@font-face {
    font-family: HP001;
    font-weight: normal;
    font-style: normal;
    font-display: block;
    src: url(/static/font/HP001N30.ttf) format('truetype');
}

@font-face {
    font-family: HP001;
    font-weight: bold;
    font-style: normal;
    font-display: block;
    src: url(/static/font/HP001B30.ttf) format('truetype');
}

:root {
    --primary: #1976d2;
    --primary-hover: #1565c0;
    --bg-page: #f8fafc;
    --surface: #ffffff;
    --border: #e2e8f0;
    --text-main: #1e293b;
    --text-muted: #64748b;
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-page);
    color: var(--text-main);
    line-height: 1.5;
}

/* Header */
.app-header {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    padding: 12px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
}

.brand h1 {
    margin: 0;
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-main);
}

.brand span {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.nav-links {
    display: flex;
    gap: 12px;
    align-items: center;
}

.nav-links a {
    color: var(--primary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    padding: 6px 12px;
    border-radius: 6px;
    transition: background 0.15s;
}

.nav-links a:hover {
    background: #e2e8f0;
}

/* Layout Containers */
.app-main {
    width: 100%;
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

.panel-container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 16px 20px 0 20px;
    box-sizing: border-box;
}

.board-container {
    width: 100%;
    padding: 0 16px 24px 16px;
    box-sizing: border-box;
}

/* Control Panel */
.panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 18px;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
    margin-bottom: 20px;
}

.input-section {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.input-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.input-header label {
    font-weight: 600;
    font-size: 0.95rem;
}

.sample-select-wrapper {
    display: flex;
    align-items: center;
    gap: 8px;
}

.sample-select-wrapper span {
    font-size: 0.85rem;
    color: var(--text-muted);
}

textarea#input {
    width: 100%;
    min-height: 110px;
    padding: 12px 14px;
    font-size: 1.1rem;
    font-family: inherit;
    border: 1.5px solid var(--border);
    border-radius: 8px;
    resize: vertical;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
    background: #ffffff;
    color: #1e293b;
}

textarea#input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(25, 118, 210, 0.15);
}

/* Controls Toolbar */
.toolbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    margin-top: 16px;
    padding-top: 16px;
    border-top: 1px solid var(--border);
}

.tool-group {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 14px;
}

.tool-item {
    display: flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
}

.tool-item label {
    font-weight: 500;
    color: var(--text-main);
    cursor: pointer;
}

select, input[type="text"] {
    padding: 6px 10px;
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.9rem;
    background: #ffffff;
    color: var(--text-main);
    outline: none;
}

select:focus {
    border-color: var(--primary);
}

input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--primary);
}

input[type="color"] {
    -webkit-appearance: none;
    border: 1px solid var(--border);
    border-radius: 6px;
    width: 34px;
    height: 32px;
    padding: 2px;
    cursor: pointer;
    background: #ffffff;
}

input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: 4px;
}

/* Action Buttons */
.action-group {
    display: flex;
    align-items: center;
    flex-wrap: wrap;
    gap: 8px;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    border: 1px solid transparent;
    transition: background 0.15s, transform 0.05s;
    text-decoration: none;
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: var(--primary);
    color: #ffffff;
}

.btn-primary:hover {
    background: var(--primary-hover);
}

.btn-outline {
    background: #ffffff;
    border-color: var(--border);
    color: var(--text-main);
}

.btn-outline:hover {
    background: #f1f5f9;
}

.btn-success {
    background: #10b981;
    color: #ffffff;
}

.btn-success:hover {
    background: #059669;
}

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-content {
    display: none;
    position: absolute;
    right: 0;
    background-color: #ffffff;
    min-width: 180px;
    box-shadow: 0px 8px 16px rgba(0, 0, 0, 0.15);
    border: 1px solid var(--border);
    border-radius: 6px;
    z-index: 100;
    overflow: hidden;
}

.dropdown:hover .dropdown-content {
    display: block;
}

.dropdown-item {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    color: var(--text-main);
    text-decoration: none;
    font-size: 0.85rem;
    cursor: pointer;
    background: #ffffff;
    border: none;
    width: 100%;
    text-align: left;
}

.dropdown-item:hover {
    background-color: #f1f5f9;
}

/* Responsive adjustments */
@media (max-width: 768px) {
    .app-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .toolbar {
        flex-direction: column;
        align-items: flex-start;
    }

    .action-group {
        width: 100%;
        justify-content: flex-start;
    }
}

/* App Footer */
.app-footer {
    padding: 16px 24px 32px 24px;
    text-align: center;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.app-footer a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
}

.app-footer a:hover {
    text-decoration: underline;
}