body {
    font-family: 'Inter', "Segoe UI", Roboto, Arial, sans-serif;
    margin: 0;
    padding: 0;
    background-color: #f8f9fa;
    color: #343a40;
    line-height: 1.65;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    width: 90%;
    max-width: 1140px;
    margin: 0 auto;
    padding: 0 15px;
}

.spbrp-header {
    background: #3e4a4f;
    color: #f8f9fa;
    padding: 15px 0;
}

.header-container {
    display: flex;
    align-items: center;
}

.logo-link {
    display: inline-block;
    margin-right: 30px;
}

.header-logo {
    height: 60px;
    width: auto;
    vertical-align: middle;
}

.header-nav ul {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    align-items: center;
}

.header-nav li {
    margin-right: 30px;
}
.header-nav li:last-child {
    margin-right: 0;
}

.header-nav a {
    text-decoration: none;
    color: #e9ecef;
    font-weight: 500;
    font-size: 1.05em;
    padding: 10px 0;
    transition: color 0.2s ease;
}

.header-nav a:hover,
.header-nav a.active {
    color: #ff7f0e;
}

.spbrp-main {
    padding: 40px 0;
    flex-grow: 1;
}

.donate-card, .contact-info {
    background: #ffffff;
    padding: 35px 40px;
    border-radius: 10px;
    box-shadow: 0 6px 18px rgba(52, 58, 64, 0.07);
    border: 1px solid #dee2e6;
}

.donate-header, .contact-card-header {
    text-align: center;
    margin-bottom: 30px;
}
.donate-header h2, .contact-card-header {
    color: #212529;
    margin-top: 0;
    font-size: 2em;
    font-weight: 600;
}

.reward-info {
    background-color: #e9ecef;
    border-left: 4px solid #ff7f0e;
    padding: 15px 20px;
    border-radius: 6px;
    font-size: 0.95em;
    color: #343a40;
    margin-top: 20px;
    text-align: left;
}
.reward-info strong {
    color: #d96d0c;
    font-weight: 600;
}

.payment-purpose {
    background-color: #fff3e0;
    border-left: 4px solid #ff7f0e;
    padding: 18px 20px;
    border-radius: 6px;
    font-size: 1em;
    color: #343a40;
    margin-bottom: 30px;
    text-align: left;
}
.payment-purpose p {
    margin-bottom: 10px;
}
.payment-purpose p:last-child {
    margin-bottom: 0;
}
.payment-purpose strong {
    color: #d96d0c;
    font-weight: 600;
}

.form-group {
    margin-bottom: 22px;
}
.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: #495057;
    font-size: 0.95em;
}
.form-group input[type="text"],
.form-group input[type="number"] {
    width: 100%;
    padding: 12px 15px;
    border: 1px solid #ced4da;
    border-radius: 6px;
    box-sizing: border-box;
    background-color: #f8f9fa;
    color: #343a40;
    font-size: 1em;
    font-family: inherit;
    transition: border-color 0.2s ease, box-shadow 0.2s ease;
}
.form-group input[type="text"]:focus,
.form-group input[type="number"]:focus {
    border-color: #ff7f0e;
    outline: none;
    box-shadow: 0 0 0 0.2rem rgba(255, 127, 14, 0.25);
}
.form-text.text-muted {
    font-size: 0.875em;
    color: #6c757d;
    display: block;
    margin-top: 6px;
}

.amount-presets {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-bottom: 18px;
}
.preset-amount-btn {
    background: #f1f3f5;
    color: #343a40;
    border: 1px solid #dee2e6;
    padding: 10px 16px;
    border-radius: 6px;
    cursor: pointer;
    font-weight: 500;
    font-size: 0.9em;
    flex-grow: 1;
    text-align: center;
    transition: all 0.2s ease;
}
.preset-amount-btn:hover {
    background-color: #e9ecef;
    border-color: #ced4da;
}
.preset-amount-btn.active {
    background: #ff7f0e;
    color: #ffffff;
    border-color: #e6730d;
    font-weight: 600;
}

.submit-btn, .styled-button-link {
    display: inline-block;
    width: 100%;
    background: #ff7f0e;
    color: #ffffff;
    border: none;
    padding: 13px 20px;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1.05em;
    font-weight: 600;
    text-align: center;
    text-decoration: none;
    transition: background-color 0.2s ease, transform 0.1s ease;
}
.submit-btn:hover, .styled-button-link:hover {
    background: #e6730d;
    transform: translateY(-1px);
}
.styled-button-link {
    width: auto;
    padding: 12px 28px;
}


.payment-info {
    margin-top: 30px;
    text-align: center;
    font-size: 0.875em;
    color: #6c757d;
}

.spbrp-footer {
    background: #343a40;
    color: #adb5bd;
    text-align: center;
    padding: 25px 0;
    margin-top: auto;
    font-size: 0.9em;
}
.spbrp-footer p {
    margin: 0;
}

.flash-messages-container {
    margin-bottom: 25px;
}
.flash-message {
    padding: 15px 20px;
    border-radius: 6px;
    margin-bottom: 15px;
    font-size: 0.95em;
    border: 1px solid transparent;
}
.flash-success {
    color: #0f5132;
    background-color: #d1e7dd;
    border-color: #badbcc;
}
.flash-error {
    color: #842029;
    background-color: #f8d7da;
    border-color: #f5c2c7;
}

.contact-info ul {
    list-style-type: none;
    padding-left: 0;
    margin-top: 25px;
}
.contact-info li {
    margin-bottom: 28px;
    font-size: 1em;
    line-height: 1.6;
}
.contact-info li strong {
    color: #343a40;
    display: block;
    margin-bottom: 6px;
    font-weight: 600;
    font-size: 1.05em;
}
.contact-info a {
    color: #ff7f0e;
    text-decoration: none;
    font-weight: 500;
    word-break: break-all;
}
.contact-info a:hover {
    color: #e6730d;
    text-decoration: underline;
}
.contact-info small {
    display: block;
    font-size: 0.9em;
    color: #6c757d;
    margin-top: 5px;
}
.contact-intro {
    text-align: left;
    margin-bottom: 35px;
    font-size: 1.05em;
    color: #495057;
    line-height: 1.7;
}