* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --ko-red: #8b0000;
    --ko-red-light: #a52a2a;
    --ko-gold: #c9a227;
    --ko-gold-light: #d4af37;
    --ko-dark: #0a0a0a;
    --ko-dark-red: #1a0505;
    --ko-text: #e8e8e8;
    --ko-text-muted: #a0a0a0;
}

body {
    font-family: 'Crimson Text', Georgia, serif;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    position: relative;
    overflow-x: hidden;

    /* Knight Online themed background */
    background: var(--ko-dark);
    background-image:
        url('https://wallup.net/wp-content/uploads/2018/09/29/640875-knight-online-fantasy-mmo-rpg-action-fighting-adventure-1knight-warrior-armor-poster.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.bg-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        135deg,
        rgba(10, 0, 0, 0.85) 0%,
        rgba(26, 5, 5, 0.80) 50%,
        rgba(10, 0, 0, 0.85) 100%
    );
    z-index: 0;
}

.container {
    width: 100%;
    max-width: 420px;
    position: relative;
    z-index: 1;
}

.card {
    background: linear-gradient(
        180deg,
        rgba(20, 10, 10, 0.95) 0%,
        rgba(15, 5, 5, 0.98) 100%
    );
    border-radius: 4px;
    padding: 40px;
    box-shadow:
        0 0 0 1px var(--ko-red),
        0 0 30px rgba(139, 0, 0, 0.3),
        0 20px 60px rgba(0, 0, 0, 0.5);
    border: 1px solid rgba(139, 0, 0, 0.5);
}

/* Decorative corners */
.card::before,
.card::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border-color: var(--ko-gold);
    border-style: solid;
}

.card::before {
    top: -1px;
    left: -1px;
    border-width: 2px 0 0 2px;
}

.card::after {
    bottom: -1px;
    right: -1px;
    border-width: 0 2px 2px 0;
}

.header {
    text-align: center;
    margin-bottom: 32px;
}

.logo {
    width: 80px;
    height: auto;
    margin-bottom: 16px;
    filter: drop-shadow(0 0 10px rgba(139, 0, 0, 0.5));
}

.logo-text {
    font-family: 'Cinzel', serif;
    font-size: 24px;
    font-weight: 700;
    font-style: italic;
    color: var(--ko-gold);
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 2px;
    text-shadow:
        0 0 10px rgba(201, 162, 39, 0.3),
        2px 2px 4px rgba(0, 0, 0, 0.5);
}

.header h1 {
    font-family: 'Cinzel', serif;
    font-size: 32px;
    font-weight: 700;
    color: var(--ko-gold);
    margin-bottom: 8px;
    text-transform: uppercase;
    letter-spacing: 3px;
    text-shadow:
        0 0 10px rgba(201, 162, 39, 0.3),
        2px 2px 4px rgba(0, 0, 0, 0.5);
}

.subtitle {
    font-family: 'Cinzel', serif;
    color: var(--ko-text-muted);
    font-size: 14px;
    letter-spacing: 2px;
    text-transform: uppercase;
}

.form-group {
    margin-bottom: 24px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-family: 'Cinzel', serif;
    font-weight: 600;
    color: var(--ko-gold-light);
    font-size: 13px;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.form-group input {
    width: 100%;
    padding: 14px 16px;
    background: rgba(0, 0, 0, 0.6);
    border: 1px solid rgba(139, 0, 0, 0.5);
    border-radius: 2px;
    font-size: 16px;
    font-family: 'Crimson Text', Georgia, serif;
    color: var(--ko-text);
    transition: all 0.2s ease;
}

.form-group input::placeholder {
    color: rgba(160, 160, 160, 0.5);
}

.form-group input:focus {
    outline: none;
    border-color: var(--ko-gold);
    background: rgba(0, 0, 0, 0.8);
    box-shadow:
        0 0 0 1px var(--ko-gold),
        0 0 15px rgba(201, 162, 39, 0.2);
}

.form-group input:invalid:not(:placeholder-shown) {
    border-color: var(--ko-red-light);
}

.form-group .hint {
    display: block;
    margin-top: 6px;
    font-size: 12px;
    color: var(--ko-text-muted);
}

button[type="submit"] {
    width: 100%;
    padding: 16px;
    background: linear-gradient(
        180deg,
        var(--ko-red) 0%,
        #5c0000 100%
    );
    color: var(--ko-gold-light);
    border: 1px solid var(--ko-gold);
    border-radius: 2px;
    font-family: 'Cinzel', serif;
    font-size: 14px;
    font-weight: 600;
    letter-spacing: 2px;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.2s ease;
    text-shadow: 1px 1px 2px rgba(0, 0, 0, 0.5);
}

button[type="submit"]:hover {
    background: linear-gradient(
        180deg,
        var(--ko-red-light) 0%,
        var(--ko-red) 100%
    );
    box-shadow:
        0 0 20px rgba(139, 0, 0, 0.5),
        0 0 30px rgba(201, 162, 39, 0.2);
    transform: translateY(-1px);
}

button[type="submit"]:active {
    transform: translateY(0);
}

button[type="submit"]:disabled {
    background: #333;
    border-color: #555;
    color: #777;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.message {
    margin-top: 24px;
    padding: 16px;
    border-radius: 2px;
    text-align: center;
    font-size: 14px;
    font-weight: 500;
}

.message.success {
    background: rgba(0, 100, 0, 0.3);
    color: #90EE90;
    border: 1px solid rgba(0, 128, 0, 0.5);
}

.message.error {
    background: rgba(100, 0, 0, 0.3);
    color: #ffaaaa;
    border: 1px solid rgba(139, 0, 0, 0.5);
}

.divider {
    height: 1px;
    background: linear-gradient(
        90deg,
        transparent,
        var(--ko-red),
        transparent
    );
    margin: 24px 0;
}

.footer-links {
    text-align: center;
    color: var(--ko-text-muted);
    font-size: 13px;
}

.footer-links a {
    color: var(--ko-gold);
    text-decoration: none;
}

.footer-links a:hover {
    text-decoration: underline;
}

.page-footer {
    text-align: center;
    margin-top: 24px;
    color: rgba(160, 160, 160, 0.5);
    font-size: 12px;
}

/* Responsive */
@media (max-width: 480px) {
    .card {
        padding: 24px;
    }

    .header h1 {
        font-size: 24px;
        letter-spacing: 2px;
    }

    .logo {
        width: 60px;
    }
}

/* Loading animation */
@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.btn-loading {
    animation: pulse 1.5s ease-in-out infinite;
}