/* Sig Tau Dues Portal - brand palette from the Sig Tau Foundation logo */
:root {
    --navy: #1f2a56;
    --navy-dark: #16203f;
    --blue: #3a5a9b;
    --light-blue: #7fb2e5;
    --bg: #f4f6fa;
    --surface: #ffffff;
    --text: #22283b;
    --muted: #6b7387;
    --border: #dbe1ec;
    --success: #1e7d43;
    --success-bg: #e3f4ea;
    --danger: #b3372f;
    --danger-bg: #fbeae8;
    --warn-bg: #fff6e0;
    --warn-border: #e5c56b;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

main {
    flex: 1;
    width: 100%;
    max-width: 1040px;
    margin: 0 auto;
    padding: 1.5rem 1rem 3rem;
}

h1, h2, h3 {
    color: var(--navy);
    letter-spacing: 0.01em;
}

h1 {
    font-size: 1.7rem;
    text-transform: uppercase;
}

a {
    color: var(--blue);
}

.muted {
    color: var(--muted);
}

/* ---------- Navigation ---------- */
.top-nav {
    background: var(--navy);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.6rem 1.25rem;
    box-shadow: 0 2px 6px rgba(22, 32, 63, 0.25);
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.7rem;
    text-decoration: none;
}

.nav-logo img {
    background: #fff;
    border-radius: 8px;
    padding: 3px;
}

.nav-title {
    color: #fff;
    font-weight: 800;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 1.05rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.1rem;
}

.nav-links a {
    color: var(--light-blue);
    text-decoration: none;
    font-weight: 600;
}

.nav-links a:hover {
    color: #fff;
}

.link-button {
    background: none;
    border: none;
    color: var(--light-blue);
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    padding: 0;
}

.link-button:hover {
    color: #fff;
}

.auth-alt .link-button,
.auth-alt a {
    color: var(--blue);
}

/* ---------- Footer ---------- */
.site-footer {
    background: var(--navy-dark);
    color: var(--light-blue);
    text-align: center;
    font-size: 0.85rem;
    padding: 0.75rem 1rem;
}

.site-footer p {
    margin: 0;
}

/* ---------- Auth cards ---------- */
.auth-card {
    background: var(--surface);
    max-width: 430px;
    margin: 2.5rem auto;
    padding: 2rem 2.25rem;
    border-radius: 12px;
    border-top: 5px solid var(--navy);
    box-shadow: 0 6px 24px rgba(31, 42, 86, 0.12);
}

.auth-card h1 {
    margin-top: 0;
    font-size: 1.4rem;
}

.auth-note {
    color: var(--muted);
    font-size: 0.92rem;
}

.auth-card form {
    display: flex;
    flex-direction: column;
    gap: 0.9rem;
}

.auth-card label {
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--navy);
}

.auth-card input,
.inline-form input,
.data-table select {
    padding: 0.55rem 0.7rem;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    background: #fff;
    color: var(--text);
}

.auth-card input:focus,
.inline-form input:focus {
    outline: 2px solid var(--light-blue);
    border-color: var(--blue);
}

.auth-alt {
    margin-top: 1rem;
    font-size: 0.9rem;
    text-align: center;
}

/* ---------- Buttons ---------- */
.btn-primary {
    display: inline-block;
    background: var(--navy);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 0.65rem 1.3rem;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    text-decoration: none;
    text-align: center;
    transition: background 0.15s ease;
}

.btn-primary:hover:not(:disabled) {
    background: var(--blue);
}

.btn-primary:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-danger {
    background: var(--danger);
    color: #fff;
    border: none;
    border-radius: 8px;
    padding: 0.65rem 1.3rem;
    font-weight: 700;
    cursor: pointer;
}

.btn-danger:hover {
    background: #922b24;
}

.btn-small {
    padding: 0.4rem 0.85rem;
    font-size: 0.88rem;
}

/* ---------- Messages ---------- */
.form-error {
    background: var(--danger-bg);
    color: var(--danger);
    border: 1px solid var(--danger);
    border-radius: 8px;
    padding: 0.6rem 0.8rem;
    font-size: 0.9rem;
}

