* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Orbitron', sans-serif;
}

:root {
    --color-bg: #000000;
    --color-panel-bg: rgba(18, 25, 34, 0.95);
    --color-text-primary: #00eaff;
    --color-text-secondary: #ff00ff;
    --color-text-light: #b0c4de;
    --color-button-bg: #000000;
    --color-button-glow: #00eaff;
    --color-input-border: #00eaff;
    --color-glitch: #ff00ff;
    --color-placeholder: #556677;
}

.light-theme {
    --color-bg: #f0f4f8;
    --color-panel-bg: rgba(255, 255, 255, 0.95);
    --color-text-primary: #004dff;
    --color-text-secondary: #32cd32;
    --color-text-light: #555555;
    --color-button-bg: #ffffff;
    --color-button-glow: #004dff;
    --color-input-border: #004dff;
    --color-glitch: #32cd32;
    --color-placeholder: #aaaaaa;
}

body {
    background-color: var(--color-bg);
    color: var(--color-text-light);
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
    transition: background-color 0.8s, color 0.8s;
    overflow: hidden;
    position: relative;
}

#particle-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

.chrono-container {
    background: var(--color-panel-bg);
    border: 1px solid var(--color-text-primary);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    padding: 40px;
    box-shadow: 0 0 50px var(--color-text-primary);
    max-width: 450px;
    width: 100%;
    z-index: 10;
    transition: transform 0.5s ease-out;
    position: relative;
}

.chrono-header {
    text-align: center;
    margin-bottom: 30px;
}

.chrono-header h1 {
    color: var(--color-text-primary);
    font-size: 2.5em;
    margin-bottom: 5px;
    text-shadow: 0 0 10px var(--color-text-primary);
}

.chrono-header p {
    color: var(--color-text-secondary);
    font-size: 0.9em;
}

#form-switch-area {
    display: flex;
    justify-content: space-between;
    margin-bottom: 25px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 10px;
    padding: 5px;
    border: 1px solid var(--color-input-border);
}

.switch-btn {
    flex-grow: 1;
    padding: 10px 0;
    border: none;
    background: transparent;
    color: var(--color-text-light);
    font-size: 1em;
    cursor: pointer;
    border-radius: 8px;
    transition: color 0.3s, background 0.3s, box-shadow 0.3s;
}

.switch-btn.active {
    background: var(--color-text-primary);
    color: var(--color-bg);
    font-weight: bold;
    box-shadow: 0 0 10px var(--color-text-primary);
}

.form-panel.hidden {
    display: none;
}

.input-group {
    margin-bottom: 20px;
    position: relative;
}

.input-group label {
    display: block;
    margin-bottom: 8px;
    color: var(--color-text-primary);
    font-size: 0.85em;
}

.input-group input {
    width: 100%;
    padding: 12px 15px;
    background: var(--color-button-bg);
    border: 2px solid var(--color-input-border);
    border-radius: 5px;
    color: var(--color-text-light);
    font-size: 1em;
    transition: border-color 0.3s, box-shadow 0.3s;
    outline: none;
}

.input-group input::placeholder {
    color: var(--color-placeholder);
}

.input-group input:focus {
    box-shadow: 0 0 15px var(--color-glitch);
    border-color: var(--color-glitch);
    animation: glitch-border 0.3s steps(1) infinite alternate;
}

.access-btn {
    width: 100%;
    padding: 15px;
    margin-top: 10px;
    background: var(--color-button-bg);
    border: 2px solid var(--color-button-glow);
    border-radius: 5px;
    color: var(--color-button-glow);
    font-size: 1.1em;
    cursor: pointer;
    text-transform: uppercase;
    transition: background 0.3s, color 0.3s, box-shadow 0.3s;
}

.access-btn:hover {
    background: var(--color-button-glow);
    color: var(--color-bg);
    animation: neon-pulse 1.5s infinite alternate;
}

.chrono-footer {
    text-align: center;
    margin-top: 30px;
    font-size: 0.7em;
    color: var(--color-text-light);
    opacity: 0.6;
}

.theme-toggle {
    position: absolute;
    top: 20px;
    right: 20px;
    background: var(--color-panel-bg);
    border: 1px solid var(--color-input-border);
    color: var(--color-text-primary);
    padding: 10px;
    border-radius: 50%;
    cursor: pointer;
    z-index: 20;
    font-size: 1.2em;
    transition: all 0.3s;
}

.theme-toggle:hover {
    box-shadow: 0 0 10px var(--color-button-glow);
}

.icon-dark, .icon-light {
    display: none;
}

.dark-theme .icon-dark {
    display: block;
}

.light-theme .icon-light {
    display: block;
}

.notification {
    position: fixed;
    top: 50px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 1000;
    padding: 15px 30px;
    border-radius: 10px;
    font-weight: bold;
    font-size: 1.1em;
    color: var(--color-bg);
    background: var(--color-text-secondary);
    border: 2px solid var(--color-text-primary);
    box-shadow: 0 0 20px var(--color-text-secondary);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s, visibility 0.5s, top 0.5s;
    text-align: center;
}

.notification.error {
    background: #ff0000;
    box-shadow: 0 0 20px #ff0000;
    border-color: #ff8888;
}

.notification.show-notification {
    opacity: 1;
    visibility: visible;
    top: 30px;
}

@keyframes glitch-border {
    0%   { border-color: var(--color-input-border); }
    33%  { border-color: var(--color-glitch); transform: translateX(1px); }
    66%  { border-color: var(--color-text-primary); transform: translateX(-1px); }
    100% { border-color: var(--color-glitch); transform: translateX(0); }
}

@keyframes neon-pulse {
    0%, 100% { box-shadow: 0 0 5px var(--color-button-glow), 0 0 10px var(--color-button-glow); }
    50% { box-shadow: 0 0 15px var(--color-button-glow), 0 0 30px var(--color-button-glow), 0 0 50px var(--color-button-glow); }
}

@media (max-width: 600px) {
    .chrono-container {
        max-width: 100%;
        width: 95%;
        padding: 20px;
        backdrop-filter: blur(5px);
    }
    .chrono-header h1 {
        font-size: 1.8em;
    }
    .theme-toggle {
        top: 10px;
        right: 10px;
        padding: 8px;
    }
    .notification {
        font-size: 0.9em;
        width: 90%;
    }
}