 0.18em;
    text-transform: uppercase;
}

.result-value {
    margin: 0.3rem 0 0;
    color: var(--text-main);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.4;
}

.error {
    padding: 0.85rem 1rem;
    border: 1px solid var(--error-border);
    border-radius: 10px;
    background: var(--error-bg);
    color: var(--error-text);
    font-size: 0.95rem;
    font-weight: 700;
}

@media (prefers-color-scheme: light) {
    :root {
        --bg-start: #bef264;
        --bg-mid: #f5f5f4;
        --bg-end: #e7e5e4;
        --panel-bg: rgba(255, 255, 255, 0.88);
        --panel-border: rgba(214, 211, 209, 0.9);
        --card-bg: rgba(255, 255, 255, 0.84);
        --card-border: rgba(214, 211, 209, 0.9);
        --text-main: #0f172a;
        --text-muted: #52525b;
        --result-bg: rgba(255, 255, 255, 0.86);
        --result-border: rgba(214, 211, 209, 0.9);
        --shadow-strong: 0 24px 80px rgba(120, 113, 108, 0.18);
        --shadow-soft: 0 12px 40px rgba(120, 113, 108, 0.12);
        --error-bg: rgba(254, 242, 242, 0.92);
        --error-border: rgba(248, 113, 113, 0.4);
        --error-text: #b91c1c;
        --focus-ring: rgba(101, 163, 13, 0.22);
    }

    .result-label {
        color: #4d7c0f;
    }

    .input-field {
        background: #ffffff;
    }
}

@media (max-width: 480px) {
    .container {
        width: min(calc(100% - 1rem), 24rem);
        padding: 1rem;
    }

    .header {
        align-items: center;
    }

    .input-field {
        font-size: 1.7rem;
    }

    .result-value {
        font-size: 0.96rem;
    }
}