/* Base Styles */
:root {
    --matrix-green: #0f0;
    --matrix-dark-green: #00cc00;
    --matrix-bright-green: #adff2f;
    --matrix-black: #000;
    --background-alpha: rgba(0, 0, 0, 0.85);
    --error-red: #ff4d4d;
    --success-green: #4dff4d;
    --font-family: 'Courier New', Courier, monospace;
}

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

body {
    background: var(--matrix-black);
    color: var(--matrix-green);
    font-family: var(--font-family);
    overflow: hidden; /* Prevent scrolling for the one-page layout */
    min-height: 100vh;
}

/* Interactive Background */
#matrix-background {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

/* --- Main Layout Structure --- */
.page-wrapper {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 1rem;
    width: 100%;
}

.main-content {
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: flex-start;
    gap: 2.5rem;
    width: 100%;
    max-width: 1000px;
}

/* --- Login Container & Form Styles --- */
.login-container {
    flex: 0 1 400px;
    max-width: 400px;
    background: var(--background-alpha);
    padding: 2rem;
    border-radius: 8px;
    text-align: center;
    border: 1px solid var(--matrix-green);
    box-shadow: 0 0 20px rgba(0, 255, 0, 0.2);
    backdrop-filter: blur(5px);
}

.login-container h1 {
    margin-bottom: 1.5rem;
    font-size: 1.8em;
    color: var(--matrix-green);
    text-shadow: 0 0 10px var(--matrix-green);
}

.login-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.input-group {
    margin-bottom: 1rem;
    text-align: left;
    position: relative;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--matrix-green);
    font-weight: bold;
    text-shadow: 0 0 5px var(--matrix-green);
}

.input-group input {
    width: 100%;
    padding: 0.75rem;
    border: 1px solid var(--matrix-green);
    border-radius: 4px;
    background: rgba(0, 0, 0, 0.7);
    color: var(--matrix-green);
    font-family: var(--font-family);
    transition: all 0.3s ease;
}

.input-group input:focus {
    outline: none;
    border-color: var(--matrix-dark-green);
    box-shadow: 0 0 10px rgba(0, 255, 0, 0.3);
    background: rgba(0, 255, 0, 0.1);
}

.password-toggle {
    position: absolute;
    right: 1rem;
    top: 2.75rem;
    background: none;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0;
    color: var(--matrix-green);
    opacity: 0.8;
    transition: opacity 0.3s;
}

.btn {
    width: 100%;
    padding: 0.75rem;
    background: var(--matrix-green);
    border: none;
    border-radius: 4px;
    color: var(--matrix-black);
    font-size: 1em;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: var(--font-family);
    font-weight: bold;
}

.btn:hover {
    background: var(--matrix-bright-green);
    box-shadow: 0 0 20px rgba(173, 255, 47, 0.6);
}

.alert {
    padding: 0.75rem;
    border-radius: 4px;
    margin-bottom: 1rem; /* Added margin for spacing */
    text-align: left;
    font-size: 0.9em;
}

.alert-error {
    background-color: rgba(255, 77, 77, 0.2);
    border: 1px solid var(--error-red);
    color: var(--error-red);
}

/* --- MODIFIED: Additional Links Section --- */
.additional-links {
    margin-top: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 0.8rem; /* Space between "forgot password" and register button */
}

.additional-links .forgot-password {
    text-align: left;
    font-size: 0.9em; /* Adjusted font size */
}

.additional-links .forgot-password a {
    color: var(--matrix-green);
    text-decoration: none;
    transition: color 0.3s ease, text-shadow 0.3s ease;
}

.additional-links .forgot-password a:hover {
    color: var(--matrix-bright-green);
    text-shadow: 0 0 10px var(--matrix-bright-green);
}

/* --- NEW: Register Button-like Link --- */
.register-button-link {
    display: block;
    width: 100%;
    padding: 0.6rem;
    border: 1px dashed var(--matrix-green);
    border-radius: 4px;
    text-align: center;
    text-decoration: none;
    transition: background-color 0.3s ease, border-style 0.3s ease;
}

.register-button-link:hover {
    background-color: rgba(0, 255, 0, 0.1);
    border-style: solid;
}

.register-button-link span {
    display: block;
    color: var(--matrix-green);
    transition: color 0.3s ease;
}

