/* Global 全域設定 */
:root {
    --primary: #ff7928; /* 主要顏色（按鈕、Icon） */
    --primary-dark: #e9691c; /* 滑鼠移入 */
    --text-dark: #242424; /* 主要文字 */
    --text-gray: #777777; /* 次要文字 */
    --background: #fff8f0;
    --white: #ffffff;
    --border: #f4e3d5;
}
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}
html {
    scroll-behavior: smooth; /* 頁面平滑捲動 */
    scroll-padding-top: 100px;
}
body {
    font-family: "Noto Sans TC", "Microsoft JhengHei", sans-serif; /* 設定字體與備用字體 */
    color: var(--text-dark);
    background: linear-gradient( /* 網頁背景：線性漸層 */
        180deg,
        #fffaf5 0%,
        #fff5e9 55%,
        #fffaf5 100%
    );
    min-height: 100vh;
}
a {
    text-decoration: none;
    color: inherit;
}
button,
select {
    font: inherit;
}
button {
    cursor: pointer;
}

/* Header 導覽列 */
.site-header {
    width: 100%;
    background: rgba(255, 255, 255, 0.95);
    border-bottom: 1px solid var(--border);
    position: sticky; /* 捲動時讓導覽列保持在指定位置 */
    top: 0;
    z-index: 100;
}
.navbar {
    max-width: 1440px;
    margin: 0 auto;
    padding: 0 40px;
    min-height: 76px;

    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 30px;
    font-weight: 800;
    white-space: nowrap;
}
.logo svg {
    width: 38px;
    height: 38px;
    color: var(--primary);
}
.logo strong {
    color: var(--primary);
}

/* Navigation */
.nav-links {
    display: flex;
    align-items: center;
    gap: 42px;
    height: 76px;
}
.nav-links a {
    height: 100%;
    display: flex;
    align-items: center;
    font-size: 16px;
    font-weight: 600;
    position: relative;
    transition: color 0.2s;
}
.nav-links a:hover,
.nav-links a.active {
    color: var(--primary);
}
.nav-links a.active::after { /* 導覽列文字下方那條橘色底線 */
    content: "";
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 3px;
    border-radius: 3px;
    background: var(--primary);
}

/* Login / Register */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 14px;
}
.icon-button {
    border: none;
    background: transparent; /* 讓按鈕背景透明 */
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 8px;
}
.icon-button svg {
    width: 24px;
    height: 24px;
}
.btn-login,
.btn-register {
    padding: 10px 26px;
    border-radius: 30px; /* 設定按鈕圓角 */
    font-weight: 600;
    white-space: nowrap;
}
.btn-login {
    border: 1px solid #d89b72;
    background: var(--white);
}
.btn-register {
    background: var(--primary);
    color: var(--white);
    border: 1px solid var(--primary);
}
.btn-register:hover, /* :hover：滑鼠移入效果 */
.btn-login:hover {
    opacity: 0.85; /* opacity 代表透明度 */
}

/* Header 私訊入口 */
/* 確保未登入時，訊息入口及未讀徽章不會顯示 */
.header-message-link[hidden],
.message-unread-badge[hidden] {
    display: none !important;
}

/* Header 未讀訊息數字 */
/* 訊息圖示作為未讀數字的定位基準 */
.header-message-link {
    position: relative;
}
/* 未讀訊息數字徽章 */
.message-unread-badge {
    position: absolute;
    top: 3px;
    right: 3px;

    display: flex;
    align-items: center;
    justify-content: center;

    min-width: 18px;
    height: 18px;
    padding: 0 4px;

    border-radius: 999px;
    background-color: #e53935;
    color: #ffffff;

    font-size: 11px;
    font-weight: 700;
    line-height: 1;
    white-space: nowrap;

    pointer-events: none;
}

/* RWD 平板 */
@media (min-width: 801px) and (max-width: 1100px) {
    .navbar {
        padding: 0 20px;
        min-height: 76px;

        flex-wrap: nowrap;
        justify-content: space-between;
        gap: 12px;
    }

    /* Logo */
    .logo {
        font-size: 24px;
        gap: 6px;
        flex-shrink: 0;
    }
    .logo svg {
        width: 30px;
        height: 30px;
    }

    /* 導覽列 */
    .nav-links {
        gap: 16px;
        height: 76px;
        flex-shrink: 0;
    }
    .nav-links a {
        font-size: 16px;
        white-space: nowrap;
    }

    /* 搜尋與會員選單 */
    .nav-actions {
        gap: 14px;
        flex-shrink: 0;
    }
    .icon-button {
        padding: 4px;
    }
    .icon-button svg {
        width: 20px;
        height: 20px;
    }
    /* 平板版未讀訊息數字位置 */
    .message-unread-badge {
        top: -3px;
        right: -3px;
    }
    .member-trigger {
        padding: 8px 12px;
        font-size: 13px;
    }
}

/* RWD 手機 */
@media (max-width: 800px) {
    .navbar {
        padding: 15px;
        min-height: auto;

        display: flex;
        flex-direction: column;
        flex-wrap: nowrap;
        align-items: center;
        justify-content: center;
        gap: 16px;
    }
    .logo {
        font-size: 25px;
        order: 1;
    }
    .logo svg {
        width: 30px;
        height: 30px;
    }
    .nav-links {
        order: 3;
        width: 100%;
        justify-content: center;
        gap: 16px;
        height: auto;
        flex-wrap: wrap;
    }
    .nav-links a {
        font-size: 13px;
        padding: 8px 0;
        white-space: nowrap;
    }
    .nav-actions {
        gap: 8px;
        order: 2;
        margin-left: 0;
        justify-content: center;
    }

    /* 手機版隱藏一般 Icon，保留私訊入口 */
    .icon-button {
        display: none;
    }
    .header-message-link {
        display: flex;
    }

    .btn-login,
    .btn-register {
        padding: 7px 13px;
        font-size: 13px;
    }
}