/* --- CSS Variables --- */
:root {
    /* New "Superman 2025" Light Theme */
    --primary-color: #f8f9fa;
    --secondary-color: #ffffff;
    --secondary-color-rgb: 255, 255, 255;
    --accent-color: #e9ecef;
    --text-color: #1a1a1a;
    --highlight-color: #00529b; /* Heroic Blue */
    --highlight-color-rgb: 0, 82, 155;
    --shadow-color-light: rgba(0, 0, 0, 0.05);
    --shadow-color-dark: rgba(0, 0, 0, 0.15);
    --border-radius-main: 16px;
    --transition-speed: 0.3s;

    /* Glassmorphism Variables */
    --glass-bg-light: rgba(255, 255, 255, 0.75);
    --glass-border-light: rgba(255, 255, 255, 0.7);
    --glass-bg-dark: rgba(28, 28, 28, 0.75);
    --glass-border-dark: rgba(255, 255, 255, 0.1);

    /* Alert & Status Colors */
    --alert-danger-color: #d92e2e; /* Superman Red */
    --alert-success-color: #198754; /* Success Green */
}

body.dark-theme {
    /* New "The Batman" Dark Theme */
    --primary-color: #101010;
    --secondary-color: #1c1c1c;
    --secondary-color-rgb: 28, 28, 28;
    --accent-color: #2a2a2a;
    --text-color: #f0f0f0;
    --highlight-color: #e02424; /* Vengeance Red */
    --highlight-color-rgb: 224, 36, 36;
    --shadow-color-light: rgba(0, 0, 0, 0.2);
    --shadow-color-dark: rgba(0, 0, 0, 0.4);

    /* Alert & Status Colors */
    --alert-danger-color: #e02424;
    --alert-success-color: #28a745;
}

/* --- Global Styles --- */
html {
    box-sizing: border-box;
}
*, *:before, *:after {
    box-sizing: inherit;
    transition: background-color var(--transition-speed), color var(--transition-speed), border-color var(--transition-speed), box-shadow var(--transition-speed);
}

body {
    font-family: 'Roboto', sans-serif;
    background-color: var(--primary-color);
    color: var(--text-color);
    margin: 0;
    padding: 0;
    text-align: center;
    /* Superman 2025 Theme */
    background-image: url('https://images3.alphacoders.com/137/thumb-1920-1379856.jpg');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    transition: background-color var(--transition-speed), color var(--transition-speed), background-image 0.5s ease-in-out;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
}

body.dark-theme {
    /* The Batman Theme */
    background-image: url('https://images.wallpapersden.com/image/download/batman-cool-the-dark-knight_bmZpaWyUmZqaraWkpJRqbWdprWhna2k.jpg');
}

#particles-js {
    position: fixed;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    z-index: -1;
    pointer-events: none;
}

/* --- Login Container Styling --- */
.login-container {
    width: 100%;
    max-width: 420px;
    padding: 2rem;
    background-color: var(--glass-bg-light);
    -webkit-backdrop-filter: blur(12px);
    backdrop-filter: blur(12px);
    border-radius: var(--border-radius-main);
    box-shadow: 0 10px 30px var(--shadow-color-dark);
    border: 1px solid var(--glass-border-light);
    z-index: 1;
}

body.dark-theme .login-container {
    background-color: var(--glass-bg-dark);
    border: 1px solid var(--glass-border-dark);
}

.login-container h1 {
    font-family: 'Orbitron', sans-serif;
    color: var(--highlight-color);
    margin-top: 0;
    margin-bottom: 1rem;
    font-size: 2.5rem;
    text-shadow: 0 2px 5px var(--shadow-color-dark);
}

/* Message styling for PHP feedback */
.message {
    padding: 1rem;
    margin-bottom: 1rem;
    border-radius: 8px;
    font-weight: 500;
    text-align: center;
}
.message.error {
    background-color: rgba(var(--alert-danger-color), 0.2);
    color: var(--alert-danger-color);
    border: 1px solid var(--alert-danger-color);
}
 .message.success {
    background-color: rgba(var(--alert-success-color), 0.2);
    color: var(--alert-success-color);
    border: 1px solid var(--alert-success-color);
}

.input-group {
    position: relative;
    margin-bottom: 1.5rem;
}

.input-group i {
    position: absolute;
    left: 15px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--highlight-color);
    font-size: 1.1rem;
}

.input-group input {
    width: 100%;
    padding: 1rem 1rem 1rem 45px;
    border-radius: 8px;
    border: 1px solid var(--glass-border-light);
    background-color: rgba(var(--secondary-color-rgb), 0.2);
    color: var(--text-color);
    font-size: 1rem;
    transition: all 0.3s;
}

body.dark-theme .input-group input {
    border: 1px solid var(--glass-border-dark);
}

.input-group input:focus {
    outline: none;
    border-color: var(--highlight-color);
    box-shadow: 0 0 0 3px rgba(var(--highlight-color-rgb), 0.25);
    background-color: rgba(var(--secondary-color-rgb), 0.5);
}

.login-btn {
    width: 100%;
    padding: 1rem;
    border-radius: 8px;
    border: none;
    background-color: var(--highlight-color);
    color: #fff;
    font-size: 1.2rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s;
    animation: pulse 2s infinite;
    margin-top: 1rem;
}

.login-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 5px 15px rgba(var(--highlight-color-rgb), 0.4);
}

@keyframes pulse {
    0% { transform: scale(1); box-shadow: 0 0 0 0 rgba(var(--highlight-color-rgb),0.4); }
    70% { transform: scale(1.05); box-shadow: 0 0 0 10px rgba(var(--highlight-color-rgb),0); }
    100% { transform: scale(1); box-shadow: 0 0 0 0 rgba(var(--highlight-color-rgb),0); }
}

.login-options {
    display: flex;
    justify-content: space-between;
    margin-top: 1.5rem;
}

.login-options a {
    color: var(--text-color);
    text-decoration: none;
    font-size: 0.9rem;
    transition: color 0.3s;
}

.login-options a:hover {
    color: var(--highlight-color);
    text-decoration: underline;
}

/* --- Theme Switcher --- */
.theme-switcher {
    position: absolute;
    top: 20px;
    right: 20px;
    display: flex;
    background-color: var(--primary-color);
    border-radius: 5px;
    padding: 4px;
    border: 1px solid var(--accent-color);
    z-index: 2;
}

.theme-switcher button {
    background: transparent;
    border: none;
    color: var(--text-color);
    padding: 0.5rem 0.7rem;
    border-radius: 5px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.theme-switcher button.active {
    background: var(--highlight-color);
    color: white;
    box-shadow: 0 2px 8px rgba(var(--highlight-color-rgb), 0.3);
}