/* ============================================
   用户页面共用样式 (login.php, reg.php, dashboard.php)
   奶茶色调 + RWD 支持
   ============================================ */

/* --- CSS 变量：奶茶色调 --- */
:root {
    --milk-bg: #f5f1e8;
    --milk-card: #fffaf0;
    --milk-deep: #c9b59a;
    --milk-light: #f7f0e4;
    --primary: #b58963;
    --primary-dark: #a3764e;
    --primary-light: #e7d5ba;
    --text-main: #4a3b32;
    --text-sub: #7d6a57;
    --border: #d3c1aa;
    --error: #c62828;
    --error-bg: #ffe5e5;
    --error-border: #f5b5b5;
}

/* --- 基础重置 --- */
* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", "Noto Sans TC", sans-serif;
    background: var(--milk-bg);
    color: var(--text-main);
}

/* ============================================
   Login & Register 页面样式
   ============================================ */

.login-page,
.register-page {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px 16px;
}

.wrap {
    width: 100%;
    max-width: 420px;
    background: var(--milk-card);
    padding: 24px 20px;
    border-radius: 16px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--border);
}

.wrap h1 {
    font-size: 1.5rem;
    margin: 0 0 16px;
    color: var(--text-main);
    font-weight: 600;
}

.wrap label {
    display: block;
    margin-top: 14px;
    font-size: .9rem;
    color: var(--text-sub);
    font-weight: 500;
}

.wrap input[type="text"],
.wrap input[type="email"],
.wrap input[type="password"] {
    width: 100%;
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid var(--border);
    font-size: 1rem;
    margin-top: 6px;
    background: #fff;
    color: var(--text-main);
    transition: border-color 0.2s, box-shadow 0.2s;
}

.wrap input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(181, 137, 99, 0.15);
}

.wrap .btn {
    display: block;
    width: 100%;
    margin-top: 20px;
    padding: 12px 16px;
    border-radius: 999px;
    border: none;
    background: var(--primary);
    color: #fff;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

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

.wrap .btn:active {
    transform: translateY(1px);
}

.wrap .error {
    margin-top: 12px;
    padding: 10px 12px;
    border-radius: 8px;
    color: var(--error);
    font-size: .85rem;
    background: var(--error-bg);
    border: 1px solid var(--error-border);
}

.wrap .social {
    margin-top: 20px;
    border-top: 1px solid var(--border);
    padding-top: 16px;
    font-size: .9rem;
}

.wrap .social a {
    display: block;
    text-decoration: none;
    margin-top: 8px;
    padding: 10px 12px;
    border-radius: 10px;
    text-align: center;
    transition: background 0.2s;
}

.wrap .btn-google,
.wrap .btn-line,
.wrap .btn-apple {
    background: #fff;
    border: 1px solid var(--border);
    color: var(--text-main);
}

.wrap .btn-google:hover,
.wrap .btn-line:hover,
.wrap .btn-apple:hover {
    background: var(--milk-light);
}

.wrap .social > div {
    margin-top: 8px;
    font-size: .85rem;
    color: var(--text-sub);
}

/* ============================================
   Dashboard 页面样式
   ============================================ */

.dashboard-page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

.app-bar {
    background: var(--milk-deep);
    color: #fff;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
}

.app-title {
    font-size: 1.2rem;
    font-weight: 600;
}

.app-user {
    font-size: .9rem;
    opacity: .95;
}

.app-user a {
    color: #fff;
    text-decoration: underline;
    font-size: .85rem;
}

.app-user a:hover {
    opacity: 0.8;
}

.container {
    width: 100%;
    max-width: 960px;
    margin: 0 auto;
    padding: 16px 12px 24px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

/* 卡片样式 */
.card {
    background: var(--milk-card);
    border-radius: 16px;
    padding: 16px 14px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    border: 1px solid var(--border);
}

.card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 12px;
    flex-wrap: wrap;
    gap: 8px;
}

.calendar-title {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-main);
}

.calendar-controls {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
}

.btn {
    border: none;
    border-radius: 8px;
    padding: 6px 10px;
    font-size: .85rem;
    cursor: pointer;
    background: var(--primary-light);
    color: var(--text-main);
    transition: background 0.2s;
    font-weight: 500;
}

