:root {
    /* Dark Theme (Default) */
    --bg-primary: #0a0a0a;
    --bg-secondary: #1a1a1a;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --accent-primary: #00bfff;
    --accent-secondary: #0080ff;
    --border-color: #2a2a2a;
    --input-bg: #1a1a1a;
    --shadow-color: rgba(0, 191, 255, 0.1);
    --neon-glow: 0 0 10px rgba(0, 191, 255, 0.5);
}

[data-theme="light"] {
    --bg-primary: #f0f0f0;
    --bg-secondary: #ffffff;
    --text-primary: #2a2a2a;
    --text-secondary: #666666;
    --accent-primary: #0080ff;
    --accent-secondary: #0066cc;
    --border-color: #e0e0e0;
    --input-bg: #ffffff;
    --shadow-color: rgba(0, 128, 255, 0.1);
    --neon-glow: 0 0 10px rgba(0, 128, 255, 0.3);
}

@import url('https://fonts.googleapis.com/css2?family=Cairo:wght@200;300;400;500;600;700;800;900&display=swap');

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s, color 0.3s, border-color 0.3s, box-shadow 0.3s;
}

body {
    font-family: 'Cairo', sans-serif;
    line-height: 1.6;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    padding: 20px;
    min-height: 100vh;
}

/* Theme Toggle */
.theme-toggle {
    position: fixed;
    top: 20px;
    right: 20px;
    z-index: 1000;
}

.theme-toggle-btn {
    background: var(--bg-secondary);
    border: 2px solid var(--accent-primary);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--neon-glow);
    transition: all 0.3s;
}

.theme-toggle-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 0 15px var(--accent-primary);
}

[data-theme="dark"] .light-icon {
    display: none;
}

[data-theme="light"] .dark-icon {
    display: none;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    background-color: var(--bg-secondary);
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 0 20px var(--shadow-color);
    border: 1px solid var(--border-color);
}

h1 {
    text-align: center;
    color: var(--accent-primary);
    margin-bottom: 30px;
    font-size: 2.5em;
    text-shadow: var(--neon-glow);
    letter-spacing: 2px;
    font-weight: 700;
}

h2 {
    color: var(--accent-secondary);
    margin-bottom: 15px;
    font-size: 1.3em;
    text-shadow: 0 0 5px var(--accent-secondary);
    font-weight: 600;
}

.form-group {
    margin-bottom: 25px;
    background: var(--bg-primary);
    padding: 20px;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

/* Radio Buttons */
input[type="radio"] {
    accent-color: var(--accent-primary);
    margin-right: 8px;
}

label {
    color: var(--text-secondary);
    margin-right: 15px;
    cursor: pointer;
    font-weight: 500;
}

/* Input Fields */
input[type="text"],
input[type="url"],
textarea,
select {
    width: 100%;
    padding: 12px;
    background-color: var(--input-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 14px;
    transition: all 0.3s;
    font-family: 'Cairo', sans-serif;
}

input[type="text"]:focus,
input[type="url"]:focus,
textarea:focus,
select:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: var(--neon-glow);
}

textarea {
    min-height: 100px;
    resize: vertical;
    font-family: 'Cairo', monospace;
}

/* Submit Button */
button[type="submit"] {
    width: 100%;
    padding: 15px;
    background: linear-gradient(45deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: all 0.3s;
    box-shadow: var(--neon-glow);
    font-family: 'Cairo', sans-serif;
}

button[type="submit"]:hover {
    transform: translateY(-2px);
    box-shadow: 0 0 20px var(--accent-primary);
}

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

/* Notification */
.notification {
    position: fixed;
    top: 20px;
    right: 20px;
    padding: 15px 25px;
    border-radius: 6px;
    color: white;
    font-weight: 600;
    display: none;
    z-index: 1000;
    animation: slideIn 0.3s ease-out;
    box-shadow: var(--neon-glow);
    font-family: 'Cairo', sans-serif;
}

.notification.success {
    background: linear-gradient(45deg, #00bfff, #0080ff);
}

.notification.error {
    background: linear-gradient(45deg, #ff4444, #cc0000);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

/* Scrollbar */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-secondary);
}