:root {
    --bg-color: #f5f5f4;
    --text-color: #1c1917;
    --board-bg: #e7e5e4;
    --header-bg: #ffffff;
    --border-color: #d6d3d1;
}

/* Custom piece fonts for non-Unicode characters */
@font-face {
    font-family: "Piece-u2ff0-u53e4-u5bfa";
    src: url("../public/fonts/u2ff0-u53e4-u5bfa.ttf") format("truetype");
}
@font-face {
    font-family: "Piece-u2ff1-u6642-u9ce5";
    src: url("../public/fonts/u2ff1-u6642-u9ce5.ttf") format("truetype");
}
@font-face {
    font-family: "Piece-u2ff1-u800c-u9de6";
    src: url("../public/fonts/u2ff1-u800c-u9de6.ttf") format("truetype");
}

body {
    margin: 0;
    padding: 0;
    font-family: "Hiragino Mincho ProN", "Yu Mincho", "MS Mincho", "Noto Serif JP", serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    overflow-x: hidden;
    overflow-y: auto;
}

#app {
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

header {
    background-color: var(--header-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 16px 24px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.05);
    z-index: 100;
    transition: all 0.3s ease;
    position: sticky;
    top: 0;
}

header.collapsed {
    padding: 0;
    height: 0;
    overflow: hidden;
    border-bottom: none;
}

header.collapsed .header-content {
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.2s ease;
}

.header-toggle {
    position: fixed;
    top: 12px;
    right: 24px;
    background: #f3f4f6;
    border: 1px solid #d1d5db;
    border-radius: 4px;
    padding: 4px 8px;
    cursor: pointer;
    font-size: 14px;
    color: #4b5563;
    transition: background 0.2s, top 0.3s;
    z-index: 1000;
}

.header-toggle:hover {
    background: #e5e7eb;
}

header.collapsed ~ .header-toggle {
    top: 12px;
    background: rgba(255, 255, 255, 0.8);
    box-shadow: 0 2px 4px rgba(0,0,0,0.1);
}

.header-content h1 {
    margin: 0;
    font-size: 1.5rem;
    font-style: italic;
    font-weight: 900;
}

.header-content p {
    margin: 4px 0 8px;
    font-size: 0.85rem;
    color: #57534e;
}

#status-message {
    font-size: 0.9rem;
    font-weight: bold;
    color: #d97706;
    /* Amber-600 */
}

main {
    flex: 1;
    overflow-x: hidden;
    overflow-y: auto;
    padding: 0;
    display: flex;
    justify-content: flex-start;
    align-items: flex-start;
    width: 100vw;
    box-sizing: border-box;
}

.board-container {
    background-color: var(--board-bg);
    border: none;
    border-radius: 0;
    padding: 0;
    width: 100vw;
    max-width: 100vw;
    height: auto;
    box-sizing: border-box;
    margin: 0;
}

canvas {
    background-color: white;
    border-radius: 4px;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.2);
    cursor: pointer;
    image-rendering: auto;
}

/* Custom Scrollbar for the Board Container */
.custom-scroll::-webkit-scrollbar {
    width: 12px;
    height: 12px;
}

.custom-scroll::-webkit-scrollbar-track {
    background: #d6d3d1;
    border-radius: 6px;
}

.custom-scroll::-webkit-scrollbar-thumb {
    background-color: #78716c;
    border-radius: 6px;
    border: 3px solid #d6d3d1;
}

/* ── Search Bar ── */
.search-wrapper {
    position: relative;
    display: inline-block;
}

#piece-search {
    font-family: inherit;
    font-size: 0.9rem;
    padding: 6px 12px 6px 30px;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    outline: none;
    width: 360px;
    background: #fafaf9 url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='16' height='16' fill='%2378716c' viewBox='0 0 16 16'%3E%3Cpath d='M11.742 10.344a6.5 6.5 0 1 0-1.397 1.398h-.001l3.85 3.85a1 1 0 0 0 1.415-1.414l-3.85-3.85zm-5.242.156a5 5 0 1 1 0-10 5 5 0 0 1 0 10z'/%3E%3C/svg%3E") no-repeat 8px center;
    transition: border-color 0.2s, box-shadow 0.2s;
}

#piece-search:focus {
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.15);
}

.search-dropdown {
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    margin-top: 4px;
    background: #fff;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    box-shadow: 0 8px 20px rgba(0,0,0,0.12);
    max-height: 260px;
    min-width: 400px;
    overflow-y: auto;
    z-index: 100;
    display: none;
}

.search-dropdown.visible {
    display: block;
}

.search-item {
    padding: 8px 12px;
    cursor: pointer;
    font-size: 0.88rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid #f5f5f4;
}

.search-item:last-child {
    border-bottom: none;
}

.search-item:hover {
    background: #eff6ff;
}

.search-item .piece-label {
    font-weight: bold;
}

.search-item .piece-reading {
    color: #78716c;
    font-size: 0.8rem;
}

.search-item .piece-pos {
    color: #a8a29e;
    font-size: 0.78rem;
    white-space: nowrap;
}

.search-item .side-sente {
    color: #1d4ed8;
}

.search-item .side-gote {
    color: #dc2626;
}