.form-notice {
    background: var(--success-bg);
    color: var(--success);
    border: 1px solid var(--success);
    border-radius: 8px;
    padding: 0.6rem 0.8rem;
    font-size: 0.9rem;
}

.banner {
    border-radius: 10px;
    padding: 1rem 1.2rem;
    margin: 1.25rem 0;
}

.banner-pending {
    background: var(--warn-bg);
    border: 1px solid var(--warn-border);
}

.banner-rejected {
    background: var(--danger-bg);
    border: 1px solid var(--danger);
}

/* ---------- Dues cards ---------- */
.period-cards {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.period-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-top: 4px solid var(--blue);
    border-radius: 10px;
    padding: 1.1rem 1.3rem;
    min-width: 220px;
    box-shadow: 0 3px 12px rgba(31, 42, 86, 0.08);
}

.period-card.paid {
    border-top-color: var(--success);
}

.period-card h3 {
    margin: 0 0 0.4rem;
}

.period-card .amount {
    font-size: 1.6rem;
    font-weight: 800;
    color: var(--navy);
    margin: 0.2rem 0;
}

.chip {
    display: inline-block;
    border-radius: 999px;
    padding: 0.25rem 0.9rem;
    font-size: 0.85rem;
    font-weight: 700;
}

.chip-paid {
    background: var(--success-bg);
    color: var(--success);
}

/* ---------- Tables ---------- */
.data-table {
    width: 100%;
    border-collapse: collapse;
    background: var(--surface);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 2px 10px rgba(31, 42, 86, 0.07);
    margin: 0.75rem 0 1.5rem;
}

.data-table th {
    background: var(--navy);
    color: #fff;
    text-align: left;
    padding: 0.6rem 0.9rem;
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.04em;
}

.data-table td {
    padding: 0.6rem 0.9rem;
    border-top: 1px solid var(--border);
    font-size: 0.95rem;
}

.data-table tr:nth-child(even) td {
    background: #f8fafd;
}

.data-table .actions {
    display: flex;
    gap: 0.5rem;
}

/* ---------- Admin ---------- */
.tabs {
    display: flex;
    gap: 0.4rem;
    border-bottom: 2px solid var(--border);
    margin-bottom: 1.25rem;
}

.tabs button {
    background: none;
    border: none;
    border-bottom: 3px solid transparent;
    padding: 0.55rem 1.1rem;
    font-size: 1rem;
    font-weight: 700;
    color: var(--muted);
    cursor: pointer;
}

.tabs button.active {
    color: var(--navy);
    border-bottom-color: var(--blue);
}

.stat-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.stat-card {
    background: var(--navy);
    color: #fff;
    border-radius: 10px;
    padding: 1rem 1.5rem;
    min-width: 180px;
    display: flex;
    flex-direction: column;
}

.stat-value {
    font-size: 1.8rem;
    font-weight: 800;
}

.stat-label {
    color: var(--light-blue);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.report-period h3 {
    margin-bottom: 0.4rem;
}

.setup-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

@media (max-width: 760px) {
    .setup-grid {
        grid-template-columns: 1fr;
    }
}

.inline-form {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 0.75rem;
}

.inline-form input {
    flex: 1;
    min-width: 130px;
}

.plain-list {
    list-style: none;
    padding: 0;
    margin: 0.5rem 0;
}

.plain-list li {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 0.5rem 0.9rem;
    margin-bottom: 0.4rem;
    font-weight: 600;
    color: var(--navy);
}

/* ---------- Payment result ---------- */
.result-card {
    text-align: center;
}

.result-icon {
    width: 64px;
    height: 64px;
    line-height: 64px;
    border-radius: 50%;
    margin: 0 auto 1rem;
    font-size: 2rem;
    font-weight: 800;
    color: #fff;
}

.result-icon.success {
    background: var(--success);
}

.result-icon.cancel {
    background: var(--danger);
}

.not-found {
    text-align: center;
    color: var(--muted);
    margin-top: 3rem;
}

.page > h1 {
    border-bottom: 3px solid var(--light-blue);
    display: inline-block;
    padding-bottom: 0.25rem;
}