/* ===== CSS 變數定義 - 無印風格增強版（暖色系） ===== */
:root,
html[data-theme="light"] {
    /* 無印風格 - 亮色模式：溫暖、自然、米黃色調 */
    --bg-color: #FAF8F5;
    --text-color: #3E3733;
    --text-secondary: #7A6F5D;
    --link-color: #7A6F5D;
    --primary-bg: #9A8C7A;
    --primary-border: #8A7D6C;
    --primary-hover: #7A6F5D;
    --border-color: #E8E3DA;
    --border-emphasis: #D8D0C5;
    --content-bg: #F5F1EA;
    --content-card: #FFFDFB;
    --sidebar-gradient-start: #F8F3E8;
    --sidebar-gradient-end: #DDD4C3;
    --nav-link-color: #5A5045;
    --nav-link-active-bg: rgba(154, 140, 122, 0.12);
    --nav-link-hover-bg: rgba(154, 140, 122, 0.06);
    --card-background: #FFFDFB;
    --input-background: #FFFDFB;
    --input-border: #D8D0C5;
    --shadow-sm: 0 1px 2px rgba(62, 55, 51, 0.04);
    --shadow-md: 0 2px 8px rgba(62, 55, 51, 0.06);
    --shadow-lg: 0 4px 16px rgba(62, 55, 51, 0.08);
    --accent-warm: #C9B5A0;
}

html[data-theme="dark"] {
    /* 無印風格 - 深色模式：柔和、有質感、低對比 */
    --bg-color: #1C1C1C;
    --text-color: #D4D4D4;
    --text-secondary: #9E9E9E;
    --link-color: #ABABAB;
    --primary-bg: #6B6B6B;
    --primary-border: #5A5A5A;
    --primary-hover: #7A7A7A;
    --border-color: #404040;
    --border-emphasis: #505050;
    --content-bg: #2A2A2A;
    --content-card: #242424;
    --sidebar-gradient-start: #2A2A2A;
    --sidebar-gradient-end: #1F1F1F;
    --nav-link-color: #ABABAB;
    --nav-link-active-bg: rgba(170, 170, 170, 0.12);
    --nav-link-hover-bg: rgba(170, 170, 170, 0.06);
    --card-background: #242424;
    --input-background: #2A2A2A;
    --input-border: #505050;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.2);
    --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.4);
    --accent-warm: #5A5550;
}

html, body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Helvetica Neue', Arial, sans-serif;
    margin: 0;
    padding: 0;
    font-weight: 400;
    letter-spacing: 0.01em;
    line-height: 1.6;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    transition: background-color 0.3s ease, color 0.3s ease;
}

a, .btn-link {
    color: var(--link-color);
    text-decoration: none;
    transition: color 0.2s ease;
    border-bottom: 1px solid transparent;
}

a:hover, .btn-link:hover {
    color: var(--text-color);
    border-bottom-color: var(--border-emphasis);
}

.btn-primary {
    color: #fff;
    background-color: var(--primary-bg);
    border: 1px solid var(--primary-border);
    border-radius: 2px;
    font-weight: 400;
    letter-spacing: 0.03em;
    padding: 0.5rem 1.25rem;
    box-shadow: var(--shadow-sm);
    position: relative;
    overflow: hidden;
}

/* 添加微妙的光澤效果 */
.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.1),
        transparent
    );
    transition: left 0.5s ease;
}

.btn-primary:hover::before {
    left: 100%;
}

.btn:focus, .btn:active:focus, .btn-link.nav-link:focus, .form-control:focus, .form-check-input:focus {
    box-shadow: 0 0 0 2px var(--content-bg), 0 0 0 4px var(--border-emphasis);
    outline: none;
}

.content {
    padding-top: 1.5rem;
}

h1:focus {
    outline: none;
}

.valid.modified:not([type=checkbox]) {
    outline: 1px solid #26b050;
}

.invalid {
    outline: 1px solid #e50000;
}

.validation-message {
    color: #e50000;
}

.blazor-error-boundary {
    background: url(data:image/svg+xml;base64,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) no-repeat 1rem/1.8rem, #b32121;
    padding: 1rem 1rem 1rem 3.7rem;
    color: white;
}

    .blazor-error-boundary::after {
        content: "An error has occurred."
    }

.darker-border-checkbox.form-check-input {
    border-color: #929292;
}

.form-floating > .form-control-plaintext::placeholder, .form-floating > .form-control::placeholder {
    color: var(--bs-secondary-color);
    text-align: end;
}

.form-floating > .form-control-plaintext:focus::placeholder, .form-floating > .form-control:focus::placeholder {
    text-align: start;
}

/* ===== 深色模式表格樣式 ===== */
html[data-theme="dark"] .table {
    color: var(--text-color);
    border-color: var(--border-color);
}

html[data-theme="dark"] .table thead th {
    border-bottom-color: var(--border-color);
}

html[data-theme="dark"] .table tbody tr {
    border-bottom-color: var(--border-color);
}

html[data-theme="dark"] .table td,
html[data-theme="dark"] .table th {
    border-color: var(--border-color);
}

/* ===== 深色模式標題樣式 ===== */
html[data-theme="dark"] h1,
html[data-theme="dark"] h2,
html[data-theme="dark"] h3,
html[data-theme="dark"] h4,
html[data-theme="dark"] h5,
html[data-theme="dark"] h6,
html[data-theme="dark"] p {
    color: var(--text-color);
}

/* ===== 深色模式按鈕樣式 ===== */
html[data-theme="dark"] .btn-primary {
    background-color: var(--primary-bg);
    border-color: var(--primary-border);
}

html[data-theme="dark"] .btn-primary:hover {
    background-color: var(--primary-hover);
    border-color: var(--primary-hover);
}

/* ===== 響應式字體大小 - 手機端 ===== */
@media (max-width: 767.98px) {
    body {
        font-size: 14px;
    }

    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
}

/* ===== 響應式字體大小 - 平板端 ===== */
@media (min-width: 768px) and (max-width: 1023.98px) {
    body {
        font-size: 15px;
    }

    h1 { font-size: 2rem; }
    h2 { font-size: 1.625rem; }
    h3 { font-size: 1.375rem; }
}

/* ===== 響應式字體大小 - 桌面端 ===== */
@media (min-width: 1024px) {
    body {
        font-size: 16px;
    }

    h1 { font-size: 2.25rem; }
    h2 { font-size: 1.875rem; }
    h3 { font-size: 1.5rem; }
}

/* ===== 按鈕過渡動畫效果 - 無印風格 ===== */
.btn-primary {
    transition: all 0.2s ease;
    box-shadow: 0 1px 2px var(--shadow-color);
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    box-shadow: 0 2px 4px var(--shadow-color);
    transform: none; /* 無印風格：極簡，不使用過度動畫 */
}

.btn-primary:active {
    box-shadow: 0 1px 2px var(--shadow-color);
    opacity: 0.9;
}

html[data-theme="dark"] .btn-primary {
    box-shadow: 0 1px 2px var(--shadow-color);
}

html[data-theme="dark"] .btn-primary:hover {
    box-shadow: 0 2px 4px var(--shadow-color);
}

/* ===== 表單控制項響應式調整 ===== */
@media (max-width: 767.98px) {
    .form-control,
    .btn {
        font-size: 16px; /* 防止 iOS 自動縮放 */
    }
}

/* ===== 平滑滾動 ===== */
html {
    scroll-behavior: smooth;
}

/* ===== 無障礙焦點樣式 ===== */
*:focus-visible {
    outline: 2px solid var(--link-color);
    outline-offset: 2px;
}