:root {
    --background-color: #1E1E2F;
    --text-color: #E4E4E4;
    --link-color: #8C88F3;
    --link-hover-color: #B8A9F3;
    --heading-color: #D1D1FF;
    --form-bg-color: #2C2C41;
    --form-border-color: #3A3A5C;
    --button-bg-color: #6F48C9;
    --button-hover-bg-color: #5A3D99;
    --table-header-bg-color: #2A2A47;
    --table-header-text-color: #8C88F3;
    --blockquote-bg-color: #2C2C41;
    --blockquote-border-color: #8C88F3;
    --code-bg-color: #3A3A5C;
    --pre-bg-color: #2A2A47;
    --scrollbar-thumb-color: #444444;
    --scrollbar-track-color: #1E1E2F;

    --h1-font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --h2-font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --h3-font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --p-font-family: 'Arial', sans-serif;
}

body {
    background-color: var(--background-color);
    color: var(--text-color);
    font-family: var(--p-font-family);
    margin: 0;
    padding: 0;
}

a {
    color: var(--link-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
    color: var(--link-hover-color);
}

h1, h2, h3, h4, h5, h6 {
    text-align: center;
    color: var(--heading-color);
    font-family: var(--h1-font-family);
    margin-bottom: 0.5em;
}

h2 { font-family: var(--h2-font-family); }
h3 { font-family: var(--h3-font-family); }

p {
    line-height: 1.6;
    margin-bottom: 1em;
    font-family: var(--p-font-family);
}

ul, ol {
    margin-left: 2em;
    margin-bottom: 1em;
}

input, textarea, select, button {
    background-color: var(--form-bg-color);
    color: var(--text-color);
    border: 1px solid var(--form-border-color);
    padding: 10px;
    font-size: 1rem;
    border-radius: 5px;
}

input:focus, textarea:focus, select:focus, button:focus {
    outline: none;
    border-color: var(--link-color);
}

button {
    background-color: var(--button-bg-color);
    color: white;
    border: none;
    padding: 10px 20px;
    font-size: 1rem;
    border-radius: 5px;
    cursor: pointer;
}

button:hover {
    background-color: var(--button-hover-bg-color);
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 2em;
}

th, td {
    padding: 12px;
    text-align: left;
    border-bottom: 1px solid var(--scrollbar-thumb-color);
}

th {
    background-color: var(--table-header-bg-color);
    color: var(--table-header-text-color);
}

::-webkit-scrollbar { width: 10px; }
::-webkit-scrollbar-thumb {
    background-color: var(--scrollbar-thumb-color);
    border-radius: 5px;
}
::-webkit-scrollbar-track { background-color: var(--scrollbar-track-color); }

@media (max-width: 768px) {
    body { padding: 20px; }
    h1 { font-size: 2em; }
    p { font-size: 1rem; }
}

.color-scheme-dropdown {
    position: absolute;
    right: 1%;
}

.header1 {
    display: flex;
    padding: 1%;
    border-bottom: solid var(--form-border-color);
}

.header2 {
    display: flex;
    border-bottom: solid var(--form-border-color);
    justify-content: center;
}

.header2 nav {
    padding: 1%;
    width: 100%;
}

.header2 nav a {
    padding: 2%;
}

.card-container {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    justify-content: space-between;
}

.card {
    width: 30%;
    padding: 20px;
    text-align: center;
    text-decoration: none;
    background-color: var(--form-bg-color);
    color: var(--text-color);
    border: 1px solid var(--form-border-color);
    border-radius: 10px;
    box-sizing: border-box;
    transition: transform 0.3s, box-shadow 0.3s;
}

.card p {
    margin: 0;
    font-size: 16px;
    font-weight: bold;
}

.card:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.middleform {
    display: block;
    text-align: -webkit-center;
    unicode-bidi: isolate;
    width: 100%;
}

.middleform input {
    margin: 1%;
    text-align: center;
}

.middleform button {
    margin: 1%;
}

.alert-error {
    background-color: rgba(180, 60, 60, 0.2);
    border: 1px solid #b43c3c;
    color: #ffaaaa;
    padding: 10px 14px;
    border-radius: 5px;
    margin-bottom: 16px;
    text-align: center;
}

.section-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin: 28px 0 12px 0;
}

.section-header h2 {
    text-align: left;
    margin: 0;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--link-color);
}

.section-header hr {
    flex: 1;
    border: none;
    border-top: 1px solid var(--form-border-color);
    margin: 0;
}

.tab-bar {
    display: flex;
    gap: 0;
    margin-bottom: 24px;
    border-bottom: 1px solid var(--form-border-color);
}

.tab-btn {
    background: none;
    border: none;
    border-bottom: 2px solid transparent;
    border-radius: 0;
    padding: 10px 24px;
    font-size: 1rem;
    color: var(--text-color);
    cursor: pointer;
    margin-bottom: -1px;
}

.tab-btn.active {
    border-bottom-color: var(--link-color);
    color: var(--heading-color);
}

.tab-btn:hover {
    background-color: transparent;
    color: var(--heading-color);
}

.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    color: var(--heading-color);
    font-size: 0.9rem;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    box-sizing: border-box;
}

.btn-danger {
    background-color: #8B3A3A;
    color: white;
    border: none;
    padding: 8px 14px;
    font-size: 0.9rem;
    border-radius: 5px;
    cursor: pointer;
}

.btn-danger:hover { background-color: #A04040; }

.btn-sm {
    padding: 8px 14px;
    font-size: 0.9rem;
}

.empty-state {
    text-align: center;
    padding: 40px;
    color: var(--link-color);
    opacity: 0.6;
}