:root {
    --primary-color: #4361ee;
    --primary-hover: #3751d4;
    --secondary-bg: #f8f9fa;
    --secondary-hover: #e9ecef;
    --text-main: #2d3436;
    --text-muted: #636e72;
    --border-color: #dee2e6;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial, sans-serif;
    background-color: #f5f7fa;
    color: var(--text-main);
    margin: 0;
    padding: 40px 20px;
    display: flex;
    justify-content: center;
}

.container {
    background: #ffffff;
    padding: 30px;
    border-radius: 12px;
    box-shadow: 0 8px 30px rgba(0,0,0,0.08);
    width: 100%;
    max-width: 800px;
}

h1 {
    font-size: 24px;
    text-align: center;
    margin-bottom: 30px;
    font-weight: 700;
}

label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
    margin-bottom: 10px;
}

textarea {
    width: 100%;
    padding: 15px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    font-size: 14px;
    line-height: 1.5;
    resize: vertical;
    box-sizing: border-box;
    background: #fcfcfc;
    margin-bottom: 20px;
    transition: all 0.2s;
}

textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: #fff;
    box-shadow: 0 0 0 3px rgba(67, 97, 238, 0.1);
}

.btn-stack {
    display: flex;
    flex-direction: column;
    gap: 12px;
    margin-bottom: 25px;
}

.btn-row-3 {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 10px;
}

.attr-group {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
    margin-top: 15px;
}

button {
    border: 1px solid transparent;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    padding: 12px 16px;
}

.btn-main {
    background-color: var(--primary-color);
    color: white;
    text-align: center;
}

.btn-main:hover {
    background-color: var(--primary-hover);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(67, 97, 238, 0.2);
}

.btn-secondary {
    background-color: var(--secondary-bg);
    color: var(--text-main);
    border: 1px solid var(--border-color);
}

.btn-secondary:hover {
    background-color: var(--secondary-hover);
    border-color: #adb5bd;
    transform: translateY(-1px);
}

.btn-wide {
    width: 100%;
}

.btn-mini {
    background-color: #fff;
    border: 1px solid var(--border-color);
    color: var(--text-main);
    padding: 8px 18px;
    font-size: 13px;
}

.btn-mini:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background-color: #f8f9ff;
}

.section-title {
    display: flex;
    align-items: center;
    text-align: center;
    font-size: 12px;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--text-muted);
    margin: 30px 0 10px;
}

.section-title::before,
.section-title::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--border-color);
}

.section-title::before { margin-right: 15px; }
.section-title::after { margin-left: 15px; }

.copy-footer {
    display: flex;
    justify-content: flex-end;
    margin-top: -10px;
}

.btn-copy {
    background-color: #34495e;
    color: white;
    padding: 10px 25px;
    border: none;
}

.btn-copy:hover {
    background-color: #2c3e50;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

@media (max-width: 600px) {
    .btn-row-3 { grid-template-columns: 1fr; }
}