/**
 * 移动端响应式优化
 * 统一所有页面的移动端体验
 */

/* ==================== 触摸友好的按钮尺寸 ==================== */
.btn,
.icon-btn,
button {
    min-height: 44px;
    min-width: 44px;
    touch-action: manipulation;
}

.btn {
    padding: 12px 20px;
}

.btn-sm {
    min-height: 40px;
    padding: 10px 16px;
}

.btn-lg {
    min-height: 52px;
    padding: 16px 32px;
}

/* ==================== 改进的导航菜单 ==================== */
.nav-mobile-toggle {
    display: none;
    width: 44px;
    height: 44px;
    align-items: center;
    justify-content: center;
    background: none;
    border: none;
    cursor: pointer;
    color: var(--ink, var(--text-primary, currentColor));
}

@media (max-width: 768px) {
    .nav-mobile-toggle {
        display: flex;
    }

    .nav-menu {
        position: fixed;
        top: 64px;
        left: 0;
        right: 0;
        background: var(--card, #ffffff);
        border-top: 1px solid var(--border, rgba(15, 23, 42, 0.12));
        padding: 16px;
        display: none;
        flex-direction: column;
        gap: 8px;
        box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
        z-index: 1000;
    }

    .nav-menu.show {
        display: flex;
    }

    .nav-link {
        padding: 12px 16px;
        border-radius: 8px;
        width: 100%;
    }
}

/* ==================== Course Detail 响应式优化 ==================== */
@media (max-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    aside.card {
        position: static !important;
        margin-top: 0;
        order: -1;
    }
}

@media (max-width: 768px) {
    aside.card {
        padding: 20px;
    }

    .course-title {
        font-size: 24px;
    }
}

/* ==================== Dashboard 响应式优化 ==================== */
@media (max-width: 1024px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 640px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }
}

/* ==================== 表单输入优化 ==================== */
input[type="text"],
input[type="email"],
input[type="password"],
input[type="search"],
textarea,
select {
    min-height: 44px;
    font-size: 16px;
    padding: 12px 16px;
}

/* ==================== 卡片网格响应式 ==================== */
@media (min-width: 1024px) {
    .courses-grid,
    .features-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (min-width: 768px) and (max-width: 1023px) {
    .courses-grid,
    .features-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 767px) {
    .courses-grid,
    .features-grid {
        grid-template-columns: 1fr;
    }
}

/* ==================== 安全区域适配 (iOS) ==================== */
@supports (padding: max(0px)) {
    .nav,
    .footer {
        padding-left: max(16px, env(safe-area-inset-left));
        padding-right: max(16px, env(safe-area-inset-right));
    }
}