/* === Reset & Base === */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans KR", sans-serif;
    background-color: #f0f4f8;
    color: #2d3748;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* === Navigation === */
nav {
    background: linear-gradient(135deg, #1a56db 0%, #1e429f 100%);
    color: #fff;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 56px;
    box-shadow: 0 2px 8px rgba(26, 86, 219, 0.3);
}

nav .nav-brand {
    font-size: 1.2rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    color: #fff;
    text-decoration: none;
}

nav .nav-links {
    display: flex;
    gap: 0.25rem;
    list-style: none;
}

nav .nav-links a {
    color: rgba(255, 255, 255, 0.9);
    text-decoration: none;
    padding: 0.4rem 0.85rem;
    border-radius: 6px;
    font-size: 0.9rem;
    transition: background 0.15s;
}

nav .nav-links a:hover {
    background: rgba(255, 255, 255, 0.15);
    color: #fff;
}

nav .nav-links .logout-btn {
    background: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.25);
    cursor: pointer;
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.9);
    padding: 0.4rem 0.85rem;
    border-radius: 6px;
    transition: background 0.15s;
}

nav .nav-links .logout-btn:hover {
    background: rgba(255, 255, 255, 0.25);
}

/* === Main Content === */
main {
    flex: 1;
    padding: 2rem 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
}

.container {
    width: 100%;
    max-width: 640px;
}

/* === Cards === */
.card {
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 1px 4px rgba(0, 0, 0, 0.08), 0 4px 16px rgba(0, 0, 0, 0.06);
    padding: 2rem;
    margin-bottom: 1.5rem;
}

.card-title {
    font-size: 1.15rem;
    font-weight: 700;
    color: #1a56db;
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 2px solid #e8f0fe;
}

/* === Forms === */
.form-group {
    margin-bottom: 1.1rem;
}

label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: #4a5568;
    margin-bottom: 0.4rem;
}

input[type="text"],
input[type="password"],
input[type="date"],
input[type="time"],
input[type="number"],
input[type="url"],
select,
textarea {
    width: 100%;
    padding: 0.6rem 0.9rem;
    border: 1.5px solid #cbd5e0;
    border-radius: 8px;
    font-size: 0.95rem;
    color: #2d3748;
    background: #fff;
    transition: border-color 0.15s, box-shadow 0.15s;
    outline: none;
    appearance: none;
}

input:focus,
select:focus,
textarea:focus {
    border-color: #1a56db;
    box-shadow: 0 0 0 3px rgba(26, 86, 219, 0.12);
}

/* === Buttons === */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.65rem 1.4rem;
    border: none;
    border-radius: 8px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s, transform 0.1s, box-shadow 0.15s;
}

.btn:active {
    transform: translateY(1px);
}

.btn-primary {
    background: linear-gradient(135deg, #1a56db, #1e429f);
    color: #fff;
    box-shadow: 0 2px 6px rgba(26, 86, 219, 0.35);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #1e429f, #1a3a8f);
    box-shadow: 0 4px 10px rgba(26, 86, 219, 0.45);
}

.btn-secondary {
    background: #e8f0fe;
    color: #1a56db;
}

.btn-secondary:hover {
    background: #d1e3fc;
}

.btn-danger {
    background: #fff5f5;
    color: #c53030;
    border: 1.5px solid #feb2b2;
}

.btn-danger:hover {
    background: #fed7d7;
}

.btn-full {
    width: 100%;
}

/* === Alert / Error Messages === */
.alert {
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    margin-bottom: 1rem;
}

.alert-error {
    background: #fff5f5;
    color: #c53030;
    border: 1px solid #feb2b2;
}

.alert-success {
    background: #f0fff4;
    color: #276749;
    border: 1px solid #9ae6b4;
}

.alert-info {
    background: #ebf8ff;
    color: #2b6cb0;
    border: 1px solid #90cdf4;
}

.alert-warning {
    background: #fffbeb;
    color: #b7791f;
    border: 1px solid #fcd34d;
}

/* === Status Indicators === */
.status-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    padding: 0.25rem 0.7rem;
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 600;
}

.status-badge::before {
    content: "";
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: currentColor;
    opacity: 0.7;
}

.status-running {
    background: #f0fff4;
    color: #276749;
}

.status-stopped {
    background: #fff5f5;
    color: #c53030;
}

.status-waiting {
    background: #fffbeb;
    color: #b7791f;
}

/* === Login Page === */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #1a56db 0%, #1e429f 60%, #1a3a8f 100%);
    padding: 1rem;
}

.login-card {
    background: #fff;
    border-radius: 16px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.18);
    padding: 2.5rem 2rem;
    width: 100%;
    max-width: 400px;
}

.login-logo {
    text-align: center;
    margin-bottom: 1.75rem;
}

.login-logo h1 {
    font-size: 1.5rem;
    font-weight: 800;
    color: #1a56db;
    letter-spacing: -0.5px;
}

.login-logo p {
    font-size: 0.85rem;
    color: #718096;
    margin-top: 0.35rem;
}

/* === Footer === */
footer {
    text-align: center;
    padding: 1rem;
    font-size: 0.8rem;
    color: #a0aec0;
}

/* === Responsive === */
@media (max-width: 600px) {
    nav {
        padding: 0 1rem;
    }

    nav .nav-brand {
        font-size: 1rem;
    }

    nav .nav-links a,
    nav .nav-links .logout-btn {
        padding: 0.35rem 0.6rem;
        font-size: 0.82rem;
    }

    .card {
        padding: 1.25rem;
    }

    .login-card {
        padding: 2rem 1.25rem;
    }
}