*, *::before, *::after {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    height: 100%;
    font-family: 'Segoe UI', Arial, sans-serif;
    color: #1a1a2e;
    background-color: #f0f2f5;
}

body {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ── Header ── */
#header {
    display: flex;
    align-items: center;
    padding: 0 1.5rem;
    background-color: #fff;
    border-bottom: 1px solid #e0e0e0;
    box-shadow: 0 1px 4px rgba(0,0,0,.06);
    justify-content: space-between;
    height: 64px;
    position: sticky;
    top: 0;
    z-index: 100;
}

#header img.logo {
    height: 40px;
    width: auto;
}

#header .user-info,
#header .mb-3 {
    font-size: .875rem;
    color: #555;
    margin: 0;
}

#header .user-info a,
#header .mb-3 a {
    color: #4361ee;
    text-decoration: none;
}

#header select {
    font-size: .9rem;
    padding: 0.4rem 0.8rem;
    border: 1px solid #ddd;
    border-radius: 6px;
    background: #f9f9f9;
}

/* ── Layout ── */
#layout {
    flex: 1 1 auto;
    min-height: 0;
    display: flex;
}

#page {
    flex: 1;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    padding: 2rem;
}

#content {
    width: 100%;
    max-width: 1100px;
}

/* ── Login ── */
.login-card {
    width: 100%;
    max-width: 420px;
    background: #fff;
    border-radius: 12px;
    box-shadow: 0 4px 24px rgba(0,0,0,.09);
    padding: 2.5rem 2rem;
    margin: 3rem auto 0;
}

.login-logo {
    text-align: center;
    margin-bottom: 1.5rem;
}

.login-logo img {
    height: 48px;
    width: auto;
}

.login-title {
    font-size: 1.4rem;
    font-weight: 600;
    text-align: center;
    margin: 0 0 1.5rem;
    color: #1a1a2e;
}

.login-error {
    background: #fff0f0;
    border: 1px solid #f5c6c6;
    color: #c0392b;
    border-radius: 6px;
    padding: .65rem 1rem;
    font-size: .875rem;
    margin-bottom: 1.25rem;
}

.login-form .form-group {
    margin-bottom: 1.1rem;
}

.login-form label {
    display: block;
    font-size: .85rem;
    font-weight: 500;
    color: #444;
    margin-bottom: .35rem;
}

.login-form input[type="email"],
.login-form input[type="password"] {
    width: 100%;
    padding: .6rem .9rem;
    border: 1px solid #ddd;
    border-radius: 7px;
    font-size: .95rem;
    color: #1a1a2e;
    background: #fafafa;
    transition: border-color .15s, box-shadow .15s;
    outline: none;
}

.login-form input[type="email"]:focus,
.login-form input[type="password"]:focus {
    border-color: #4361ee;
    box-shadow: 0 0 0 3px rgba(67,97,238,.12);
    background: #fff;
}

.login-submit {
    width: 100%;
    padding: .7rem;
    font-size: 1rem;
    margin-top: .5rem;
    border-radius: 7px;
    justify-content: center;
}

/* ── Section headings ── */
#content h2 {
    font-size: 1.4rem;
    font-weight: 600;
    margin: 0 0 1.5rem;
    color: #1a1a2e;
}

/* ── Card ── */
.card {
    background: #fff;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0,0,0,.07);
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 1rem;
}

.card-title {
    font-size: 1rem;
    font-weight: 600;
    color: #1a1a2e;
    margin: 0;
}

/* ── Toolbar ── */
.toolbar {
    display: flex;
    align-items: center;
    gap: .75rem;
}

/* ── Button ── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: .4rem;
    padding: .45rem 1.1rem;
    font-size: .875rem;
    font-weight: 500;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    transition: background .15s, opacity .15s;
}

.btn-primary {
    background-color: #4361ee;
    color: #fff;
}

.btn-primary:hover:not(:disabled) {
    background-color: #3451d1;
}

.btn:disabled {
    opacity: .55;
    cursor: not-allowed;
}

/* ── Loading badge ── */
.loading-badge {
    display: none;
    align-items: center;
    gap: .4rem;
    font-size: .8rem;
    color: #888;
    padding: .3rem .7rem;
    background: #f0f2f5;
    border-radius: 20px;
}

.loading-badge.visible {
    display: inline-flex;
}

.spinner {
    width: 14px;
    height: 14px;
    border: 2px solid #ccc;
    border-top-color: #4361ee;
    border-radius: 50%;
    animation: spin .6s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

/* ── Tables ── */
table {
    border-collapse: collapse;
    width: 100%;
    font-size: .9rem;
}

table thead tr {
    background-color: #1a1a2e;
    color: #fff;
}

table th {
    padding: .75rem 1rem;
    text-align: left;
    font-weight: 500;
    letter-spacing: .02em;
    white-space: nowrap;
}

table td {
    padding: .65rem 1rem;
    border-bottom: 1px solid #f0f0f0;
    color: #333;
}

table tbody tr:last-child td {
    border-bottom: none;
}

table tbody tr:hover td {
    background-color: #f7f8ff;
}

/* ── Toggle switch ── */
.switch {
    position: relative;
    display: inline-block;
    width: 46px;
    height: 24px;
}

.switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background-color: #ccc;
    transition: .3s;
    border-radius: 24px;
}

.slider:before {
    position: absolute;
    content: "";
    height: 18px;
    width: 18px;
    left: 3px;
    bottom: 3px;
    background-color: #fff;
    transition: .3s;
    border-radius: 50%;
}

input:checked + .slider {
    background-color: #4CAF50;
}

input:checked + .slider:before {
    transform: translateX(22px);
}

input:disabled + .slider {
    opacity: .5;
    cursor: not-allowed;
}