:root {
    --ops-bg: #f6f7f9;
    --ops-panel: #ffffff;
    --ops-ink: #1b1f24;
    --ops-muted: #68707c;
    --ops-line: #dfe3e8;
    --ops-accent: #0f766e;
    --ops-accent-hover: #115e59;
    --ops-radius: 8px;
    --ops-shadow: 0 8px 24px rgba(27, 31, 36, 0.08);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    min-height: 100vh;
    background: var(--ops-bg);
    color: var(--ops-ink);
    font-family: Inter, -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    line-height: 1.5;
}

a {
    color: var(--ops-accent);
}

.ops-shell {
    display: grid;
    grid-template-columns: 240px minmax(0, 1fr);
    min-height: 100vh;
}

.ops-sidebar {
    position: sticky;
    top: 0;
    height: 100vh;
    display: flex;
    flex-direction: column;
    gap: 24px;
    border-right: 1px solid var(--ops-line);
    background: #111827;
    padding: 20px;
    color: #f9fafb;
}

.ops-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    color: #f9fafb;
    text-decoration: none;
}

.ops-brand-mark {
    display: grid;
    width: 40px;
    height: 40px;
    place-items: center;
    border-radius: var(--ops-radius);
    background: var(--ops-accent);
    color: white;
    font-weight: 700;
}

.ops-brand strong,
.ops-brand small {
    display: block;
}

.ops-brand small {
    color: #a8b0bd;
    font-size: 0.78rem;
    font-weight: 500;
}

.ops-nav {
    display: grid;
    gap: 6px;
}

.ops-nav a {
    border-radius: var(--ops-radius);
    color: #cbd5e1;
    font-weight: 600;
    padding: 10px 12px;
    text-decoration: none;
}

.ops-nav a:hover,
.ops-nav a.active {
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
}

.ops-user {
    margin-top: auto;
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    padding-top: 16px;
    color: #a8b0bd;
    font-size: 0.9rem;
}

.ops-user span,
.ops-user a {
    display: block;
}

.ops-user a {
    margin-top: 6px;
    color: #ffffff;
    text-decoration: none;
}

.ops-main {
    min-width: 0;
    padding: 32px;
}

.ops-page-header {
    align-items: center;
    display: flex;
    justify-content: space-between;
    margin: 0 auto 24px;
    max-width: 1180px;
}

.ops-page-header h1 {
    font-size: 2rem;
    line-height: 1.15;
    margin: 0;
}

.ops-page-header p {
    color: var(--ops-muted);
    margin: 6px 0 0;
}

.ops-content {
    margin: 0 auto;
    max-width: 1180px;
}

.ops-panel,
.card {
    background: var(--ops-panel);
    border: 1px solid var(--ops-line);
    border-radius: var(--ops-radius);
    box-shadow: var(--ops-shadow);
}

.ops-panel {
    padding: 24px;
}

.ops-grid {
    display: grid;
    gap: 16px;
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.ops-tool-link {
    display: block;
    padding: 22px;
    text-decoration: none;
}

.ops-tool-link h2 {
    color: var(--ops-ink);
    font-size: 1.15rem;
    margin: 0 0 6px;
}

.ops-tool-link p {
    color: var(--ops-muted);
    margin: 0;
}

.ops-alert {
    border-left: 4px solid var(--ops-accent);
    color: var(--ops-muted);
    margin-bottom: 18px;
    padding: 12px 14px;
}

.ops-alert.error {
    border-left-color: #dc2626;
    color: #991b1b;
}

.ops-form {
    display: grid;
    gap: 18px;
}

.ops-field {
    display: grid;
    gap: 7px;
}

.ops-field label {
    color: var(--ops-ink);
    font-weight: 600;
}

.ops-input,
.ops-select,
.ops-textarea,
input[type="text"],
input[type="password"],
input[type="date"],
input[type="number"],
textarea,
select {
    width: 100%;
    border: 1px solid var(--ops-line);
    border-radius: var(--ops-radius);
    color: var(--ops-ink);
    font: inherit;
    padding: 11px 12px;
}

.ops-textarea,
textarea {
    min-height: 210px;
    resize: vertical;
}

.ops-button,
button,
input[type="submit"],
.btn {
    align-items: center;
    background: var(--ops-accent);
    border: 0;
    border-radius: var(--ops-radius);
    color: #ffffff;
    cursor: pointer;
    display: inline-flex;
    font: inherit;
    font-weight: 700;
    justify-content: center;
    min-height: 44px;
    padding: 10px 16px;
    text-decoration: none;
}

.ops-button:hover,
button:hover,
input[type="submit"]:hover,
.btn:hover {
    background: var(--ops-accent-hover);
    color: #ffffff;
}

.ops-login {
    display: grid;
    min-height: 100vh;
    place-items: center;
    padding: 24px;
}

.ops-login-card {
    max-width: 420px;
    width: 100%;
}

.ops-login-card h1 {
    margin: 0 0 6px;
}

.ops-login-card p {
    color: var(--ops-muted);
    margin: 0 0 22px;
}

@media (max-width: 820px) {
    .ops-shell {
        grid-template-columns: 1fr;
    }

    .ops-sidebar {
        position: static;
        height: auto;
        gap: 14px;
    }

    .ops-nav {
        grid-template-columns: repeat(4, minmax(0, 1fr));
    }

    .ops-nav a {
        text-align: center;
    }

    .ops-main {
        padding: 20px;
    }

    .ops-grid {
        grid-template-columns: 1fr;
    }
}