.btn:hover {
    background: #ddc5a5;
}

.btn-icon {
    width: 32px;
    text-align: center;
    padding: 6px 0;
}

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

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

.btn-outline {
    background: transparent;
    border: 1px solid var(--border);
}

.btn-outline.active {
    background: var(--primary);
    border-color: var(--primary);
    color: #fff;
}

.calendar-mode-toggle {
    display: inline-flex;
    border-radius: 8px;
    overflow: hidden;
    border: 1px solid var(--border);
}

.calendar-mode-toggle button {
    border-radius: 0;
    border: none;
    padding: 6px 12px;
    font-size: .85rem;
    background: var(--milk-light);
    cursor: pointer;
    color: var(--text-main);
    transition: background 0.2s;
}

.calendar-mode-toggle button.active {
    background: var(--primary);
    color: #fff;
}

.calendar-grid {
    margin-top: 8px;
}

.calendar-weekdays {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    font-size: .75rem;
    color: var(--text-sub);
    text-align: center;
    margin-bottom: 6px;
    font-weight: 500;
}

.calendar-weekdays div {
    padding: 6px 0;
}

.calendar-days {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
}

.calendar-cell {
    text-align: center;
    padding: 8px 0;
    font-size: .9rem;
    border-radius: 8px;
    cursor: default;
    min-height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.calendar-cell.other-month {
    color: #bbb;
}

.calendar-cell.today {
    border: 2px solid var(--primary);
    font-weight: 600;
    color: var(--primary);
}

.calendar-cell.selected {
    background: var(--primary);
    color: #fff;
}

.calendar-week-row {
    display: grid;
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
}

.legend-row {
    margin-top: 10px;
    font-size: .75rem;
    color: var(--text-sub);
    line-height: 1.5;
}

/* 功能卡片 */
.features-card {
    margin-top: 4px;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 10px;
    margin-top: 8px;
}

.feature-tile {
    background: #fff;
    border-radius: 12px;
    padding: 16px 12px;
    text-align: center;
    cursor: pointer;
    text-decoration: none;
    color: inherit;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.08);
    display: flex;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    border: 1px solid var(--border);
}

.feature-tile:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
    background: var(--milk-light);
}

.feature-icon {
    font-size: 1.8rem;
}

.feature-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-main);
}

.feature-subtitle {
    font-size: .8rem;
    color: var(--text-sub);
}

.feature-full-row {
    grid-column: 1 / -1;
    max-width: 320px;
    margin: 0 auto;
    width: 100%;
}

.footer-space {
    height: 12px;
}

/* ============================================
   响应式设计
   ============================================ */

@media (max-width: 600px) {
    .wrap {
        padding: 20px 16px;
        border-radius: 12px;
    }

    .wrap h1 {
        font-size: 1.3rem;
    }

    .wrap input[type="text"],
    .wrap input[type="email"],
    .wrap input[type="password"] {
        font-size: 16px; /* 防止 iOS 自动缩放 */
    }

    .app-bar {
        padding: 10px 12px;
        flex-wrap: wrap;
    }

    .app-title {
        font-size: 1.1rem;
    }

    .app-user {
        font-size: .85rem;
        width: 100%;
        margin-top: 4px;
    }

    .container {
        padding: 12px 10px 20px;
    }

    .card {
        padding: 14px 12px;
        border-radius: 12px;
    }

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

    .calendar-controls {
        width: 100%;
        justify-content: space-between;
    }

    .calendar-title {
        font-size: 1rem;
    }

    .calendar-cell {
        font-size: .85rem;
        padding: 6px 0;
        min-height: 32px;
    }

    .features-grid {
        grid-template-columns: 1fr;
        gap: 8px;
    }

    .feature-tile {
        padding: 14px 10px;
    }

    .feature-icon {
        font-size: 1.6rem;
    }

    .feature-title {
        font-size: .95rem;
    }

    .feature-subtitle {
        font-size: .75rem;
    }
}

@media (min-width: 600px) {
    .features-grid {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (min-width: 900px) {
    .features-grid {
        grid-template-columns: repeat(3, minmax(0, 1fr));
    }

    .container {
        padding: 20px 16px 32px;
    }

    .card {
        padding: 20px 18px;
    }
}