.register-button-link .line-1 {
    font-size: 0.8em;
    opacity: 0.8;
}

.register-button-link .line-2 {
    font-size: 0.9em;
    font-weight: bold;
}


/* --- Parent Portal Link (Slightly adjusted for new context) --- */
.parent-portal-link {
    margin-top: 1.5rem;
    padding-top: 1.5rem;
    border-top: 1px solid rgba(0, 255, 0, 0.2);
    text-align: center;
}

.parent-portal-link a {
    color: var(--matrix-bright-green);
    text-decoration: none;
    font-size: 0.9em;
    display: inline-block;
    padding: 0.5rem 0.8rem;
    border: 1px solid transparent;
    border-radius: 4px;
    transition: all 0.3s ease;
}

.parent-portal-link a .icon {
    display: inline-block;
    transition: transform 0.3s ease;
}

.parent-portal-link a:hover {
    background: rgba(173, 255, 47, 0.1);
    border-color: var(--matrix-bright-green);
    text-shadow: 0 0 8px var(--matrix-bright-green);
}

.parent-portal-link a:hover .icon {
    transform: translateY(-3px) scale(1.1);
}

/* --- Rankings Showcase --- */
.rankings-showcase {
    flex: 1 1 400px;
    max-width: 420px;
    display: flex;
    flex-direction: column;
    gap: 0.8rem;
}

.ranking-card {
    background: var(--background-alpha);
    border: 1px solid var(--matrix-green);
    border-radius: 8px;
    padding: 1rem;
    backdrop-filter: blur(5px);
    box-shadow: 0 0 15px rgba(0, 255, 0, 0.15);
    transition: box-shadow 0.3s ease, transform 0.3s ease;
}

.ranking-card:hover {
    box-shadow: 0 0 25px rgba(173, 255, 47, 0.5), 0 0 10px rgba(173, 255, 47, 0.3) inset;
    transform: translateY(-5px);
}

.ranking-card h2 {
    font-size: 1.2em;
    margin-bottom: 0.8rem;
    text-align: center;
    text-shadow: 0 0 8px var(--matrix-green);
}

.ranking-card ol {
    list-style: none;
    padding-left: 0;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
}

.ranking-card li {
    display: flex;
    align-items: center;
    padding: 0.3rem 0;
    border-bottom: 1px dashed rgba(0, 255, 0, 0.2);
    font-size: 0.85em;
}

.ranking-card li:last-child {
    border-bottom: none;
}

.ranking-card .rank-icon {
    font-weight: bold;
    color: var(--matrix-dark-green);
    flex-basis: 30px;
    flex-shrink: 0;
    text-align: center;
}

.ranking-card .player-name {
    text-align: left;
    margin-left: 0.8rem;
    margin-right: auto;
    overflow: hidden;
    text-overflow: ellipsis;
    white-space: nowrap;
}

.ranking-card .player-score {
    font-weight: bold;
    color: #fff;
    text-shadow: 0 0 5px var(--matrix-green);
    margin-left: 1rem;
    flex-shrink: 0;
}

/* --- Footer & Responsive --- */
.beian-info {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: var(--background-alpha);
    color: var(--matrix-green);
    text-align: center;
    padding: 0.5rem;
    font-size: 0.8em;
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 1rem;
    z-index: 10;
    border-top: 1px solid var(--matrix-green);
}

.beian-info a {
    color: var(--matrix-green);
    text-decoration: none;
    transition: color 0.3s ease;
}

.beian-info a:hover {
    color: var(--matrix-bright-green);
}

.beian-info .beian-icon {
    width: 16px;
    height: 16px;
    vertical-align: middle;
}

@media screen and (max-width: 900px) {
    body {
        overflow-y: auto;
    }
    .main-content {
        flex-direction: column;
        align-items: center;
    }
    .login-container, .rankings-showcase {
        width: 100%;
        max-width: 500px;
    }
    .page-wrapper {
        padding-bottom: 6rem;
    }
}

@media screen and (max-width: 480px) {
    .beian-info {
        flex-direction: column;
        gap: 0.5rem;
    }
}

:focus {
    outline: 2px solid var(--matrix-bright-green);
    outline-offset: 2px;
}

:focus:not(:focus-visible) {
    outline: none;
}