:root {
    --bg: #0d1117;
    --card: #161b22;
    --text: #e6edf3;
    --muted: #8b949e;
    --accent: #58a6ff;
    --accent2: #1f6feb;
    --border: #263041;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Inter, system-ui, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    padding: 20px;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
    overflow-x: hidden;
}

.container {
    text-align: center;
    width: 100%;
    max-width: 1100px;
    position: relative;
}

h1 {
    font-size: clamp(2rem, 5vw, 3rem);
    margin: 0 0 10px;
    font-weight: 800;
    color: var(--text);
}

.page-subtitle {
    margin: 0 0 24px;
    color: var(--muted);
    font-size: 0.95rem;
}

.mode-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 14px;
    margin-bottom: 14px;
}

.main-grid {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 14px;
}

.card {
    background: var(--card);
    border-radius: 14px;
    overflow: hidden;
    transition: border-color 0.2s ease;
    box-shadow: 0 2px 0 rgba(255, 255, 255, 0.03) inset;
    border: 1px solid var(--border);
    text-align: left;
}

.card:hover {
    border-color: var(--accent2);
}

.mode-card,
.action-button,
select,
input[type="range"] {
    font-family: inherit;
}

.mode-card {
    background: var(--card);
    color: var(--text);
    border-radius: 14px;
    border: 1px solid var(--border);
    box-shadow: 0 2px 0 rgba(255, 255, 255, 0.03) inset;
    padding: 18px 14px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: border-color 0.2s ease;
}

.mode-card:hover,
.mode-card.active {
    border-color: var(--accent);
    background: #0f1a2b;
}

.controls-card,
.output-card {
    padding: 24px;
}

.card h2 {
    margin: 0 0 22px;
    font-size: 1.3rem;
    font-weight: 700;
    color: var(--text);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: 18px;
}

.mode-panel {
    display: none;
}

.mode-panel.active {
    display: flex;
}

.control-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 18px;
    padding: 0 0 18px;
    border-bottom: 1px solid var(--border);
}

.control-row:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.control-row label {
    font-size: 1rem;
    color: var(--text);
}

.inline-control {
    display: flex;
    align-items: center;
    gap: 14px;
    min-width: 330px;
    justify-content: flex-end;
}

.value-pill {
    min-width: 54px;
    text-align: center;
    border-radius: 10px;
    padding: 8px 14px;
    border: 1px solid var(--border);
    background: #0f1520;
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
}

select {
    min-width: 180px;
    background: #0f1520;
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 9px 12px;
    font-size: 0.9rem;
}

select:hover {
    border-color: var(--accent2);
}

select option {
    color: var(--text);
    background: var(--card);
}

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

.toggle-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 14px;
}

.single-toggle-grid {
    grid-template-columns: 1fr;
}

.toggle-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 14px 16px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: #0f1520;
    cursor: pointer;
    transition: border-color 0.2s ease;
}

.toggle-card:hover {
    border-color: var(--accent2);
}

.toggle-card span {
    font-size: 0.9rem;
    font-weight: 400;
    color: var(--text);
}

.toggle-card input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--accent);
}

.password-output {
    min-height: 130px;
    border-radius: 10px;
    background: #0f1520;
    border: 1px solid var(--border);
    padding: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    font-size: clamp(1.3rem, 3vw, 2.2rem);
    font-weight: 700;
    line-height: 1.35;
    letter-spacing: 0.02em;
    word-break: break-word;
    margin-bottom: 14px;
    color: var(--text);
}

.strength-block {
    margin-bottom: 14px;
}

.strength-line {
    display: flex;
    justify-content: space-between;
    margin-bottom: 8px;
    color: var(--muted);
    font-size: 0.9rem;
}

.strength-bar-bg {
    width: 100%;
    height: 8px;
    border-radius: 999px;
    background: var(--border);
    overflow: hidden;
}

.strength-bar {
    height: 100%;
    width: 0;
    border-radius: 999px;
    background: var(--accent);
    transition: width 0.3s ease;
}

.button-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    margin-bottom: 14px;
}

.action-button {
    border-radius: 10px;
    padding: 9px 14px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    text-align: center;
    text-decoration: none;
    transition: border-color 0.2s ease;
    border: 1px solid var(--border);
    background: #0f1520;
    color: var(--text);
}

.action-button:hover {
    border-color: var(--accent2);
}

.primary-button {
    border-color: var(--accent);
    background: #0f1a2b;
}

.secondary-button {
    border-color: var(--border);
    background: #0f1520;
}

.info-box,
.resource-status {
    border-radius: 10px;
    background: #0f1520;
    border: 1px solid var(--border);
    padding: 14px 16px;
    color: var(--muted);
    line-height: 1.55;
    font-size: 0.9rem;
}

.info-box strong {
    color: var(--text);
}

.info-box span {
    color: var(--accent);
    font-weight: 600;
}

.resource-status {
    margin-top: 10px;
    font-size: 0.88rem;
}

.home-button {
    position: fixed;
    top: 14px;
    left: 14px;
    text-decoration: none;
    color: var(--muted);
    font-size: 0.85rem;
    font-weight: 600;
    padding: 7px 12px;
    border: 1px solid var(--border);
    border-radius: 10px;
    background: var(--card);
    transition: color 0.2s ease, border-color 0.2s ease;
    z-index: 100;
}

.home-button:hover {
    color: var(--accent);
    border-color: var(--accent2);
}

.hidden {
    display: none !important;
}

@media (max-width: 900px) {
    .main-grid {
        grid-template-columns: 1fr;
    }

    .mode-grid,
    .button-row,
    .toggle-grid {
        grid-template-columns: 1fr;
    }

    .control-row {
        flex-direction: column;
        align-items: stretch;
    }

    .inline-control {
        min-width: 0;
        width: 100%;
    }
}